CN210945495U

CN210945495U - Semi coke and flake caustic soda combined production system

Info

Publication number: CN210945495U
Application number: CN201922110066.7U
Authority: CN
Inventors: 白鹏; 杨飞雄
Original assignee: Ningxia Jinyuan Chemical Co ltd
Current assignee: Ningxia Jinyuan Chemical Co ltd
Priority date: 2019-11-30
Filing date: 2019-11-30
Publication date: 2020-07-07
Anticipated expiration: 2029-11-30

Abstract

The utility model discloses a blue charcoal, caustic soda flake joint production system include blue charcoal dry distillation system, caustic soda flake production system, blue charcoal dry distillation system is including being equipped with coal device, dry distillation device, sieve burnt device, caustic soda flake production system includes the gas furnace, dissolves alkali elevated tank, alkali lye storage jar, caustic soda flake machine, recirculating cooling water system, and the coal gas of blue charcoal dry distillation system production is used for the fuel of caustic soda flake production system, and the waste gas after the burning can the coolant water of the recirculating cooling water system of caustic soda flake production system to reduce or avoid the corruption of pipeline. And circulating water of the flake caustic soda combined production system and a drying mechanism of the semi-coke dry distillation system exchange heat with each other, so that the drying cost can be reduced, and the heat exchange efficiency of the flake caustic soda combined production system can be accelerated.

Description

Semi coke and flake caustic soda combined production system

Technical Field

The utility model relates to the technical field of, especially, relate to a semi coke, caustic soda flakes joint production system.

Background

The semi coke is anthracite fired by high-quality Jurassic coal blocks. From the aspect of production and processing, semi coke belongs to a coking product and is issued admission bulletins by the industry and the information department in 2014. As a novel carbon material, the semi-coke has obvious advantages, and has the characteristics of high fixed carbon, high specific resistance, high chemical activity, low ash content, low aluminum, low sulfur and low phosphorus, so that the semi-coke is widely used in the industries of chemical industry, smelting, gas making and the like by replacing metallurgical coke one by one and becomes essential raw fuel for producing products such as calcium carbide, ferroalloy, ferrosilicon, silicon carbide and the like. The raw coal can generate coal gas as a byproduct in the semi-coke preparation process. The components of the coal gas are methane, carbon monoxide, hydrogen sulfide, coal tar and the like. If the coal gas is used for combustion, sulfur dioxide gas is generated in the combustion process, thereby polluting the environment. If the coal gas is subjected to desulfurization treatment, the corresponding cost is increased.

The low-concentration alkali liquor can be used for preparing high-concentration alkali liquor by cooking, and further producing flake alkali. The liquid caustic soda just discharged from the furnace is cooled by the caustic soda flake machine to become caustic soda flake, and the temperature of the caustic soda flake is very high at the moment. In order to prevent the packaging bag from being scalded by the caustic soda flakes, the temperature of the caustic soda flakes is cooled by water. After the discharging device for caustic soda flakes is used for a period of time, the inner wall of the discharging device can be bonded, and if the discharging device is not cleaned, the operation of the discharging device can be influenced. The discharge device for caustic soda flakes is therefore cleaned. The waste water after washing is alkaline, and in order to save water, the waste water after washing can be used as cooling circulating water in a flake caustic soda circulating cooling water system for cooling flake caustic soda. Meanwhile, dust generated in the production process of flake caustic soda falls into circulating water, so that the alkalinity of the water is increased. In the past, the circulating water can corrode the pipeline and can cause certain potential safety hazards to workers.

Disclosure of Invention

In view of the above, there is a need for a combined production system for semi coke and flake caustic soda, which can reduce production cost and is environmentally friendly.

