36results about How to "Reduce the number of shutdowns" patented technology

The invention discloses firm can plastic and a preparation method thereof. The firm can plastic comprises the following components in percentage by mass: 80 to 90 percent of a mixture of silicon carbide and mullite, 2 to 12 percent of silicon-containing micropowder of which the particle size is less than 2,200 meshes and 8 to 18 percent of low-temperature agglutinant, wherein the silicon carbide accounts for 5 to 15 percent of the mixture and the mullite accounts for 85 to 95 percent of the mixture. The preparation method comprises the following specific steps of: sequentially mixing for the first time, bundling, mixing for the second time, extruding, blanking and packing by taking the mullite and silicon carbide as a matrix material, and phosphoric acid and aluminium phosphate as a bonding agent. The firm can plastic has the advantages of effectively prolonging the service life of a refractory material, effectively improving the reliability of the refractory material, reducing the consumption and blowing out times of the refractory material, being used under the working condition of a dry coke quenching furnace, increasing the economic benefit and saving resources, along with high wear resistance and high compressive strength and compactness at normal temperature. The preparation method has the advantages of capability of improving the quality of the product, simple process and easy operation.

The invention relates to a process for treating garbage percolate, in particular to a process for spraying and treating percolate and aims to provide a reliable and efficient garbage percolate treatment method for spraying the garbage percolate for burning treatment. The garbage percolate can be prevented from polluting the environment and the pollution problem can be solved completely. In order to fulfill the aim, the process for spraying and treating the percolate is provided and comprises the following steps of: collecting the percolate; filtering the percolate; and spraying the percolate. A technical process for spraying, burning and treating the percolate is simple and is convenient to operate. Stock garbage percolate can be decomposed fully or concentrated solution produced in other treatment modes can be treated simultaneously and secondary pollution is avoided; and compared with other treatment modes, the process has low construction, operation and maintenance costs, small floor area and high automatic control degree and is convenient to operate.

The invention discloses a scale inhibitor for a boiler and a water supply pipeline. The scale inhibitor is prepared by the following steps: firstly, mixing starch, sodium humate and sodium lignin sulfonate evenly to obtain material A; mixing an organic carboxylic acid polymer with an organic phosphonic acid evenly, and preparing liquid B; dissolving the material A into pure water to prepare a water solution; dropwise adding hydrogen peroxide, and then reacting; dropwise adding the liquid B to the obtained reaction liquid dropwise adding a caustic soda solution to control the pH value, and then carrying out heating reaction; reacting and cooling to a room temperature, thus obtaining a product liquid scale inhibitor; and mixing the scale inhibitor with sodium carbonate or sodium carbonate and caustic soda evenly when in use. According to the scale inhibitor disclosed by the invention, high-temperature adsorption capacity and dispersion force of starch, sodium humate and sodium lignin sulfonate are improved through chemical modification; and the scale inhibitor has temperature tolerance and hardness resistance. When the scale inhibitor enters a high-temperature zone of a boiler body, the scale inhibiting performance for scale forming matters is relatively high; a water supply system of the boiler is prevented from being scaled; the scale inhibiting performance of a high-temperature system of the boiler is improved; and a strong guarantee is provided for safe operation of the boiler.

The invention relates to a method and device for producing a gasoline blended component with high octane number from refinery gas and light hydrocarbons, belonging to the technical field of aromatization of light hydrocarbons. The device comprises heating furnaces, reactors and an absorption-desorption tower which are serially connected, and is characterized in that: (1) two groups of the heating furnaces and the reactors that are parallelly connected are used for cycle operation; (2) in the reactor, the process conditions are as follows: the reaction temperature is 320-420 DEG C, the pressure is 0.8-2.0 MPa, the mass space velocity of 0.4-0.8 h<-1>, and the mass ratio of light hydrocarbon component to low-octane number gasoline is (30:70)-(10:90); (3) the light hydrocarbon component in the reactor is one of catalysis dry gas, coking dry gas and catalytic coking liquefied gas or a mixture thereof; and the low-octane number gasoline is one of ordinary/reduced pressure straight-run gasoline, field condensate oil, hydrogenated naphtha and cracked gasoline or any combination thereof; and (4) a stabilizer column and a heavy component eliminating tower are serially connected on the rear side of the absorption-desorption tower. The method and the device provided by the invention adopt two groups of the heating furnaces and the reactors that are parallelly connected for cycle operation, so as to realize continuous operation of reaction regeneration. In addition, the method and the device have strong adaptability and low energy consumption, and can directly remove part of the heavy components in the gasoline component so as to reduce the dry point of the gasoline product. During regeneration, the suction pressure regeneration combined process is used, so as to greatly shorten the coking time.

