Full dry quenching production system
Through the design of two dry quenching furnaces, three dry quenching boilers and three-stage temperature inert gas mother pipes, the problem of insufficient load during maintenance of a dry quenching furnace in a fully dry quenching system is solved, and the stable operation and economic benefits of the system are achieved.
Patent Information
- Application Number
- CN202422177063.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-05
AI Technical Summary
Among the existing fully dry coking quenching systems, one set of dry quenching furnaces cannot meet the problems of full-load coking production during maintenance, and the three sets of dry quenching furnace systems occupy a large area and have high investment.
The production system consisting of two dry quenching furnaces, three dry quenching boilers and three-stage temperature inert gas mother pipes is used to allow any dry quenching furnace to be kept online and the stable operation of the system is ensured through the design of cutting off valves and multi-channel dust collectors.
It realizes that the fully dry coke quenching system can still be produced at full capacity during maintenance of a dry quenching furnace, saving land and investment, ensuring the stable and safe operation of the system, and having environmental protection and economic benefits.
Smart Images
Figure CN223134394U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of waste heat utilization of coke dry quenching, and particularly relates to a production system for full coke dry quenching. Background Art
[0002] Coke dry quenching is a method of quenching red-hot coke with inert gas. It originated in Switzerland and was studied and developed from the 1920s to the 1940s. After entering the 1960s, continuous and stable production was achieved, and it gradually developed towards large-scale, automated, and low-energy consumption directions. This method can recover and utilize the sensible heat of red coke, improve the quality of coke, and at the same time reduce the environmental pollution caused by quenching operations. On the one hand, coke dry quenching can use inert gas to cool high-temperature coke to a qualified temperature, and on the other hand, it can recover the sensible heat of high-temperature coke through a heat exchange system to produce power steam.
[0003] The process of wet coke quenching involves transporting high-temperature coke out of the coke oven and transporting it to the coke quenching tower by a coke quenching car. During this process, water is directly sprinkled on the high-temperature coke to cool it. The steam and corrosive media such as phenol, cyanide, and sulfide remaining in the coke generated by this method may erode the surrounding buildings and can spread and pollute an area several kilometers away. At present, when some coking projects are under coke dry quenching maintenance, wet coke quenching in the coke quenching tower is still used, which will cause large-area air pollution. Therefore, local governments have clearly required that newly built coking projects must adopt a production mode of full coke dry quenching, that is, wet coke quenching during maintenance is no longer allowed.
[0004] Generally, when designing full coke dry quenching, two sets of coke dry quenching or three sets or more of coke dry quenching are mostly used to achieve (normally, all coke dry quenching operate at low load synchronously. When one set of coke dry quenching is under maintenance, the remaining coke dry quenching operate at full load). When the required full coke dry quenching capacity is Q, when designing with two sets of coke dry quenching, considering the stable and safe production of the coke dry quenching boiler (generally, the minimum load of the coke dry quenching boiler is about 50% of the maximum load. If the load is too low, the wall temperature of the superheater of the coke dry quenching boiler is likely to exceed the temperature, and then a tube explosion phenomenon may occur), the scale of each set of coke dry quenching is mostly designed to be 0.8 - 0.9Q when designing, so as to ensure that the load of the two sets of coke dry quenching is > 50% during normal production. However, the problem is that when one set of coke dry quenching furnace is under maintenance, the other set of coke dry quenching can only meet 80% - 90% of the production load. At this time, the coking time of the coke oven needs to be extended, and the production capacity is reduced. When designing with three sets or more of coke dry quenching, the scale of each set of coke dry quenching is Q / (n - 1). When one set of coke dry quenching is under maintenance, the remaining coke dry quenching can still meet the production load requirements, but this configuration occupies a large area and has a large investment. Content of the Utility Model
[0005] The object of the present utility model is to provide a production system for fully dry quenching of coke, which overcomes the deficiencies of the prior art. The production system is composed of two coke dry quenching furnaces, three coke dry quenching boilers and a three-stage temperature inert gas main pipe, solves the problem that when one coke dry quenching furnace in the fully dry quenching system is under maintenance, the other one cannot meet the full-load production of coking, realizes fully dry quenching of coke, and has the advantages of environmental protection, land occupation and investment saving, etc.
