CN211339384U - Semi-dry coke quenching waste heat and coal gas recovery and process system - Google Patents
Semi-dry coke quenching waste heat and coal gas recovery and process system Download PDFInfo
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- CN211339384U CN211339384U CN201922324151.3U CN201922324151U CN211339384U CN 211339384 U CN211339384 U CN 211339384U CN 201922324151 U CN201922324151 U CN 201922324151U CN 211339384 U CN211339384 U CN 211339384U
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Abstract
The utility model relates to a semi-dry coke quenching waste heat and coal gas recovery and process systems, including coke conveying system, coke quenching system, waste heat recovery system and the coal gas recovery system that connects in order, wherein: the coke conveying system is used for conveying the generated high-temperature coke to the coke quenching system; the coke quenching system is respectively connected with the coke conveying system and the waste heat recovery system and is used for quenching the high-temperature coke; the waste heat recovery system is connected with the coke quenching system and is used for recovering the heat of the high-temperature coke; the coal gas recovery system is connected with the coke quenching system and is used for recovering coal gas generated in the coke quenching process. Through using the device provided by the utility model, the purpose of semidry coke quenching has been realized, the recycle of coke quenching, fine coke, waste heat and coal gas has been realized to but wide application is in coking technical field.
Description
Technical Field
The utility model relates to the technical field of coking, in particular to a semi-dry coke quenching waste heat and coal gas recovery and process system.
Background
At present, two coke quenching modes of a coking industry include wet coke quenching and dry coke quenching. The wet quenching is a mode of cooling the red coke by using coking wastewater to cool the red coke, a large amount of steam is generated when the red coke is in contact with water, a large amount of dust and harmful substances are mixed in the steam, a large amount of heat energy of the latent heat of the red coke is wasted in the process of cooling, the environment is polluted, and cracks of the red coke in contact with water are increased to influence the product quality.
The dry quenching technology is a method for cooling red coke by inert gas, wherein the inert gas is blown into a red coke layer of a cooling chamber of a dry quenching furnace by a circulating fan, heat is exchanged by a waste heat boiler after absorbing the heat of the red coke, steam is generated after absorbing waste heat to drive a turbonator to generate electricity, and the coke cooled by the inert gas is discharged from the bottom of the dry quenching furnace. Although the dry quenching technology utilizes the waste heat of the red coke, in order to ensure the safe operation of the dry quenching, the coal gas generated during quenching is burnt into carbon dioxide by the sucked air and enters a gas circulation system. The dry quenching technology can not fully recycle the coal gas, but also has the disadvantages of large equipment investment, large occupied area, high operation cost and maintenance cost, high coke burning loss rate and serious influence on the economic benefit of enterprises.
In patent No. 2019220250289 (in a wet pressure coke quenching waste heat and coal gas recovery system), a method for respectively quenching coke by a plurality of coke quenching tanks is adopted, although the defects of dry quenching and wet quenching are overcome, the method is realized by switching two coke quenching tanks in the waste heat recovery process, the steam pressure fluctuation is large, the pressure is unstable, the sealing is difficult to reliably operate, in addition, the coke loading process is complicated, and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a semi-dry coke quenching waste heat and coal gas recovery and process system.
The utility model provides a technical scheme does:
a semi-dry coke quenching waste heat and coal gas recovery and process system comprises a coke conveying system, a coke quenching system, a waste heat recovery system and a coal gas recovery system which are connected in sequence, wherein:
the coke conveying system is used for conveying the generated high-temperature coke to the quenching system;
the coke quenching system is respectively connected with the coke conveying system and the waste heat recovery system and is used for quenching the high-temperature coke;
the waste heat recovery system is connected with the coke quenching system and is used for recovering the heat of the high-temperature coke;
the coal gas recovery system is connected with the coke quenching system and is used for recovering coal gas generated in the coke quenching process.
