31results about How to "Promote natural circulation" patented technology

The invention discloses a nuclear power plant passive reactor cavity water injection system. The nuclear power plant passive reactor cavity water injection system comprises a water injection tank, a water injection pipeline, an electric isolation valve and a self-actuated flow control valve assembly, wherein the water injection tank is used for storing water, and injecting water into a reactor cavity; one end of the water injection pipeline is connected with the bottom of the water injection tank, and the other end is connected with the reactor cavity; the water injection pipeline is used forinjecting water in the water injection tank into the reactor cavity; the electric isolation valve is arranged on the water injection pipeline, and is used for controlling the communication or isolation between the water injection tank and the reactor cavity; the self-actuated flow control valve assembly is arranged on the water injection pipeline between the electric isolation valve and the reactor cavity, takes potential energy of the water in the water injection tank as a power source, and is used for keeping water injection flow of the water injection tank in an approximately-stable state.Compared with the prior art, the nuclear power plant passive reactor cavity water injection system has the advantages of simple structure, convenience in arrangement, stable flow control, low requirement on water injection tank distribution, saving in water resources, and capability of improving the running safety of nuclear power plants.

The invention discloses a hazardous waste incineration line flue gas purification treatment system, which comprises a quench tower, a cyclone dust collector, a dry deacidification tower, a filter bag, a wet washing tower, an alkali liquor neutralizing tower, a steam heater and a chimney. The outer wall of the quench tower is fixedly connected with a quench tower spray gun cooling water ring pipe, a quench tower spray gun compressed air ring pipe and a quench tower spray gun protection air ring pipe, the upper end of the quench tower is provided with a quench tower flue gas inlet, and the lower end of the quench tower is provided with a spray gun compressed air inlet pipe and a quench tower spray gun protection fan. According to the hazardous waste incineration line flue gas purification treatment system, the problem that flue gas purification treatment is not thorough is solved, the process is more reasonable, more convenient and more effective, the flue gas purification treatment effect is greatly improved, and finally the flue gas reaches the national flue gas emission standard, and after flue gas generated after incineration is purified by the flue gas treatment system, the concentration meets the emission requirement, and a better use prospect is brought.

The invention discloses a method for remediating soil by using thermal desorption and a microbial technology. The soil is remediated by utilizing a thermal desorption soil remediating system, and the method comprises the following steps: firstly, preheating contaminated soil by adopting a preheating device, then, heating the preheated contaminated soil by adopting a heating device to separate contaminants in the soil, and finally, recovering heat of the soil from which the contaminants are separated by adopting a heat recovery device; remediating the soil by utilizing the microbial technology; applying organic fertilizer to the soil treated by thermal desorption per mu, and plowing the organic fertilizer under the soil by a rotary cultivator; then, sprinkling the soil to keep soil humidity, and then, evenly spraying microbial soil remediating inoculant; and evenly spraying the microbial soil remediating inoculant once after two months to finish soil remediation after three months. According to the method disclosed by the invention, by adopting thermal desorption and the microbial technology, a breeding condition in favor of microbial strains is created by utilizing a physical and biological method, and the soil is remediated in manner of nature, return and equilibrium.

The light emitting diode mainly consists of light-emitting dies and a metal bed for mounting the die. The metal bed comprises at least one hollow high thermal conductivity metal tube. At least two light emitting diode dies are fixed on one end or center of said metal tube by welding said dies on the wall of said metal tube with gold-tin alloy, or bonding the dies on the wall of said metal tube with high thermal conduction silver paste or organic and inorganic adhesive. The said metal tube has fins or threaded heat-delivery surface. The lamp of light-emitting diode has at least one reflector with a reflecting surface made into parabolic shape mounted on said metal tube.

The invention discloses a heat pipe EGR cooler, mainly comprising a shell and a heat pipe, wherein, two ends of the shell are provided with a waste gas inlet and a waste gas outlet respectively; and the heat pipe consists of a heating section, a steam pipe, a condensing section and a condensation pipe which are communicated from beginning to end. The invention is characterized in that the heating section is arranged in the shell. The principle of the invention is to adopt the heat pipe technology to cool waste gas, which can ensure that the temperature of the waste gas is lower and can effectively relieve the influence of the waste gas to the power per liter of the engine on the premise of the same recirculation waste gas amount. Meanwhile, the heat pipe EGR cooler can effectively reduce the negative effect of the reduced heat exchanging efficiency caused by caking, and can effectively avoid a leaking occasion of welding lines of flange faces between the shell and the waste gas inlet and the waste gas outlet.

