A smoke guide device for rising pipes of fully enclosed or semi-enclosed coke ovens

Abstract

The present invention discloses a smoke guide device for a fully enclosed or semi-enclosed coke oven riser, which comprises a middle guide assembly and a roof guide assembly. The middle guide assembly comprises a middle top suction hood and a middle smoke guide pipe. There is a gap between the middle top suction hood and the top of the riser, and the top of the riser is located in the coverage area of ​​the middle top suction hood. The roof guide assembly comprises a roof hood and an outlet pipe, and the middle smoke guide pipe extends into the roof hood. The present invention adopts a combination of large and small hoods to solve the problem of smoke collection in the riser. The large hood is the roof hood, which is usually used to collect smoke from the coke oven machine side and ventilate the furnace top after closure, and is used to collect and export raw gas from the riser in the event of an accident. The small hood is the middle top suction hood, which can quickly guide the smoke from normal raw gas combustion or accidental release in the riser to the roof hood, solving the problem that the roof hood is far from the riser escape port and has a poor effect in collecting the smoke from the riser.

Description

Technical Field

[0001] The invention relates to the technical field of smoke dust treatment in a coking process, and in particular to a smoke guide device for a riser of a fully enclosed or semi-enclosed coke oven. Background Art

[0002] During the coking process, a large amount of smoke and dust will be generated in the machine side, coke side furnace door, furnace roof coal loading hole, fire viewing hole, riser discharge port, quenching tank car filled with coke, etc. Although the existing dust removal technology has been used to treat important dust source points such as the furnace roof coal loading hole and the machine coke side furnace door, the smoke capture effect is not ideal due to the limited space of the dust removal hood and the limited dust removal air volume, and it still cannot meet the latest environmental protection requirements. In addition, some of the scattered smoke and dust have not been collected and treated, and are still unorganized emissions. Therefore, it is necessary to develop new and reasonable treatment technologies to solve the problem of unorganized smoke and dust emissions in the coke oven body area.

[0003] The mainstream process route of existing process technology is to semi-close and fully close the coke oven body area, set dust collection measures such as dust collection hood and dust collection pipeline on the top, and set dust removal facilities such as dust collector, fan, chimney, etc. at the end. As shown in the following patents, CN107828430A "A coke oven dust collection hood", CN 109666487A "A coke oven sealing and ventilation dust removal device and method", CN109021988A "A side-supported fully enclosed coke oven smoke collection system and fugitive smoke collection method", CN 208980654U "A coke oven fugitive smoke fully enclosed collection and treatment device".

[0004] However, the biggest difficulty in sealing the coke oven is how to deal with the accidental release of the riser. In the normal coking process, the raw gas produced in the carbonization chamber is introduced into the gas collecting pipe to the blast cooling area through the riser. At the end of coking and before pushing the coke, the water seal cover on the top of the riser needs to be opened to burn the residual raw gas in the carbonization chamber and then lead it to the atmosphere. When the coke oven control system has sudden failures such as power failure of the blast cooling fan and ammonia water supply interruption, the pressure of the gas collecting system is too high, and the water seal cover of the riser will be forcibly opened to spray out high-temperature raw gas, even with flames. At this time, the local enclosed area has a high concentration of combustible gas and a high smoke temperature. After the coke oven top is sealed and covered, if this part of the raw gas is not discharged in time, there is a risk of explosion. In view of this working condition, existing patents have proposed some solutions, such as patent CN 109021985A "A riser structure and working method with protective effect on coke oven dust hood" and patent CN 109054871A "A linkage fire-guiding device for coke oven riser and its working method". The former (patent CN 109021985A) raises the existing riser and extends it outside the closed hood, and directly guides the raw gas of the riser out of the closed or semi-closed space, thereby achieving the purpose of protecting the dust hood. However, this approach still does not deal with the smoke generated by the riser's combustion during the normal coking process. Moreover, after the riser is raised, the furnace top operator cannot observe the flame conditions of the riser's combustion before coking, which has a great impact on the existing production operations. The latter (patent CN109054871A) sets a top suction hood just above the existing riser, and each riser corresponds to a top suction hood. The top suction hood outlet pipeline leads to the outside of the closed hood. When the smoke released by the riser overflows to the bottom of the top suction hood, the top suction hood and the outlet pipeline lead the released smoke (including flame) to the atmosphere through the chimney effect. Although this method will not affect the furnace top operator's observation of the flame during the release and combustion of the riser before coking, it still does not collect and process the smoke generated by the release and combustion during the normal coking process. Moreover, each riser is provided with a top suction hood and a release pipeline, and all this part of the load is added to the coke oven closed hood, which will be a major challenge to the specific design and implementation of the closed hood and its supporting structure. Summary of the invention

[0005] The purpose of the present invention is to address the defects and shortcomings of the prior art and to provide a riser smoke guide device for a fully enclosed or semi-enclosed coke oven, which can not only realize the rapid discharge of smoke released in the event of an accident in the riser from a closed or semi-enclosed coke oven to ensure the safety of the enclosed area, but also solve the problem of collecting and treating smoke generated by the released combustion during the normal coking process.

