35 results about "Subsidence trough" patented technology

The invention belongs to the technical field of entrained-flow coal gasification, and provides an entrained-flow coal gasification black ash water settling and dispersing system and a black ash watersettling method thereof in order to improve the settling efficiency of entrained-flow coal gasification black water. A primary flocculant adding device is that a flocculation tank I is connected witha mixer I through a flocculation pump I; a secondary flocculant adding device is that a flocculation tank II is connected with a mixer II through a flocculation pump II; the mixer I and the mixer II are connected with a black water pipeline of a settling tank, the bottom of the settling tank is connected with a drainage pump, and the top of the settling tank is connected with the water inlet of abaffling clarifier through an overflow weir; the bottom of the baffle clarifier is provided with a drain outlet, the top is provided with a drain pipe, and the end of the drain pipe is connected withan ash water tank; the baffle clarifier and the ash water tank are connected with a dispersant tank through a dispersant pump. By adding different kinds of flocculants in the two-stage device, the purpose of reducing the total dosage of chemicals on the one hand and better settling treatment effect on the black water on the other hand can be achieved.

The invention discloses an automatic continuous dosing system for treating coal gasification black water. The system comprises a settling tank, a grey water tank and a dissolving tank, the settling tank is connected with a black water pipe, a flocculating agent dosing branch pipe is arranged on the black water pipe, the flocculating agent dosing branch pipe is connected with the dissolving tank, aconnecting pipe is arranged between the settling tank and the grey water tank, the grey water tank is connected with a dispersing agent dosing pipe, the bottom of the grey water tank is provided witha purified water pipe, and the purified water pipe is provided with two branches, namely an outer water drainage pipe and a recycled water pipe. In actual use, flow monitoring and online data signalanalysis are added to the whole dosing system, and detection signals are transmitted to a central control room, so that flow regulation and continuous and automatic dosing of a medicament can be ensured, and the treated water quality is ensured to meet the requirements of discharge and gasification cyclic utilization.

The invention provides a crushed coal pressurized gasification gas-water separation and recycling system and method, and belongs to the field of coal gas separation and recycling. According to the invention, different types of coal gas water are respectively separated and recycled, so that the whole system is small in occupied area, low in investment, low in operation cost, short in treatment flow, less in equipment, less in pollutant discharge points and not easy to cause environmental pollution. By arranging a medium-pressure flash evaporator, a vacuum flash evaporator, a vacuum flash separator, an ammonia distillation tower and other devices and arranging a settling tank and the top of a coal gas water tank to be connected with an inert gas pipeline in a sealed mode, and the whole system and the separation and recycling process keep micro-positive-pressure operation greater than 0.2 kPa, thereby being capable of guaranteeing that VOCs and odor exhausted from the system can be treated in a centralized mode. The coal gas water tank is connected with a second ammonia distillation tower, so that coal gas water going to biochemical treatment equipment can be completely or partially subjected to ammonia distillation through the ammonia distillation tower, and the problem that a biochemical system is difficult to operate stably due to change of different feed coals is solved.

The invention provides a crushed coal pressurized gasification gas-water separation and recycling system and method, and belongs to the field of coal gas separation and recycling. According to the invention, different types of coal gas water are respectively separated and recycled, so that the whole system is small in occupied area, low in investment, low in operation cost, short in treatment flow, less in equipment, less in pollutant discharge points and not easy to cause environmental pollution. By arranging a medium-pressure flash evaporator, a vacuum flash evaporator, a vacuum flash separator, an ammonia distillation tower and the like and arranging a settling tank and the top of a coal gas water tank to be connected with an inert gas pipeline, and the whole system and the separation and recycling process keep micro-positive pressure operation greater than 0.2 kPa, thereby being capable of guaranteeing that VOCs and odor exhausted from the system can be treated in a centralized mode. The coal gas water treated by a deacidification tower is fed into the ammonia distillation tower, so that the coal gas water going to the biochemical treatment equipment can be subjected to ammoniadistillation, the ammonia content in the coal gas water going to the biochemical treatment equipment can be reduced, and the problem that a biochemical system is difficult to operate stably due to change of different feed coals is solved.

