Semi-coke and caustic soda flakes joint production system

Abstract

The semi-coke and caustic soda ash joint production system of the present invention comprises a coal preparation device, a dry distillation device, a semi-coke water seal cooling device, a semi-coke drying device, a caustic soda ash cooking device, a caustic soda ash cooling and discharging device, and a circulating water cooling device. The coal gas generated by the dry distillation of semi-coke is used as a heating fuel for caustic soda ash, which effectively utilizes the heat generated by the combustion of coal gas. The hot water in the circulating water cooling device is used as a heat source for the hot air of the semi-coke drying device, thereby improving the efficiency of the semi-coke drying device. At the same time, during the drying process, the outside air can also improve the cooling efficiency of the circulating water when exchanging heat with the circulating water cooling device. Since the temperature of the flue gas is relatively high, the flue gas will heat the cooling water. Therefore, the circulating cooling water system comprises a primary circulating water cooling mechanism, a secondary circulating water cooling mechanism, and a tertiary circulating water cooling mechanism. By cooling the cooling water through the multi-stage circulating water cooling mechanism, the temperature of the cooling water can be effectively reduced, thereby accelerating the cooling efficiency of the caustic soda ash in the caustic soda ash machine.

Description

Technical Field

[0001] The invention relates to the technical field of blue coke and caustic soda flake production, and in particular to a blue coke and caustic soda flake combined production system. Background Art

[0002] Semi-coke is anthracite made from high-quality Jurassic coal blocks. In terms of production and processing, semi-coke is a coking product, and the Ministry of Industry and Information Technology issued an access announcement in 2014. As a new type of carbon material, semi-coke has obvious advantages. Semi-coke has gradually replaced metallurgical coke with its high fixed carbon, high specific resistivity, high chemical activity, low ash content, low aluminum, low sulfur, and low phosphorus. It is widely used in chemical, smelting, gasification and other industries, and has become an indispensable raw material for the production of calcium carbide, ferroalloys, ferrosilicon, silicon carbide and other products. Raw coal will produce by-product coal gas in the process of preparing semi-coke. The components of coal gas include methane, carbon monoxide, hydrogen sulfide, coal tar, etc. If coal gas is used for combustion, sulfur dioxide gas will be produced during the combustion process, thereby polluting the environment. If coal gas is desulfurized, the corresponding cost will increase.

[0003] Low-concentration alkali liquid can be boiled to prepare high-concentration alkali liquid, and then flake alkali can be produced. The liquid alkali just out of the furnace is cooled down by the flake alkali machine to become flake alkali. At this time, the temperature of the flake alkali is very high. In order to prevent the flake alkali from scalding the packaging bag, the flake alkali should be cooled by water. After the flake alkali discharge device has been used for a period of time, the inner wall will stick. If it is not removed, it will affect the operation of the discharge device in the long run. Therefore, the flake alkali discharge device should be cleaned. The wastewater after cleaning is alkaline. In order to save water, the wastewater after cleaning will be used as cooling circulating water in the flake alkali circulating cooling water system for flake alkali to cool down. At the same time, the dust generated in the production process of flake alkali falls into the circulating water, which will also increase the alkalinity of the water. In the long run, these circulating waters will corrode the pipelines and pose certain safety hazards to workers. Summary of the invention

[0004] In view of this, it is necessary to provide a comprehensive production system of lignite and caustic soda flakes that can reduce production costs and does not harm the environment.

[0005] A semi-coke and caustic soda ash joint production system comprises a semi-coke dry distillation system and a caustic soda ash production system, wherein the semi-coke dry distillation system comprises a coal preparation device, a dry distillation device, and a coke screening device, wherein the discharge port of the coal preparation device is connected to the feed port of the dry distillation device, the coke discharge port of the dry distillation device is connected to the feed port of the coke screening device, the gas outlet of the dry distillation device is connected to the caustic soda ash production system to provide fuel gas, and the caustic soda ash production system comprises a gasifier, a high-level caustic soda dissolving tank, a caustic soda storage device, a caustic soda ash machine, and a circulating cooling water system, wherein the gas outlet of the dry distillation device is connected to the fuel inlet of the gasifier to supply fuel gas, and the high-level caustic soda dissolving tank frame is connected to the high-level caustic soda dissolving tank frame. It is installed on the gas furnace to heat the alkali solution, and the liquid alkali discharge port of the alkali dissolving high-level tank is connected to the feed port of the alkali flake machine to prepare the molten liquid alkali into alkali flakes. The circulating cooling water system cools the alkali flake machine. The exhaust port of the gas furnace is connected to the circulating cooling water system to neutralize the gas after combustion with the alkaline solute in the circulating cooling water system. The circulating cooling water system includes a primary circulating water cooling mechanism, a secondary circulating water cooling mechanism, and a tertiary circulating water cooling mechanism. The primary circulating water cooling mechanism is a cooling water pool. The upper end of the cooling water pool is open, and the bottom of the cooling water pool is provided with a water outlet. The water outlet is connected to the caustic soda flake machine through a pipeline. The secondary circulating water cooling mechanism is set up on the cooling water pool. The secondary circulating water cooling mechanism includes an inner support frame and a water baffle. The lower end of the inner support frame is fixedly connected to the four side walls of the cooling water pool. The upper end of the inner support frame is tilted downward. The water baffle is fixedly connected to the upper end of the inner support frame. The tertiary circulating water cooling mechanism is located directly above the secondary circulating water cooling mechanism. The tertiary circulating water cooling mechanism includes an outer support frame, a water receiving trough, a first hot water exchange pipe, and a water raising plate. The lower end of the outer support frame is fixedly connected to the outer walls around the cooling water pool. The upper end of the outer support frame The end face is higher than the end face of the upper end of the inner support frame, the water receiving trough and the water lifting plate are arranged on the upper end of the outer support frame, the cross-section of the water receiving trough is arc-shaped, and the outer side of the water receiving trough is higher than the inner side of the water receiving trough, the water outlet of the alkali flake machine is connected with the water inlet of the water receiving trough through a pipeline, and the exhaust port of the gas furnace extends into the bottom of the water receiving trough through a pipeline to neutralize the alkaline substances in the cooling water, the first hot water exchange pipe is laid in the water receiving trough, the water inlet of the first hot water exchange pipe is connected with the tap water pipeline, the water outlet of the first hot water exchange pipe is connected with the domestic water device, and the water lifting plate is arranged obliquely downward under the water receiving trough to receive the water in the water receiving trough.

