CN112480940A - Semicoke indirect heat exchange coke quenching device and method capable of automatically adjusting cold medium circulation speed - Google Patents
Semicoke indirect heat exchange coke quenching device and method capable of automatically adjusting cold medium circulation speed Download PDFInfo
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- CN112480940A CN112480940A CN202011370907.9A CN202011370907A CN112480940A CN 112480940 A CN112480940 A CN 112480940A CN 202011370907 A CN202011370907 A CN 202011370907A CN 112480940 A CN112480940 A CN 112480940A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
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Abstract
The invention relates to a semicoke indirect heat exchange coke quenching device and a method for automatically adjusting a cold medium circulation speed, wherein the coke quenching device consists of an indirect cooling water circulation system and an automatic control system; high-temperature hot semicoke generated by the reaction of raw coal of the carbonization furnace in the carbonization section is moved down to the cooling section to be indirectly cooled by circulating water in a water jacket around the discharge port in a heat exchange manner, so that the coke quenching process is completed. And a plurality of temperature sensors are arranged at the coke outlet of the cooling section, and the circulating amount of circulating cooling water is automatically adjusted according to the temperature feedback of the semicoke at the coke outlet, so that the temperature of the semicoke entering the coke box at the bottom of the furnace can reach the required temperature value. The stability of the quality of the semicoke product is ensured, the influence on the service life of the equipment due to high temperature is avoided, and the running safety of the equipment can be ensured; the high-temperature circulating water can be used for heating or industrial heating, so that the heat energy can be recycled; the method adopts totally-enclosed indirect heat exchange in the coke quenching process, does not generate pollutants such as Volatile Organic Compounds (VOCs), coke quenching wastewater and the like, and is favorable for environmental protection; the temperature of the cooled semicoke is monitored in real time, the flow of the cooling medium is automatically adjusted, and the product quality is ensured.
Description
Technical Field
The invention belongs to the technical field of coal chemical industry, and particularly relates to a semi-coke quenching and cooling method.
Background
The low-rank coal in China is rich in resources, over 50 percent of the coal reserves are proved to be low-rank coal, and the low-rank coal is clean, efficient and comprehensively converted and utilized as a fossil energy resource and is a future development direction. The poly-generation or graded quality-divided utilization based on coal dry distillation accords with the principles of clean, efficient and comprehensive conversion utilization, is concerned by research developers, and the coal dry distillation as a main process unit is concerned more. The semicoke is used as a main product of the coal dry distillation process, the quality directly determines the economic benefit of an enterprise, and the method can effectively improve the quality of the semicoke and thoroughly solve the defect of high water content.
At present, the methods for cooling the semicoke mainly comprise processes of water quenching, low-moisture quenching, inert gas quenching and the like, and any process has certain disadvantages. The water quenching mainly has the defects of water resource waste, large environmental pollution, high water content of products and the like; the low-moisture coke quenching mainly has the defects of water resource waste and high moisture content of products; the inert gas quenching mainly has the defect of high cost.
At present, the existing semicoke quenching technology mainly has the problems of poor product quality, poor environmental protection, large water consumption and the like. Chinese patent 'Low moisture coke quenching device and coke quenching method using the same' (application number: 201410350449.0) provides a semi-coke low moisture coke quenching technology, which adopts the method that a small amount of cooling water is directly sprayed on hot semi-coke, and coke quenching is carried out after a large amount of steam is generated, so that the consumption of the cooling water can be greatly reduced, and resources are saved. However, this invention has not yet overcome the following drawbacks: 1. the coke quenching section of the coke quenching device is in an interlayer form and is provided with the nozzle, so that the coke quenching device is easy to block in the operation process and has a complex structure; 2. because a small amount of water is sprayed, the product contains a part of water, and the quality of the product is influenced to a certain extent; 3. although the water consumption is small, a part of water resources are consumed, and the operation cost is high; 4. harmful gases and dust such as Volatile Organic Compounds (VOCs) and the like are generated in the coke quenching process, and simultaneously, sewage is generated in the coke quenching process, so that the environment is polluted.
