6225results about How to "Improve operational safety" patented technology

The invention discloses electrically-driven ultra-large-displacement well cementation equipment. The electrically-driven ultra-large-displacement well cementation equipment comprises a first loading body and a second loading body; an auxiliary motor, a main motor, a clear water module, a pumping module, a control module, a hydraulic module and a mixing module are fixedly loaded on the first loading body; and a frequency converter module is fixedly loaded on the second loading body. The electrically-driven ultra-large-displacement well cementation equipment has the beneficial effects that the main motor is adopted to drive a plunger pump, torque converters are reduced, the layout space of the whole vehicle is increased, the auxiliary motor is adopted to drive a whole vehicle hydraulic system, and the number of driving motors is reduced; the frequency converter module and the well cementation equipment are loaded separately, the loading requirement is lowered, the structure is simpler, the occupied space is reduced, one frequency converter module can supply power to all the modules on the multiple first loading bodies at the same time, and use is flexible; and the main motor, the auxiliary motor and the hydraulic heat dissipation device are intensively distributed on the front portion of the first loading body, wiring is simple, connection is convenient, heat dissipation of equipment is intensively achieved, scalding accidents of workers in the operation process are avoided, and operation safety is improved.

A method and device for the gasification of pulverized fuels from solid fuels such as bituminous coals, lignite coals, and their cokes, petroleum cokes, coke from peat or biomass, in entrained flow, with an oxidizing medium containing free oxygen, by partial oxidation at pressures between atmospheric pressure and 80 bar, and at temperatures between 1,200 and 1,900° C., at high reactor capacities between 1,000 and 1,500 MW. The method uses the following steps: metering of the fuel, gasification reaction in a gasification reactor with cooled reaction chamber contour, quench-cooling, crude gas scrubbing, and partial condensation.

The invention relates to an intelligent monitoring system for a boiler and a heat exchange station and a method thereof, which belong to the technical fields of production monitoring and security management. The system comprises a main system in a central control room, a plurality of boiler monitoring subsystems which are respectively connected with the main system in the central control room and a plurality of heat exchange station monitoring subsystems. The method comprises the following steps: parameters and video signals on site are collected and transmitted in real time and transmitted to a host machine in the central control room after being converted and compressed; the host machine carries out comprehensive processes of intelligent analysis, dynamic display, prewarning and warning and management for the received signals and transmit control commands to the monitoring subsystems to carry out control; and the monitoring subsystems can be cooperated with the central room to carry out monitoring or independently carries out monitoring to realize automatic control. The invention can realize real-time and dynamic intelligent control, prewarning and warning, security management and automatic monitoring for a large boiler or a boiler group and a heating network system and has the advantages of energy saving, consumption reduction, comprehensive analysis, safety, stability and economic operation.

The invention discloses car fault diagnosis remote alarming system and method. The car fault diagnosis remote alarming system comprises a vehicle-mounted fault diagnosis alarming device and a far end server; the vehicle-mounted fault diagnosis alarming device comprises a processor module, a CAN (Controller Area Network) bus communication module, a voltage comparison module, a wireless communication module and a display module; the processor module acquires fault signals in a switching-value mode, output by vehicle equipment, by the voltage comparison module, receives equipment fault signals on a CAN bus by the CAN bus communication module and controls the wireless communication module to communicate with the server wirelessly; and the display module is controlled by the processor module and displays the fault signals. The invention uses the vehicle-mounted fault diagnosis alarming device to acquire the fault information of all devices on a car, carries out real-time diagnosis and displays the fault signals when faults occur; and meanwhile, the invention transmits the fault signals to the far-end sever in the mode of wireless communication for storage so as to give an alarm to the server end and inform administrators at the server end to carry out processing in time.

The invention relates to a hydraulic cylinder surface shot blasting, paint spraying and drying system and a shot blasting, paint spraying and drying process thereof, and the hydraulic cylinder surface shot blasting, paint spraying and drying system consists of a hanging chain conveying system, a shot blasting working position, a paint spraying working position, a drying working position, an overhauling working position, an unloading working position, a loading working position, a paint mixing room, an air compressor and an operating room. The shot blasting, paint spraying and drying process comprises the following process steps: loading of a piece, shot blasting, derusting and cleaning (10-15min), automatic paint spraying (3-5min), paint refinishing, leveling (5min), drying at 60-80 DEG C (30min), natural cooling and unloading of the piece. The hydraulic cylinder surface shot blasting, paint spraying and drying system has the advantages of high degree of mechanical and electrical automation, small occupied area, good safety performance, and high production efficiency, is not affected by weather and can ensure the cleanliness, the temperature, the illumination and the safety and sanitation standard required by the paint spraying environment; and the shot blasting, paint spraying and drying process is simple, safe, time-saving, environment-friendly and high in working efficiency and can obtain the good appearance quality of a paint film.