[0006] Preferably, the caustic soda flake machine comprises a caustic soda flake cooling and feeding bin, two driving mechanisms, a water cooling mechanism, and an overflow mechanism. The caustic soda flake cooling and feeding bin is cylindrical, a feeding port is provided at the first end of the caustic soda flake cooling and feeding bin, a discharging cylinder is provided at the second end of the caustic soda flake cooling and feeding bin, the caustic soda flake cooling and feeding bin rotates relative to the discharging cylinder, the discharging cylinder is relatively stationary with the ground, a discharging port is provided at the bottom of the discharging cylinder, and the discharging port is connected with an external plastic packaging bag so that the cooled caustic soda flakes fall into the plastic packaging bag, external gears are provided on the side walls at both ends of the caustic soda flake cooling and feeding bin, the driving mechanism is meshedly connected with the caustic soda flake cooling and feeding bin through external gears, the water cooling mechanism is located between the two driving mechanisms, the inner wall of the water cooling mechanism is fixedly connected with the outer wall of the caustic soda flake cooling and feeding bin to cool the caustic soda flake cooling and feeding bin, and the overflow mechanism is located below the water cooling mechanism to contain The overflowing cooling water is received, and the water cooling mechanism includes a plurality of spiral baffles, a cooling water cylinder, and two water retaining rings. The spiral baffles are evenly distributed on the outer wall of the flake caustic soda cooling and conveying bin in a radial shape, and are fixedly connected to the flake caustic soda cooling and conveying bin, the outer side of the spiral baffles is fixedly connected to the inner wall of the cooling water cylinder, and the two water retaining rings are fixedly connected to the two ends of the cooling water cylinder respectively, and through holes are provided on the water retaining rings to facilitate the inlet and outlet of cooling water. The spiral baffles, the cooling water cylinder, the water retaining rings and the flake caustic soda cooling and conveying bin work together to form a plurality of spiral cooling chambers, and the water outlet of the cold water tank is connected with the water inlet of the cooling chamber, so that the cooling water enters the cooling chamber from one end of the cooling chamber through the through holes on the water retaining ring, and flows out of the cooling chamber from the other end of the cooling chamber through the through holes on the water retaining ring, and the cooling water exchanges heat with the flake caustic soda cooling and conveying bin during the flow.

[0007] Preferably, the driving mechanism includes a driving motor, a motor bracket, and a driving gear. The cylinder body of the driving motor is fixedly connected to the motor bracket, the rotating shaft of the driving motor is chain-drivenly connected to the rotating shaft of the driving gear, and the driving gear is meshedly connected to the external gear of the flake caustic soda cooling and feeding bin to drive the flake caustic soda cooling and feeding bin to rotate through the driving motor.

[0008] Preferably, the overflow mechanism includes an overflow trough plate, a support frame, an inlet overflow baffle, and an outlet overflow baffle. The overflow trough is arc-shaped, and a water outlet is provided at the bottom of the overflow trough. The outlet of the overflow trough is connected to an external water outlet pipe to discharge the water in the overflow trough. A support frame is provided at the bottom of the overflow trough to fix the overflow trough. The two ends of the overflow trough are respectively fixedly connected to the inlet overflow baffle and the outlet overflow baffle. The inlet overflow baffle and the outlet overflow baffle are connected to the front and rear of the water cooling mechanism. The two end faces are fitted together to reduce the outflow speed of water in the water cooling mechanism. A water inlet hole is provided at the upper end of the water inlet overflow baffle, and the external water inlet pipe is connected with the water inlet hole of the water inlet overflow baffle to allow the external cooling water to enter the water cooling mechanism from the water inlet hole of the water inlet overflow baffle. A water outlet hole is provided at the lower end of the water outlet overflow baffle, and the external water outlet pipe is connected with the water outlet hole of the water outlet overflow baffle to allow the heat-exchanged water in the cooling mechanism to enter the water outlet pipe from the water outlet hole of the water outlet overflow baffle.

[0009] Preferably, the alkali liquid storage device includes an alkali liquid storage tank, an outlet pipe, a booster pump, a concrete base layer, and a liquid collecting pool. The alkali liquid storage tank is provided with a liquid inlet on the top, and a liquid outlet on the bottom. The liquid outlet of the alkali liquid storage tank is connected with the liquid inlet of the outlet pipe, the liquid outlet of the outlet pipe is connected with the liquid inlet of the booster pump, and the liquid outlet of the booster pump is connected with the alkali dissolving high-level tank through a pipe. The concrete base layer is located on the ground where the alkali liquid storage tank, the outlet pipe, and the booster pump are located. A drainage trough is provided on the concrete base layer. The drainage trough is arranged around the alkali liquid storage tank and directly below the outlet pipe to guide the direction of the alkali liquid. The liquid collecting pool is located at the end of the drainage trough to collect the alkali liquid. The alkali liquid storage tank includes an anti-corrosion inner layer and a concrete outer layer. The concrete outer layer is wrapped on the outer wall of the anti-corrosion inner layer.