Further, the coke conveying system comprises a coke guide, a coke conveying vehicle, a rail for enabling the coke conveying vehicle to travel, and a hoist for hoisting the high-temperature coke to the upper part of the quenching system.
Furthermore, a coke tank is arranged in the coke transporting vehicle and is used for containing high-temperature coke.
Further, the quenching system comprises a quenching furnace, a heat exchange component positioned in the quenching furnace, and a high-temperature inlet and outlet pipeline and a low-temperature inlet and outlet pipeline which are connected to the quenching furnace, wherein:
high-temperature coke lifted by a lifter enters a charging hopper, then flows into a coke quenching furnace and contacts with a heat exchange component; the high-temperature inlet and outlet pipeline and the low-temperature inlet and outlet pipeline are used for conveying heat energy generated after heat exchange to the waste heat recovery system.
Further, the heat exchange component comprises a high-temperature heat exchange array pipe and a low-temperature heat exchange array pipe, a plurality of spray heads are arranged between the high-temperature heat exchange array pipe and the low-temperature heat exchange array pipe, a coke quenching water pump is arranged outside the coke quenching furnace, and the coke quenching water pump is connected with the spray heads through a coke quenching water pipe;
inside and being located heat transfer part upper portion of quenching stove is equipped with one-level sieve and second grade sieve in proper order, just the longitudinal section of one-level sieve and second grade sieve is the type of falling V all be equipped with the sieve mesh on one-level sieve and the second grade sieve.
Further, the waste heat recovery system comprises a waste heat boiler, a steam drum positioned on the waste heat boiler, a heat exchanger positioned in the waste heat boiler, a deaerator, a water pump and a circulating fan, wherein:
the waste heat boiler is connected with the coke quenching furnace through high-temperature and low-temperature inlet and outlet pipelines, and exchanges heat with the heat exchanger through a circulating fan by using air as circulating gas; the water pump is connected with the deaerator, and the deaerator is connected with the waste heat boiler through the primary heat exchanger and conveys deaerated water to the waste heat boiler. The inlet and the outlet of the circulating fan are respectively connected with the waste heat boiler and the coke quenching furnace, and the inlet of the circulating fan is provided with an air regulating valve for controlling the flow of sucked circulating air.
Further, the coal gas recovery system includes mechanical dust remover, coal gas filter and the coal gas storage tank that connects in order, wherein:
the mechanical dust remover is used for mechanically removing dust from the mixed gas discharged from the coke quenching furnace;
the coal gas filter is used for filtering coal gas coming out of the mechanical dust collector, and a filter device is arranged in the coal gas filter;
the gas storage tank is used for storing clean gas from the gas filter;
and a primary heat exchanger is also arranged between the gas filter and the gas storage tank, and a primary heat exchanger tube is arranged in the primary heat exchanger.
Furthermore, the heat exchanger is a boiler tube array, an inlet of the tube array is connected with a softened water pipe, the softened water pipe is connected with a primary heat exchanger, and the primary heat exchanger is connected with a deaerator;
the coal gas filter comprises a primary filter and a secondary filter which are connected with each other, wherein the outlet end of the secondary filter is connected with a coal gas fan, and the outlet of the coal gas fan is connected with a coal gas storage tank.
Further, an air regulating valve is arranged between the circulating fan and the waste heat boiler.
Furthermore, a switching valve is arranged between the coal gas fan and the coal gas storage tank.
After the structure more than adopting, the utility model has the advantages of as follows:
1) the burning loss of coke is reduced by quenching coke by a semi-dry method, and the recycling of coke powder is realized; 2) the air is used as heat exchange circulating gas, so that the heat transfer coefficient is high, and the operation cost is low; 3) the semi-dry quenching has the advantages of wet quenching and dry quenching, and has more stable moisture content and higher quality; 4) quenching time is shortened by a semi-dry method, coke quality is guaranteed, and production efficiency is improved; 5) the equipment is simple and mature, the occupied area is small, the investment is low, and the construction period is short; 6) realizes the recycling of coke quenching, coke powder, waste heat and coal gas, thereby forming a new process route of coke quenching production circulation with energy conservation, emission reduction and comprehensive utilization.
