CN218795089U

CN218795089U - Coke oven flue gas desulfurization denitration system ammonia escape processing apparatus

Info

Publication number: CN218795089U
Application number: CN202222615086.1U
Authority: CN
Inventors: 田宝龙; 朱灿朋; 李义超
Original assignee: Beijing Shougang International Engineering Technology Co Ltd
Current assignee: Beijing Shougang International Engineering Technology Co Ltd
Priority date: 2022-10-01
Filing date: 2022-10-01
Publication date: 2023-04-07
Anticipated expiration: 2032-10-01

Abstract

An ammonia escape processing device of a coke oven flue gas desulfurization and denitrification system belongs to the technical field of coking flue gas desulfurization and denitrification treatment. The utility model mainly solves the problem of ammonia escape in the prior art. The treatment device comprises an ozone generator, a spoiler, a catalytic reaction bin and an ammonia escape analyzer. The ozone generator is arranged near a flue gas pipeline at the outlet of the desulfurization and denitrification system; the turbulator is arranged in the outlet flue gas pipeline; the catalytic reaction bin is arranged between the outlet flue gas pipeline and the chimney; and a sampling port of the ammonia escape analyzer is respectively arranged at the outlet flue gas pipeline and behind the catalytic reaction cabin. The utility model discloses the advantage lies in that the system flow is simple and direct, and accurate control ozone addition adopts the catalytic reaction storehouse, improves reaction efficiency, obviously reduces ammonia escape volume.

Description

Coke oven flue gas desulfurization denitration system ammonia escape processing apparatus

Technical Field

The utility model belongs to the technical field of coking flue gas desulfurization denitration treatment, in particular to coke oven flue gas desulfurization denitration system ammonia escape processing apparatus.

Background

The coke oven flue gas desulfurization and denitrification process mostly adopts SCR denitration and ammonia desulfurization, and both the two processes relate to the problem of ammonia escape treatment. The existing treatment mode is mainly as follows: 1) Controlling the ammonia spraying amount of denitration to avoid excessive ammonia concentration; 2) An ammonia catching section is additionally arranged after ammonia desulphurization, and escaped ammonia gas is caught by adopting water washing or acid washing. With the stricter environmental protection and the lower ammonia escape index, the current treatment means can not meet the requirements.

The utility model aims at providing a coke oven flue gas desulfurization deNOx systems ammonia escape processing apparatus.

The process can be used for accurately adjusting according to changes of the flue gas volume and the ammonia escape concentration, and controlling the ammonia escape at the outlet of the desulfurization and denitrification system to be less than or equal to 3mg/m in real time ³ And the emission requirement is met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coke oven flue gas desulfurization denitration system ammonia escape processing apparatus has solved the ammonia escape emission problem that exceeds standard in desulfurization denitration system export flue gas. A set of complete ammonia escape treatment device of the coke oven flue gas desulfurization and denitrification system is arranged, so that the stricter ammonia escape emission requirement can be met.

An ammonia escape processing device of a coke oven flue gas desulfurization and denitrification system comprises an ozone generator 1, a spoiler 2, a catalytic reaction chamber 3 and an ammonia escape analyzer 4; ozone generator 1 be connected with SOx/NOx control system export flue gas pipeline, SOx/NOx control system export flue gas pipeline connects gradually with spoiler 2, catalytic reaction storehouse 3 and chimney, SOx/NOx control system export flue gas pipeline is connected with 4 one end of ammonia escape analysis appearance, the 4 other ends of ammonia escape analysis appearance are connected with catalytic reaction storehouse 3 and chimney junction.

The ozone generator 1 is a high-voltage discharge type ozone generator.

And a catalyst and active ingredients are placed in the catalytic reaction chamber 3.

The catalyst is a titanium-based molecular sieve or activated carbon; the active components are copper oxide and manganese oxide.

The working steps of the ammonia escape treatment device of the coke oven flue gas desulfurization and denitrification system are as follows:

arranging an ammonia escape analyzer at a flue gas pipeline at the outlet of a desulfurization and denitrification system and at the outlet of a catalytic reaction bin, and controlling the adding amount of an ozone generator according to the data of the ammonia escape analyzer;

step two, fully mixing ozone generated by an ozone generator and the flue gas subjected to desulfurization and denitrification through a spoiler, and reacting the mixed gas in a catalytic reaction bin to reduce the escape amount of ammonia;

and step three, discharging the gas after the reaction through a chimney.