Disclosure of Invention
The invention aims to provide a semicoke indirect heat exchange coke quenching device and method capable of automatically adjusting a cold medium circulation speed, aiming at the problems of the existing coke quenching process. The coke quenching device consists of an indirect cooling system and an automatic control system; the high-temperature hot semicoke generated by the carbonization reaction in the carbonization furnace slowly moves downwards under the action of gravity to enter a coke quenching section, in the coke quenching section, the coke quenching section indirectly exchanges heat with circulating cooling water in a water jacket around a discharge port, the temperature is gradually reduced to finish coke quenching, and the coke quenching is discharged into a coke discharge box at the bottom of the furnace from a coke outlet. Set up a plurality of temperature sensor in cooling zone coke outlet department, according to the temperature feedback of coke outlet semicoke, the circulation volume of automatically regulated recirculated cooling water guarantees that the semicoke temperature that gets into stove bottom coke box reaches the temperature value of requirement, has both been favorable to guaranteeing the stability of semicoke product quality, can also protect coke discharging box and other relevant equipment and avoid influencing its life because of high temperature, can ensure the security of equipment operation simultaneously.
The invention relates to a semicoke indirect heat exchange coke quenching device capable of automatically adjusting cold medium circulation speed, which consists of a dry distillation section (2) of a dry distillation furnace, a cooling section (4) of the dry distillation furnace and a coke discharging box (7) at the bottom of the dry distillation furnace;
an indirect cooling water circulation system and an automatic control system are arranged at the cooling section (4) of the retort, the indirect cooling water circulation system comprises a cooling pipe (3), a jacket water sump (5), a circulating water outlet (9) and a circulating water inlet (10), the cooling pipe (3) is arranged in the jacket water sump (5), the bottom outlet of the cooling pipe (3) is communicated with a furnace bottom coke discharging box (7), the bottom of the furnace bottom coke discharging box (7) is provided with a coke discharging port (17), and the side wall of the jacket water sump (5) is provided with the circulating water outlet (9) and the circulating water inlet (10);
the automatic control system comprises a temperature sensor (6), a circulating water pump (11), a circulating water regulating valve (12), a circulating water tank (13) and a control unit (15), wherein: the temperature sensor (6) is arranged in the cooling pipe (3) and is electrically connected with a signal input end of the control unit (15) through a signal line, the circulating water regulating valve (12) is electrically connected with a control end of the control unit (15) through a control line, a water inlet end of the circulating water pump (11) is communicated with the circulating water tank (13), a water outlet end of the circulating water pump is communicated with a circulating water inlet (10) of the jacket water bin (5), and a circulating water outlet (9) of the jacket water bin (5) is communicated with the circulating water tank (13);
the side wall of the coke discharging box (7) at the bottom of the furnace is provided with an explosion-proof hole (14).
The side walls of the furnace bodies (16) at two sides of the dry distillation section (2) of the retort furnace are provided with a plurality of burning nozzles (8).
The upper end opening of the cooling pipe (3) is provided with a horn-shaped cooling pipe feed opening (3.1).
The invention relates to a semicoke indirect heat exchange coke quenching method capable of automatically adjusting cold medium circulation speed, which specifically adopts the following indirect heat exchange coke quenching process steps:
step 1: raw coal is conveyed into a retort furnace top bin (1) by conveying equipment such as a belt conveyor and the like;
step 2: raw material coal in the bin slowly moves downwards to enter a furnace body (16), and is heated to the temperature of 500-700 ℃ by high-temperature flame sprayed by a combustion burner (8) in a dry distillation section (2) of the dry distillation furnace and subjected to dry distillation reaction to generate high-temperature semicoke;
and step 3: the high-temperature semicoke slowly moves downwards, enters the cooling pipe (3) through the cooling pipe feed opening (3.1) and continuously and slowly moves downwards to indirectly exchange heat with the circulating cooling water in the jacket water bin (5), so that the temperature of the semicoke is reduced;
and 4, step 4: the temperature sensor (6) arranged in the cooling pipe (3) transmits semi-coke temperature data at the outlet of the cooling pipe (3) to the control unit (15) in real time, compares the semi-coke temperature data with a coke quenching temperature threshold value preset in the control unit (15), sends out a corresponding control instruction in real time, adjusts the opening degree of the circulating water adjusting valve (12), and ensures that the semi-coke temperature is kept in a coke quenching temperature range meeting the requirement by adjusting the flow rate of the circulating water around the cooling pipe (3);
and 5: the cooled semicoke falls into a coke discharging box (7) at the bottom of the furnace from the lower port of the cooling pipe (3) and is discharged from a coke discharging port (17).