The invention relates to a low-flow-resistance heat exchanger for a natural circulation system. The low-flow-resistance heat exchanger comprises an inlet tube box (2), an inlet tube plate (3), a heat transfer tube bundle, an inlet supporting plate, an outlet supporting plate, an outlet tube plate (6) and an outlet tube box (7). The heat transfer tube bundle is divided into an inlet shrinkage region, a heat exchange region and an outlet shrinkage region. The heat exchanger is a shell-free type heat exchanger. Small-diameter tubes are adopted as heat transfer tubes (4) in the heat transfer tube bundle. The inlet shrinkage region and the outlet shrinkage region of the heat transfer tube bundle incline downwards. The heat exchange region of the heat transfer tube bundle is horizontally arranged basically, no local high point or air accumulation is generated in the tube pass, low flow resistance is achieved, and the structure is compact.

The invention discloses a passive waste heat removal hot trap device for inhibiting the influence of the marine environment. The device comprises a cooling water cabin composed of an upper cooling water cabin split body and a lower water cabin split body, the upper cooling water cabin split body is arranged on the lower cooling water cabin split body, and a steam discharge port communicated with the atmospheric environment is arranged in the top of the upper cooling water cabin split body; the bottom of the upper cooling water cabin split body is communicated with the top of the lower coolingwater cabin split body through a plurality of overflow openings arranged at intervals; backflow pipelines are connected to two sides of the bottom of the upper cooling water tank split body, and the backflow pipelines extend towards the lower cooling water tank split body and are communicated with the inner bottom of the lower cooling water tank split body; and a passive waste heat removal cooleris arranged in the lower cooling water tank split body and is submerged in cooling water in the lower cooling water tank split body. The exposure of the passive waste heat removal cooler, caused by sloshing of a liquid in the cooling water cabin due to marine environments such as swing, is avoided, so stable operation of the passive waste heat removal system is facilitated.

The invention discloses a horizontal jacket water tank, which comprises an outer shell (1), a medium circulation port and an inner lining jacket (2) for heat exchange, wherein the outer shell is provided with a medium pouring port (3) and a medium overflow port (4); the inner lining jacket (2) consists of an outer layer cylinder body and an inner layer cylinder body; the space in the inner liningjacket (2) serves as a heat exchange space; one end of the inner lining jacket (2) is fixedly welded with an expansion space (5); and a through hole (6) with a diameter of 6 mm is formed between the expansion space and the heat exchange space. As for the structure adopted by the horizontal jacket water tank, the damage caused by volume expansion of the medium does not directly act on the inner lining jacket to lighten the pressure on the inner lining jacket and eliminate potential safety hazards; and a liquid inlet of the medium enters the middle part of the inner lining jacket through a heat-conducting drainage tube to form a height difference with a liquid outlet so as to contribute to natural circulation and enhance the heat exchange effect of a water tank system.

The storage of a liquid is usually static in a nuclear power plant; and a storage box only needs to satisfy leak tightness, homoiothermy and accessibility. If stirring and mixing of the stored liquid can be realized in a certain special application occasions, and especially under an accident condition, the preset function of the stored liquid can be strengthened greatly; but the power needed by the stirring and mixing function is usually difficult to obtain in time. The invention belongs to a liquid storage box design, and particularly relates to a liquid storage box for realizing internal fluid driving by utilizing a temperature difference power source. Multiple groups of temperature difference power sources are arranged on a wall body, a top cover and a bottom plate of the storage box; and under the accident condition of the nuclear power plant, the temperature difference power sources enable a reactor to release heat abnormally and change the heat into an electric energy so as to drive a shielding pump and a draught fan both integrated in the storage box to stir and mix the stored liquid.

The storage of a liquid is usually static in a nuclear power plant; and a storage box only needs to satisfy leak tightness, homoiothermy and accessibility. If stirring and mixing of the stored liquid can be realized in a certain special application occasions, and especially under an accident condition, the preset function of the stored liquid can be strengthened greatly; but the power needed by the stirring and mixing function is usually difficult to obtain in time. The invention belongs to a liquid storage box design, and particularly relates to a liquid storage box for realizing internal fluid driving by utilizing a temperature difference power source. Multiple groups of temperature difference power sources are arranged on a wall body, a top cover and a bottom plate of the storage box; and under the accident condition of the nuclear power plant, the temperature difference power sources enable a reactor to release heat abnormally and change the heat into an electric energy so as to drive a shielding pump and a draught fan both integrated in the storage box to stir and mix the stored liquid.