[0006] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a smoke-dispersing smoke guide device for an ascending pipe of a fully enclosed or semi-enclosed coke oven, comprising a middle guide assembly and a roof guide assembly which are sequentially arranged above the ascending pipe from bottom to top, the middle guide assembly comprising a middle top suction hood and a middle smoke guide pipe which are sequentially connected from bottom to top, the middle smoke guide pipe is arranged on a smoke guide pipe bracket, there is a gap between the middle top suction hood and the top of the ascending pipe, the coverage area of ​​the middle top suction hood is larger than the top diameter of the ascending pipe, and the top of the ascending pipe is located within the coverage area of ​​the middle top suction hood; the roof guide assembly comprises a roof hood and an outlet pipe which are sequentially connected from bottom to top, the middle smoke guide pipe extends into the roof hood, the outlet pipe is arranged on the roof and the outlet end passes through the roof to communicate with the outside world; a dust removal branch pipe is arranged on the outlet pipe, and a switching valve is arranged at the outlet end of the dust removal branch pipe; a discharge valve is arranged at the outlet end of the outlet pipe.

[0007] Preferably, the middle top suction hood is detachably arranged on the middle smoke guide pipe.

[0008] Preferably, the roof cover and the outlet pipe, as well as the outlet pipe and the dust removal branch pipe, are connected by welding; the middle smoke guide pipe and the smoke guide pipe bracket are connected by pipe support welding or bolts.

[0009] Preferably, a grid is provided on the roof, and the outlet pipe is welded to the grid via supports and hangers.

[0010] Preferably, the coverage area of ​​the roof cover is larger than the coverage area of ​​the middle top suction cover.

[0011] Preferably, 5 to 10 middle smoke guide pipes can extend into each of the roof covers.

[0012] Preferably, the middle top suction hood and the roof hood are both of large and small head type, that is, the size of the hood gradually decreases from bottom to top; the setting height of the roof hood is higher than the height of the coal loading car.

[0013] Preferably, both ends of the smoke guide pipe bracket are respectively welded or bolted to the extension bracket c and the extension bracket d; the extension bracket c and the extension bracket d are respectively arranged on the end platform resistance wall column a and the intermediate platform resistance wall column b.

[0014] Preferably, refractory materials are built or refractory coatings are applied at locations in the guide device that are easily exposed to high-temperature smoke or flames.

[0015] Preferably, the spacing length between the middle top suction cover and the top of the riser is greater than the height required to open the water sealing cover provided on the top of the riser.

[0016] Compared with the prior art, the present invention has achieved the following beneficial effects:

[0017] The smoke guide device for the riser of a fully enclosed or semi-enclosed coke oven provided by the present invention has the following beneficial effects: 1. The large and small hoods are used together to solve the smoke collection problem of the riser. The large hood is the roof hood, which is usually used to collect the smoke and dust on the side of the coke oven and ventilate the roof of the closed furnace. In the event of an accident, it is used to collect and guide the raw coal gas from the riser. The small hood is the middle top suction hood, which is close to the discharge port of the riser and has a good upward smoke guiding effect. It can quickly guide the smoke from normal raw gas combustion or accidental discharge of the riser to the roof hood, solving the problem that the roof hood is far from the discharge port of the riser and has a poor effect in collecting the overflowed smoke from the riser; 2. The middle top suction hood and the smoke guide pipe adopt movable connection methods such as flange bolt connection, which is easy to disassemble or shift, and does not affect the maintenance of the riser. The smoke guide pipe bracket can even be used as an auxiliary lifting point; 3. The middle top suction hood is not directly connected to the riser, and the height from the riser is greater than the height required to open the water seal cover of the riser, which does not affect the existing operating habits; 4. The load-bearing capacity of the middle top suction hood and the smoke guide pipe falls on the smoke guide pipe bracket, and the load of the smoke guide pipe bracket falls on the resistance wall columns at both ends of the coke oven, without increasing the load of the coke oven closed plant (or closed hood). 5. The roof hood outlet pipeline is divided into two routes, and the normal discharge of smoke and the emergency discharge of raw gas released by accidents are realized through valve switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic structural diagram of an embodiment of a riser smoke dispersing and dust collecting device for a fully enclosed or semi-enclosed coke oven of the present invention (excluding the grid);

[0020] Figure 2 It is a right view of a riser smoke dispersing and dust collecting device for a fully enclosed or semi-enclosed coke oven;

[0021] Figure 3 It is a main view of a riser smoke dispersing and dust collecting device for a fully enclosed or semi-enclosed coke oven;

[0022] Figure 4 The present invention is a top view of a riser smoke dispersing and dust collecting device for a fully enclosed or semi-enclosed coke oven.