The invention discloses a process for repairing water erosion damage of a flow passage component of a steam turbine and protecting the flow passage component of the steam turbine. In the process, molded lines of the flow passage component of the steam turbine are repaired by adopting copy overlaying of manual argon tungsten arc welding aiming at the phenomenon of the water erosion damage existing in the flow passage component of the steam turbine. A water erosion resistant coating is prepared by supersonic speed flame spraying so as to achieve the purposes of repairing the molded lines of the flow passage component of the steam turbine and protecting the molded lines at large area on line and prolonging the service life of the flow passage component of the steam turbine. Through the process of the invention, the flow passage component of the steam turbine can be repaired and protected at large area on line in a short time without changing vibration characteristic, steam-driven characteristic and strength characteristic of the flow passage component of the steam turbine, so that the process has the advantages of high on-site operability, small deformation of the repaired workpiece, remarkable improvement on water erosion resistance and the like, can solve the common problem of water erosion in the flow passage component of the power station steam turbine in service on site, improves the running safety and efficiency of units and increases economic benefit of a power plant.

The invention discloses a vehicle monitoring system based on Beidou system. The invention is characterized in that the system is composed of a Beidou ground monitoring centre, a Beidou navigating and locating satellite and a Beidou vehicle-mounted system, wherein the Beidou navigating and locating satellite is dependent on current satellite system built by Beidou network system. The Beidou vehicle-mounted system comprises a Beidou terminal and a train network. The train network is a current TCMS system, wherein the TCMS system comprises a vehicle dragging sub-system, a vehicle braking sub-system, a vehicle signal sub-system and a vehicle broadcasting sub-system. The TCMS system is communicated with a Beidou terminal via an RS232 interface to provide vehicle state information to the Beidou terminal on one hand, and to receive Beidou navigating and locating information, time service information and control instruction from the ground monitoring centre on the other hand so as to control the operation of the vehicle. The Beidou terminal is communicated with the locating satellite. The locating satellite is used for transmitting the locating information and vehicle state information to the ground monitoring centre. The centre is used for transmitting the information to all ground monitoring terminals so that the operated vehicle can be monitored and all operated vehicles can be monitored and controlled.

The invention discloses a communication navigation monitoring system based on a multi-mode data link. The communication navigation monitoring system based on the multi-mode data link comprises an airborne system, a Beidou commanding terminal, an ADS-B (automatic dependent surveillance-broadcast) ground station, a ground MC (mobile communication) base station and a ground data processing center, wherein a GNSS (global navigation satellite system) module is used for collecting positioning information in the airborne system, and data interaction is carried out between the GNSS module and a ground Beidou sending and receiving terminal via a satellite link; an airborne ADS-B module is used for sending and receiving ADS-B information; an MC data link is established by an airborne MC module; an airborne data processing module is used for carrying out link judgment and switching; in the ground data processing center, a data link management and control module is in charge of link selection; the link information is firstly pre-processed by a receiving data pre-processing module and is then processed by a data fusion module to be stored into a target state database module. According to the communication navigation monitoring system based on the multi-mode data link, which is disclosed by the invention, the modular design is adopted, the communication navigation monitoring system has the expandability, data link judgment and switching can be carried out in real time, and therefore operation cost is reduced.

The invention discloses an automatic boiler combustion control system of a circulating fluid bed, which is applied to machine sets for coal-fired power generation, heat supply or combined heat and power generation. The system comprises hardware and control program software, wherein the control program software comprises a fuel control part, an air volume control part and a deslagging control part, and the control program software can automatically and timely control the input quantity of boiler fuel, the oxygen content in the boiler and the boiler deslagging device. The combustion control system is applicable to all sorts of complicated operating conditions, has consistently correct and reliable reaction, advanced and reasonable algorithm design as well as good control effect, is safe and effective, has the capabilities of improving boiler combustion condition, increasing boiler combustion efficiency and reducing unburned carbon in flue dust, leads main steam pressure control to be stable, enhances the capability of tracking the change in load of the boiler and greatly improves the running safety performance, leads main steam temperature control precision to be effectively improved, avoids temperature excursion of an overheater, reduces the danger of steam turbine water slug caused by low-temperature steam, and improves the thermal efficiency and automation control degree of the steam turbine.