The utility model has the advantages that:

1. the method has the advantages of simple flow, accurate control of the ozone addition amount, adoption of the catalytic reaction cabin, improvement of the reaction efficiency and obvious reduction of the ammonia escape amount.

2. The raw materials are easy to obtain, and no waste water is generated.

3. The process is flexible in arrangement, can be adjusted according to the field condition, and is suitable for the modification project of the desulfurization and denitrification system.

4. The later maintenance and overhaul amount is small, production personnel are not increased, and the operation and control can be integrated into the original system.

Drawings

FIG. 1 is a schematic view of the apparatus. Wherein, ozone generator 1, spoiler 2, catalytic reaction storehouse 3, ammonia escape analysis appearance 4.

Detailed Description

Example 1

An ammonia escape processing device of a coke oven flue gas desulfurization and denitrification system comprises an ozone generator 1, a spoiler 2, a catalytic reaction bin 3 and an ammonia escape analyzer 4; wherein the ozone generator 1 is arranged near a flue gas pipeline at the outlet of the desulfurization and denitrification system; the turbulator 2 is arranged in the outlet flue gas duct; the catalytic reaction chamber 3 is arranged between the outlet flue gas pipeline and the chimney, and the sampling port 2 of the ammonia escape analyzer 4 is respectively arranged at the outlet flue gas pipeline and behind the catalytic reaction chamber 3. The ozone generator 1 is used for oxidizing oxygen in air (or pure oxygen is provided by an oxygen cylinder) into ozone, the adding amount of the ozone is accurately controlled according to data of the ammonia escape analyzer 4, the ozone is fully mixed with flue gas after passing through the spoiler 2 and fully reacts in the catalytic reaction chamber 3, and the effect of reducing the ammonia escape amount is achieved.

The ozone generator 1 is a high-voltage discharge type ozone generator, and the gas raw material is compressed air for instruments and is connected by a public and auxiliary medium pipe network. The air outlet is provided with an electric regulating valve and an ozone concentration detector, and the ozone generation amount can be regulated according to parameter feedback.

The spoiler 2 is a vane-type gas mixing device arranged at the downstream of the ozone adding port. The design of the blades is determined after flow field simulation, and the ozone concentration distribution is taken as a target value, and a scheme is optimized.

The catalytic reaction chamber 3 adopts I-shaped steel as a support frame to support a catalyst module, and a carbon steel wall plate is welded as a sealed chamber body, the catalyst adopts titanium-based activated carbon, and the active ingredients are copper oxide and manganese oxide. The cross section of the reaction bin takes the flow velocity not more than 3m/s as a design standard according to the actual smoke amount.

Ammonia escape analysis appearance 4 chooses extraction formula ammonia gas detection and analysis appearance for use, contains 2 sets of sampling probe, 1 sets of analysis unit, monitors former export flue gas pipeline department ammonia concentration and the 3 export pipeline department ammonia concentration of catalytic reaction storehouse simultaneously, and data can be shown on the spot and upload center control system in real time.

Claims

1. The utility model provides a coke oven flue gas desulfurization deNOx systems ammonia escape processing apparatus which characterized in that: the treatment device comprises an ozone generator (1), a spoiler (2), a catalytic reaction chamber (3) and an ammonia escape analyzer (4); ozone generator (1) be connected with SOx/NOx control system export flue gas pipeline, SOx/NOx control system export flue gas pipeline connects gradually with spoiler (2), catalytic reaction storehouse (3) and chimney, SOx/NOx control system export flue gas pipeline is connected with ammonia escape analysis appearance (4) one end, ammonia escape analysis appearance (4) other end is connected with catalytic reaction storehouse (3) and chimney junction.

2. The processing apparatus of claim 1, wherein: the ozone generator (1) is a high-voltage discharge type ozone generator.

3. The processing apparatus of claim 1, wherein: the catalytic reaction chamber (3) is filled with a catalyst and active ingredients.

4. The processing apparatus of claim 3, wherein: the catalyst is a titanium-based molecular sieve or activated carbon; the active components are copper oxide and manganese oxide.