A semi-coke and flake caustic soda combined production system comprises a semi-coke dry distillation system and a flake caustic soda production system, wherein the semi-coke dry distillation system comprises a coal preparation device, a dry distillation device and a coke screening device, a discharge port of the coal preparation device is connected with a feed inlet of the dry distillation device, a coke outlet of the dry distillation device is connected with a feed inlet of the coke screening device, a gas outlet of the dry distillation device is connected with the flake caustic soda production system to provide gas, the flake caustic soda production system comprises a gas furnace, an alkali dissolving elevated tank, an alkali liquor storage tank, a flake caustic soda machine and a circulating cooling water system, a gas outlet of the dry distillation device is communicated with a fuel inlet of the gas furnace to supply the gas, the alkali dissolving elevated tank is erected on the gas furnace to heat the alkali liquor, a liquid caustic soda discharging port of the alkali dissolving elevated tank is connected with the feed inlet of the flake caustic soda machine to prepare the molten liquid caustic soda into flake caustic soda, and the circulating cooling, the exhaust port of the gas furnace is connected with a circulating cooling water system so as to neutralize the burnt gas with alkaline solutes in the circulating cooling water system.

Preferably, recirculating cooling water system includes heat transfer pond, water inlet pipe, outlet conduit, spray piping, water receiving tank, the delivery port and the water inlet intercommunication of outlet conduit in heat transfer pond, outlet conduit's delivery port and spray piping's water inlet intercommunication, spray piping is equipped with a plurality of mouths that spray, the mouth that sprays is located the wafer machine directly over to spray the cooling to the wafer machine, the water receiving tank is located the wafer machine directly under, in order to be used for the water after the cooling and wash the log raft income water receiving tank of wafer machine, the delivery port and the water inlet intercommunication of water inlet pipe of water receiving tank, the delivery port and the water inlet intercommunication in heat transfer pond of water inlet pipe, so that the water after the heat transfer passes through the heat transfer pond cooling.

Preferably, the circulating cooling water system further comprises a washing gas spray cooling chamber to remove solid particles and acid gas in the flue gas, the washing gas spray cooling chamber comprises a circular truncated cone-shaped shell, a smoke exhaust fan, a spray pipe network, a booster pump and a flue gas pipeline, the circular truncated cone-shaped shell is positioned right above the heat exchange water tank, the upper end of the circular truncated cone-shaped shell is a flue gas discharge port, the lower end of the circular truncated cone-shaped shell is a spray water outlet, the smoke exhaust fan is arranged at the flue gas discharge port, the spray pipe network is positioned right below the smoke exhaust fan, a water inlet of the spray pipe network is communicated with a water outlet of the heat exchange water tank through a pipeline, the booster pump is arranged on the pipeline between the spray pipe network and the heat exchange water tank, the flue gas pipe network is positioned right below the spray pipe network, an air inlet of the flue gas pipe network is communicated with a smoke discharge port of the gas furnace through a, the smoke vent is downward to prevent spray water from entering the smoke pipe network.

Preferably, the dry distillation device comprises a dry distillation square furnace and a semi-coke coal conveying unit, the dry distillation square furnace is positioned above the semi-coke coal conveying unit, the conveying unit comprises a push plate mechanism, a scraper conveying mechanism, a conical chute, a sealing cover and a drying mechanism, the push plate mechanism is mounted at the bottom of the inner side 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 piece to scrape the semi-coke coal in the furnace body from a discharge hole at the bottom of the furnace body, the scraper conveying mechanism comprises a first conveying section, a second conveying section and scraper components mounted in the first conveying section and the second conveying section and used for conveying the semi-coke coal, one end of the chute is communicated with the discharge hole at the bottom of the dry distillation square furnace, the other end of the chute is communicated with the first conveying section to enable the semi-coke coal in the dry distillation square furnace to fall into the first conveying section through the chute, the first conveying section is filled with water, one end of the chute corresponding to the first conveying section is positioned in a water seal in the first conveying section so that gas in the furnace body can not be discharged from the end part of the chute, the scraper component in the first conveying section is in a water seal state so that semi-coke coal in the first conveying section is isolated from air, the first conveying section is arranged in a sealing cover, the top of the sealing cover is communicated with one end of the chute corresponding to the first conveying section, one end of the second conveying section is communicated with one end of the first conveying section, the other end of the second conveying section is communicated with a coke screening device, the second conveying section is arranged in a drying mechanism so as to dry the semi-coke coal, the drying mechanism comprises a hot air pipe, a hot air blower, a dust cover and a dust screen, one end of the hot air pipe is laid in a snake shape in a heat exchange water tank, and the other end of the hot air pipe is communicated with an air inlet of the hot air blower, the air outlet of the air heater is arranged on the side wall of the dust cover, the second conveying section is arranged in the dust cover, the semi-coking coal is dried through hot air, and the dust screen is arranged on the side wall of the dust cover opposite to the air outlet of the air heater, so that the coal ash is prevented from being blown to the external environment and blowing out wet air.