Drawings
FIG. 1 is a process flow diagram of a semi-dry quenching waste heat and gas recovery system.
Wherein:
1, a coke guide; 2, track; 3, a coke transporting vehicle; 4, a hoisting machine; 5, a charging hopper; 6, sealing the furnace cover; 7 a moving mechanism; 8, an expansion joint; 9 detecting the instrument; 10 a mechanical dust remover; 11, a baffle plate; 12 a primary heat exchanger; 13 primary heat exchanger tubes; 14 gas filter; 15 a filter device; 16 flow meters; 17 quenching the coke oven; 18 first-stage sieve plates; 19 a second-stage sieve plate; 20 high-temperature heat exchange tubes; 21 high-temperature gas inlet; 22 a high-temperature gas outlet; 23 expansion joints; 24, a first high-temperature pipeline; 25, a waste heat boiler; 26 steam drums; 27 high temperature piping; 28 a spray header; 29 a low temperature gas outlet; 30 low-temperature heat exchange tubes; 31 quenching water pump; 32 an inlet of a waste heat boiler; 33 circulating fan shroud; 34 sealing the discharger; 35 a belt; 36 low temperature flue gas inlet; 37 circulating fan; 38 an air adjustment valve; 39 waste heat boiler tubes; 40 softening the water pipeline; 41 a deaerator; 42 circulating water pump; 43 a gas fan; 44 switching valves; 45 gas storage tank.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A semi-dry coke quenching waste heat and coal gas recovery and process system comprises a coke conveying system, a coke quenching system, a waste heat recovery system and a coal gas recovery system which are connected in sequence, wherein:
the coke conveying system is used for conveying the generated high-temperature coke to the coke quenching system;
the coke quenching system is respectively connected with the coke conveying system and the waste heat recovery system and is used for quenching the high-temperature coke;
the waste heat recovery system is connected with the coke quenching system and is used for recovering the heat of the high-temperature coke;
the coal gas recovery system is connected with the coke quenching system and is used for recovering coal gas generated in the coke quenching process.
The structure and the working process of the four systems are as follows:
the coke conveying system comprises a coke guide 1, a rail 2 for enabling a coke conveying vehicle 3 to travel, a lifter 4 for lifting high-temperature coke to the upper part of the coke quenching system, a charging hopper 5, a sealing furnace cover 6 and a moving mechanism 7. The coke conveying car 3 is provided with a coke tank, the coke guide car 1 intercepts coke in the coke tank, the coke conveying car 3 conveys the coke to a coke quenching workshop, the coke tank is lifted to the upper part of a coke quenching system by the lifter 4, the charging hopper 5 is opened by the moving mechanism 7, red coke is scattered in the coke quenching system, the sealing furnace cover 5 is closed, and the coke charging process is completed.
In this process, the moving mechanism is in particular fixedly connected to a sealed furnace cover 6, the sealed furnace cover 6 serving for sealing a quenching device of the quenching system. The moving mechanism 7 is a hydraulic or pneumatic operating mechanism, and the charging hopper 5 has a function of containing high-temperature coke.
In order to realize the circular coke loading, a coke guide, a coke conveying vehicle and 2 coke tanks are respectively arranged.
The quenching system comprises a quenching furnace 17, a heat exchange component positioned in the quenching furnace 17, and a high-temperature inlet and outlet pipeline and a low-temperature inlet and outlet pipeline which are connected to the quenching furnace 17, wherein:
the high-temperature coke lifted by the lifter 4 enters the charging hopper 5 and then flows into the coke quenching furnace 17 and contacts with the heat exchange component; the high-temperature inlet and outlet pipeline and the low-temperature inlet and outlet pipeline are used for conveying heat energy generated after heat exchange to the waste heat recovery system.