The invention belongs to the technical field of soil improvement, and discloses a method for removing heavy metal cadmium in soil of agricultural equipment and overcoming successive cropping obstacle. The method comprises: carrying out heavy metal content and component analysis on a soil sample; preparing a soil remediation agent based on the content of heavy metals in the soil and a soil component analysis result; applying the prepared soil remediation agent to the soil to be remediated, and subjecting the soil to rotary tillage, uniform mixing and leveling; irrigating the soil by using pre-treated underground water; and sowing restoration plants in the irrigated soil, and harvesting the plants. Environment-friendly materials such as activated carbon are combined with remediation plants for soil remediation, natural circulation of farmland nutrients can be promoted, the purpose of treating soil environmental pollution is achieved, source control over agricultural product safety is achieved, the quality safety level of agricultural products is comprehensively improved, the exchangeable amount of cadmium ions is reduced, the cadmium ions are stabilized, the form of heavy metal cadmium in facility agriculture soil is changed, the effectiveness of the heavy metal cadmium in the soil is reduced, and cadmium absorption of crops is reduced.

The present disclosure provides a supercritical fluid gasification system. In some embodiments, the system includes a reactor having a reactor shell including sidewalls that extend between a top reactor cover and a bottom reactor cover, where the sidewalls, the top cover, and the bottom cover enclosing a reactor shell channel. In some embodiments, the reactor includes a thermal shield positioned within the reactor shell channel, the thermal shield having sidewalls that extend between a top thermal shield cover and a bottom thermal shield cover, where the sidewalls, the top thermal shield cover, and the bottom thermal shield cover enclosing a thermal shield channel. In some embodiments, the reactor includes a fluid feed supply conduit in fluid communication with the thermal shield channel, a supercritical fluid conduit in fluid communication with the thermal shield channel, and a product conduit in fluid communication with the thermal shield channel.

The invention discloses a microbiological method ion exchange soil remediation technology. The microbiological method ion exchange soil remediation technology is characterized in that a soil remediation agent is obtained through the steps such as compounding of microbial flora, compounding of a stable complexing form chemical solution through acid-base neutralization, and preparation of the soil remediation agent. According to the prepared soil remediation agent, acid and alkali ions and microbiological adjustment act on soil jointly, growth of harmful bacteria in the soil can be effectively restrained, meanwhile, microbial bacterial colony in the soil is remediated, thus a good soil ecological environment is formed for the soil so as to facilitate natural circulation of water, fertilizer,air and heat, and the effect that the soil is free of hardening or desertification is ensured. In addition, the heavy metal content in the soil can be lowered, and the soil remediation ability is enhanced.

The invention belongs to the technical field of electromechanical equipment, and particularly discloses a waterproof and dustproof electromechanical equipment protective shell. The shell comprises anouter box body and an inner box body, wherein the outer box body comprises a top cover, side plates and a bottom plate; the side plates include a front side plate, a left side plate, a right side plate and a rear side plate; the left side plate, the right side plate or the rear side plate is provided with a through hole; an air inlet mechanism is arranged at the through hole; the air inlet mechanism comprises a ventilating plate, a dustproof plate and a fan which are sequentially and horizontally arranged from outside to inside; an air inlet is formed in the ventilating plate; the air inlet isinclined upwards; an air outlet is further formed in the outer box body; a water outlet is formed in the bottom plate; and the inner box body is a metal box. The protective shell is divided into theinner box body and the outer box body; the inner box body is the metal box, so that heat dissipation is facilitated; the air inlet mechanism is arranged on the outer box body, and a ventilation gap isformed between the inner box body and the outer box body, so that the flowability of air is conveniently improved, and the heat dissipation effect is improved; the air inlet is inclined upwards, so that rainwater does not easily enter the box; and the dustproof plate is arranged, so that the waterproof and dustproof effects are improved.

The invention provides an intermediate loop flow control method, a control device and a control system for a low-temperature nuclear heating reactor unit. The intermediate loop flow control method includes the following steps: obtaining the operation mode of the low-temperature nuclear heating reactor unit, the set value and measured value of the core outlet temperature, and the set value and measured value of the main steam pressure; and according to the In the above operation mode, based on the set value and measured value of the core outlet temperature and / or the set value and measured value of the main steam pressure, the intermediate loop flow set value is determined, so that according to the intermediate loop flow setting Fixed value to control the speed of the intermediate circuit pump.

Inside the boiler chamber between the upper and the lower headers, there is one multiple-pipe heat generator connected to the upper and the lower headers. The connected water tank is connected to the upper header through hot water pipe and to the lower header through cold water pipe. In boiler region, there are several air return baffles to form several communicated fire areas with fire door on the lower wall. The present invention can raise heat efficiency obviously, reduce maintenance and prolong the service life of the boiler.