The invention provides a simple crushed coal pressurized gasification gas-water separation and recycling system and method, and belongs to the field of coal gas separation and recycling. According tothe invention, different types of coal gas water are respectively separated and recycled, so that the whole system is small in occupied area, low in investment, low in operation cost, short in treatment flow, less in equipment, less in pollutant discharge points and not easy to cause environmental pollution. By arranging a medium-pressure flash evaporator, a vacuum flash evaporator, a vacuum flashseparator, an ammonia distillation tower and other devices and arranging a settling tank and the top of a coal gas water tank to be connected with an inert gas pipeline in a sealed mode, the whole system and the separation and recycling process keep micro-positive-pressure operation greater than 0.2 kPa, thereby being capable of guaranteeing that VOCs and odor exhausted from the system can be treated in a centralized mode. The whole system uses less and simple equipment, so that the whole system is safe and stable in operation, and the gas water treatment cost can be effectively reduced.

The invention provides a crushed coal pressurized gasification gas-water separation and recycling system and method, and belongs to the field of gas separation and recycling. According to the invention, different types of coal gas water are respectively separated and recycled, so that the whole system is small in occupied area, low in investment, low in operation cost, short in treatment flow, less in equipment, less in pollutant discharge points and not easy to cause environmental pollution. By arranging a medium-pressure flash evaporator, a vacuum flash evaporator, a vacuum flash separator,an ammonia distillation tower and other devices and arranging a settling tank and the top of a coal gas water tank to be connected with an inert gas pipeline in a sealed mode, the whole system and theseparation and recycling process keep micro-positive-pressure operation larger than 0.2 kPa, and therefore it can be guaranteed that VOCs and odor exhausted from the system can be treated in a centralized mode.

The invention relates to a flash evaporation-sedimentation-fluidized bed separation combined purification method and device for coal gasification black water. The flash evaporation-sedimentation-fluidized bed separation combined purification method for the coal gasification black water comprises the following steps: (i) carrying out flash evaporation treatment on the coal gasification black water; (ii) feeding the coal gasification black water having been subjected to flash evaporation treatment into a sedimentation tank, conducting sedimentation and separating, feeding bottom concentrated suspended matters into a vacuum filter pressing system, and feeding a supernatant of the sedimentation tank, namely coal gasification ash water, into an ash water tank; (iii) pumping the coal gasification ash water out of the ash water tank, and sending the coal gasification ash water to a fluidized bed separator to deeply remove fine particles in the coal gasification ash water; (iv) sending the coal gasification ash water purified by the fluidized bed separator to a deaerator for deoxygenation; and (v) after the fluidized bed separator is operated for a period of time and a pressure difference is 0.3 MPa, mixing the coal gasification ash water and nitrogen, and reversely feeding the obtained mixture to regenerate a separation medium of the fluidized bed separator. The invention further provides the flash evaporation-sedimentation-fluidized bed separation combined purification device for coal gasification black water.

A gravitational settling tank including a pressure vessel which precipitates solid content contained in slurry in which coal and solvent are blended, and separates the solid-content concentrated liquid from the supernatant liquid, and a supply pipe which supplies the pressure vessel with the slurry. A main body part and a nozzle part which is connected on the downstream side of the main body part and extends horizontally are provided in the supply pipe. A plurality of holes are provided in the nozzle part. By virtue of this, agitation of the solid-content concentrated liquid which has settled in the bottom is inhibited.