[0023] Among them, 1. coke oven; 2. riser; 3. water seal cover; 4. gas collecting pipe; 5. middle top suction hood; 6. middle smoke guide pipe; 7. smoke guide pipe bracket; 8. roof cover; 9. outlet pipe; 10. dust removal branch pipe; 11. switching valve; 12. relief valve; 13. roof; 14. grid; 15. coal loading car; a. end platform resists wall column; b. intermediate platform resists wall column; c. end platform resists wall column extension bracket; d. intermediate platform resists wall column extension bracket. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The purpose of the present invention is to address the defects and shortcomings of the prior art and to provide a riser smoke guide device for a fully enclosed or semi-enclosed coke oven, which can not only realize the rapid discharge of smoke released in the event of an accident in the riser from a closed or semi-enclosed coke oven to ensure the safety of the enclosed area, but also solve the problem of collecting and treating smoke generated by the released combustion during the normal coking process.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-4 As shown, the present invention provides a smoke dispersing guide device for the riser 2 of a fully enclosed or semi-enclosed coke oven 1, comprising a middle guide assembly and a roof guide assembly which are sequentially arranged above the riser 2 from bottom to top, the middle guide assembly comprising a middle top suction hood 5 and a middle smoke guide pipe 6 which are sequentially connected from bottom to top, the middle smoke guide pipe 6 is arranged on a smoke guide pipe bracket 7, there is a gap between the middle top suction hood 5 and the top of the riser 2, the coverage area of ​​the middle top suction hood 5 is larger than the top diameter of the riser 2, and the top of the riser 2 is located within the coverage area of ​​the middle top suction hood 5; the roof guide assembly comprises a roof hood 8 and an outlet pipe 9 which are sequentially connected from bottom to top, the middle smoke guide pipe 6 extends into the roof hood 8, the outlet pipe 9 is arranged on the roof and the outlet end passes through the roof to communicate with the outside world; a dust removal branch pipe 10 is arranged on the outlet pipe 9, and a switching valve 11 is arranged at the outlet end of the dust removal branch pipe 10; a dispersing valve 12 is arranged at the outlet end of the outlet pipe 9.

[0028] The smoke guide tube bracket 7 is directly fixed on the ground or fixedly connected by other components, so that the positions of the middle top suction hood 5 and the middle smoke guide tube 6 are fixed. For example, the load-bearing capacity of the middle top suction hood 5 and the middle smoke guide tube 6 falls on the smoke guide tube bracket 7. The smoke guide tube bracket 7 adopts two non-standard HN steels as a simply supported beam structure with fixed ends. The span of the smoke guide tube bracket 7 is from the end platform resistance wall column to the middle platform resistance wall column of the coke oven 1. Brackets are erected at the original resistance wall column position as the two end columns of the smoke guide tube bracket 7; the middle top suction hood 5 is a circular trumpet mouth with a larger bottom and a smaller top, and the size of the lower mouth does not affect the movement of the coal loading car 15; in order to improve the collection effect and efficiency of the flue gas, the middle top suction hood 5 and the rising The pipes 2 are coaxially arranged; the middle top suction hood 5 mainly covers the water seal cover 3 located on the top of the riser 2, and the riser 2 is also connected to the gas collecting pipe 4, which is common knowledge in the field; above the roof hood 8 is the closed or semi-closed coke oven 1 factory roof 13, the factory adopts a double-layer grid 14 structure, the roof 13 is rooted on the lower grid structure, and the outlet pipe 9 connected to the roof hood 8 passes through the gap between the roof 13 and the grid 14 to enter the upper grid. When dust removal is carried out, the switching valve 11 is opened and the vent valve 12 is closed; when an accident occurs, the vent valve 12 is opened, that is, the switch between accident venting and dust removal is realized by switching the vent valve 12 of the outlet pipe 9 and the switching valve 11 of the dust removal branch pipe 10.

[0029] In order to facilitate the early stage of manufacturing, installation and later maintenance, the middle top suction hood 5 in the present invention is detachably arranged on the middle smoke guide pipe 6; wherein, the middle top suction hood 5 and the middle smoke guide pipe 6 are connected by movable connection methods such as flange bolt connection, which is convenient for disassembly or displacement to facilitate the maintenance space of the riser 2.

[0030] In order to improve the stability of the connection structure, the roof cover 8 and the outlet pipe 9 as well as the outlet pipe 9 and the dust removal branch pipe 10 are connected by welding; the middle smoke guide pipe 6 and the smoke guide pipe bracket 7 are connected by pipe support welding or bolts.