[0006] To achieve the above object, the present utility model is realized through the following technical solutions:
[0007] A production system for fully dry quenching of coke includes two coke dry quenching furnaces, three coke dry quenching boilers, a high-temperature inert circulating gas main pipe, a medium-temperature inert circulating gas main pipe and a low-temperature inert circulating gas main pipe. The high-temperature inert circulating gas of the two coke dry quenching furnaces can enter any three coke dry quenching boilers. Among them: three coke dry quenching boilers are arranged side by side between the high-temperature inert circulating gas main pipe and the medium-temperature inert circulating gas main pipe, and a cut-off valve is arranged on each of the front and rear pipelines of the coke dry quenching boiler, and any coke dry quenching boiler can be overhauled online without stopping production; two coke dry quenching furnaces are arranged side by side between the high-temperature inert circulating gas main pipe and the low-temperature inert circulating gas main pipe, and a primary dust collector is arranged on the exhaust pipe of each coke dry quenching furnace, and a network access valve is arranged on each of the front and rear pipelines of the coke dry quenching furnace, and any coke dry quenching furnace can be overhauled online without stopping production; a secondary dust collector, a circulating fan and a feed water preheating device are arranged in sequence on the pipeline between the medium-temperature inert circulating gas main pipe and the low-temperature inert circulating gas main pipe according to the flue gas flow direction.
[0008] The diameter ratios of the high-temperature inert circulating gas main pipe, the medium-temperature inert circulating gas main pipe and the low-temperature inert circulating gas main pipe are 3:1.1:1.
[0009] The cut-off valve and the network access valve are both high-temperature resistant cut-off valves.
[0010] The feed water preheating device is a radial heat pipe type feed water preheating device with a multi-channel structure.
[0011] The primary dust collector is a gravity type or cyclone type dust collector.
[0012] The secondary dust collector is any one of a multi-tube cyclone separator, a cartridge dust collector or a pulse bag type dust collector, and it has a multi-channel structure, and cut-off valves are arranged in front of and behind each channel, which is convenient for online overhaul without stopping production.
[0013] The circulating fans are arranged in parallel in two, and cut-off valves are arranged in front of and behind the circulating fans, which is convenient for online overhaul without stopping production. The two circulating fans can operate simultaneously or one can operate while the other is in standby.
[0014] The two coke dry quenching furnaces have the same specification and production capacity, and the three coke dry quenching boilers have the same specification and production capacity.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0016] 1) It solves the industry problem that when one of the two full dry coke quenching systems of coke dry quenching furnaces is under maintenance, the other one cannot meet the full-load production of coking, and at the same time avoids the problems of large land occupation and high investment of the three full dry coke quenching systems of coke dry quenching furnaces.
[0017] 2) It ensures that each sub-item in the system, such as equipment like coke dry quenching furnaces, primary dust collectors, coke dry quenching boilers, secondary dust collectors, circulating fans, radial heat pipe type feed water preheating devices, etc., can be repaired online without stopping production, without affecting the stable and safe operation of the entire system.
[0018] 3) The present utility model is also applicable to other similar waste heat power generation systems, and has the advantages of environmental protection, land occupation saving, investment saving, low operation cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic process flow diagram of an embodiment of the present utility model.
[0020] In the figure: 1 - coke dry quenching furnace, 2 - primary dust collector, 3 - grid connection valve, 4 - high-temperature inert circulating gas main pipe, 5 - cut-off valve, 6 - coke dry quenching boiler, 7 - cut-off valve, 8 - medium-temperature inert circulating gas main pipe, 9 - secondary dust collector, 10 - cut-off valve, 11 - circulating fan, 12 - cut-off valve, 13 - radial heat pipe type feed water preheating device, 14 - low-temperature inert circulating gas main pipe, 15 - grid connection valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.
[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the specific embodiments required for use in the description of the specific embodiments or the prior art. Obviously, the specific embodiments described below are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other specific embodiments can also be obtained based on these specific embodiments.
[0023] Generally, the components of the embodiments of the present utility model described and shown in the specific embodiments here can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the specific embodiments is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model.
