CN215327897U

CN215327897U - Coke oven gas riser waste heat utilization economizer

Info

Publication number: CN215327897U
Application number: CN202122058012.8U
Authority: CN
Inventors: 李军; 张志宏; 王洪盛; 张新平
Original assignee: Shanxi Zhixin Baoneng Technology Co ltd
Current assignee: Shanxi Zhixin Baoneng Technology Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2021-12-28
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a coke oven gas riser pipe waste heat utilization energy-saving device, which comprises a coke oven machine, wherein the upper surface of the coke oven machine is fixedly communicated with a riser pipe, the upper end of the riser pipe is provided with a purification part, the upper surface of the purification part is fixedly communicated with a first connecting pipe and a second connecting pipe, the lower surface of a circulation box is respectively provided with a first opening and a second opening which are used for the first connecting pipe and the second connecting pipe to pass through and be fixedly connected with, and the surface of the first connecting pipe is provided with a first fan. The problem that low-temperature heat is discharged along with the coke oven gas is not utilized is solved.

Description

Coke oven gas riser waste heat utilization economizer

Technical Field

The utility model relates to the technical field of coke oven charging machines, in particular to a waste heat utilization energy-saving device for a coke oven gas riser.

Background

The coking industry is a large energy-consuming household, and the process energy consumption is about 110 kgce/t. In the energy expenditure of the coke oven, the sensible heat of the coke accounts for 37-39%, the heat taken away by the waste gas accounts for 15-21%, the sensible heat of the coke oven gas accounts for 32-36%, and the heat dissipation loss of the coke oven accounts for 10%. The coke oven gas is used as main coking by-product with complicated components, mainly comprising clean gas, water vapor, tar, crude benzene, etc. and has a temperature of about 850 ℃. According to the traditional process, circulating ammonia water at 70-80 ℃ is adopted to spray high-temperature coke-oven gas for direct quenching, high-temperature heat in the coke-oven gas is absorbed by vaporized ammonia and water vapor and then is changed into low-temperature heat at 80-85 ℃, and the low-temperature heat enters a primary cooler along with the coke-oven gas and is finally taken away by circulating water, so that a large amount of energy is wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a waste heat utilization energy-saving device for a coke oven gas ascending pipe, which is provided with a circulation structure that coke oven gas flows from a purification part to a first connecting pipe, a heating pipe to a second connecting pipe and then flows into the purification part to heat water in a circulation box, thereby achieving the purpose of using the heat of the coke oven gas as byproduct steam for cooling, synchronously reducing the amount of circulating water for cooling, replacing the original dry quenching steam with the byproduct steam for chemical product utilization by pressure reduction, achieving the effect of fully utilizing the waste heat of the coke oven gas for energy saving, and solving the problem that low-temperature heat is discharged along with the unused coke oven gas.

In order to achieve the purpose, the utility model provides the following technical scheme: an energy-saving device for utilizing waste heat of a coke oven gas ascending pipe comprises a coke oven machine, wherein the upper surface of the coke oven machine is fixedly communicated with the ascending pipe, the upper end of the ascending pipe is provided with a purification part, the upper surface of the purification part is fixedly communicated with a first connecting pipe and a second connecting pipe, the lower surface of a circulation box is respectively provided with a first opening and a second opening which are used for the first connecting pipe and the second connecting pipe to pass through and be fixedly connected with each other, the surface of the first connecting pipe is provided with a first fan, the end parts of the first connecting pipe and the second connecting pipe are communicated with a heating pipe together, the upper surface of the circulation box is provided with a through hole which a conveying pipe passes through and is fixedly connected with the conveying pipe, the conveying pipe is communicated with the heating pipe, two side walls of the circulation box are respectively communicated with an external water pipe and a circulation pipe, the surface of the circulation pipe is provided with a second fan, and the lower end of the circulation pipe is provided with a chemical product recovery part, and a third connecting pipe is arranged between the chemical product recovery part and the purification part.

Optionally, the purification part comprises a purification box, and two filter screens are installed on the inner wall of the purification box.

Optionally, the heating pipe is a high-position-resistant pipe.

Optionally, the chemical product recovery part is a chemical product recovery section.

Optionally, the number of the ascending pipes is two, and both the ascending pipes are spiral pipes.

Optionally, a conveying device is installed at the lower end of the coke oven machine, an air supply bin is installed at the lower end of the conveying device, and the air supply bin is communicated with an external steam generator.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the coke-oven gas is circulated from the purification part to the first connecting pipe, the heating pipe to the second connecting pipe and then to the purification part, so that water in the circulation box is heated, the heat of the coke-oven gas is used for producing byproduct steam, the amount of circulating water for cooling is synchronously reduced, the byproduct steam replaces the original dry quenching steam for chemical product utilization, and the effect of fully utilizing the waste heat of the coke-oven gas for energy saving is achieved.