A soundproof vent window with a combined silencing box comprises a sliding window and the silencing box, wherein the silencing box is formed by an outer box body and a combined silencing body; the outer box body is formed by an outer glass push and pull window sash, an inner glass fixing window sash and a frame for connecting the outer glass push and pull window sash and the inner glass fixing window sash; the outer glass push and pull window sash becomes a wind inlet under an opening state; the combined silencing body comprises a bottom plate and two groups of silencing material plates; the two groups of silencing material plates arranged on the bottom plate are crossed in a cross shape to form a silencing wind path, thus achieving the soundproof and venting effects; all parts of the combined silencing body are connected into a whole and the combined silencing body can be drawn from the bottom of the outer box body. The soundproof vent window with the combined silencing box is simple and compact in structure, widely applicable and convenient to clean, can meet the needs of people on lighting, venting and denoising at the same time, and can effectively isolate the noise generated by traffic, industry, building construction and the like around a building.

The invention provides passive containment auxiliary cooling system and method. The containment includes an inner containment and an outer containment. The cooling system includes a plurality of spraynozzles, a spray pipeline, a distributing device, and a water supply device. One end of the spray pipeline extends to below the top outlet of the outer containment while the other end of same is connected to the water supply device. The spray nozzles are arranged on the spray pipeline below the top outlet of the outer containment and are arranged in the direction that cooling water sprayed from the nozzles fall on the center of the dome of the inner containment. The distributing device is arranged on the top of the inner containment and used for uniformly distributing the cooling water, sprayed from the nozzles, to the top surface of the inner containment so as to form a cooling water film. The method and system can effectively solve the defect that the containment can only be cooled by air passively and can improve the cooling capacity of the cooling system, thereby enhancing security of a nuclear power plant.

The invention discloses an anti-solidification large-temperature-difference LNG cold energy recovery heat exchanger. The recovery heat exchanger comprises a heat exchanger cavity, an intermediate medium is injected into the cavity, the upper portion of the cavity is an intermediate medium gas phase area, the lower portion of the cavity is an intermediate medium liquid phase area, an LNG coil pipe and an NG coil pipe are arranged in the gas phase area, and a heating medium coil pipe is arranged in the liquid phase area; a baffle is arranged on the upper portion of the heat exchanger and divides the upper portion of the heat exchanger into an LNG heating area and an NG heating area, the tops of the LNG heating area and the NG heating area are communicated, an LNG coil pipe is arranged in the LNG heating area, an NG coil pipe is arranged in the NG heating area, and the top of the LNG coil pipe is in communication with the bottom of the NG coil pipe; and a heat insulation baffle is arranged on the lower portion of the heat exchanger cavity and connected to a baffle, the lower portion of the heat exchanger is divided into a mixed preheating area and an evaporation area through the heat insulation baffle, the two areas are communicated at the bottom, a low-temperature heating medium coil is arranged in the mixed preheating area, and a high-temperature heating medium coil is arranged in the evaporation area. According to the recovery heat exchanger, solidification-free efficient recycling of LNG cold energy under the large temperature difference can be achieved, and a secondary refrigerant needed by ice making or air conditioning and the like can be directly prepared.

The invention discloses a passive natural circulation intensifying system and method for a liquid metal cooled reactor after flow loss, and belongs to a safety protection system of the liquid metal cooled reactor. The passive natural circulation intensifying system comprises a high-pressure gas storage tank, a throttle valve, and a vertical pipeline and an inverted U-shaped pipeline which are positioned in a reactor. According to the system and the method disclosed by the invention, due to the connection design of the pipelines, when a main pump loses drive force, the liquid metal cooled pool type rector automatically triggers high-pressure gas to be injected into the upper part of a reactor core by a high-pressure injection tank without any signal transfer; and the injected gas pushes a coolant at an exit of the reactor core to flow upwards, and the natural circulation after a flow-loss accident is intensified. According to the system and the method disclosed by the invention, the automatic start of the reactor can be realized after the forced circulation is lost, and the natural circular flow of cold and hot pool loops is intensified so as to guarantee the effective cooling of the reactor core.

The invention relates to a low-flow-resistance heat exchanger for a natural circulation system. The low-flow-resistance heat exchanger comprises an inlet tube box (2), an inlet tube plate (3), a heat transfer tube bundle, an inlet supporting plate, an outlet supporting plate, an outlet tube plate (6) and an outlet tube box (7). The heat transfer tube bundle is divided into an inlet shrinkage region, a heat exchange region and an outlet shrinkage region. The heat exchanger is a shell-free type heat exchanger. Small-diameter tubes are adopted as heat transfer tubes (4) in the heat transfer tube bundle. The inlet shrinkage region and the outlet shrinkage region of the heat transfer tube bundle incline downwards. The heat exchange region of the heat transfer tube bundle is horizontally arranged basically, no local high point or air accumulation is generated in the tube pass, low flow resistance is achieved, and the structure is compact.