Compared with the prior art of low-temperature dry distillation and coke quenching in coal, the invention has the beneficial effects that:
(1) the product quality is good, the moisture content in the semi-coke product is theoretically zero, the semi-coke belongs to anhydrous semi-coke in the true sense, and the additional value is high;
(2) the environment-friendly performance is good, because an indirect heat exchange cooling method is adopted, and a fully-closed system is adopted in the coke discharging process, harmful gases such as Volatile Organic Compounds (VOCs) and the like are not generated in the coke quenching process, dust is not generated, the pollution to the environment caused by unorganized discharge is reduced, and in addition, sewage is not generated in the coke quenching process;
(3) water resources are saved, and because the indirect heat exchange cooling of circulating water is adopted, the water consumption is low;
(4) the heat energy recycling rate is high, and high-temperature circulating water generated after heat exchange with semicoke can be used for civil heating, industrial heat sources and the like, so that the heat energy is reasonably utilized;
(5) the degree of automation is high, and the flow rate of circulating water is adjusted to control the coke discharging temperature in real time, so that the product quality is stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic sectional view of a semicoke cooling apparatus of the present invention;
FIG. 2 is a schematic cross-sectional view of the retort section (2) of the present invention;
FIG. 3 is a schematic cross-sectional view of the cooling section (4) of the retort of the present invention.
Legend: 1. the system comprises a retort furnace top bin, 2, a retort furnace dry distillation section, 3, a cooling pipe, 3.1, a cooling pipe feed opening, 4, a retort furnace cooling section, 5, a jacket water bin, 6, a temperature sensor, 7, a furnace bottom coke discharging box, 8, a combustion burner, 9, a circulating water outlet, 10, a circulating water inlet, 11, a circulating water pump, 12, a circulating water regulating valve, 13, a circulating water tank, 14, an explosion-proof hole, 15, a control unit, 16, a furnace body, 17 and a coke discharging opening.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention is described in detail below with reference to the embodiments. The examples given are for better understanding of the invention and are not intended to limit the invention. The components and materials used in the examples are commercially available unless otherwise specified.
Examples
As shown in fig. 1, 2 and 3, the coke quenching device and the method for indirectly exchanging heat of semicoke for automatically adjusting the circulation speed of cold medium, provided by the invention, comprises a dry distillation section 2 of a dry distillation furnace and a cooling section 4 of the dry distillation furnace, wherein a row of combustion nozzles 8 are respectively arranged on the side walls of a furnace body 16 at two sides of the dry distillation section 2 of the dry distillation furnace, and high-temperature flame is sprayed to raw material coal to heat the raw material coal and generate dry distillation reaction; the high-temperature hot semicoke generated by the dry distillation reaction in the dry distillation section 2 of the dry distillation furnace slowly moves downwards under the action of gravity to enter a cooling section 4 of the dry distillation furnace; an indirect cooling water circulation system and an automatic control system are arranged at the cooling section 4 of the retort furnace, and the indirect heat exchange is carried out between the indirect cooling water circulation system and the circulating cooling water in the water jackets around the cooling pipe 3, the temperature is gradually reduced to finish coke quenching, and the coke is discharged into a coke discharging box 7 at the bottom of the furnace from an outlet at the lower end of the cooling pipe 3.
The indirect cooling water circulation system comprises a cooling pipe 3, a jacket water bin 5, a circulating water outlet 9 and a circulating water inlet 10; the cooling pipe 3 is arranged in the jacket water sump 5, a horn-shaped cooling pipe blanking port 3.1 is arranged at the upper end port of the cooling pipe 3, the bottom end outlet of the cooling pipe 3 is introduced into the furnace bottom coke discharging box 7, the bottom end of the furnace bottom coke discharging box 7 is provided with a coke discharging port 17, and the side wall of the jacket water sump 5 is provided with a circulating water outlet 9 and a circulating water inlet 10; wherein: the height of the cooling section 4 of the retort is enough to ensure the material sealing height at the lower end, and the coal gas generated by the reaction of the retort 2 in the hearth is ensured not to escape downwards due to the large material resistance at the lower part; the side wall of the furnace bottom coke discharging box 7 is provided with the explosion-proof hole 14, and the explosion-proof hole 14 can avoid the risk of explosion caused by the increase of the pressure of a coke groove due to the downward channeling of the hearth gas under the emergency because the furnace bottom coke discharging box 7 is in a relatively sealed state.