Has the advantages that: the utility model discloses a blue charcoal, caustic soda flake joint production system include blue charcoal dry distillation system, caustic soda flake production system, blue charcoal dry distillation system is including being equipped with coal device, dry distillation device, sieve burnt device, caustic soda flake production system includes the gas furnace, dissolves alkali elevated tank, alkali lye storage jar, caustic soda flake machine, recirculating cooling water system, and the coal gas of blue charcoal dry distillation system production is used for the fuel of caustic soda flake production system, and the waste gas after the burning can the coolant water of the recirculating cooling water system of caustic soda flake production system to reduce or avoid the corruption of pipeline. And circulating water of the flake caustic soda combined production system and a drying mechanism of the semi-coke dry distillation system exchange heat with each other, so that the drying cost can be reduced, and the heat exchange efficiency of the flake caustic soda combined production system can be accelerated.

Drawings

FIG. 1 is a functional block diagram of the combined production system for semi-coke and flake caustic soda of the present invention.

FIG. 2 is a process flow diagram of the combined production system for semi-coke and flake caustic soda of the present invention.

Fig. 3 is a schematic structural view of the scrubbing spray cooling chamber of the present invention.

In the figure: the combined production system 10 for semi-coke and flake caustic soda, the semi-coke dry distillation system 20, the coal preparation device 201, the dry distillation device 202, the dry distillation square furnace 2021, the semi-coking coal conveying unit 2022, the push plate mechanism 20221, the scraper conveying mechanism 20222, the conical chute 20223, the sealing cover 20224, the drying mechanism 20225, the coke screening device 203, the flake caustic soda production system 30, the gas furnace 301, the alkali dissolving head tank 302, the alkali liquor storage tank 303, the flake caustic soda machine 304, the circulating cooling water system 305, the heat exchange water tank 3051, the water inlet pipeline 3052, the water outlet pipeline 3053, the spray pipeline 3054, the water receiving tank 3055, the gas washing spray cooling chamber 3056, the circular truncated cone-shaped shell 30561, the smoke exhaust fan 30562, the spray pipe network 30563, the booster pump 64 and the smoke pipeline 30565.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Referring to fig. 1 and 2, a combined production system 10 for semi-coke and flake caustic soda includes a semi-coke dry distillation system 20 and a flake 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, a discharge port of the coal preparation device 201 is connected with a feed port of the dry distillation device 202, a coke outlet of the dry distillation device 202 is connected with a feed port of the coke screening device 203, an air outlet of the dry distillation device 202 is connected with the flake caustic soda production system 30 to provide fuel gas, the flake caustic soda production system 30 includes a gas furnace 301, a soluble soda head tank 302, an alkali lye storage tank 303, a flake caustic soda machine 304 and a circulating cooling water system 305, an air outlet of the dry distillation device 202 is communicated with a fuel inlet of the gas furnace 301 to supply fuel gas, the soluble soda head tank 302 is erected on the gas furnace 301 to heat alkali lye, a liquid caustic soda discharge port of the soluble soda head tank 302 is connected with a feed port of, the circulating cooling water system 305 cools the flake caustic machine 304, and the exhaust port of the gas furnace 301 is connected with the circulating cooling water system 305 so as to neutralize the combusted gas and the alkaline solute in the circulating cooling water system 305.