[0010] Preferably, the dry distillation device comprises a dry distillation square furnace and a semi-coke conveying unit, the dry distillation square furnace is located above the semi-coke conveying unit, the conveying unit comprises a push plate mechanism, a scraper conveyor, a tapered chute, a sealing cover, and a drying mechanism, the push plate mechanism is installed at the inner bottom of the furnace body of the dry distillation square furnace, the push plate mechanism reciprocates left and right on the bottom surface of the furnace body under the action of a reciprocating driving member to scrape the semi-coke in the furnace body from the discharge port at the bottom of the furnace body, one end of the tapered chute is connected to the discharge port at the bottom of the dry distillation square furnace, and the other end of the chute is connected to the scraper conveyor, so that the dry distillation square furnace The semi-coke in the furnace falls into the scraper conveyor through a tapered chute. The scraper conveyor is filled with water, and one end of the chute of the corresponding scraper conveyor is in a water seal in the scraper conveyor, so that the gas in the furnace body cannot be discharged from the end of the chute. The scraper assembly in the scraper conveyor is in a water seal state, so that the semi-coke in the scraper conveyor is isolated from the air. The scraper conveyor is built into a sealing cover, and the top of the sealing cover is connected to one end of the chute of the corresponding scraper conveyor, one end of the drying mechanism is connected to one end of the scraper conveyor, and the other end of the drying mechanism is connected to a coke screening device.

[0011] Preferably, the drying mechanism includes an insulating shell, a plurality of hot air ducts, and a lignite conveying mechanism. The upper end of the insulating shell is conical, and an air outlet is provided on the top of the insulating shell to discharge hot air. The lower end of the insulating shell is cylindrical, and the air outlets of the plurality of hot air ducts are in the tangent direction of the same circle so that the wind going out of the hot air ducts forms a vortex. The hot air ducts are laid in a serpentine shape in the cooling water pool to heat the air through the water in the cooling water pool. The lignite conveying mechanism crosses the insulating shell to dry the lignite by hot air. The lignite conveying mechanism includes a plurality of conveyor belts arranged in a vertical direction, and each layer of conveyor belts has an independent driving motor to drive the conveyor belt to rotate. The top conveyor belt is a feed conveyor belt, and the bottom conveyor belt is a discharge conveyor belt. The feed conveyor belt is connected to a scraper conveyor, and the discharge conveyor belt is connected to a coke screening device to screen the dried semi-coke.

[0012] Beneficial effects: The semi-coke and caustic soda joint production system of the present invention comprises a coal preparation device, a dry distillation device, a semi-coke water seal cooling device, a semi-coke drying device, a caustic soda flake cooking device, a caustic soda flake cooling and discharging device, and a circulating water cooling device. The discharge port of the coal preparation device is connected to the feed port of the dry distillation device to feed the raw coal into the dry distillation device. The gas outlet of the dry distillation device is connected to the gas inlet of the caustic soda flake cooking device to use the gas generated by dry distillation as fuel for the caustic soda flake cooking device. The discharge port of the semi-coke water seal cooling device is connected to the feed port of the semi-coke drying device to reduce the moisture content of the semi-coke. The air inlet of the semi-coke drying device is connected to the circulating water cooling device to heat the air through the circulating water cooling device. The gas generated by the dry distillation of semi-coke is used as a heating fuel for caustic soda flakes, which effectively utilizes the heat generated by the combustion of the gas. The hot water in the circulating water cooling device is used as a heat source for the hot air of the semi-coke drying device, which improves the efficiency of the semi-coke drying device. Due to the high temperature of the flue gas, the flue gas will heat the cooling water. Therefore, the circulating cooling water system includes a primary circulating water cooling mechanism, a secondary circulating water cooling mechanism, and a tertiary circulating water cooling mechanism. By cooling the cooling water through the multi-stage circulating water cooling mechanism, the temperature of the cooling water can be effectively reduced, thereby speeding up the cooling efficiency of the caustic soda flakes in the caustic soda flake machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a functional module diagram of the present invention.

[0014] Figure 2 It is a process flow chart of the present invention.

[0015] Figure 3 It is a schematic structural diagram of the circulating cooling water system of the present invention.

[0016] Figure 4 It is a cross-sectional view of the circulating cooling water system of the present invention.

[0017] Figures 5 to 7 It is a structural schematic diagram of the caustic soda flake machine of the present invention.

[0018] Figure 8 It is a schematic structural diagram of the alkali solution storage device of the present invention.

[0019] Fig. 9 It is a structural schematic diagram of the drying mechanism of the present invention.

[0020] Fig.10 It is a cross-sectional view of the drying mechanism of the present invention.