Secondly, the utility model filters the dust repeatedly by repeatedly circulating the coke-oven gas on the filter screen, thereby achieving the effects of repeatedly filtering the coke-oven gas by utilizing the circulation effect and preventing the heating pipe from being influenced by excessive dust accumulated in the using time process of the heating pipe.

The utility model conveys the dry quenching coke to the gas supply bin through the conveying device to produce high-pressure steam, and the high-pressure steam can be completely used as a power generation raw material, so that the high-pressure steam of the dry quenching coke can be completely used for power generation, and no part of the high-pressure steam is separated to be used as internal pressure reduction of a chemical product recovery part, thereby reducing the energy consumption loss.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a cross-sectional view of the decontaminating member configuration of the present invention;

fig. 3 is a cross-sectional view of the circulation box structure of the present invention.

In the figure: 1. a coke oven machine; 2. a riser pipe; 3. a purification box; 4. a conveying device; 5. a gas supply bin; 6. a first connecting pipe; 7. a first fan; 8. a circulation box; 9. heating a tube; 10. a delivery pipe; 11. a second connecting pipe; 12. a circulation pipe; 13. a second fan; 14. a chemical product recovery section; 15. a third connecting pipe; 17. and (4) a filter screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: an energy-saving device for utilizing waste heat of a coke oven gas ascending pipe comprises a coke oven machine 1, wherein the upper surface of the coke oven machine 1 is fixedly communicated with the ascending pipe 2, the upper end of the ascending pipe 2 is provided with a purification component, the upper surface of the purification component is fixedly communicated with a first connecting pipe 6 and a second connecting pipe 11, the lower surface of a circulation box 8 is respectively provided with a first opening and a second opening which are used for the first connecting pipe 6 and the second connecting pipe 11 to pass through and be fixedly connected with, the surface of the first connecting pipe 6 is provided with a first fan 7, the end parts of the first connecting pipe 6 and the second connecting pipe 11 are communicated with a heating pipe 9, the upper surface of the circulation box 8 is provided with a perforation which is used for the conveying pipe 10 to pass through and be fixedly connected with, the conveying pipe 10 is communicated with the heating pipe 9, the two side walls of the circulation box 8 are respectively communicated with an external water pipe and a circulation pipe 12, the surface of the circulation pipe 12 is provided with a second fan 13, and the lower end of the circulation pipe 12 is provided with a chemical product recovery component, a third connecting pipe 15 is arranged between the chemical product recovery part and the purification part, coke-oven gas generated by the coke oven machine 1 enters the purification part along the ascending pipe 2 to be filtered, then the control valve is closed to prevent the coke-oven gas from flowing backwards, a first fan 7 is started, the first fan 7 enables the coke-oven gas to enter the heating pipe 9 from the purification box 3 along a first connecting pipe 6, then the coke-oven gas is reintroduced into the purification part through a second connecting pipe 11, the coke-oven gas is driven by the first fan 7 to flow from the purification part to the first connecting pipe 6 to the heating pipe 9 to the second connecting pipe 11 and then to the purification part to form circulation, water in the circulation box 8 is heated through the heating pipe 9 in the circulation process of the coke-oven gas to generate water vapor, the water vapor is imported into the chemical product recovery part from the circulating pipe 12 by a second fan 13, the coke oven machine 1 is subjected to pressure reduction treatment by the chemical product recovery part, and the coke oven is cooled, and the control valve on the second connecting pipe 11 is closed, the control valve on the conveying pipe 10 is opened, the cooled coke-oven gas is conveyed to the rear working section through the conveying pipe 10 under the action of the first fan 7, the heat of the coke-oven gas is used for producing the byproduct steam, the circulating water for cooling is synchronously reduced, the byproduct steam replaces the original dry quenching steam for chemical production utilization, and the effect of fully utilizing the waste heat of the coke-oven gas for energy saving is achieved.

In order to purify the dust in the coke oven gas, the purifying component further comprises a purifying box 3, and two filter screens 17 are arranged on the inner wall of the purifying box 3.

In order to prolong the service life of the heating pipe 9, the heating pipe 9 is further provided with a high-position resistant pipe for chemical production and pressure reduction, and the chemical production and recovery part is a chemical production and recovery section 14.

In order to share the exhaust pressure of one ascending pipe 2 and ensure that water does not leak into the coke oven machine 1 when the heat taking pipe group of the ascending pipe 2 leaks, the ascending pipes 2 are further arranged into two, and the two ascending pipes 2 are both arranged into spiral pipes.