Coal preparation device 201 relates to the outfit of coal, smashes, screening and carries, because coal preparation device 201 is very mature in the middle of the coal chemical industry, and this scheme does not relate to the coal preparation link, therefore the structure of coal preparation device 201 is not restated. The coke screening device 203 is mainly used for screening semi-coking coal, belongs to an indispensable device in a coal dry distillation system, is mature, and does not relate to a coke screening link, so the structure of the coke screening device 203 is not repeated.

Further, the circulating cooling water system 305 comprises a heat exchange water pool 3051, a water inlet pipeline 3052, a water outlet pipeline 3053, a spraying pipeline 3054 and a water receiving tank 3055, wherein the heat exchange water pool 3051 is communicated with an exhaust port of the gas furnace 301, so as to discharge the combusted gas into a water inlet, a water outlet of the heat exchange water pool 3051 is communicated with a water inlet of a water outlet pipeline 3053, a water outlet of the water outlet pipeline 3053 is communicated with a water inlet of a spray pipeline 3054, the spray pipeline 3054 is provided with a plurality of spray ports which are positioned right above the caustic soda flake machine 304, so as to spray and cool the caustic soda flake machine 304, the water receiving tank 3055 is positioned right below the caustic soda flake machine 304, the water collecting tank 3055 is used for discharging water used for cooling and water used for cleaning the caustic soda slicing machine 304, a water outlet of the water collecting tank 3055 is communicated with a water inlet of the water inlet pipeline 3052, a water outlet of the water inlet pipeline 3052 is communicated with a water inlet of the heat exchange water pool 3051, and therefore the water after heat exchange is cooled through the heat exchange water pool 3051.

Further, please refer to fig. 3, the circulating cooling water system further includes a washing gas spray cooling chamber 3056 for removing solid particles and acidic gas in the flue gas, the washing gas spray cooling chamber 3056 includes a circular truncated cone-shaped shell 30561, a smoke exhaust fan 30562, a spray pipe network 30563, a booster pump 30564 and a flue gas pipe 30565, the circular truncated cone-shaped shell 30561 is located right above the heat exchange water tank, the upper end of the circular truncated cone-shaped shell 30561 is a flue gas discharge port, the lower end of the circular truncated cone-shaped shell 30561 is a spray water outlet, the smoke exhaust fan 30562 is arranged at the flue gas discharge port, the spray pipe network 30563 is located right below the smoke exhaust fan 30562, a water inlet of the spray pipe network 30563 is communicated with a water outlet of the heat exchange water tank through a pipe, the booster pump 30564 is arranged on a pipe between the spray pipe network 30563 and the heat exchange water tank, the flue gas pipe network is located right below the spray pipe network 30563, a pipe, so as to wash the flue gas through the spray water in the process of discharging fume, a plurality of fume exhaust holes are arranged on the flue gas pipe network, and the direction of the fume exhaust holes is downward, so as to prevent the spray water from entering the flue gas pipe network.

The scrubbing spray cooling chamber 3056 serves three purposes. The first function is to absorb harmful gas and solid particles in the flue gas, such as sulfur dioxide, and the second function is to neutralize the acidic gas in the flue gas and the alkaline substance in the cooling water, thereby lowering the pH value of the cooling water and reducing the corrosion of the cooling water to the pipeline. The third function is to dissipate heat by spraying. In summer, the environmental temperature is higher, and the efficiency of pond natural heat transfer is lower. The heat dissipation can be accelerated through the spraying mode. And the cooling chamber can also shield sunlight, further strengthen the heat dissipation. The top of the scrubbing spray cooling chamber 3056 is also provided with a smoke exhaust fan 30562. So, can utilize the velocity of flow of negative pressure reinforcing air current, be favorable to discharging fume fast and dispel the heat.

