Coke oven blowing-out system
By designing a coke oven shutdown system, heat exchange, filtration, combustion, and purification units are used to treat the purging gas, solving the problem of harmful substance emissions during coke oven shutdown and achieving an environmentally friendly coke oven shutdown process.
Patent Information
- Application Number
- CN202520314813.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-03-20
- Estimated Expiration
- 2035-02-26
AI Technical Summary
When existing coke ovens are shut down, harmful substances such as volatile organic compounds, particulate matter, nitrogen oxides, and sulfur oxides from the gas pipelines are released into the environment, causing pollution.
Design a coke oven shutdown system, including a gas collecting pipe, a purging pipe, a venting pipe, a heat exchange unit, a filtration unit, a combustion unit, a purification unit, and an emission unit. The system uses inert gas to purge and treat the gas through heat exchange, filtration, combustion, purification, and adsorption, ultimately achieving harmless emission.
This effectively prevents harmful substances from entering the environment and achieves an environmentally friendly coke oven shutdown process.
Smart Images
Figure CN224015572U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to coke oven technical field, concretely relates to a coke oven shutdown system. BACKGROUND
[0002] Coking is the process that insulates the coking coal after mixing to produce coke, coke oven gas and chemical products by dry distillation, and the main equipment for coking is coke oven, which uses blast furnace gas or coke oven gas combustion to provide heat for coal dry distillation.
[0003] In the prior art, when the coke oven needs to be shut down or production needs to be transformed, the raw gas pipeline of the coke oven needs to be safely disconnected with the gas conveying pipeline, then the residual gas in the pipeline is burned, and the gas pipeline is purged with inert gas and discharged, which causes harmful substances such as volatile organic compounds, particulate matter, nitrogen oxides and sulfur oxides in the pipeline to be discharged into the environment, causing pollution. UTILITY MODEL CONTENT
[0004] The utility model aims at developing a coke oven shutdown system which can treat the gas purged from the coke oven and discharge it after treatment when the coke oven is shut down, so as to avoid environmental pollution.
[0005] The utility model is implemented by the following technical solutions:
[0006] A coke oven shutdown system comprises:
[0007] A plurality of carbonization chambers;
[0008] A gas collecting pipe in communication with the plurality of carbonization chambers;
[0009] A purging pipe and a diffusion pipe in communication with the gas collecting pipe;
[0010] A gas source pipe in communication with the purging pipe;
[0011] The diffusion pipe is connected with an exhaust pipe, and the exhaust pipe is sequentially provided with a heat exchange unit, a filtering unit, a combustion unit, a purification unit and a discharge unit.
[0012] Optionally, the heat exchange unit comprises a heat exchange tank, a plurality of heat exchange pipes are arranged in the heat exchange tank, the heat exchange pipes are covered with heat exchange fins, both ends of the heat exchange pipes extend out of the top of the heat exchange tank, a liquid inlet pipe and a liquid outlet pipe in communication with both ends of the heat exchange pipes are arranged above the heat exchange tank, a plurality of liquid discharge pipes are arranged at the bottom of the heat exchange tank, and valves are arranged on the liquid discharge pipes.
[0013] Optionally, a plurality of upper and lower partition plates are arranged in the heat exchange tank, the upper partition plate is connected to the top of the heat exchange tank, and the lower partition plate is connected to the bottom of the heat exchange tank.
[0014] Optionally, the plurality of upper partitions and lower partitions are arranged vertically and parallel to each other, and the plurality of upper partitions and lower partitions are arranged at intervals, and a serpentine flow channel is formed between the plurality of upper partitions and lower partitions.
[0015] Optionally, the heat exchange pipes are arranged in the flow channel between adjacent upper partitions and lower partitions, and the heat exchange pipes are arranged in a serpentine manner in the flow channel between the upper partitions and lower partitions.
[0016] Optionally, the filtering unit comprises a cyclone separator and a cloth bag dust collector connected in sequence.
[0017] Optionally, the combustion unit is a regenerative thermal incinerator.
[0018] Optionally, the purification unit comprises a primary washing tower and a secondary washing tower connected in sequence, an alkaline absorbent is used in the primary washing tower, the alkaline absorbent can be sodium hydroxide or calcium hydroxide, and sodium hypochlorite or urea solution is used as a washing liquid in the secondary washing tower.