The heat exchange component comprises a high-temperature heat exchange array pipe 20 and a low-temperature heat exchange array pipe 30, a plurality of spray headers 28 are arranged between the high-temperature heat exchange array pipe 20 and the low-temperature heat exchange array pipe 30, a coke quenching water pump 31 is arranged outside the coke quenching furnace 17, and the coke quenching water pump 31 is connected with the spray headers 28 through a coke quenching water pipe;
inside just being located heat transfer part upper portion at quenching stove 17, be equipped with one-level sieve 18 and second grade sieve 19 in proper order, and the longitudinal section of one-level sieve 18 and second grade sieve 19 is the type of falling V, all is equipped with the sieve mesh on one-level sieve 18 and second grade sieve 19.
A high-temperature gas inlet 21, a high-temperature gas outlet 22, a high-temperature pipeline 27 and a low-temperature gas outlet 29 are respectively arranged on the quenching furnace 17, wherein: high-temperature gas import 21, high-temperature gas export 22 are connected respectively at the inlet outlet end of high temperature heat transfer tubulation 20, and connect through high temperature pipeline 27 between low temperature gas import 29, the high-temperature gas import 21, are connected with expansion joint 23 and high temperature pipeline 24 at high temperature gas export 22, and waste heat recovery system is connected to high temperature pipeline 24, thereby through the heat of air cycle recycle high temperature heat transfer tubulation 20 and the low temperature heat transfer tubulation 30 absorption coke. A sealed discharger 34 and a discharge belt 35 are provided at the lower portion of the quenching furnace 17 so that the coke having a reduced temperature is conveyed to a designated position by the belt.
In the quenching process, red coke uniformly scatters in a quenching furnace 17 after passing through a first-stage sieve plate 18 and a second-stage sieve plate 19, a high-temperature heat exchange tube array 20 and a low-temperature heat exchange tube array 30 are buried by the red coke, latent heat of the red coke is transferred to circulating air in the high-temperature heat exchange tube array 20, the circulating air is subjected to heat exchange through a waste heat recovery system, when the coke is cooled to a proper temperature, a spray head 28 sprays water, the coke is further cooled, and finally the coke is finally cooled to about 150 ℃ through the low-temperature heat exchange tube array 30 and scattered on a discharge belt 35 through a sealed discharger 34 to complete the quenching process.
The waste heat recovery system comprises a waste heat boiler 25, a steam drum 26 positioned on the waste heat boiler 25, a heat exchanger positioned in the waste heat boiler 25, a deaerator 41, a water pump 42 and a circulating fan 37, wherein:
the waste heat boiler 25 is connected with the coke quenching furnace 17 through a high-temperature inlet and outlet pipeline and utilizes air sucked by an air regulating valve 38 at the inlet of a circulating fan 37 to absorb heat of red coke through a high-temperature heat exchange tube array 20 and a low-temperature heat exchange tube array 30 to exchange heat with a heat exchanger; the water pump 42 is connected with the deaerator 41, the deaerator 41 is connected with the primary heat exchanger 12, the primary heat exchanger 12 is connected with the waste heat boiler 25 and conveys deaerated water to the waste heat boiler 25, and the inlet and the outlet of the circulating fan 37 are respectively connected with the coke quenching furnace 17 and the waste heat boiler 25.
Latent heat of the red coke is conducted to the circulating air in the high-temperature heat exchange array tube 20 and the low-temperature heat exchange array tube 30, the heat of the red coke is carried away by the circulating air, and the circulating air exchanges heat with the waste heat boiler 25 under the action of the circulating fan 37, so that softened water in the waste heat boiler 25 is heated, and steam is generated and finally used by a user.