Further, the dry distillation device 202 comprises a dry distillation square furnace 2021 and a semi-coke coal conveying unit 2022, the dry distillation square furnace 2021 is located above the semi-coke coal conveying unit 2022, the conveying unit comprises a push plate mechanism 20221, a scraper conveying mechanism 20222, a conical chute 20223, a sealing cover 20224 and a drying mechanism 20225, the push plate mechanism 20221 is mounted at the inner bottom of the dry distillation square furnace 2021, the push plate mechanism 20221 reciprocates left and right on the bottom of the furnace body under the action of a reciprocating driving element to scrape the semi-coke coal in the furnace body from a discharge port at the bottom of the furnace body, the scraper conveying mechanism 20222 comprises a first conveying section, a second conveying section and a scraper component mounted in the first conveying section and the second conveying section to convey the semi-coke coal, one end of the chute is communicated with the discharge port at the bottom of the dry distillation square furnace 2021, the other end of the chute is communicated with the first conveying section to enable the semi-coke coal in the dry distillation square furnace 2021 to fall into the first conveying section through the chute, the first conveying section is filled with water, one end of the chute corresponding to the first conveying section is positioned in a water seal in the first conveying section so that gas in the furnace body can not be discharged from the end part of the chute, the scraper component in the first conveying section is in a water seal state so that semi-coke coal in the first conveying section is isolated from air, the first conveying section is arranged in a sealing cover 20224, the top of the sealing cover 20224 is communicated with one end of the chute corresponding to the first conveying section, one end of the second conveying section is communicated with one end of the first conveying section, the other end of the second conveying section is communicated with a coke screening device 203, the second conveying section is arranged in a drying mechanism 20225 so as to dry the semi-coke coal, the drying mechanism 20225 comprises a hot air pipe, a hot air blower, a dust cover and a dust screen, one end of the hot air pipe is laid in a snake shape in a heat exchange water pool 3051, and the other end of the hot air pipe is communicated with an air inlet of the hot air blower, the air outlet of the air heater is arranged on the side wall of the dust cover, the second conveying section is arranged in the dust cover, the semi-coking coal is dried through hot air, and the dust screen is arranged on the side wall of the dust cover opposite to the air outlet of the air heater, so that the coal ash is prevented from being blown to the external environment and blowing out wet air.

The utility model discloses to blue charcoal dry distillation system 20 and the respective production characteristics of flake caustic soda production system 30, combine the production technology of the two, effectively utilize the unfriendly acid gas of environment that produces among the blue charcoal dry distillation process, and the alkaline characteristics of the recirculated cooling water of flake caustic soda, make the mixture with the two, the coal gas that makes the blue charcoal of production produce is as the fuel of flake caustic soda production usefulness, tail gas after the gas combustion is absorbed by the circulating water, harmful acid gas in the tail gas has both been eliminated, can reduce or avoid the alkaline recirculated cooling water corrosion pipeline of flake caustic soda again. Meanwhile, the flake caustic soda circulating cooling water can be used as spray water in the semi-coke gas purification process, so that the utilization rate of the circulating cooling water is improved; and the waste heat generated by the circulating cooling water of caustic soda flakes can be used as a heat source for drying gas in the steps of semi-coke dry distillation and coke screening, so that the utilization of heat energy is improved, the comprehensive production cost of enterprises is reduced, and the enterprise income is improved.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A semi coke, caustic soda flakes joint production system which characterized in that: the semi-coke dry distillation system comprises a semi-coke dry distillation system and a flake caustic soda production system, wherein the semi-coke dry distillation system comprises a coal preparation device, a dry distillation device and a coke screening device, a discharge port of the coal preparation device is connected with a feed port of the dry distillation device, a coke outlet of the dry distillation device is connected with a feed port of the coke screening device, a gas outlet of the dry distillation device is connected with the flake caustic soda production system to provide fuel gas, the flake caustic soda production system comprises a gas furnace, an alkali dissolving head tank, an alkali storage tank, an alkali flake machine and a circulating cooling water system, a gas outlet of the dry distillation device is communicated with a fuel inlet of the gas furnace to supply the fuel gas, the alkali dissolving head tank is erected on the gas furnace to heat the alkali liquor, a liquid caustic soda discharge port of the alkali dissolving head tank is connected with the feed port of the alkali flake machine to prepare molten liquid caustic soda into flake caustic soda, the circulating cooling water system cools the alkali flake machine, so that the combusted gas is neutralized with alkaline solutes in the recirculating cooling water system.