[0019] Optionally, the exhaust unit comprises an adsorption mechanism and a monitoring mechanism connected in sequence, the adsorption mechanism comprises an air inlet pipe and an air outlet pipe, the air inlet pipe is connected with the purification unit, the air outlet pipe is connected with the monitoring mechanism, two groups of adsorption assemblies are connected between the air inlet pipe and the air outlet pipe, the adsorption assemblies comprise a first adsorption tank and a second adsorption tank connected in sequence, the first adsorption tank is filled with activated carbon, the second adsorption tank is filled with molecular sieve, and valves are arranged at the inlet and outlet of the adsorption assemblies.
[0020] Optionally, the monitoring mechanism comprises a monitoring cavity connected with the air outlet pipe, the monitoring cavity is connected with an exhaust pipe and a return pipe, the return pipe is connected with the purification unit, electromagnetic valves are arranged on the exhaust pipe and the return pipe, and a gas online monitoring device is arranged in the monitoring cavity.
[0021] The beneficial effects of the present application are as follows:
[0022] The present application can treat the gas blown out during the shutdown of the coke oven, so that harmful substances such as coal gas, particulate matter, volatile organic compounds, nitrogen oxides and sulfur oxides in the gas can not enter the environment, and the purpose of environmental protection shutdown is achieved. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0024] Figure 1 is a partial structure diagram of a coke oven;
[0025] Figure 2 is a structure diagram of a shutdown system;
[0026] Figure 3 is a structure diagram of a heat exchange unit;
[0027] Figure 4 is a structure diagram of a discharge unit.
[0028] Fig. 1 is a gas collecting pipe; Fig. 2 is a carbonization chamber; Fig. 3 is a purge pipe; Fig. 4 is a gas conveying pipe; Fig. 5 is a diffusion pipe; Fig. 100 is a heat exchange unit; Fig. 101 is a heat exchange tank; Fig. 102 is a heat exchange pipe; Fig. 103 is an upper partition plate; Fig. 104 is a lower partition plate; Fig. 105 is a liquid discharge pipe; Fig. 106 is a liquid inlet pipe; Fig. 107 is a liquid outlet pipe; Fig. 200 is a filtration unit; Fig. 300 is a combustion unit; Fig. 400 is a purification unit; Fig. 500 is a discharge unit; Fig. 501 is a first adsorption tank; Fig. 502 is a second adsorption tank; Fig. 503 is a gas inlet pipe; Fig. 504 is a gas outlet pipe; Fig. 505 is a monitoring cavity; Fig. 506 is a backflow pipe; Fig. 507 is an external discharge pipe. DETAILED DESCRIPTION
[0029] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.
[0030] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present invention.
[0031] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0032] The embodiments of the present utility model will be described in detail below with reference to the drawings.
[0033] As Figures 1-4 shown, the utility model discloses a coke oven shutdown system, including with multiple carbonization chamber 2 communication's header 1, the header 1 is communicated with the gas pipe 4, and the gas produced by carbonization chamber 2 passes through header 1 and enters the gas pipe 4, and the gas pipe 4 sends the gas to the purification system and exports after purification, still be equipped with the sweep pipe 3 and the diffusion pipe 5 on the header 1, and the sweep pipe 3 and the diffusion pipe 5 are all equipped with the valve. When shutting down, the gas pipe 4 is blocked, and inert gas is blown into through the sweep pipe 3, and residual gas, volatile organic compounds, tar steam, particulate matter and the like in the header 1 are blown out by the diffusion pipe 5.
[0034] The sweep pipe 3 is communicated with the gas source pipe, and the gas source pipe is communicated with the inert gas source. The diffusion pipe 5 is communicated with the exhaust pipe, and the exhaust pipe is sequentially provided with a heat exchange unit 100, a filter unit 200, a combustion unit 300, a purification unit 400 and a discharge unit 500. The heat exchange unit 100 cools the gas input into the exhaust pipe, so that the tar steam in the gas is condensed into liquid and separated. The filter unit 200 filters impurities in the gas. The combustion unit 300 ignites the combustible gas in the gas. The purification unit 400 removes sulfur, nitrogen and volatile organic compounds from the gas after combustion. The discharge unit 500 discharges the residual inert gas.