The invention relates to a coal gasification ash water treatment process and equipment. Firstly, black water generated by coal gasification firstly enters a settling tank for coarse separation to achieve the purpose of removing most suspended matter, and clear liquid of the settling tank is pumped to electric flocculation integrated equipment by using an ash water pump for fine separation. Al<3+>or Fe<2+> obtained by ionizing of an iron plate or an aluminum plate and OH<-> generated by a cathode plate are complexed to generate a high-activity hydroxyl complex, suspended matter and calcium andmagnesium ions in the ash water are subjected to hardness removal treatment, meanwhile, the suspended matter in clarified liquid can be removed, the removal rate of the calcium and magnesium ions inthe ash water passing through the electric flocculation integrated equipment can reach 70% or above, and the removal rate of the suspended matter can reach 99% or more. Due to the fact that the waterquality of the ash water passing through the electric flocculation integrated equipment is improved, on one hand, the amount of discharged ash water can be reduced, and on the other hand, due to the fact that the hardness and the suspended matter of the ash water returned to the system are reduced, the risk of scaling of the equipment and pipelines can be reduced, and the operation safety of the device is improved.

The invention discloses a coal water slurry gasification system. The coal water slurry gasification system comprises a gasification furnace, a washing tower, an ash water tank, a sedimentation tank, afirst coal water slurry / black water heat exchanger and a second coal water slurry / black water heat exchanger; the gasification furnace, the washing tower, the ash water tank and the sedimentation tank are sequentially arranged and connected through pipelines; the black water input end of the first coal water slurry / black water heat exchanger is connected with the black water output ends of the gasification furnace and the washing tower; the black water input end of the second coal water slurry / black water heat exchanger is connected with the black water output end of the first coal water slurry / black water heat exchanger; the black water output end of the second coal water slurry / black water heat exchanger is connected with the black water input end of the sedimentation tank. The coal water slurry gasification system has the advantages that high-temperature black water from the gasification furnace and the washing tower preheats and heats coal water slurry through the second coal water slurry / black water heat exchanger and the first coal water slurry / black water heat exchanger for two-time heat exchange, no phase change exists, low-grade heat energy can be recovered, and the energy recovery efficiency is greatly improved; complex flashing systems are omitted, and the equipment investment cost is reduced.

The invention discloses a device and a method for producing synthetic gas by a multi-nozzle gasification furnace. The device sequentially comprises a normal-pressure pulverized coal storage tank, a lock hopper and a feeding tank. A buffer tank and a spiral conveyor are sequentially connected between a discharging pipe at the bottom of the feeding tank and a burner. The spiral conveyor is sequentially connected with the burner and a gasification furnace. The gasification furnace is respectively connected with a water scrubber and a slag breaker. The bottom of the slag breaker is connected with a slag lock hopper. The water scrubber is sequentially connected with a high-pressure flash tank and a vacuum flash tank. The vacuum flash tank is connected with a tilting pan filter, and the tilting pan filter is connected with a settling tank. The pulverized coal heat can be concentrated, the pulverized coal flow can be quantitatively controlled, the pulverized coal conveying amount is increased, meanwhile, the heat flux and the combustion temperature are higher, and the water carrying amount of synthetic gas is effectively reduced.

The invention discloses a comprehensive recycling process for gasification fine slag. The process comprises the following steps: firstly, high-solid-content black water of gasification fine slag is conveyed to a centrifugal machine from a settling tank through a settling tank underflow pump for solid-liquid separation, enters a wet ash conveying system after being discharged from the centrifugal machine, falls into a stirring bin and is stirred; then the ash is conveyed to a spiral feeder after passing through a hydraulic gate valve control outlet; and finally, after being pressurized by a wet ash conveying pump, the wet ash is conveyed to a composite coal slime pipeline and then is conveyed to a boiler for blending combustion and utilization; filtrate of the centrifugal machine flows into a filtrate tank by itself, and the filtrate in the filtrate tank is conveyed back to the settling tank by a filtrate pump through a pipeline. The process solves the problems of low utilization rate, high recovery cost and environmental pollution of the existing gasification fine slag. The horizontal spiral centrifugal machine and a coal slime pump are combined, feeding is conducted in a dense-phase area of the boiler, efficient and clean comprehensive recycling of gasification fine slag is achieved, and meanwhile low-nitrogen combustion of the boiler is achieved.