2. The combined semi-coke and flake caustic production system of claim 1, wherein: the circulating cooling water system comprises a heat exchange water tank, a water inlet pipeline, a water outlet pipeline, a spray pipeline and a water receiving tank, wherein the heat exchange water tank is communicated with a gas exhaust port of a gas furnace to discharge combusted gas into a water inlet, the water outlet of the heat exchange water tank is communicated with the water inlet of the water outlet pipeline, the water outlet of the water outlet pipeline is communicated with the water inlet of the spray pipeline, the spray pipeline is provided with a plurality of spray ports, the spray ports are located right above a flake caustic soda machine to spray and cool the flake caustic soda machine, the water receiving tank is located right below the flake caustic soda machine to discharge water used for cooling and cleaning the flake caustic soda machine into the water receiving tank, the water outlet of the water receiving tank is communicated with the water inlet of the water inlet pipeline, and the water outlet of the water inlet pipeline is communicated with the water inlet of the heat exchange.

3. The combined semi-coke and flake caustic production system of claim 2, wherein: the circulating cooling water system also comprises a gas washing spray cooling chamber for removing solid particles and acid gas in the flue gas, the gas washing spray cooling chamber comprises a circular truncated cone-shaped shell, a smoke exhaust fan, a spray pipe network, a booster pump and a flue gas pipeline, the circular truncated cone-shaped shell is positioned right above a heat exchange water pool, the upper end of the circular truncated cone-shaped shell is a flue gas discharge port, the lower end of the circular truncated cone-shaped shell is a spray water outlet, the smoke exhaust fan is arranged at the flue gas discharge port, the spray pipe network is positioned right below the smoke exhaust fan, a water inlet of the spray pipe network is communicated with a water outlet of the heat exchange water pool through a pipeline, the booster pump is arranged on the pipeline between the spray pipe network and the heat exchange water pool, the flue gas pipe network is positioned right below the spray pipe network, an air inlet of the flue gas pipe network is communicated with a flue gas discharge port of a gas furnace, the smoke vent is downward to prevent spray water from entering the smoke pipe network.

4. The combined semi-coke and flake caustic production system of claim 3, wherein: the dry distillation device comprises a dry distillation square furnace and a semi-coking coal conveying unit, the dry distillation square furnace is positioned above the semi-coking coal conveying unit, the conveying unit comprises a push plate mechanism, a scraper conveying mechanism, a conical chute, a sealing cover and a drying mechanism, the push plate mechanism is arranged at the bottom of the inner side 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 piece to scrape the semi-coking coal in the furnace body from a discharge hole at the bottom of the furnace body, the scraper conveying mechanism comprises a first conveying section, a second conveying section and scraper components which are arranged in the first conveying section and the second conveying section and are used for conveying the semi-coking coal, one end of the chute is communicated with a discharge hole at the bottom of the dry distillation square furnace, the other end of the chute is communicated with the first conveying section so that the semi-coking coal in the dry distillation square furnace falls into the first conveying section through the chute, water is injected into the first conveying section, one end of the chute corresponding to the first conveying section is arranged in a water seal in the first conveying section, so that gas in the furnace body cannot be discharged from the end part of the chute, the scraper component in the first conveying section is in a water seal state, so that semi-coke coal in the first conveying section is isolated from air, the first conveying section is arranged in a sealing cover, the top of the sealing cover is communicated with one end of the chute corresponding to the first conveying section, one end of the second conveying section is communicated with one end of the first conveying section, the other end of the second conveying section is communicated with a coke screening device, the second conveying section is arranged in a drying mechanism in the drying mechanism, so that the semi-coke coal is dried, the drying mechanism comprises a hot air pipe, a hot air blower, a dust cover and a dust screen, one end of the hot air pipe is laid in the heat exchange water tank in a snake shape, the other end of the hot air pipe is communicated with an air inlet of the hot air blower, and an air outlet of the hot air blower is arranged, the second conveying section is arranged in the dust cover to dry the semicoke through hot air, and the side wall of the dust cover opposite to the air outlet of the air heater is provided with a dust screen to prevent the coal ash from being blown into the external environment and blow out wet air.