The invention provides an automatic operating stool tester. The tester is used for carrying out automatic smear and microscopy on the stool and other human secretions and selectively preserving the image-text data. The tester is characterized in that a power-driven three-dimensional Cartesian coordinate manipulator is formed by X, Y and Z axes; an operating bottom plate is provided with an automatic sample injection slider device; an operating disk spindle core rod is movably connected with the operating bottom plate; an automatic slide adding device is fixed on a rack; a microscope is installed in the front of the rack; and an automatic slide push-out device is fixed on the microscope. The tester can automatically open the stool sample box, automatically put the slide in the box, automatically feel about the image via the liquid crystal display, move the slide for microscopy through numerical control, automatically print the locked image, automatically close the stool box, automatically recycle the waste articles, automatically carry out ultraviolet disinfection, completely prevent the operators from closely contacting the stool, greatly improve the sensory organ comfort in the testing process, greatly enhance the operation safety and repeatability, introduce the test report with images and texts to the stool routine and provide most direct basis for clinical diagnosis.

The invention relates to a dispatching management system and a method for event emergency response of urban bus passenger transport. Methods of combining actual measurement data, event prediction model and algorithm as well as event real-time dispatching model and algorithm are comprehensively applied; geographical information technology, locating technology and modern communication technology are scientifically integrated; bus emergency dispatching technology developed through bus network intellectualization and multi-way coordinative dispatching technology of an urban bus passenger transport system are utilized; and an emergency coordinative dispatching model and the method are established by taking the networked bus passenger transport vehicle dispatching and operation dispatching management as a core and based on the key theories and methods for multi-way and multi-line intelligent coordinative dispatching of a urban bus and passenger transport system. The invention provides excellent theory, methods and technique supports for the real-time dispatching of urban bus events, effectively reduces the event recognition time, generates a quick real-time dispatching strategy, effectively eliminates the influences generated by the events, and resumes the driving plan so as to effectively improve the running efficiency and safety of buses.

A method for preparing single benzene ring phenolic compounds by catalytic conversion of alkali lignin. Hydrogen is added into water phase to degrade alkali lignin into single benzene ring phenolic compound, under a reaction temperature of 90-180 DEG C, a hydrogen pressure of 1.0-10.0MPa and under effect of a metal nanoparticle catalyst; and alkali compound is added into the reaction. The metal nanoparticle catalyst is one or more selected from Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag or Au in any ratio. The method has mild reaction conditions, low energy consumption, low costs, high operating safety and easily separated products.

The invention discloses a method for synthesizing a water-soluble imidazoline quaternary ammonium salt corrosion inhibitor. The method is characterized by comprising the following steps of performing amidation reaction on reaction raw materials organic acid and organic amine to synthesize amide, performing amide cyclization reaction to obtain imidazolidine, and quaternizing the oil-soluble imidazolidine by using a quaternizing agent such as dimethyl phosphite to synthesize the water-soluble imidazoline quaternary ammonium salt corrosion inhibitor. Evaluation tests show that an obtained product is high in water solubility and corrosion inhibition rate.

The present invention provides a riving knife assembly for use with a saw assembly, such as a table saw. The riving knife assembly is enabled with a riving knife blade having a first end for extending above a planar work surface established by the saw assembly and a second end for connecting the riving knife with the saw assembly. The second end of the riving knife blade includes a riving engagement mechanism which enables the riving knife blade to connect with a saw coupling mechanism in a manner which may promote the riving knife blade to be more quickly and easily inserted into and / or removed from an operational stance with the saw assembly.

The invention discloses a crane barrier monitoring and prewarning method and system based on binocular vision. The method includes the steps that a binocular vision model is established, and relevant parameters are initialized; images are acquired in real time and preprocessed; target edges are detected, and the characteristics of the images are extracted; the left images and the right images are registered, and a common area is segmented; iteration is repeatedly conducted, and foregrounds and backgrounds are distinguished; three-dimensional information is rebuilt, and the foregrounds and barriers are recognized; motion parameters are resolved, and prewarning information is analyzed and output. According to the crane barrier monitoring and prewarning method and system, a binocular vision system is adopted, the working environment of a crane is monitored in real time, the problem of preventing collision of the crane is effectively solved, and the system has the advantages of being high in efficiency, moderate in accuracy, simple in structure, low in cost, and very suitable for online, non-contact product detection and quality control on a manufacturing site.