The invention relates to an emergency blowout control method for a large slab heating furnace. The emergency blowout control and alarm of the slab heating furnace is realized by the steps of reasonably selecting automatic blowout conditions and technological parameters, setting a blowout interlocking plant and a movement time sequence, changing the control mode for the coal gas control valve, adding a sound alarm for the low-pressure blowout alarm signal of coal gas, air and instrument air in the blowout procedure, and popping up an alarm picture. The invention has obvious effect on the heating furnaces of hot-strip 1700 mm and 1780 mm production lines. Even when coal-gas low pressure, combustion-fan power-fail, instrument-air low pressure, evaporation cooling system power-cut and other faults occur, no safety or equipment accident happens. Thus, the invention greatly reduces the frequency and time of heating furnace blowout and creates favorable conditions for smooth steel rolling production and yield enhancement.

The invention discloses a cross mixed flow superheater. A superheater pipe screen comprises two sets of near center pipe screens and two sets of far center pipe screens separately arranged in a boilerin the boiler width direction; the two sets of near center pipe screens and the two sets of far center pipe screens are both connected with a superheater inlet header and a superheater outlet header;the near center pipe screens and the far center pipe screens approaching each other are connected through uniform temperature pipes; and near center pipe screen return headers with higher temperatures at the middle part of a hearth and far center pipe screen return headers with lower temperatures on two sides of the hearth are across connected, so that steam flows from the near center pipe screens to the far center pipe screens or from the far center pipe screens to the near center pipe screens for mixed flowing and mixed heating. The steam temperature of superheater pipe screen outlets separately arranged in the boiler width direction reaches the same parameters, so that the working medium heat deviation caused by different arrangement position temperature fields can be effectively eliminated, the wall temperature of superheated pipe screens in high-temperature areas is lowered, and the high-temperature corrosion in the areas is relieved and improved.

The invention relates to a blast furnace reducing tuyere short set which comprises a short set body provided with an air inlet end and an air outlet end, wherein the short set is internally provided with an air flue, a valve cavity is arranged between the middle of the short set body and the air outlet end, the air flue expands towards two opposite radial directions of the short set body simultaneously so as to form the valve cavity, the valve cavity is internally provided with a pair of throttle cores, when the pair of throttle cores is at a radial approaching position, the air flue is at the throttle state that a circulation surface is locally covered, when the pair of throttle cores is at a radial separation position, the air flue is at an opening state that the circulation surface is completely opened, and the valve cavity is provided with two control holes capable of controlling the throttle core to move; and the short set is also provided with a cooling channel for cooling the short set. After the structure of the buffer precooling slag liquid pool is adopted, the internal diameter of the tuyere short set can be adjusted in the production process of the blast furnace according to the furnace condition, and blowing-in speed can be improved in real time according to needs under the condition that the constant blowing-in pressure is maintained.

The invention discloses a vehicle-mounted air conditioner as well as a low power consumption standby method and circuit thereof. The vehicle-mounted air conditioner comprises an indoor unit standby circuit and a power supply circuit used for providing standby voltage to the indoor unit standby circuit to control the standby of an indoor unit, wherein the power supply circuit comprises a boosting circuit used for performing boosting adjustment on an input power supply at a preset switching frequency. The low power consumption standby method of the vehicle-mounted air conditioner comprises the following steps that a standby mode of the vehicle-mounted air conditioner is monitored; and when the vehicle-mounted air conditioner enters the standby mode, the boosting circuit is controlled to stopworking after working for first preset time according to the preset switching frequency, and restart to work after intermittently resting for second preset time. According to the vehicle-mounted airconditioner as well as the low power consumption standby method and circuit thereof, the standby power consumption of the vehicle-mounted air conditioner is reduced.

The invention relates to a pyrolysis furnace with wear-resistant radiation pipes. The pyrolysis furnace comprises pipe caps, the radiation pipes and a mounting part, and the horizontal and vertical distances between the two radiation pipes arranged in the pyrolysis furnace are identical; each of the pipe caps has a triangular cross section and comprises an arc-shaped plate part and vertical plateparts arranged on the two sides of the arc-shaped plate part; and the vertical plate parts are fixedly connected with the upper part of the corresponding radiation pipe through rectangular sheets, sothat a falling material is prevented from directly impacting the radiation pipe, and the falling-off of the material is facilitated. The pyrolysis furnace provided by the invention has the beneficialeffects that the service lives of the radiation pipes are prolonged, the maintenance expense of the pyrolysis furnace is reduced, the frequency of shutdowns of the pyrolysis furnace is reduced in theoperation process, the potential safety hazards and the economic losses caused by radiation pipe wear are reduced, the safe and normal operation of the regenerative rapid pyrolysis furnace is ensured,and the operation cycle of the pyrolysis furnace is prolonged.