The coal gas recovery system comprises a mechanical dust collector 20, a coal gas filter 14 and a coal gas storage tank 45, when the primarily cooled red coke flows into the middle part of the coke quenching furnace 17, the spray header 28 sprays water to generate steam, the high-temperature coke reacts with water to generate coal gas and hydrogen mixed gas which enters the mechanical dust collector 20, coke powder particles and large water drops sink to the lower part of the mechanical dust collector 20 under the action of gravity, the mixed gas enters the primary cooler 12, a primary heat exchanger tube array 13 is arranged in the primary heat exchanger 12, and most of the steam is cooled and then becomes water to sink. The cooled gas enters a gas filter 14, a filter device 15 is arranged in the gas filter 14, and the gas is sent into a gas storage tank 45 after being filtered and qualified through inspection.
The heat exchanger is a waste heat boiler tube array 39, the inlet of the tube array 39 is connected with a softened water pipe 40, the softened water pipe 40 is connected with the primary heat exchanger 12, and the primary heat exchanger 12 is connected with a deaerator 41;
the gas filter 14 comprises a primary filter and a secondary filter which are connected with each other, wherein the outlet end of the secondary filter is connected with a gas fan 43, and the outlet of the gas fan 43 is connected with a gas storage tank 45.
An air regulating valve 38 is arranged between the circulating fan 37 and the waste heat boiler 25.
A switching valve 44 is arranged between the gas fan 43 and the gas storage tank 45.
The device realizes primary dry quenching through a high-temperature heat exchange tube array 20, a low-temperature heat exchange tube array 30, a waste heat boiler 25 and a circulating fan 37 in a quenching furnace 17; when the red coke reaches the proper temperature after being primarily cooled, wet quenching is realized through the spray header 28 and the water pump 42. The semi-dry quenching method composed of the dry method and the wet method accelerates the quenching speed, avoids coke burning loss, recovers waste heat and coal gas and increases the yield of coke powder.
An expansion joint I8 is arranged between the coke quenching furnace 17 and the mechanical dust remover 10, and a detection instrument 9 is arranged for monitoring whether the coal gas is qualified. The mechanical dust remover 10 is also internally provided with a baffle plate 11 for changing the dust flow velocity through the action of the baffle plate 11 and improving the dust removing effect when the coal gas passes through the mechanical dust remover 10, wherein the baffle plate 11 is of a bent plate-shaped structure.
In order to monitor the flow of gas as it is filtered by the gas filter 14, a flow meter 16 is provided.
One end of the high-temperature pipeline 24 is connected with the high-temperature gas outlet 22, the other end of the high-temperature pipeline is connected with the inlet 32 of the waste heat boiler 25, and a first expansion joint is arranged on a pipeline section close to the waste heat boiler 25.
In order to reduce the noise of the circulation fan 37, a circulation fan shroud 33 is provided outside thereof.
Two ends of the circulating fan 37 are respectively connected with the waste heat boiler 25 and the coke quenching furnace 17 through pipelines, and the pipelines are connected with the low-temperature flue gas inlet 36 on the coke quenching furnace 17, so that the purpose of conveying circulating medium air is achieved.
Having thus described the fundamental principles and principal features of the novel use, it will be appreciated by those skilled in the art that the novel use is not limited by the embodiments described above, which are given by way of illustration only, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a semi-dry method quenching waste heat and coal gas recovery and process systems which characterized in that, including coke conveying system, quenching system, waste heat recovery system and the coal gas recovery system that connects in order, wherein:
the coke conveying system is used for conveying the produced high-temperature coke to the coke quenching system;
the coke quenching system is respectively connected with the coke conveying system and the waste heat recovery system and is used for quenching the high-temperature coke;
the waste heat recovery system is connected with the coke quenching system and is used for recovering the heat of the high-temperature coke;
the coal gas recovery system is connected with the coke quenching system and is used for recovering coal gas generated in the coke quenching process.
2. The semi-dry quenching waste heat and gas recovery and processing system as claimed in claim 1, wherein the coke conveying system comprises a coke guide, a coke car and a rail for the coke car to travel, and a hoist for lifting the high temperature coke to the upper part of the quenching system.