[0021] In the figure: semi-coke and caustic soda flake joint production system 10, semi-coke dry distillation system 20, coal preparation device 201, dry distillation device 202, dry distillation square furnace 2021, semi-coke conveying unit 2022, push plate mechanism 20221, scraper conveyor 20222, conical chute 20223, sealing cover 20224, drying mechanism 20225, insulation shell 202251, hot air duct 202252, semi-coke conveying mechanism 202253, coke screening device 203, caustic soda flake production system 30, gas furnace 301, alkali dissolving high-level tank 302, alkali liquid storage device 303, alkali liquid storage tank 3031, liquid outlet pipeline 3032, booster pump 3033, concrete base 3034, liquid collecting tank 3035, caustic soda flake machine 304, caustic soda flake cooling and feeding Warehouse 3041, driving mechanism 3042, driving motor 30421, motor bracket 30422, driving gear 30423, water cooling mechanism 3043, spiral partition 30431, cooling water cylinder 30432, water retaining ring 30433, overflow mechanism 3044, overflow trough plate 30441, support frame 30442, water inlet overflow baffle 30443, water outlet overflow baffle 30444, circulating cooling water system 305, primary circulating water cooling mechanism 3051, secondary circulating water cooling mechanism 3052, inner support frame 30521, water retaining plate 30522, tertiary circulating water cooling mechanism 3053, outer support frame 30531, water receiving trough 30532, first hot water exchange pipe 30533, and water raising plate 30534. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Please see Figures 1 to 4A semi-coke and caustic soda joint production system 10 includes a semi-coke dry distillation system 20 and a caustic soda production system 30. The semi-coke dry distillation system 20 includes a coal preparation device 201, a dry distillation device 202, and a coke screening device 203. The discharge port of the coal preparation device 201 is connected to the feed port of the dry distillation device 202, the coke discharge port of the dry distillation device 202 is connected to the feed port of the coke screening device 203, and the gas outlet of the dry distillation device 202 is connected to the caustic soda production system 30 to provide fuel gas. The caustic soda production system 30 includes a gasifier 301, a high-level alkali dissolving tank 302, a alkali liquid storage device 303, a caustic soda machine 304, and a circulating cooling water system 305. The gas outlet of the dry distillation device 202 is connected to the fuel inlet of the gasifier 301 to supply fuel gas. 302 is mounted on the gas furnace 301 to heat the alkali solution. The liquid alkali discharge port of the alkali dissolving high-level tank 302 is connected to the feed port of the alkali flake machine 304 to prepare the molten liquid alkali into alkali flakes. The circulating cooling water system 305 cools down the alkali flake machine 304. The exhaust port of the gas furnace 301 is connected to the circulating cooling water system 305 to neutralize the gas after combustion with the alkaline solute in the circulating cooling water system 305. The circulating cooling water system 305 includes a primary circulating water cooling mechanism 3051, a secondary circulating water cooling mechanism 3052, and a tertiary circulating water cooling mechanism 3053. The primary circulating water cooling mechanism 3051 is a cooling water pool. The upper end of the cooling water pool is open, and a water outlet is provided at the bottom of the cooling water pool. The water outlet of the cooling water pool is connected to the alkali flake machine 30 The secondary circulating water cooling mechanism 3052 is connected through pipelines, and is set up on the cooling water pool. The secondary circulating water cooling mechanism 3052 includes an inner support frame 30521 and a water baffle 30522. The lower end of the inner support frame 30521 is fixedly connected to the four side walls of the cooling water pool. The upper end of the inner support frame 30521 is tilted downward, and the water baffle 30522 is fixedly connected to the upper end of the inner support frame 30521. The tertiary circulating water cooling mechanism 3053 is located directly above the secondary circulating water cooling mechanism 3052. The tertiary circulating water cooling mechanism 3053 includes an outer support frame 30531, a water receiving trough 30532, a first hot water exchange pipe 30533, and a water raising plate 30534. The lower end of the outer support frame 30531 is fixedly connected to the outer walls of the cooling water pool. The outer support frame 30531 has an upper end surface higher than the upper end surface of the inner support frame, the water receiving trough 30532 and the water raising plate 30534 are arranged on the upper end of the outer support frame 30531, the cross section of the water receiving trough 30532 is arc-shaped, and the outer side of the water receiving trough 30532 is higher than the inner side of the water receiving trough 30532, the water outlet of the alkali flake machine 304 is connected with the water inlet of the water receiving trough 30532 through a pipeline, the exhaust port of the gas furnace 301 extends into the bottom of the water receiving trough 30532 through a pipeline to neutralize the alkaline substances in the cooling water, the first hot water exchange pipe 30533 is laid in the water receiving trough 30532, the water outlet of the first hot water exchange pipe 30533 is connected with the tap water pipeline, and the water outlet of the first hot water exchange pipe 30533 is connected with the domestic water device,The water-lifting plate 30534 is arranged below the water receiving tank 30532 at an angle downward to receive the water in the water receiving tank 30532.

[0024] For further information, see Figures 5 to 7 The caustic soda flake machine 304 includes a caustic soda flake cooling feeding bin 3041, two driving mechanisms 3042, a water cooling mechanism 3043, and an overflow mechanism 3044. The caustic soda flake cooling feeding bin 3041 is cylindrical, a feeding port is provided at the first end of the caustic soda flake cooling discharging bin, a discharging cylinder is provided at the second end of the caustic soda flake cooling discharging bin, the caustic soda flake cooling discharging bin rotates relative to the discharging cylinder, the discharging cylinder is relatively stationary with the ground, a discharging port is provided at the bottom of the discharging cylinder, and the discharging port is connected to the external plastic packaging bag so that the cooled caustic soda flakes fall into the plastic packaging bag. In the packaging bag, external gears are provided on the side walls of both ends of the caustic soda cooling and feeding bin 3041, and the driving mechanism 3042 is meshed and connected with the caustic soda cooling and feeding bin 3041 through the external gears. The water cooling mechanism 3043 is located between the two driving mechanisms 3042, and the inner wall of the water cooling mechanism 3043 is fixedly connected with the outer wall of the caustic soda cooling and feeding bin 3041 to cool the caustic soda cooling and feeding bin 3041. The overflow mechanism 3044 is located below the water cooling mechanism 3043 to receive the overflowing cooling water. 3043 includes a plurality of spiral baffles 30431, a cooling water cylinder 30432, and two water retaining rings 30433. The spiral baffles 30431 are evenly distributed on the outer wall of the caustic soda cooling and feeding bin 3041 in a radial shape and are fixedly connected to the caustic soda cooling and feeding bin 3041. The outer side of the spiral baffles 30431 is fixedly connected to the inner wall of the cooling water cylinder 30432. The two water retaining rings 30433 are respectively fixedly connected to the two ends of the cooling water cylinder 30432. The water retaining rings 30433 are provided with through holes to facilitate the cooling water to enter. The spiral partition 30431, the cooling water cylinder 30432, the water retaining ring 30433 and the caustic soda cooling and feeding bin 3041 work together to form a number of spiral cooling chambers, and the outlet of the cold water tank is connected with the water inlet of the cooling chamber, so that the cooling water enters the cooling chamber from one end of the cooling chamber through the through hole on the water retaining ring 30433, and flows out of the cooling chamber from the other end of the cooling chamber through the through hole on the water retaining ring 30433. The cooling water exchanges heat with the caustic soda cooling and feeding bin 3041 during the flow.