A compound vibrating supersonic bone surgery instrument, including handle, operating knife and main machine, and inside the shell of the handle includes: transfer the signal emitted by supersonic signal generator to supersonic mechanical waves of energy converter, deliver the supersonic mechanical waves emitted by energy converter after amplitude magnification to amplitude changing pole of surgery knife to make the surgery knife vibrate longitudinally at supersonic frequency; install in the back end of the handle, and the energy converter and amplitude changing pole are rotated or swayed by driving motor; install on the clutch between the said driving motor and energy converter to deliver the supersonic signal emitted by supersonic signal generator to electric slip-ring of energy converter; cross the center bore of electric slip-ring and deliver the rotating and swaying movement of driving motor to the clutch of energy converter. The invention installs driving motor at the base of the energy converter, accomplishing compound supersonic vibration; accomplishing cold cutting; avoiding the broken of surgery knives as a result of the concentration of stress.

The invention provides an urban traffic junction signal lamp self-adaption control method based on vehicle-mounted data. By means of the method, self-adaption control over a signal lamp of an intersection based on the vehicle-mounted data for the unsaturated state and the oversaturated state of the upstream road in front of the middle junction of the intersection with at least one junction is achieved. The urban traffic junction signal lamp self-adaption control method includes the first step of reading the geometrical shape, the lane number and lane functions of the intersection, the second step of judging whether the junction is in the unsaturated state or the oversaturated state according to the vehicle mounted data, and the third step of utilizing an unsaturated state optimization method when the junction is judged to be in the unsaturated state, and utilizing an oversaturated state optimization method when the junction is judged to be in the oversaturated state.

The invention relates to a power system weak link identification method based on risk evaluation and belongs to the field of power system analysis. The method includes acquiring fault probability of elements of a power system, a future load curve of the power system, states of the elements and load of nodes of the power system; utilizing a minimum load shedding loss optimization model to judge the failure state of the power system and determining the optimum load shedding quantity of each node under each element sampling state; finishing calculation of risk indicators of the power system through repeated sampling and power system failure state judgment; conducting statistics on the weak link characteristic quantity corresponding to faults of generators and an electric transmission and transformation device, calculating five element weakness recognition indicators of the elements according to the risk indicators and the weak link characteristic quantity and finally sorting the recognition indicator values to recognize the weak link of a generator set and the electric transmission and transformation device. By means of the method, the weak link of the power system is improved, large-area power failure of the power system is prevented, and operation safety of the power system is improved.

The invention discloses a built-in intelligent failure diagnosis device based on data fusion mode recognition in the technical field of intelligent diagnosis of rail transport failure, which comprises a hardware structure and a software structure. The diagnosis device adopts high-speed DPS microprocessor and forms a distributive monitor processing system, that is, a two-level microcomputer structure with a supervisory machine and a subordinate machine with the help of a multiple-stage buffer and streamline mechanism in the high-speed data processing of the former. Besides, in coordination with sensor group information based on data fusion mode recognition and with the help of multiple neural network partial diagnosis and a decision-making level fusion mode recognition and intelligent diagnosis mechanism, the invention is able to realize the data storage, image display and long-distance data transmission, so as to complete the task of failure diagnosis. Therefore, the invention is able to detect the potential failure of key equipments for train, ensure the safety and reliability for the operation of key equipment in train and improve the operation efficiency and safety guarantee to the maximal extent.

The invention relates to an comprehensive automatic system imitation platform for a large power plant, comprising that an 'imitation machine' part is a power station imitation platform for simulating the power plant production process by real-time and providing an actual and effective testing and analysis platform to improve the power station automatic level; a distributed control system comprises a plurality of control points in the actual site, a work station, a display, a printer, a data server and a double-redundancy fiber optical ring-shaped communication network; the 'actual power' part is the 'actual power' part of the power station simulation platform, and comprises a site input signal collecting system, a site testing and control instrument and an execution mechanism of the output signal of the simulation platform. The invention is constructed into a comprehensive automatic system research platform of the completely interacted power plant so as to conduct the analysis and research of the operation of the entire equipment of the power plant system without being limited by each condition on site, thereby, the time and the cost of the system design, testing and optimization can be largely saved, the economy and the safety of the power plant operation can be improved.