[0035] The heat exchange unit 100 comprises a heat exchange tank 101, a plurality of upper partitions 103 and lower partitions 104 are arranged vertically and parallel to each other in the heat exchange tank 101, the upper partitions 103 are connected to the top of the heat exchange tank 101, the lower partitions 104 are connected to the bottom of the heat exchange tank 101, the plurality of upper partitions 103 and the plurality of lower partitions 104 are arranged at intervals, a serpentine flow channel is formed between the plurality of upper partitions 103 and the plurality of lower partitions 104, and the serpentine flow channel is provided with two pipelines on both sides, one of the pipelines is communicated with the exhaust pipe, and the other pipeline is communicated with the filter unit 200. A plurality of liquid discharge pipes 105 are arranged at the bottom of the heat exchange tank 101, and valves are arranged on the liquid discharge pipes 105. The liquid discharge pipes 105 are used for discharging condensate in the gas.
[0036] The heat exchange pipe 102 is arranged in a serpentine shape in the flow channel between the upper partition plate 103 and the lower partition plate 104, and the two ends of the heat exchange pipe 102 extend out of the top of the heat exchange tank 101. The heat exchange tank 101 is provided with a liquid inlet pipe 106 in communication with one end of the heat exchange pipe 102 and a liquid outlet pipe 107 in communication with the other end of the heat exchange pipe 102. The outer wall of the heat exchange pipe 102 is covered with a plurality of heat exchange fins. The low-temperature fluid enters the plurality of heat exchange pipes 102 through the liquid inlet pipe 106, exchanges heat with the gas flowing into the heat exchange tank 101, and then the fluid in the plurality of heat exchange pipes 102 enters the liquid outlet pipe 107 and is output. The liquid inlet pipe 106 and the liquid outlet pipe 107 can form a circulation loop, and a heat dissipation device is arranged on the circulation loop to dissipate heat from the fluid. The liquid inlet pipe 106 and the liquid outlet pipe 107 can also be arranged on the liquid inlet pipe 106 of other systems or devices, and the liquid needs to be heated subsequently. At this time, the heat in the gas can be used to preheat the liquid, realizing heat utilization.
[0037] The filtration unit 200 includes a cyclone separator and a cloth bag dust collector connected in sequence. The gas output from the heat exchange tank 101 sequentially passes through the cyclone separator and the cloth bag dust collector for particle removal and dust removal.
[0038] The combustion unit 300 is a regenerative thermal incinerator. The filtered gas enters the regenerative thermal incinerator, and the coal gas and part of the volatile organic compounds in the gas are burned. The remaining gas after combustion and the combustion tail gas are introduced into the purification unit 400.
[0039] The purification unit 400 includes a primary scrubbing tower and a secondary scrubbing tower in communication. The primary scrubbing tower performs desulfurization, and the secondary scrubbing tower performs denitrification. An alkaline absorbent such as sodium hydroxide or calcium hydroxide is used in the primary scrubbing tower, and sodium hypochlorite or urea solution is used as the scrubbing liquid in the secondary scrubbing tower.
[0040] The emission unit 500 includes an adsorption mechanism and a monitoring mechanism. The adsorption mechanism includes an air inlet pipe 503 and an air outlet pipe 504. The air inlet pipe 503 is in communication with the purification unit 400, and the air outlet pipe 504 is in communication with the monitoring mechanism. Two groups of adsorption assemblies are connected between the air inlet pipe 503 and the air outlet pipe 504. The adsorption assemblies include a first adsorption tank 501 and a second adsorption tank 502. The inlet end of the first adsorption tank 501 is in communication with the air inlet pipe 503, the outlet end of the first adsorption tank 501 is in communication with the inlet end of the second adsorption tank 502, and the outlet end of the second adsorption tank 502 is in communication with the air outlet pipe 504. The first adsorption tank 501 is filled with activated carbon, and the second adsorption tank 502 is filled with molecular sieve. Valves are arranged at the inlet and outlet of the adsorption assemblies, i.e., valves are arranged at the inlet end of the first adsorption tank 501 and the outlet end of the second adsorption tank 502. The two groups of adsorption assemblies work alternately, so that one group of adsorption assemblies works and the adsorption materials in the other group of adsorption assemblies are regenerated.