[0031] In the present invention, a grid 14 is arranged on the roof, and the outlet pipe 9 is welded and connected to the grid 14 through a support bracket.

[0032] In order to make the coverage area of ​​the roof cover 8 in the present invention larger than the coverage area of ​​the middle top suction cover 5.

[0033] In the present invention, 5 to 10 middle smoke guide pipes 6 can be inserted into each roof cover 8; further, the roof cover 8 is a square trumpet + a small straight section type, the length is the sum of the maximum spacing and the minimum center spacing of the corresponding 5 to 10 risers 2, the width is 3 to 4m, and the roof cover 8 is higher than the coal loading car 15 and its marking height.

[0034] In the present invention, the middle top suction hood 5 and the roof hood 8 are both of the large and small head type, that is, the size of the hoods gradually decreases from bottom to top; the setting height of the roof hood 8 is higher than the height of the coal loading car 15.

[0035] In the present invention, both ends of the smoke guide tube bracket 7 are respectively welded or bolted to the extension bracket c and the extension bracket d; the extension bracket c and the extension bracket d are respectively arranged on the end platform resistance wall column a and the intermediate platform resistance wall column b.

[0036] In order to improve the service life, refractory materials are built or refractory paints are applied to the parts of the guide device that are easily exposed to high-temperature smoke or flames; specifically, refractory materials are built between the middle top suction hood 5 and the inside of the smoke guide pipe, and refractory paints are applied to the middle top suction hood 5 and the outside of the smoke guide pipe, the smoke guide pipe bracket 7, the roof hood 8 and the local roof 13 corresponding to the top of the riser 2, the grid 14 and other parts.

[0037] In order to facilitate maintenance work, the distance between the middle top suction cover 5 and the top of the riser 2 in the present invention is greater than the height required to open the water seal cover 3 set on the top of the riser 2; as mentioned above, the middle top suction cover 5 is set to a detachable structure.

[0038] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A smoke guide device for a fully enclosed or semi-enclosed coke oven riser, characterized in that: It includes a middle guide assembly and a roof guide assembly which are sequentially arranged above the riser from bottom to top, the middle guide assembly includes a middle top suction hood and a middle smoke guide pipe which are sequentially connected from bottom to top, the middle smoke guide pipe is arranged on a smoke guide pipe bracket, there is a gap between the middle top suction hood and the top of the riser, the coverage area of ​​the middle top suction hood is larger than the top diameter of the riser, and the top of the riser is located within the coverage area of ​​the middle top suction hood; the roof guide assembly includes a roof hood and an outlet pipe which are sequentially connected from bottom to top, the middle smoke guide pipe extends into the roof hood, the outlet pipe is arranged on the roof and the outlet end passes through the roof to communicate with the outside world; the outlet pipe is provided with a dust removal branch pipe, the outlet end of the dust removal branch pipe is provided with a switching valve; the outlet end of the outlet pipe is provided with a relief valve.

2. The smoke guide device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 1, characterized in that: The middle top suction cover is detachably arranged on the middle smoke guiding pipe.

3. The smoke guide device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 1, characterized in that: The roof cover and the outlet pipe as well as the outlet pipe and the dust removal branch pipe are connected by welding; the middle smoke guide pipe and the smoke guide pipe bracket are connected by pipe support welding or bolts.

4. The smoke guide device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 1 or 3, characterized in that: A grid is arranged on the roof, and the outlet pipe is welded and connected to the grid via a support bracket.

5. The smoke guide device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 1, characterized in that: The coverage area of ​​the roof cover is larger than the coverage area of ​​the middle top suction cover.

6. The smoke guide device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 5, characterized in that: 5 to 10 middle smoke guide pipes can be inserted into each roof cover.

7. The smoke guiding device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 1 or 6, characterized in that: The middle top suction hood and the roof hood are both large and small head types, that is, the sizes of the hoods are gradually reduced from bottom to top; the setting height of the roof hood is higher than the height of the coal loading car.

8. The smoke guide device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 1, characterized in that: The two ends of the smoke guide pipe bracket are respectively welded or bolted to the extension bracket c and the extension bracket d; the extension bracket c and the extension bracket d are respectively arranged on the end platform resistance wall column a and the intermediate platform resistance wall column b.

9. The smoke guiding device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 1, characterized in that: In the guide device, refractory materials are built or refractory paint is applied in the parts that are easily exposed to high-temperature smoke or flames.

10. The smoke guide device for the riser of a fully enclosed or semi-enclosed coke oven according to claim 1, characterized in that: The spacing length between the middle top suction cover and the top of the riser is greater than the height required to open the water sealing cover arranged on the top of the riser.

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