CN212511060U

CN212511060U - Low-nitrogen combustion steam superheating device taking coke oven gas as fuel

Info

Publication number: CN212511060U
Application number: CN202020692700.2U
Authority: CN
Inventors: 麻艺炜; 徐迎超
Original assignee: Beijing Shougang International Engineering Technology Co Ltd
Current assignee: Beijing Shougang International Engineering Technology Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2021-02-09
Anticipated expiration: 2030-04-29

Abstract

A low-nitrogen combustion steam superheating device using coke oven gas as fuel belongs to the technical field of waste heat recovery. Comprises a coke oven gas filter (1), an igniter (2), a steam superheating device (3), a blower (4), a circulating fan (5), a primary air pipeline (6), a secondary air pipeline (7), a smoke air pipeline (8), a chimney (9), an injection pipeline (10) and a smoke circulating pipeline (11); wherein, the steam superheating device (3) consists of a combustion chamber (31), a steam heat exchanger (32) and an air preheater (33). The method has the advantages that the saturated steam in the pipe network is heated by using the coke oven gas which is a by-product in the metallurgical industry, so that the waste gas generated by combustion can be ensured to meet the national emission standard of nitrogen oxides, and simultaneously, high-quality superheated steam is provided for users.

Description

Low-nitrogen combustion steam superheating device taking coke oven gas as fuel

Technical Field

The utility model belongs to the technical field of waste heat recovery, especially, a low-nitrogen combustion steam superheating device using coke oven gas as fuel is provided.

Background

The ferrous metallurgy industry is an important basic industry of the heavy industry in China, and is also an industry with high pollution, high energy consumption and complex industrial structure. Among them, the RH furnace widely used in the steel-making production area has the characteristics of high quality requirement and discontinuous use for steam supplied by a pipe network. In order to optimize the industry energy structure, improve energy utilization efficiency, reduce the production pollution, under the prerequisite of utilizing metallurgical industry production accessory substance as far as possible, the utility model discloses continuous improvement and then propose in a large amount of actual engineering application.

Disclosure of Invention

The utility model provides a low nitrogen combustion steam superheating device using coke oven gas as fuel, which is used for providing high-quality superheated steam for an RH furnace used in a steelmaking operation area according to the requirement under the condition of using the by-product of metallurgical industry-coke oven gas as fuel, and the emission of pollutants is in accordance with the relevant national requirements on nitrogen oxide emission through the low nitrogen combustion technology.

The utility model is realized by comprising a coke oven gas filter 1, an igniter 2, a steam superheating device 3, a blower 4, a circulating fan 5, a primary air pipeline 6, a secondary air pipeline 7, a smoke air pipeline 8, a chimney 9, an injection pipeline 10 and a smoke circulating pipeline 11; the steam superheating device 3 consists of a combustion chamber 31, a steam heat exchanger 32 and an air preheater 33.

The coke oven gas filter 1 is arranged on a coke oven gas pipeline, an igniter 2 is connected with a primary air pipeline 6, the coke oven gas pipeline is connected with a combustion chamber 31 of a steam superheating device 3, the combustion chamber 31, a steam heat exchanger 32 and an air preheater 33 form a steam superheating device whole, a circulating fan 5 is connected with a flue gas circulating pipeline 11 and connects a secondary air pipeline 7 into the combustion chamber 31, an air blower 4 sucks air from the air and then provides the air to the air preheater 33, the air preheated by the air preheater 33 is changed into primary air, and the air blower 4 is connected with a bypass to a chimney through an injection pipeline 10.

The steam superheater 3 is connected with a chimney 9 through a flue gas pipeline 8, and the chimney 9 is matched with an injection pipeline 10, so that the high-efficiency emission of combustion flue gas is facilitated.

The igniter 2 of the present invention adopts a nozzle form.

The utility model discloses the pipeline arrangement system of cooperation production. The factory pipe network provides coke oven gas to near the utility model discloses near, the pipe arrangement system adopts coke oven gas to be ignition fuel, sprays the burning through some firearm, forms the main fire in combustion chamber 31.

The pipeline arrangement system forms a flue gas recirculation system through a flue gas pipeline 8, a circulating fan 5 and a secondary air pipeline 7, and the secondary air pipeline 7 is directly connected with the combustion chamber 31.

The blower 4 in the ductwork system supplies the ejector air to the stack in addition to the air supply to the air preheater 33.