The invention provides an integral type water cooling bottom part ring of a combination holder of a closed submerged arc furnace and a process for producing the same. The bottom part ring consists of an inner side stainless steel ring-shaped plate (1), a water cooling protection sleeve insulated plate ring plate (2), a semi-circular ring body (3), a contact element protection support ring plate (4) and a clapboard (6), wherein the inner side stainless steel ring-shaped plate(1) is in welding connection with the stainless steel ring plate (2) and the contact element protection support ring plate (4); and the circular ring body (3) is in welding connection with the ring plate (2) and the contact element protection support ring plate (4) so as to form the integral type water cooling bottom part ring. The bottom part ring has the advantages of solving the problems of water leakage due to frequent poking and frequent shut-down of a furnace for exchange, meeting the operating requirements in the production of the combination holder of the closed calcium carbide furnace, effectively improving the quality of an electrode pole, greatly improving the use effect of the holder, fully meeting the requirements on protection and guide of an electrode pole electric conduction device, and avoiding water leakage phenomenon occurring while in use, along with better economical efficiency; moreover, the bottom part ring also has the advantages of greatly prolonging the service life and greatly lowering the frequency of the shut-down of the furnace due to the fault of the bottom part ring.

The invention relates to a combustor of a large rotating furnace, belonging to a component of a smelting furnace. The combustor of the large rotating furnace mainly comprises an air blower (1), an air blower motor (3) and a cylindrical high titanium steel burner nozzle (2) , wherein an air tube (4) is additionally arranged between an air outlet of the air blower (1) and the cylindrical high titanium steel burner nozzle (2) so as to lengthen a distance between the centre of the air blower motor (3) and a fire port (5). By using the combustor of the large rotating furnace, the air blaster motor can be protected against high temperature damage, the service life of the air blaster motor is prolonged, and the production cost is reduced.

The invention relates to a horizontal water boiler with ash holes. The upper portion of the boiler is provided with a boiler shell. The downtake tubes are connected with a front header box, a rear header box and a side header box. The front header box is connected with a front arch and a front shed tube to extend into the boiler shell. The rear header box is connected with a rear arch to extend into the boiler shell. The side header box is connected with a side water-cooled wall. Side water-cooled wall tubes are crossed to extent into the boiler shell. The boiler shell is arranged on the outerportion of a boiler hearth. The horizontal water boiler is characterized in that the front arch comprises a refractory slab formed by wrapping water tubes through refractory cement, and a slab body is provided with the multiple ash holes. Under the condition that the original height remains unchanged, the rear arch is additionally arranged to increase the height of the boiler hearth in disguise,the combustion effect is good, and the thermal efficiency is high. The side water-cooled wall tubes are crossed to extent into the boiler shell. The boiler shell is arranged outside the boiler hearth,so that the boiler shell does not make direct contact with flames and high-temperature flue gas. The defect of swelling of the boiler shell is overcome fundamentally. The heat transfer effect is improved. The service life of the boiler shell is prolonged. The boiler is internally provided with a smoke chamber, and the defect that a heat insulation layer falls off easily and leaks air is overcome.Through arrangement the front arch and the ash holes, ash removing is convenient, and the boiler shutdown frequency is reduced.

The invention relates to a heat accumulation type rapid pyrolysis furnace with wear-resisting radiation tubes. The heat accumulation type rapid pyrolysis furnace comprises a pipe cap, a mounting partand the radiation tubes, wherein the horizontal and vertical distances between each two radiation tubes arranged in the pyrolysis furnace are the same; the pipe cap is an arc-shaped plate with an ovalcross section; the mounting part is arranged on the radiation tubes; the arc-shaped plate is arranged on the mounting part so that the pipe cap is located above the radiation tubes, and a condition that the radiation tubes are directly impacted by materials is avoided. According to the heat accumulation type rapid pyrolysis furnace provided by the invention, a condition that tube walls of the radiation tubes are directly washed is avoided, so that the radiation tubes are not damaged and abraded and the service life of the radiation tubes is prolonged; the overhauling cost of the pyrolysis furnace is reduced, and the number of times of blowing down the pyrolysis furnace in an operation process is reduced; the potential safety hazards and the economic loss, caused by abrasion of the radiation tubes, are reduced; safe and normal operation of the heat accumulation type rapid pyrolysis furnace is ensured and the operation cycle of the pyrolysis furnace is prolonged.

The invention discloses a slag remover which comprises a chain-slat conveyer box body, a water seal and a remover body, wherein a slag crusher is mounted on the remover body; a dust falling port is formed in the lower part of the remover body; the water seal is arranged inside the chain-slat conveyer box body; and the dust falling port is formed in the water seal. The slag remover has the advantages that the faults are relatively reduced, the maintenance intensity is reduced, the shutdown frequency is reduced, the load of a motor is reduced, the phenomenon of motor burning is basically eliminated, the dust removal speed is increased, and the service life is prolonged.