[0025] Furthermore, the driving mechanism 3042 includes a driving motor 30421, a motor bracket 30422, and a driving gear 30423. The cylinder body of the driving motor 30421 is fixedly connected to the motor bracket 30422, the rotating shaft of the driving motor 30421 is connected to the rotating shaft chain transmission of the driving gear 30423, and the driving gear 30423 is meshedly connected to the external gear of the flake caustic soda cooling and feeding bin 3041, so as to drive the flake caustic soda cooling and feeding bin 3041 to rotate through the driving motor 30421.

[0026] Furthermore, the overflow mechanism 3044 includes an overflow trough plate 30441, a support frame 30442, an inlet overflow baffle 30443, and an outlet overflow baffle. The overflow trough is arc-shaped, and a water outlet is provided at the bottom of the overflow trough. The water outlet of the overflow trough is connected to an external water outlet pipe to discharge the water in the overflow trough. A support frame 30442 is provided at the bottom of the overflow trough to fix the overflow trough. The two ends of the overflow trough are respectively fixedly connected to the inlet overflow baffle 30443 and the outlet overflow baffle 30444. The inlet overflow baffle 30443 and the outlet overflow baffle 30444 are connected to the water cooling mechanism 304. 3 is fitted together to reduce the outflow speed of water in the water cooling mechanism 3043, a water inlet hole is provided at the upper end of the water inlet overflow baffle 30443, and an external water inlet pipe is communicated with the water inlet hole of the water inlet overflow baffle 30443, so that the external cooling water enters the water cooling mechanism 3043 from the water inlet hole of the water inlet overflow baffle 30443, and a water outlet hole is provided at the lower end of the water outlet overflow baffle 30444, and an external water outlet pipe is communicated with the water outlet hole of the water outlet overflow baffle 30444, so that the heat-exchanged water in the cooling mechanism enters the water outlet pipe from the water outlet hole of the water outlet overflow baffle 30444.

[0027] The working process of the caustic soda flake machine 304 of the present invention is as follows: in the initial stage, the driving motor 30421 drives the caustic soda flake cooling feed bin 3041 to rotate, and the molten caustic soda flakes are cooled and extruded from the cooling and molding device and then enter the caustic soda flake cooling feed bin 3041, and flow out from the discharge port under the transportation of the caustic soda flake cooling feed bin 3041. Since the temperature of the caustic soda flakes is very high, the temperature of the feed bin is also very high. The feed bin will drive the cooling mechanism to rotate during the rotation process, and when the water inlet on the cooling mechanism intersects with the water inlet hole on the water inlet overflow baffle 30443 on the overflow mechanism 3044, the cooling water enters the cooling mechanism. The cooling water in the cooling mechanism exchanges heat with the side wall of the feed bin. There are three heat exchange modes in nature, namely heat conduction, heat radiation, and convection heat exchange. The cooling water of the spray device of the prior art falls at a faster speed, and the cooling water can only stay on the spray device by the viscosity of the cooling water and the feed bin. The cooling water stays for a short time and has a short contact time with the feed bin. Therefore, the heat exchange effect between the cooling water and the feed bin is poor. The cooling mechanism of the present invention contains a plurality of spiral cooling chambers. The heat carried by the caustic soda flakes themselves is first conducted to the side wall of the feed bin, and then conducted to the spiral partition 30431, the cooling water cylinder 30432 and the cooling water in the cooling chamber formed by them. Since the heat conduction speed of metal is faster than that of water, the temperature of the side wall of the cooling chamber is higher than the temperature of the cooling water. In this way, the cooling water can exchange heat with the multiple side walls of the cooling chamber, thereby improving the heat exchange efficiency. At the same time, the movement of the cooling water in the cooling chamber can promote convective heat exchange, and the time that the cooling water stays in the cooling chamber is much longer than the residence time of the cooling water of the spray device, so the heat exchange time is also longer. At the same time, the specific heat capacity of water is much greater than the specific heat capacity of air and metal. This means that water can store more heat, but the temperature rise is not as fast as air and metal, which can keep a large temperature difference between the water and the side wall of the feed bin, which is more conducive to heat exchange. In summary, the cooling mechanism of the present invention greatly improves the cooling efficiency of caustic soda flakes.

[0028] As the feed bin rotates, the water outlet in the cooling chamber turns to intersect with the water outlet hole on the outlet overflow baffle 30444, and the cooling water flows out from the outlet pipe. In actual application, the overflow baffle cannot fit completely with the cooling chamber, and a small amount of cooling water will flow out from the gap between the overflow baffle and the water retaining ring 30433. The overflow trough can catch this part of the cooling water. At the same time, during the rotation of the feed bin, the water in the overflow trough will adhere to the side wall of the feed bin. This water will exchange heat with the side wall of the cooling chamber. In addition, part of the water will evaporate during the heat exchange process, thereby further improving the heat exchange efficiency.