The invention discloses an on-line recognition method of the road traffic congestion state, relating to a traffic information processing method which comprises the following steps of: acquiring interval traffic parameter data and location traffic parameter data; transmitting the data back to an information processor; analyzing the traffic parameter data through the information processor by adopting the on-line recognition method; and determining the congestion conditions, the congestion time and the spatial diffusion range of each road section by using the acquired interval traffic parameter and the location traffic parameter for serving other subsystems of a traffic management and control system. The invention provides real-time and reliable traffic state information for the traffic management and control system of the road as well as an important information base for the science of the traffic management decision and the traffic travel decision.

The invention discloses a composite coating carbon / carbon composite material crucible comprising a carbon / carbon composite material crucible, a silicon carbide coating adhered on the inner surface of the carbon / carbon composite material crucible, a silicon coating adhered on the silicon carbide coating, and a silicon nitride coating adhered on the silicon coating. Also, the invention discloses a preparation method of the composite coating carbon / carbon composite material crucible. According to the invention, silicon nitride is combined with the silicon carbide composite coating, such that corrosion of silicon-containing steam upon the inner profile of the carbon / carbon composite material crucible can be effectively inhibited, and crucible service life is greatly improved. With a chemical vapor reaction method, SiC coating in-situ production is achieved. Compared with a traditional SiC coating prepared with a CVD method, the bonding strength with the carbon / carbon substrate is higher. Also, excessive Si coating is produced on site, such that Si source is provided for the production of the silicon nitride coating. The silicon nitride coating produced with high-purity nitrogen has improved bonding strength, such that corrosion resistance of the crucible is further improved.

The invention discloses a distributed type power supply zone branch circuit three-phase load current balance monitoring method and device and belongs to the field of power supply and distribution devices. At least one three-phase load current balance main controller is arranged, load current signals of each phase circuit in each branch loop are collected, according to the obtained load current signals of each phase circuit, the three-phase current unbalance rate or the mean value of the three-phase current unbalance rate of each branch loop is computed, and the unbalance situation of three-phase load current of each branch loop is judged. The magnitude of load current in each unit meter box of each branch loop is collected, and the phase of unit meter box load which needs to be adjusted is determined. According to the three-phase load current unbalance situation of a certain branch, a control instruction is issued to an automatic phase-changing switch in a unit meter box corresponding to the branch loop, converting of load phases is carried out, adjusting of three-phase load current balance of each branch loop on the low-voltage side of a distribution transformer is achieved, and the real balance of distribution transformer low-voltage side main loop three-phase load current is guaranteed.

The invention relates to an intelligent emergency management method for urban public transports. The invention comprehensively applies a method of combining theoretical analysis, measured data, model and algorithm, scientifically integrates geographic information system technology (GIS technology), global positioning system technology (GPS technology) and modern communication technology, utilizes intelligently developed public transport emergency technology of a public transport network and coordinative dispatching technology of a traffic control system, takes network-based dispatching and operation management of public transports as a core, is based on key theories and methods of intelligent coordinative dispatching between public traffic system lines, establishes an emergency management method oriented at public transport events, provides good theories, methods and technical support for intelligent management of the urban public transports, and effectively improves the operation efficiency and the operation safety of the public transports by effectively reducing the event detection and acknowledgement time, adopting proper event response measures, safely removing events and managing influenced public transports until the public transports restore the prior traffic capacity.

The invention provides an adjustable feed water heat regenerative system for a turbo generator unit, which comprises a high pressure cylinder of a steam turbine, a final-stage extraction opening, a final-stage feed water heater, a steam extraction pipe and a regulating valve, wherein the final-stage extraction opening is additionally arranged on the high pressure cylinder; the steam extraction pressure of the final-stage extraction opening is much higher than the common highest extraction pressure; additionally extracted steam is used as a heat source of the final-stage feed water heater; the steam extraction pipe is connected with the final-stage extraction opening and the final-stage feed water heater; and the regulating valve is arranged on the steam extraction pipe. Part of steam which does work is guided to the feed water heater through the final-stage steam extraction pipe so as to further heat feed water of a boiler. The heat regenerative system provided by the invention is an elastic heat regenerative system. The temperature of the feed water can be maintained or changed under the variable load condition of the unit, so that the environmental friendliness, the economy and the safety of the unit are improved and the frequency modulation characteristic is perfected.