The utility model provides a heat source through the burning of the accessory substance of metallurgical industry-coke oven gas, heats the saturated steam in the pipe network and forms superheated steam, through the method of flue gas injection, flue gas circulation and overgrate air pipeline lug connection combustion chamber, reduces the production of nitrogen oxide in the combustion process, realizes the purpose of high-efficient burning environmental protection emission.

The utility model has the advantages of, the saturated steam that utilizes metallurgical industry's production accessory substance coke oven gas to in the pipe network heats, can be when guaranteeing that the waste gas that the burning produced accords with the national emission standard to nitrogen oxide, provides the superheated steam of high-quality to the user.

Drawings

FIG. 1 is a schematic view of a low-nitrogen combustion steam superheating apparatus using coke oven gas as a fuel, wherein COG represents coke oven gas. The device comprises a coke oven gas filter 1, an igniter 2, a steam superheating device 3, a combustion chamber 31, a steam heat exchanger 32, an air preheater 33, a blower 4, a circulating fan 5, a primary air pipeline 6, a secondary air pipeline 7, a smoke air pipeline 8, a chimney 9, an injection pipeline 10 and a smoke circulating pipeline 11.

Detailed Description

In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.

The pipeline arrangement system mainly comprises a factory pipe network for conveying coke oven gas to nearby, and the coke oven gas filter 1 filters the coke oven gas to reduce impurity components influencing the combustion effect in the coke oven gas.

The igniter 2 is in a nozzle form, fresh air provided by the blower 4 is changed into primary air after passing through the air preheater 33, and the primary air and the filtered coke oven gas are matched to be combusted in the combustion chamber 31 to form main flame, and the main flame is responsible for providing a heat source.

Circulating fan 5 extracts the flue gas after the burning from flue gas pipeline 8 through flue gas circulating line 11 and mixes with primary air pipeline 6 to provide overgrate air pipeline 7 and 3 combustion chamber 31 lug connection, can build poor oxygen combustion environment, be favorable to reducing the production of nitrogen oxide among the combustion process.

The pipe network carries saturated steam to the steam heat exchanger 32 in, through the optimal design to steam heat exchanger, can accomplish high-efficient heat transfer, makes saturated steam become superheated steam and send to user's department.

The steam superheater 3 is connected with a chimney 9 through a flue gas pipeline 9, and the chimney 9 is matched with an injection pipeline 10, so that the high-efficiency emission of combustion flue gas is facilitated.

The utility model is used for provide high-quality superheated steam to steelmaking RH stove, utilize coke oven gas to provide the heat source for fuel burning, carry out high-efficient heat transfer to superheated steam state to the saturated steam in the factory's comprehensive pipe network. In order to ensure that the smoke emission is more efficient and the components meet the national emission requirements, pipeline arrangement systems such as a 7-time secondary air pipeline, a 10-injection pipeline and a 11-smoke circulating pipeline are arranged.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A low-nitrogen combustion steam superheating device taking coke oven gas as fuel is characterized by comprising a coke oven gas filter (1), an igniter (2), a steam superheating device (3), a blower (4), a circulating fan (5), a primary air pipeline (6), a secondary air pipeline (7), a smoke air pipeline (8), a chimney (9), an injection pipeline (10) and a smoke circulating pipeline (11); wherein, the steam superheating device (3) consists of a combustion chamber (31), a steam heat exchanger (32) and an air preheater (33);

the coke oven gas filter (1) is arranged on a coke oven gas pipeline, an igniter (2) is connected with a primary air pipeline (6), the coke oven gas pipeline is connected with a combustion chamber (31) of a steam superheating device (3), the combustion chamber (31), a steam heat exchanger (32) and an air preheater (33) form a whole steam superheating device, a circulating fan (5) is connected with a flue gas circulating pipeline (11) and connects a secondary air pipeline (7) into the combustion chamber (31), an air blower (4) sucks air from the air and then provides the air to the air preheater (33), the air preheated by the air preheater (33) is changed into primary air, and the air blower (4) is connected with a bypass to a chimney through an injection pipeline (10); the steam superheating device (3) is connected with a chimney (9) through a flue gas pipeline 8.

2. The low-nitrogen combustion steam superheating device using coke oven gas as fuel according to claim 1, wherein the igniter (2) is in the form of a nozzle.