In order to use dry quenching for high-pressure steam power generation, further, a conveying device 4 is installed at the lower end of the coke oven machine 1, a gas supply bin 5 is installed at the lower end of the conveying device 4, the gas supply bin 5 is communicated with an external steam generator, and dry quenching is conveyed into the gas supply bin 5 by the conveying device 4 to generate high-pressure steam which can be completely used as a power generation raw material, so that the high-pressure steam of the dry quenching can be completely used for power generation, a part of the high-pressure steam is not separated to be used as internal pressure reduction of a chemical product recovery part, and the energy consumption loss is reduced.

The working principle is as follows: when the coke oven gas ascending pipe waste heat utilization energy-saving device is used, coke oven gas generated by a coke oven machine 1 enters a purification box 3 along an ascending pipe 2 and is filtered by a filter screen 17, then a control valve is closed to prevent the coke oven gas from flowing backwards, a first fan 7 is started, the first fan 7 enables the coke oven gas to enter a heating pipe 9 from the purification box 3 along a first connecting pipe 6 and then to be reintroduced into the purification box 3 through a second connecting pipe 11, the coke oven gas is driven by the first fan 7 to flow from the purification box 3 to the first connecting pipe 6 to the heating pipe 9 to the second connecting pipe 11 and then to the purification box 3 to form circulation, water in a circulation box 8 is heated through the heating pipe 9 in the circulation process of the coke oven gas to generate steam, the steam is led into a chemical product recovery component from a circulation pipe 12 by a second fan 13, the coke oven machine 1 is subjected to pressure reduction treatment by the chemical product recovery component, the control valve on the second connecting pipe 11 is closed after the coke oven gas is cooled, the control valve on the conveying pipe 10 is opened, the cooled coke-oven gas is conveyed to the rear working section through the conveying pipe 10 under the action of the first fan 7, the heat of the coke-oven gas is used for producing the byproduct steam, the circulating water for cooling is synchronously reduced, the byproduct steam replaces the original dry quenching steam for chemical production utilization, and the effect of fully utilizing the waste heat of the coke-oven gas for energy saving is achieved.

The coke-oven gas is repeatedly circulated on the filter screen 17 to repeatedly filter dust, so that the effect of repeatedly filtering the coke-oven gas by utilizing the circulation effect is achieved, and the effect of preventing the heating pipe 9 from being influenced by excessive dust accumulated in the using time process.

The dry quenching is conveyed to the gas supply bin 5 by the conveying device 4 to produce high-pressure steam, and the high-pressure steam can be completely used as a power generation raw material, so that the high-pressure steam of the dry quenching can be completely used for power generation, and no part of the high-pressure steam is separated to be used as internal pressure reduction of a chemical product recovery part, and the energy consumption loss is reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a coke oven gas tedge waste heat utilization economizer, includes coke oven machine (1), its characterized in that: the upper surface of the coke oven machine (1) is fixedly communicated with an ascending pipe (2), the upper end of the ascending pipe (2) is provided with a purification component, the upper surface of the purification component is fixedly communicated with a first connecting pipe (6) and a second connecting pipe (11), the lower surface of a circulation box (8) is respectively provided with a first opening and a second opening, the first opening and the second opening are used for the first connecting pipe (6) and the second connecting pipe (11) to penetrate through and are fixedly connected with, the surface of the first connecting pipe (6) is provided with a first fan (7), the end parts of the first connecting pipe (6) and the second connecting pipe (11) are jointly communicated with a heating pipe (9), the upper surface of the circulation box (8) is provided with a through hole, the conveying pipe (10) penetrates through and is fixedly connected with the through hole, the conveying pipe (10) is communicated with the heating pipe (9), and two side walls of the circulation box (8) are respectively communicated with an external water pipe and a circulation pipe (12), the surface mounting of circulating pipe (12) has fan two (13), the lower extreme of circulating pipe (12) is installed the chemical product and is retrieved the part, the chemical product retrieve the part with install connecting pipe three (15) between the purification unit.

2. The coke oven gas riser waste heat utilization energy-saving device of claim 1, characterized in that: the purification component comprises a purification box (3), and two filter screens (17) are installed on the inner wall of the purification box (3).

3. The coke oven gas riser waste heat utilization energy-saving device of claim 1, characterized in that: the heating pipe (9) is a high-position resistant pipe.

4. The coke oven gas riser waste heat utilization energy-saving device of claim 1, characterized in that: the chemical product recovery part is a chemical product recovery section (14).

5. The coke oven gas riser waste heat utilization energy-saving device of claim 3, characterized in that: the ascending pipes (2) are arranged in two numbers, and the two ascending pipes (2) are both arranged in spiral pipes.

6. The coke oven gas riser waste heat utilization energy-saving device according to any one of claims 1 or 2, characterized in that: the coke oven machine is characterized in that a conveying device (4) is installed at the lower end of the coke oven machine (1), an air supply bin (5) is installed at the lower end of the conveying device (4), and the air supply bin (5) is communicated with an external steam generator.