[0029] For further information, see Figure 8The alkali liquid storage device 303 comprises an alkali liquid storage tank 3031, a liquid outlet pipe 3032, a booster pump 3033, a concrete base 3034, and a liquid collecting tank 3035. The top of the alkali liquid storage tank 3031 is provided with a liquid inlet, and the bottom of the alkali liquid storage tank 3031 is provided with a liquid outlet. The liquid outlet of the alkali liquid storage tank 3031 is connected to the liquid inlet of the liquid outlet pipe 3032, the liquid outlet of the liquid outlet pipe 3032 is connected to the liquid inlet of the booster pump 3033, and the liquid outlet of the booster pump 3033 is connected to the alkali high-level tank 3034. 02 are connected by pipelines, and the concrete base layer 3034 is located on the ground where the alkali liquid storage tank 3031, the liquid outlet pipe 3032, and the booster pump 3033 are located. A drainage trough is provided on the concrete base layer 3034, and the drainage trough is arranged around the alkali liquid storage tank 3031 and directly below the liquid outlet pipe 3032 to guide the direction of the alkali liquid. The liquid collecting pool 3035 is located at the end of the drainage trough to collect the alkali liquid. The alkali liquid storage tank 3031 includes an anti-corrosion inner layer and a concrete outer layer, and the concrete outer layer is wrapped on the outer wall of the anti-corrosion inner layer.

[0030] When the alkali liquid storage device 303 of the present invention is in use, the external liquid alkali tanker first injects the alkali liquid into the alkali liquid storage tank 3031. If the alkali liquid overflows, the overflowed alkali liquid will flow to the liquid collecting tank 3035 along the drainage groove at the bottom of the alkali liquid storage tank 3031. Due to the protection of the outer layer of concrete, the external environment will not corrode the alkali liquid storage tank 3031, nor will it age due to wind and sun, and the life of the alkali liquid storage tank 3031 is greatly improved. And the concrete layer can produce a good heat insulation effect to prevent the temperature in the alkali liquid storage tank 3031 from being too high, causing abnormal internal pressure. The anti-corrosion inner layer can be an anti-corrosion material such as plastic, fiberglass, stainless steel, carbon steel, etc. Around the alkali liquid storage device 303, the alkalinity is higher than other places. If it rains, rainwater will bring alkaline substances on the surface of the ground into the underground, thereby causing soil pollution and groundwater pollution. The concrete base 3034 of the present invention is provided with a drainage trough, which can guide the rainwater around the alkali liquid storage device 303 to the liquid collecting tank 3035 to prevent environmental pollution. The alkaline water injected into the liquid collecting tank 3035 can also be recycled.

[0031] Furthermore, the dry distillation device 202 includes a dry distillation square furnace 2021 and a semi-coke conveying unit 2022. The dry distillation square furnace 2021 is located above the semi-coke conveying unit 2022. The conveying unit includes a push plate mechanism 20221, a scraper conveyor 20222, a tapered chute 20223, a sealing cover 20224, and a drying mechanism 20225. The push plate mechanism 20221 is installed at the bottom inner side of the furnace body of the dry distillation square furnace 2021. The push plate mechanism 20221 reciprocates left and right on the bottom surface of the furnace body under the action of a reciprocating drive member to scrape the semi-coke in the furnace body from the discharge port at the bottom of the furnace body. One end of the tapered chute 20223 is connected to the discharge port at the bottom of the dry distillation square furnace 2021, and the other end of the chute is connected to the scraper conveyor 20222, so that the dry distillation square furnace 2 The semi-coke in 021 falls into the scraper conveyor 20222 through the conical chute 20223. The scraper conveyor 20222 is filled with water, and one end of the chute of the corresponding scraper conveyor 20222 is in the water seal in the scraper conveyor 20222, so that the gas in the furnace body cannot be discharged from the end of the chute. The scraper assembly in the scraper conveyor 20222 is in a water seal state, so that the semi-coke in the scraper conveyor 20222 is isolated from the air. The scraper conveyor 20222 is built in a sealing cover 20224, and the top of the sealing cover 20224 is connected to one end of the chute of the corresponding scraper conveyor 20222. One end of the drying mechanism 20225 is connected to one end of the scraper conveyor 20222, and the other end of the drying mechanism 20225 is connected to the coke screening device 203.

[0032] For further information, see Fig. 9 and Fig.10 The drying mechanism 20225 includes an insulating shell 202251, a plurality of hot air ducts 202252, and a blue carbon conveying mechanism 202253. The upper end of the insulating shell 202251 is conical, and an air outlet is provided on the top of the insulating shell 202251 to discharge hot air. The lower end of the insulating shell 202251 is cylindrical, and the air outlets of the plurality of hot air ducts 202252 are in the tangent direction of the same circle, so that the wind going out of the hot air duct 202252 forms a vortex. The hot air duct 202252 is laid in a serpentine shape in the cooling water pool to pass through the cooling water. The water in the cooling pool heats the air, and the lignite conveying mechanism 202253 crosses the insulating shell 202251 to dry the lignite by hot air. The lignite conveying mechanism 202253 includes multiple layers of conveyor belts, which are arranged in the vertical direction. Each layer of conveyor belts has an independent driving motor 30421 to drive the conveyor belt to rotate. The top conveyor belt is the feed conveyor belt, and the bottom conveyor belt is the discharge conveyor belt. The feed conveyor belt is connected to the scraper conveyor 20222, and the discharge conveyor belt is connected to the coke screening device 203 to screen the dried semi-coke.