[0024] See Figure 1, is a schematic process flow diagram of an embodiment of a production system for fully dry quenching of coke in the present utility model, including two coke dry quenching furnaces 1, three coke dry quenching boilers 6, a high-temperature inert circulating gas main pipe 4, a medium-temperature inert circulating gas main pipe 8, and a low-temperature inert circulating gas main pipe 14. The high-temperature inert circulating gas from the two coke dry quenching furnaces 1 can enter any three coke dry quenching boilers 6. Among them: Three coke dry quenching boilers 6 are arranged side by side between the high-temperature inert circulating gas main pipe 4 and the medium-temperature inert circulating gas main pipe 8. A cut-off valve 5 and 7 are respectively arranged on the front and rear pipelines of the coke dry quenching boiler 6. Any coke dry quenching boiler 6 can be overhauled online without stopping production; Two coke dry quenching furnaces 1 are arranged side by side between the high-temperature inert circulating gas main pipe 4 and the low-temperature inert circulating gas main pipe 14. A primary dust collector 2 is respectively arranged on the exhaust pipe of each coke dry quenching furnace 1. An inlet valve 3 and an inlet valve 15 are respectively arranged on the front and rear pipelines of the coke dry quenching furnace 1. Any coke dry quenching furnace 1 can be overhauled online without stopping production; On the pipeline between the medium-temperature inert circulating gas main pipe 8 and the low-temperature inert circulating gas main pipe 14, a secondary dust collector 9, a circulating fan 11, and a radial heat pipe type feed water preheating device 13 are arranged in sequence according to the flue gas flow direction. The cut-off valves and the inlet valves are all high-temperature resistant cut-off valves.
[0025] In the embodiment, the diameter ratio of the high-temperature inert circulating gas main pipe 4, the medium-temperature inert circulating gas main pipe 8, and the low-temperature inert circulating gas main pipe 14 is a gravity type or cyclone type dust collector. The primary dust collector 2 is a gravity type or cyclone type dust collector.
[0026] The secondary dust collector 9 is any one of a multi-tube cyclone separator, a cartridge dust collector, or a pulse bag type dust collector, and it has a multi-channel structure. Valves are arranged before and after each channel, which is convenient for online overhaul without stopping production.
[0027] Two circulating fans 11 are arranged side by side. Cut-off valves 10 and 12 are arranged before and after the circulating fan 11, which is convenient for online overhaul without stopping production. The two circulating fans 11 can operate simultaneously or one can operate while the other is in standby.
[0028] In order to achieve the stable production of the system, it is advisable that the specifications and production capacities of the two coke dry quenching furnaces 1 are the same, and it is advisable that the specifications and production capacities of the three coke dry quenching boilers 6 are the same.
[0029] The production system of the fully dry coke quenching of the utility model adopts a large main pipe system between two coke dry quenching furnaces 1 and three coke dry quenching boilers 6. The high-temperature inert circulating gas can enter any one of the coke dry quenching boilers 6 to meet the safe working temperature of the coke dry quenching boiler 6. The low-temperature inert circulating gas can enter any one of the coke dry quenching furnaces 1 to complete the dry quenching operation. The medium-temperature inert circulating gas is supplemented into the low-temperature inert circulating gas main pipe 14 after secondary dust removal and heat exchange to maintain the gas balance in the production system. Among them, the temperature of the high-temperature inert circulating gas is 800 - 1000 °C; the temperature of the medium-temperature inert circulating gas is 160 - 180 °C; the temperature of the low-temperature inert circulating gas is -130 °C.