The present invention concerns a rotor blade hub for a wind power installation. Such a hub represents a mechanical connection between the (horizontal) rotor shaft (rotor spindle) and the rotor blades. This means that all forces which occur at the rotor blades, insofar as they are not forces in the rotor blades themselves, also occur at the hub. Besides the (intentional) rotational forces, these involve inter alia also centrifugal forces and forces, loads and moments which arise out of the action of the wind on the rotor blades. Therefore the object of the present invention is to provide a rotor blade hub which, being of the required dimensions, satisfies all demands for reliable and safe operation of a wind power installation and which ensures secure and as inexpensive as possible transportation to the erection site of the wind power installation. A rotor blade hub for a rotor having at least one rotor blade, formed from at least two individual pieces.

A warning system that alerts motorists and pedestrians of the approaching emergency vehicles is disclosed. The system consists of the devices mounted on the emergency vehicles and stationary or portable devices. The stationary devices are mounted along the roads and each includes a receiver, a processor and a warning signal. The portable or wearable receivers are mounted inside the vehicles or carried by pedestrians. The system can operate by four different methods: a) Broadcasting the navigation data (coordinates, velocity and heading) from the emergency vehicle b) Using the directional transmitter mounted on the vehicle and directed forward c) Using the distance finder from the emergency vehicle to the fixed part d) Using the identification device which allows to detect and distinct the emergency vehicles from other traffic

The invention discloses a wastewater treatment method based on hydrodynamic cavitation. A coagulant is added to wastewater firstly so that suspended particles in wastewater can be separated through precipitation, and then jet flow hydrodynamic cavitation treatment, rotational flow hydrodynamic cavitation treatment and perforated plate hydrodynamic cavitation treatment are conducted on wastewater in sequence cyclically while an oxidizing agent is added to wastewater. According to the method, by means of the three-level cavitation effect achieved through first-level jet flow, second-level rotational flow and third-level flow limiting, instantaneous high temperature and high pressure are generated for direct organic matter degradation, harmless degradation of organic pollutants hard to degrade in the conventional way is achieved, and the method is suitable for treatment of organic wastewater hard to degrade with small volume and high concentration in any occasions.

The invention provides an automatic guiding vehicle global route planning method applicable to a logistics warehousing system. The method includes the steps of creating an environmental map accordingto environmental information; conducting noise removal, region planning and expansion treatment on the created environmental map; on the basis of the environmental map, obtaining the coordinate of a starting point n0 and the coordinate of a target point nt and conducting global route planning according to an optimized route cost function. According to the provided automatic guiding vehicle globalroute planning method, the optimized route cost function is adopted, a cornering factor (such as cornering tendency, cornering amplitude and running speed) and a barrier distance factor are taken intoaccount, and after the two factors are added, the sensitivity of an heuristic evaluation function on cornering and the distance between an automatic guiding vehicle and barriers is improved; the cornering frequency is greatly reduced, and the distance between the vehicle and the barriers is increased; therefore, the cornering frequency of a planned global route is decreased, and the automatic guiding vehicle is prevented from advancing close to the barriers.

The invention relates to a liquid continuous slag-removal fixed bed gasification furnace and a gasification method thereof, the liquid continuous slag-removal fixed bed gasification furnace is characterized in that: the liquid continuous slag-removal fixed bed gasification furnace from top to bottom in turn comprises a raw material bin, a material lock hopper, a furnace body, a plurality of gasification agent nozzles, a slag-removal device, a molten slag quenching chamber and a slag lock; the raw material bin is funnel-shaped, the lower end of the raw material bin is in fastening connection with the upper end of the raw material lock hopper; the raw material lock hopper is in fastening connection with an upper end port of the furnace body, the upper part of the furnace body is provided with a crude gas outlet, the furnace body inner wall located below the crude gas outlet is provided with a layer of furnace lining; the plurality of gasification agent nozzles are in fastening connection with the lower part of the furnace body and are arranged uniformly along the circumferential direction of the furnace body, the outlet of each gasification agent nozzle passes through the furnace body furnace wall and the furnace lining and extends into the furnace body; the slag-removal device is installed in the furnace body located below the furnace lining, the lower end of the furnace body is in fastening connection with the upper end of the molten slag quenching chamber, and the lower end of the molten slag quenching chamber is in fastening connection with the upper end of the slag lock. The gasification agent nozzles adopt a single channel structure only conveying a gasifying agent, the service life of the gasification agent nozzles is improved, and an overflow type slag pool can effectively ensure the smooth slag removal, and improves the operation efficiency of the fixed bed molten slag gasification furnace.