The automatic control system is provided with a plurality of temperature sensors 6 at a coke outlet of the cooling section, automatically adjusts the circulation amount of circulating cooling water according to the temperature feedback of the semicoke at the discharge port, ensures that the temperature of the semicoke entering the furnace bottom coke discharging box 7 reaches a required temperature value, ensures that the discharge temperature is relatively constant, is beneficial to ensuring the stability of the quality of semicoke products, can also protect the coke discharging box and other related equipment from influencing the service life of the semicoke discharging box due to high temperature, and can ensure the safety of the operation of the equipment; the automatic control system comprises a temperature sensor 6, a circulating water pump 11, a circulating water regulating valve 12, a circulating water tank 13 and a control unit 15, wherein: the temperature sensor 6 is arranged at the tail end of the cooling pipe 3, is electrically connected with the signal input end of the control unit 15 through a signal wire, transmits semi-coke temperature data at the tail end of the cooling pipe 3 to the control unit 15 in real time, and carries out heat insulation and waterproof treatment on the signal wire in the furnace body 16; the circulating water regulating valve 12 is electrically connected with a control end of the control unit 15 through a control line, and the control unit 15 adjusts working parameters of the circulating water regulating valve 12 in real time according to the semicoke temperature parameters and adjusts the circulating water to achieve the flow required by controlling the semicoke temperature; the water inlet end of the circulating water pump 11 is communicated with the circulating water tank 13, the water outlet end of the circulating water pump is communicated with the circulating water inlet 10 of the jacket water bin 5, the circulating water outlet 9 of the jacket water bin 5 is communicated with the circulating water tank 13, water in the circulating water tank 13 is pressurized by the circulating water pump 11, enters the jacket water bin 5 from the circulating water inlet 10 after being regulated by the circulating water regulating valve 12, is discharged from the circulating water outlet 9 after exchanging heat with high-temperature semicoke, can be heated or subjected to industrial heating and recycling temperature reduction, and then returns to the circulating water tank 13, so that the purpose of recycling is achieved.
The invention relates to a semicoke indirect heat exchange coke quenching method capable of automatically adjusting cold medium circulation speed, which specifically adopts the following indirect heat exchange coke quenching process steps:
the coke quenching process comprises the following specific steps:
step 1: conveying raw coal into a retort furnace top bin 1 by conveying equipment such as a belt conveyor and the like;
step 2: the raw material coal in the bin slowly moves downwards to enter the furnace body 16, and is heated to the temperature of 500-700 ℃ by high-temperature flame sprayed by the combustion burner 8 in the dry distillation section 2 of the dry distillation furnace and undergoes dry distillation reaction to generate high-temperature semicoke;
and step 3: the high-temperature semicoke slowly moves downwards, enters the cooling pipe 3 through the cooling pipe feed opening 3.1 and continuously moves downwards slowly, and indirectly exchanges heat with the circulating cooling water in the jacket water bin 5 to reduce the temperature of the semicoke;
and 4, step 4: the temperature sensor 6 arranged in the cooling pipe 3 transmits the semicoke temperature data at the outlet of the cooling pipe 3 to the control unit 15 in real time, the control unit 15 compares the semicoke temperature data with a preset quenching temperature threshold value, sends out a corresponding control instruction in real time, adjusts the opening of the circulating water adjusting valve 12, and ensures that the semicoke temperature is kept in a required quenching temperature range by adjusting the flow of the circulating water around the cooling pipe 3;
and 5: the cooled semicoke falls into the hearth coke discharging box 7 from the lower port of the cooling pipe 3 and is discharged from the coke discharging port 17.
The invention can adjust the number of the cooling pipes according to the actual requirement, thereby realizing the adjustment of the specific surface area of the material heat exchange in the cooling section. The scale of the device is flexibly adjusted, and the applicability of the device is enhanced.
The above description is only for the preferred embodiment of the present invention, and should not be used to limit the scope of the claims of the present invention. While the foregoing description will be understood and appreciated by those skilled in the relevant art, other equivalents may be made thereto without departing from the scope of the claims.