The invention belongs to the technical field of coal gasification of entrained-flow beds, and provides an entrained-flow bed coal gasification flashing noncondensable gas absorption and purification system and method in order to improve the environment, purify and treat noncondensable gas in the production and operation processes of coal gasification of an entrained-flow bed, and prevent environmental pollution. A vacuum flashing separation tank is connected with an absorption device through a vacuum pump; the bottom of the vacuum flashing separation tank is connected with a subsider, and thetop of the vacuum flashing separation tank is connected with the vacuum pump; the other end of the vacuum pump is connected with the absorption device; as for the absorption device, the bottom of an absorption tank is connected with the subsider, a level meter is mounted on the side wall of the lower part of the absorption tank, the top of the absorption tank is provided with a desalted water inlet, a caustic soda flake adding opening and a noncondensable gas inlet, and the side wall of the upper part of the absorption tank is provided with a noncondensable gas exhaust opening; and the noncondensable gas inlet is connected with an outlet of the vacuum pump through a gas inlet pipe, a pipe opening of the gas inlet pipe is inserted below the liquid surface in the absorption tank, a noncondensable gas discharging valve is arranged at the position, on the noncondensable gas inlet, of the gas inlet pipe, the gas inlet pipe extends outwards to be provided with a blow-down pipeline, and a noncondensable gas blow-down valve is arranged between the gas inlet pipe and the blow-down pipeline. The effect of removing unpleasant odors around a factory is achieved.

The invention discloses a coal gasification slag self-drying quality-divided utilization system and method, and the method comprises the steps: carrying out preliminary separation on a coal gasification slag raw material through a screening machine, taking a high-ash-content oversize product as a tailing product, and enabling an undersize product to continuously pass through a grading cyclone to realize carbon-ash separation; overflow of the grading cyclone is fed into a settling tank for treatment, bottom flow of the grading cyclone is separated by a separator to obtain a heavy product and a light product, the heavy product is screened to obtain an oversize product as a tailing product, and an undersize product is fed into the settling tank; screening the light product to obtain an oversize product, dehydrating the oversize product as clean coal, and feeding an undersize product into a settling tank; feeding underflow of the settling tank into a dehydrator for dehydration to obtain middling coal; and the low-quality middling coal is directly combusted to deeply dehydrate the clean coal, and a final high-quality clean coal product is obtained. According to the technical scheme provided by the invention, graded and quality-divided large-scale resource utilization of the coal gasification slag can be realized, and energy recycling can be realized while environmental pollution can be effectively reduced.

The technological process of low pressure leaching coal-bearing kaolin powder to produce industrial aluminum sulfate includes the following steps: crushing and grinding coal-bearing kaolin to 150-200 mesh powder, metering and adding water to compound 55-65 wt% concentration slurry and reaction; mixing the ore slurry with sulfuric acid in the ratio of 0.55 kg to 610 kg to react at the temperature of 140+ / -2 deg.c and pressure of 0.33+ / -0.02Mpa for 4-5 hr; relieving pressure and adding water to dilute; depositing separation in a settling tank; neutralizing the solution via adding acid to pH 3-3.5 in a neutralizing tank; evaporating to concentrate and drum crystallizing to obtain product. The process is reasonable, reliable, low in production cost and high in leaching rate, and is used in developing aluminum salt resource.

The invention discloses a powdered coal gasification flash condensing system and process. A gray water pipe of gray water generated by powdered coal gasification washing is sequentially connected witha real flash tank, a vertical pipe bundle condenser, a condensate tank, a condensate pump and a vacuum pump, wherein a gas phase outlet of the real flash tank is communicated with an inlet in the topof a pipe bundle of the vertical pipe bundle condenser, and an outlet in the bottom of the pipe bundle of the vertical pipe bundle condenser is communicated with an inlet of the condensate tank; a liquid phase outlet of the condensate tank is connected with an inlet of the condensate pump, and an outlet of the condensate pump is respectively connected with a settling-removing tank removal pipeline and a pipe bundle top flushing pipeline for removing the vertical pipe bundle condenser; a gas phase outlet of the condensate tank is connected with an inlet of the vacuum pump, and an outlet of thevacuum pump is connected with a discharge port. The powdered coal gasification flash condensing system and process disclosed by the invention can effectively ensure the heat exchange effect of the flash condenser, increase the condensation amount of flash steam, reduce the pressure and temperature of the flash system, and meet the requirements of the operation of a gray water system.