[0033] In a preferred embodiment, the cross-section of the heat-insulating shell 202251 is circular, the air outlet of the heat-insulating shell 202251 is on the axis of the heat-insulating shell 202251, and the number of the hot air ducts 202252 is three. The air outlets of the three hot air ducts 202252 are tangent to the concentric circles of the heat-insulating shell 202251, and when the air is discharged, the hot air forms a vortex in the blue charcoal drying device. The vortex can prolong the residence time of the hot air in the blue charcoal drying device, so that more moisture can be taken away. At the same time, under the action of gravity, some of the solid particles carried into the air by the hot air will also fall down under the action of centrifugal force, thereby reducing the outflow of dust.

[0034] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A blue carbon and caustic soda joint production system, characterized by: The invention comprises a semi-coke dry distillation system and a caustic soda flake production system. The semi-coke dry distillation system comprises a coal preparation device, a dry distillation device and a coke screening device. The discharge port of the coal preparation device is connected with the feed port of the dry distillation device, the coke discharge port of the dry distillation device is connected with the feed port of the coke screening device, the gas outlet of the dry distillation device is connected with the caustic soda flake production system to provide fuel gas. The caustic soda flake production system comprises a gasifier, a high-level caustic soda dissolving tank, a caustic soda storage device, a caustic soda flake machine and a circulating cooling water system. The gas outlet of the dry distillation device is connected with the fuel inlet of the gasifier to supply fuel gas. The high-level caustic soda dissolving tank is mounted on the gasifier to heat the caustic soda. The liquid caustic soda outlet of the high-level alkali dissolving tank is connected to the feed port of the caustic soda flake machine to prepare the molten liquid caustic soda into caustic soda flakes. The circulating cooling water system cools down the caustic soda flake machine. The exhaust port of the gas furnace is connected to the circulating cooling water system to neutralize the gas after combustion with the alkaline solute in the circulating cooling water system. The circulating cooling water system includes a primary circulating water cooling mechanism, a secondary circulating water cooling mechanism, and a tertiary circulating water cooling mechanism. The primary circulating water cooling mechanism is a cooling water pool. The upper end of the cooling water pool is open, and the bottom of the cooling water pool is provided with a water outlet. The water outlet of the cooling water pool is connected to the caustic soda flake machine. The machine is connected through a pipeline, and the secondary circulating water cooling mechanism is set up on the cooling water pool. The secondary circulating water cooling mechanism includes an inner support frame and a water baffle. The lower end of the inner support frame is fixedly connected to the four side walls of the cooling water pool, the upper end of the inner support frame is tilted downward, and the water baffle is fixedly connected to the upper end of the inner support frame. The tertiary circulating water cooling mechanism is located directly above the secondary circulating water cooling mechanism. The tertiary circulating water cooling mechanism includes an outer support frame, a water receiving trough, a first hot water exchange pipe, and a water raising plate. The lower end of the outer support frame is fixedly connected to the outer walls around the cooling water pool, and the end surface height of the upper end of the outer support frame is The water receiving trough and the water lifting plate are arranged on the upper end of the outer supporting frame, the cross-section of the water receiving trough is arc-shaped, and the outer side of the water receiving trough is higher than the inner side of the water receiving trough, the water outlet of the alkali flake machine is connected with the water inlet of the water receiving trough through a pipeline, and the exhaust port of the gas furnace extends into the bottom of the water receiving trough through a pipeline to neutralize the alkaline substances in the cooling water, the first hot water exchange pipe is laid in the water receiving trough, the water outlet of the first hot water exchange pipe is connected with the tap water pipeline, the water outlet of the first hot water exchange pipe is connected with the domestic water device, and the water lifting plate is arranged obliquely downward under the water receiving trough to receive the water in the water receiving trough.

2. The blue carbon and caustic soda joint production system according to claim 1, characterized in that: The caustic soda flake machine comprises a caustic soda flake cooling and feeding bin, two driving mechanisms, a water cooling mechanism, and an overflow mechanism. The caustic soda flake cooling and feeding bin is cylindrical, a feeding port is provided at the first end of the caustic soda flake cooling and feeding bin, a discharging cylinder is provided at the second end of the caustic soda flake cooling and feeding bin, the caustic soda flake cooling and feeding bin rotates relative to the discharging cylinder, the discharging cylinder is relatively stationary with the ground, a discharging port is provided at the bottom of the discharging cylinder, and the discharging port is connected with an external plastic packaging bag so that the cooled caustic soda flakes fall into the plastic packaging bag, external gears are provided on the side walls at both ends of the caustic soda flake cooling and feeding bin, the driving mechanism is meshedly connected with the caustic soda flake cooling and feeding bin through the external gears, the water cooling mechanism is located between the two driving mechanisms, the inner wall of the water cooling mechanism is fixedly connected with the outer wall of the caustic soda flake cooling and feeding bin to cool the caustic soda flake cooling and feeding bin, and the overflow mechanism is located below the water cooling mechanism to cool the caustic soda flake cooling and feeding bin. The overflowing cooling water is collected, and the water cooling mechanism includes a plurality of spiral baffles, a cooling water cylinder, and two water retaining rings. The spiral baffles are evenly distributed on the outer wall of the flake caustic soda cooling and conveying bin in a radial shape, and are fixedly connected to the flake caustic soda cooling and conveying bin, the outer side of the spiral baffles is fixedly connected to the inner wall of the cooling water cylinder, and the two water retaining rings are fixedly connected to the two ends of the cooling water cylinder respectively, and through holes are provided on the water retaining rings to facilitate the inlet and outlet of cooling water. The spiral baffles, the cooling water cylinder, the water retaining rings and the flake caustic soda cooling and conveying bin work together to form a plurality of spiral cooling chambers, and the water outlet of the cold water pool is connected with the water inlet of the cooling chamber, so that the cooling water enters the cooling chamber from one end of the cooling chamber through the through holes on the water retaining ring, and flows out of the cooling chamber from the other end of the cooling chamber through the through holes on the water retaining ring, and the cooling water exchanges heat with the flake caustic soda cooling and conveying bin during the flow.