[0041] The monitoring mechanism comprises a monitoring cavity 505 communicated with the gas outlet pipe 504, an exhaust pipe 507 and a reflux pipe 506 communicated with the monitoring cavity 505, the reflux pipe 506 is communicated with the first washing tower, and the exhaust pipe 507 and the reflux pipe 506 are respectively provided with electromagnetic valves. The monitoring cavity 505 is provided with a gas online monitoring device, the gas online monitoring device monitors the concentrations of volatile organic compounds, sulfur oxides, nitrogen oxides and particulate matters in the gas, and the gas online monitoring device comprises a volatile organic compound detector, a sulfur dioxide monitor, a nitrogen oxide detection sensor and a particulate matter monitor. When the concentrations of volatile organic compounds, sulfur oxides, nitrogen oxides and particulate matters in the gas are normal, the electromagnetic valve on the reflux pipe 506 is closed, and the electromagnetic valve on the exhaust pipe 507 is opened to exhaust the gas; correspondingly, when the concentrations are abnormally high, the electromagnetic valve on the exhaust pipe 507 is closed, and the electromagnetic valve on the reflux pipe 506 is opened to make the gas reflux to the purification unit 400 for further purification and adsorption.
[0042] The utility model discloses a coke oven shutdown, the gas of purging is handled, avoids harmful substances such as coal gas, particulate matter, volatile organic compound, nitrogen oxide, sulfur oxide in the gas into the environment, reaches the purpose of environmental protection shutdown.
[0043] The above-mentioned embodiments are only preferred embodiments of the utility model, and are not the limitation of the technical scheme of the utility model, and as long as the technical scheme can be realized on the basis of the above-mentioned embodiments without creative labor, it should be considered that it falls into the protection scope of the utility model patent.
Claims
1. A coke oven shutdown system, characterized in that, include: Multiple carbonization chambers; The gas collection pipe connects to multiple carbonization chambers; The purge pipe and vent pipe are connected to the gas collecting pipe; The air supply pipe is connected to the purge pipe; The vent pipe is connected to an exhaust pipe, and the exhaust pipe is sequentially equipped with a heat exchange unit, a filtration unit, a combustion unit, a purification unit, and an emission unit.
2. The coke oven shutdown system according to claim 1, characterized in that, The heat exchange unit includes a heat exchange tank, which contains multiple heat exchange tubes covered with heat exchange fins. Both ends of the heat exchange tubes extend from the top of the heat exchange tank. An inlet pipe and an outlet pipe, respectively connected to both ends of the heat exchange tubes, are located above the heat exchange tank. Multiple drain pipes are located at the bottom of the heat exchange tank, and valves are installed on the drain pipes.
3. The coke oven shutdown system according to claim 2, characterized in that, The heat exchange tank is provided with multiple upper and lower baffles. The upper baffles are connected to the top of the heat exchange tank, and the lower baffles are connected to the bottom of the heat exchange tank.
4. The coke oven shutdown system according to claim 3, characterized in that, The multiple upper and lower partitions are arranged vertically and parallel to each other, and the multiple upper and lower partitions are arranged at intervals, forming a serpentine flow channel between the multiple upper and lower partitions.
5. The coke oven shutdown system according to claim 4, characterized in that, The heat exchange tubes are located in the flow channel between adjacent upper and lower partitions, and the heat exchange tubes are arranged in a serpentine pattern in the flow channel between the upper and lower partitions.
6. The coke oven shutdown system according to claim 1, characterized in that, The filtration unit includes a cyclone separator and a bag filter connected in sequence.
7. The coke oven shutdown system according to claim 1, characterized in that, The combustion unit is a regenerative thermal incinerator.
8. The coke oven shutdown system according to claim 1, characterized in that, The purification unit includes a primary washing tower and a secondary washing tower connected together. The primary washing tower uses an alkaline absorbent, which may be sodium hydroxide or calcium hydroxide. The secondary washing tower uses sodium hypochlorite or urea solution as the washing liquid.
9. The coke oven shutdown system according to any one of claims 1 to 8, characterized in that, The emission unit includes an adsorption mechanism and a monitoring mechanism connected together. The adsorption mechanism includes an inlet pipe and an outlet pipe. The inlet pipe is connected to the purification unit, and the outlet pipe is connected to the monitoring mechanism. Two sets of adsorption components are connected between the inlet pipe and the outlet pipe. The adsorption components include a first adsorption tank and a second adsorption tank connected in sequence. The first adsorption tank is filled with activated carbon, and the second adsorption tank is filled with molecular sieve. Valves are provided at the inlet and outlet of the adsorption components.
10. The coke oven shutdown system according to claim 9, characterized in that, The monitoring mechanism includes a monitoring chamber connected to the gas outlet pipe, an external discharge pipe and a return pipe connected to the monitoring chamber, the return pipe being connected to the purification unit, and both the external discharge pipe and the return pipe being equipped with solenoid valves. The monitoring chamber is equipped with an online gas monitoring device.