The present invention discloses a device and method for the production of a multi -nozzle gas gas production furnace. The device includes normally pressure coal powder storage tanks, buckets and feed tanks, and the bottom out of the material tube of the tank and the burning mouth.There are buffer tanks and spiral conveyors. The spiral conveyor connects the burning mouth and gasification furnace in turn.High -pressure flash steaming tanks and vacuum flash steaming tanks, vacuum flash steaming tanks are connected to a turning filter, and the turning filter is connected to a settlement slot.The present invention can concentrate the heat of the coal, and can quantitatively control the flow of the coal, increase the amount of coal transportation. At the same time, the heat flux and the burning temperature are higher and effectively reduce the amount of synthetic gas.

The invention discloses a coal chemical industry high-salt wastewater zero-discharge process, comprising: the wastewater in the coal chemical industry wastewater settling tank is pumped into a pretreatment tank by a raw water pump, and after pretreatment, its produced water enters an adsorption tank; After the adsorber is saturated with adsorption, the system is automatically cut off, and the analysis tank is used for analysis; the analysis waste liquid generated after the analysis of the adsorber by the analysis tank is sent to the calcium recovery device through the first-stage heat exchanger and the second-stage heat exchanger. Processing, using a dispersant to produce nano-scale calcium carbonate, which is separated and solidified in a calcium-precipitated ceramic membrane and a calcium filter press to produce a nano-calcium carbonate product; after being separated by a class II ceramic membrane, the clear liquid enters the magnesium recovery device and passes through the magnesium-precipitated ceramic membrane. Magnesium products are produced after separation from magnesium and magnesium filter presses, and the clear liquid is recovered and reused as analytical liquid to achieve zero discharge and resource utilization of waste liquid. According to the characteristics of water quality, this application designs a process plan to realize standardization and resource utilization, to make waste from waste, to realize waste water recycling and zero discharge of waste water.

The invention relates to a multi-stage sedimentation rakeless concentrating device comprising a layered sedimentation diversion screen. A diversion sedimentation screen and a magnetic gathering sprinkler, the laminar diversion sedimentation screen includes a plurality of third diversion sedimentation subgroups arranged downwards along the outer wall of the central tank, and in the two adjacent sedimentation tanks, The lower settling tank obtains the coal slime water flowing out of the previous settling tank, and each third diversion settling subgroup includes a settling tank, and the bottom plate of the settling tank is provided with a third underflow discharge port for discharging the settled fine coal slime, and complete settlement The final water is output from the third overflow discharge pipe at the output end of the lowermost third flow settling subgroup. In the diversion settlement area of ​​the present invention, layered diversion diversion sedimentation sieves are used to sequentially pass through all the third diversion settlement subgroups, thereby realizing step-by-step settlement, and the fine coal slime and settled water are discharged from different pipes. achieve concentration.

The invention discloses a process and a device for improving the quality of coal by cooking waste oil. The waste oil enters the oil storage tank after passing through the impurity removal purifier, and then is added to the waste oil coal cooking kettle according to the oil-coal mass ratio of 5‑100:1, and mixed with the crushed lignite in the coal cooking device. Stir at high temperature, then discharge, and separate the solid and liquid through a filter screen; the solid upgraded coal is then collected by a filter press to collect the adsorbed oil, and the rest is the product lignite; the separated liquid enters the oil-water separation and settling tank for static The oil in the upper layer is removed through the filter press to remove the slime, the pure oil enters the fractionation tower to distill out the absorbed small molecular organic matter, and the remaining oil enters the oil storage tank for recycling; the separated water in the lower layer passes through the filter press After the minerals are removed, it becomes lignite and dehydrated.