Claims (5)
1. A semi-coke indirect heat exchange coke quenching device capable of automatically adjusting the circulation speed of a cold medium is composed of a dry distillation section (2) of a dry distillation furnace, a cooling section (4) of the dry distillation furnace and a coke discharging box (7) at the bottom of the furnace; an indirect cooling water circulation system and an automatic control system are arranged at the cooling section (4) of the retort, the indirect cooling water circulation system comprises a cooling pipe (3), a jacket water sump (5), a circulating water outlet (9) and a circulating water inlet (10), the cooling pipe (3) is arranged in the jacket water sump (5), the bottom outlet of the cooling pipe (3) is communicated with a furnace bottom coke discharging box (7), the bottom of the furnace bottom coke discharging box (7) is provided with a coke discharging port (17), and the side wall of the jacket water sump (5) is provided with the circulating water outlet (9) and the circulating water inlet (10); the method is characterized in that: the automatic control system comprises a temperature sensor (6), a circulating water pump (11), a circulating water regulating valve (12), a circulating water tank (13) and a control unit (15), wherein: the temperature sensor (6) is arranged in the cooling pipe (3) and is electrically connected with a signal input end of the control unit (15) through a signal line, the circulating water regulating valve (12) is electrically connected with a control end of the control unit (15) through a control line, a water inlet end of the circulating water pump (11) is communicated with the circulating water tank (13), a water outlet end of the circulating water pump is communicated with a circulating water inlet (10) of the jacket water bin (5), and a circulating water outlet (9) of the jacket water bin (5) is communicated with the circulating water tank (13).
2. The semicoke indirect heat exchange quenching device capable of automatically adjusting the circulation speed of the cold medium as claimed in claim 1, wherein: the side wall of the coke discharging box (7) at the bottom of the furnace is provided with an explosion-proof hole (14).
3. The semicoke indirect heat exchange quenching device capable of automatically adjusting the circulation speed of the cold medium as claimed in claim 1, wherein: the side walls of the furnace bodies (16) at two sides of the dry distillation section (2) of the retort furnace are provided with a plurality of burning nozzles (8).
4. The semicoke indirect heat exchange quenching device capable of automatically adjusting the circulation speed of the cold medium as claimed in claim 1, wherein: the upper end opening of the cooling pipe (3) is provided with a horn-shaped cooling pipe feed opening (3.1).
5. A semicoke indirect heat exchange coke quenching method capable of automatically adjusting cold medium circulation speed is characterized in that: the coke quenching method specifically adopts the following indirect heat exchange coke quenching steps:
step 1: raw coal is conveyed into a retort furnace top bin (1) by conveying equipment such as a belt conveyor and the like;
step 2: raw material coal in the bin slowly moves downwards to enter a furnace body (16), and is heated to the temperature of 500-700 ℃ by high-temperature flame sprayed by a combustion burner (8) in a dry distillation section (2) of the dry distillation furnace and subjected to dry distillation reaction to generate high-temperature semicoke;
and step 3: the high-temperature semicoke slowly moves downwards, enters the cooling pipe (3) through the cooling pipe feed opening (3.1) and continuously and slowly moves downwards to indirectly exchange heat with the circulating cooling water in the jacket water bin (5), so that the temperature of the semicoke is reduced;
and 4, step 4: the temperature sensor (6) arranged in the cooling pipe (3) transmits semi-coke temperature data at the outlet of the cooling pipe (3) to the control unit (15) in real time, compares the semi-coke temperature data with a coke quenching temperature threshold value preset in the control unit (15), sends out a corresponding control instruction in real time, adjusts the opening degree of the circulating water adjusting valve (12), and ensures that the semi-coke temperature is kept in a coke quenching temperature range meeting the requirement by adjusting the flow rate of the circulating water around the cooling pipe (3);
and 5: the cooled semicoke falls into a coke discharging box (7) at the bottom of the furnace from the lower port of the cooling pipe (3) and is discharged from a coke discharging port (17).
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| CN202011370907.9A CN112480940A (en) | 2020-11-30 | 2020-11-30 | Semicoke indirect heat exchange coke quenching device and method capable of automatically adjusting cold medium circulation speed |
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