3. The blue carbon and caustic soda joint production system according to claim 2, characterized in that: The driving mechanism includes a driving motor, a motor bracket, and a driving gear. The cylinder body of the driving motor is fixedly connected to the motor bracket, the rotating shaft of the driving motor is chain-drivenly connected to the rotating shaft of the driving gear, and the driving gear is meshedly connected to the external gear of the caustic soda cooling and feeding bin to drive the caustic soda cooling and feeding bin to rotate through the driving motor.

4. The blue carbon and caustic soda joint production system according to claim 2, characterized in that: The overflow mechanism includes an overflow trough plate, a support frame, an inlet overflow baffle, and an outlet overflow baffle. The overflow trough is arc-shaped, and a water outlet is provided at the bottom of the overflow trough. The outlet of the overflow trough is connected to an external water outlet pipe to discharge the water in the overflow trough. A support frame is provided at the bottom of the overflow trough to fix the overflow trough. The two ends of the overflow trough are respectively fixedly connected to the inlet overflow baffle and the outlet overflow baffle. The inlet overflow baffle and the outlet overflow baffle are connected to the front and rear two of the water cooling mechanism. The end faces are fitted to reduce the outflow speed of water in the water cooling mechanism. A water inlet hole is provided at the upper end of the water inlet overflow baffle, and the external water inlet pipe is connected with the water inlet hole of the water inlet overflow baffle to allow the external cooling water to enter the water cooling mechanism from the water inlet hole of the water inlet overflow baffle. A water outlet hole is provided at the lower end of the water outlet overflow baffle, and the external water outlet pipe is connected with the water outlet hole of the water outlet overflow baffle to allow the heat-exchanged water in the cooling mechanism to enter the water outlet pipe from the water outlet hole of the water outlet overflow baffle.

5. The blue carbon and caustic soda joint production system according to claim 1, characterized in that: The alkali liquid storage device includes an alkali liquid storage tank, a liquid outlet pipe, a booster pump, a concrete base layer, and a liquid collecting pool. The alkali liquid storage tank is provided with a liquid inlet on the top, and a liquid outlet on the bottom. The liquid outlet of the alkali liquid storage tank is connected with the liquid inlet of the liquid outlet pipe, the liquid outlet of the liquid outlet pipe is connected with the liquid inlet of the booster pump, and the liquid outlet of the booster pump is connected with the alkali dissolving high-level tank through a pipe. The concrete base layer is located on the ground where the alkali liquid storage tank, the liquid outlet pipe, and the booster pump are located. A drainage trough is provided on the concrete base layer. The drainage trough is arranged around the alkali liquid storage tank and directly below the liquid outlet pipe to guide the direction of the alkali liquid. The liquid collecting pool is located at the end of the drainage trough to collect the alkali liquid. The alkali liquid storage tank includes an anti-corrosion inner layer and a concrete outer layer. The concrete outer layer is wrapped on the outer wall of the anti-corrosion inner layer.

6. The blue carbon and caustic soda joint production system according to claim 1, characterized in that: The dry distillation device comprises a dry distillation square furnace and a semi-coke conveying unit. The dry distillation square furnace is located above the semi-coke conveying unit. The conveying unit comprises a push plate mechanism, a scraper conveyor, a conical chute, a sealing cover, and a drying mechanism. The push plate mechanism is installed at the bottom of the inner side of the furnace body of the dry distillation square furnace. The push plate mechanism reciprocates left and right on the bottom surface of the furnace body under the action of a reciprocating driving member to scrape the semi-coke in the furnace body from the discharge port at the bottom of the furnace body. One end of the conical chute is connected to the discharge port at the bottom of the dry distillation square furnace, and the other end of the chute is connected to the scraper conveyor to allow the semi-coke in the dry distillation square furnace to be discharged from the discharge port at the bottom of the furnace body. The semi-coke falls into the scraper conveyor through the tapered chute, the scraper conveyor is filled with water, and one end of the chute of the corresponding scraper conveyor is in the water seal in the scraper conveyor, so that the gas in the furnace body cannot be discharged from the end of the chute, the scraper assembly in the scraper conveyor is in a water seal state, so that the semi-coke in the scraper conveyor is isolated from the air, the scraper conveyor is built in a sealing cover, the top of the sealing cover is connected with one end of the chute of the corresponding scraper conveyor, one end of the drying mechanism is connected with one end of the scraper conveyor, and the other end of the drying mechanism is connected with the coke screening device.

7. The blue carbon and caustic soda joint production system according to claim 6, characterized in that: The drying mechanism includes an insulating shell, multiple hot air ducts, and a lignite conveying mechanism. The upper end of the insulating shell is conical, and an air outlet is provided on the top of the insulating shell to discharge hot air. The lower end of the insulating shell is cylindrical, and the air outlets of the multiple hot air ducts are in the tangent direction of the same circle, so that the wind going out of the hot air duct forms a vortex. The hot air duct is laid in a serpentine shape in the cooling water pool to heat the air through the water in the cooling water pool. The lignite conveying mechanism crosses the insulating shell to dry the lignite by hot air. The lignite conveying mechanism includes a multi-layer conveyor belt, which is arranged in a vertical direction. Each layer of the conveyor belt has an independent driving motor to drive the conveyor belt to rotate. The top conveyor belt is a feed conveyor belt, and the bottom conveyor belt is a discharge conveyor belt. The feed conveyor belt is connected to a scraper conveyor, and the discharge conveyor belt is connected to a coke screening device to screen the dried semi-coke.

Images