[0030] The high-temperature inert gas (800 - 1000 °C) of the two coke dry quenching furnaces 1 respectively passes through their respective primary dust collectors 2. After removing large-particle coke powder, it enters the high-temperature inert circulating gas main pipe 4 through the access valves 3, and then is distributed to the three coke dry quenching boilers 6. Cut-off valves 5 and 7 are arranged before and after the coke dry quenching boiler 6 to facilitate on-line maintenance without stopping production. After the high-temperature inert circulating gas is cooled to 160 - 180 °C, it enters the secondary dust collector 9 through the 160 - 180 °C low-temperature inert circulating gas main pipe 8. The secondary dust collector 9 adopts a multi-channel structure, and cut-off valves are arranged before and after each channel to facilitate on-line maintenance without stopping production. After being dusted again by the secondary dust collector 9, it enters the two circulating fans 11. The circulating fans 11 provide the operating power for the entire circulating gas system. Cut-off valves 10 and 12 are arranged before and after the circulating fans 11 to facilitate on-line maintenance without stopping production. Then it enters a radial heat pipe type feed water preheating device 13. The radial heat pipe type feed water preheating device 13 adopts a multi-channel structure, and cut-off valves are arranged before and after each channel to facilitate on-line maintenance without stopping production. Then the temperature of the circulating gas drops to -130 °C and is distributed into the two coke dry quenching furnaces 1 through the -130 °C low-temperature inert circulating gas main pipe 14. Access valves 15 are respectively arranged between the low-temperature inert circulating gas main pipe 14 and the two coke dry quenching furnaces 1. This system realizes the fully dry coke quenching production through the main pipe system + cut-off valve system of two coke dry quenching furnaces, two primary dust collectors, corresponding three coke dry quenching boilers, one secondary dust collector, two circulating fans, and one radial heat pipe type feed water preheating device.
[0031] In the scheme, the required coke quenching capacity is Q. In the utility model, the capacity of each coke dry quenching furnace is Q, the capacity of each primary dust collector is Q, the capacity of each coke dry quenching boiler is Q / 2, the capacity of the secondary dust collector is Q, and one of the channels is reserved. The capacity of each circulating fan is Q, and the capacity of the radial heat pipe type feed water preheating device is Q, and one of the channels is reserved. Under the condition of ensuring the normal operation of the system, the standby rate of each sub-item is the lowest, and it has the advantages of saving investment and low operation cost.
[0032] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A production system for fully dry quenching of coke, characterized in that, It includes two coke dry quenching furnaces, three coke dry quenching boilers, a high-temperature inert circulating gas main pipe, a medium-temperature inert circulating gas main pipe, and a low-temperature inert circulating gas main pipe. The high-temperature inert circulating gas from the two coke dry quenching furnaces can enter any three of the coke dry quenching boilers. Among them: Three coke dry quenching boilers are arranged in parallel between the high-temperature inert circulating gas main pipe and the medium-temperature inert circulating gas main pipe. A cut-off valve is provided on each of the front and rear pipelines of the coke dry quenching boiler, and any one of the coke dry quenching boilers can be overhauled online without stopping production; Two coke dry quenching furnaces are arranged in parallel between the high-temperature inert circulating gas main pipe and the low-temperature inert circulating gas main pipe. A primary dust collector is provided on the exhaust pipe of each coke dry quenching furnace, and an inlet valve is provided on each of the front and rear pipelines of the coke dry quenching furnace. Any one of the coke dry quenching furnaces can be overhauled online without stopping production; A secondary dust collector, a circulating fan, and a feed water preheating device are sequentially arranged on the pipeline between the medium-temperature inert circulating gas main pipe and the low-temperature inert circulating gas main pipe according to the flue gas flow direction.
2. The production system for fully dry quenching coke according to claim 1, characterized in that, The diameter ratios of the high-temperature inert circulating gas main pipe, the medium-temperature inert circulating gas main pipe, and the low-temperature inert circulating gas main pipe are 3:1.1:
1.
3. The production system for fully dry quenching coke according to claim 1, wherein Both the cut-off valve and the inlet valve are high-temperature resistant cut-off valves.
4. A production system for fully dry quenching of coke according to claim 1, characterized in that, The feed water preheating device is a radial heat pipe type feed water preheating device with a multi-channel structure.
5. The production system for fully dry quenching coke according to claim 1, characterized in that, The primary dust collector is a gravity type or cyclone type dust collector.
6. A production system for fully dry quenching coke, characterized in that, The secondary dust collector is any one of a multi-tube cyclone separator, a cartridge dust collector, or a pulse bag filter. It has a multi-channel structure, and cut-off valves are provided before and after each channel, which is convenient for online overhaul without stopping production.
7. The production system for fully dry quenching coke according to claim 1, characterized in that, The two circulating fans are arranged in parallel. Cut-off valves are provided before and after the circulating fans, which is convenient for online overhaul without stopping production. The two circulating fans can operate simultaneously or one can operate while the other is in standby.
8. A production system for fully dry quenching of coke, characterized in that, The two coke dry quenching furnaces have the same specification and production capacity, and the three coke dry quenching boilers have the same specification and production capacity.