3. The semi-dry quenching waste heat and gas recovery and processing system as claimed in claim 2, wherein the coke car is provided with a coke pot for holding high temperature coke, and the cross section of the coke pot is trapezoidal.
4. The semi-dry quenching waste heat and gas recovery and processing system of claim 1, wherein the quenching system comprises a quenching furnace, a heat exchange component located in the quenching furnace, and a high temperature inlet and outlet pipeline and a low temperature inlet and outlet pipeline connected to the quenching furnace, wherein:
high-temperature coke from the hoister enters the charging hopper, then flows into the coke quenching furnace, and contacts with the heat exchange tubes for heat exchange; the high-temperature inlet and outlet pipeline and the low-temperature inlet and outlet pipeline are used for conveying heat energy generated after heat exchange to the waste heat recovery system.
5. The semi-dry quenching waste heat and gas recovery and processing system as claimed in claim 4, wherein the heat exchange components inside the quenching furnace are composed of high temperature heat exchange tubes and low temperature heat exchange tubes, and the structural shape is square or round.
6. The semi-dry quenching waste heat and gas recovery and processing system as claimed in claim 5, wherein a first sieve plate and a second sieve plate are sequentially arranged in the quenching furnace and above the heat exchange part, the longitudinal sections of the first sieve plate and the second sieve plate are inverted V-shaped, and sieve holes are arranged on the first sieve plate and the second sieve plate.
7. The semi-dry quenching waste heat and gas recovery and processing system as claimed in claim 1, wherein the waste heat recovery system comprises a waste heat boiler, a steam drum positioned on the waste heat boiler, a heat exchanger positioned in the waste heat boiler, a deaerator, a water pump and a circulating fan, wherein:
the waste heat boiler is connected with the coke quenching furnace through a high-low temperature inlet and outlet pipeline and exchanges heat with high-temperature coke through a heat exchanger by utilizing air circulation; the water pump is connected with the deaerator, the deaerator is connected with the boiler and conveys deaerated water to the waste heat boiler, and an inlet and an outlet of the circulating fan are respectively connected with the waste heat boiler and the coke quenching furnace.
8. The semi-dry quenching waste heat and gas recovery and processing system of claim 1, wherein the gas recovery system comprises a mechanical dust collector, a gas filter and a gas storage tank which are connected in sequence, wherein:
the mechanical dust remover is used for mechanically removing dust from the mixed gas discharged from the coke quenching furnace;
the coal gas filter is used for filtering coal gas discharged from the mechanical dust collector, and a filtering device is arranged in the coal gas filter; the coal gas filter comprises a primary filter and a secondary filter which are connected with each other, wherein the outlet end of the secondary filter is connected with a coal gas fan, and the outlet of the coal gas fan is connected with a coal gas storage tank;
the gas storage tank is used for storing clean gas from the gas filter;
and a primary heat exchanger is also arranged between the mechanical dust remover and the coal gas filter, and a primary heat exchanger tube is arranged in the primary heat exchanger.
9. The semi-dry quenching waste heat and gas recovery and processing system as claimed in claim 7, wherein the heat exchanger is a waste heat boiler tube array, an inlet of the tube array is connected with a softened water pipe, the softened water pipe is connected with a primary heat exchanger, and the primary heat exchanger is connected with a deaerator.
10. The semi-dry quenching waste heat and gas recovery and processing system as claimed in claim 7, wherein an air regulating valve is arranged between the circulating fan and the waste heat boiler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922324151.3U CN211339384U (en) | 2019-12-23 | 2019-12-23 | Semi-dry coke quenching waste heat and coal gas recovery and process system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922324151.3U CN211339384U (en) | 2019-12-23 | 2019-12-23 | Semi-dry coke quenching waste heat and coal gas recovery and process system |
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| CN211339384U true CN211339384U (en) | 2020-08-25 |
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| CN201922324151.3U Active CN211339384U (en) | 2019-12-23 | 2019-12-23 | Semi-dry coke quenching waste heat and coal gas recovery and process system |
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