CN210729158U

CN210729158U - SCR reactor

Info

Publication number: CN210729158U
Application number: CN201921275750.4U
Authority: CN
Inventors: 竺海峰; 张国平; 杨振仑; 钱卫清
Original assignee: Shanghai Canzhou Environmental Engineering Co ltd
Current assignee: Shanghai Canzhou Environmental Engineering Co ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-06-12
Anticipated expiration: 2029-08-08

Abstract

An SCR reactor relates to the technical field of combustion flue gas environmental protection treatment. It contains SCR reactor body, entry flue, baffle, export flue, first catalyst layer, second catalyst layer, reserves the catalyst layer, and SCR reactor body upper end is equipped with the entry flue, installs the baffle additional in the entry flue, and dislocation set around between two baffles sets up the export flue bottom the SCR reactor body, and inside from the top down of SCR reactor body sets gradually first catalyst layer, second catalyst layer and reserves the catalyst layer. After the technical scheme is adopted, the beneficial effects of the utility model are that: its structural design is reasonable, is favorable to ammonia and flue gas evenly distributed and abundant contact, is favorable to going on of denitration work, can satisfy the use of the ultralow emission requirement of nitrogen oxide (NOx), has very high spreading value.

Description

SCR reactor

Technical Field

The utility model relates to a burning flue gas environmental protection handles technical field, concretely relates to SCR reactor.

Background

Along with the continuous improvement of the environmental protection requirement of China, the waste incineration treatment becomes an important waste treatment and disposal mode, particularly more and more dangerous waste and medical waste incineration disposal plants and domestic waste incineration power plants are built, the level of the solid waste environmental protection treatment and disposal of China is greatly improved, and a suitable way is found for solving the problem of 'waste enclosure'. However, in parts of China, the pollution control requirement of a specific area is limited, higher requirements are put forward for the emission of the incinerator, the requirements of power plants and household garbage incineration plants are met to ultra-low emission, the emission concentration is further controlled for the incineration of dangerous wastes, and ultra-low emission is realized. In the Shandong area, the part of the pollution control core control area has already put forward the requirement of ultra-low emission of nitrogen oxides (NOx) in the flue gas, and the new projects in the area need to execute the standard requirement, and the dangerous waste incineration system faces more serious pressure. The structural design of the existing SCR reactor on the market at present is not reasonable enough, is not beneficial to the uniform distribution and the sufficient contact of ammonia gas and flue gas, can not meet the use of the ultralow emission requirement of nitrogen oxide (NOx), and is not suitable for popularization and use.

Disclosure of Invention

An object of the utility model is to prior art's defect and not enough, provide an SCR reactor, its structural design is reasonable, is favorable to ammonia and flue gas evenly distributed and abundant contact, is favorable to going on of denitration work, can satisfy the use of the ultralow emission requirement of nitrogen oxide (NOx), has very high spreading value.

In order to achieve the above purpose, the utility model adopts the following technical scheme: it contains SCR reactor body 1, entry flue 11, baffle 111, export flue 12, first catalyst layer 2, second catalyst layer 3, reserve catalyst layer 4, 1 upper end of SCR reactor body is equipped with entry flue 11, install baffle 111 additional in the entry flue 11, dislocation set around between two

baffle

111, 1 bottom of SCR reactor body sets up

export flue

12, 1 inside from the top down of SCR reactor body sets gradually first catalyst layer 2, second catalyst layer 3 and reserve catalyst layer 4.

The SCR reactor body 1 is of a vertical structure.

The catalyst forms in the first catalyst layer 2, the second catalyst layer 3 and the reserved catalyst layer 4 are honeycomb type or plate type.

The utility model discloses a theory of operation: firstly, ammonia gas evaporated by ammonia gas is mixed with the filtered and dedusted flue gas and sprayed into the SCR reactor through a distribution grid; carrying out reduction reaction on the catalyst in the SCR reactor and ammonia gas to generate N2 and H2O for denitration treatment; and discharging the flue gas subjected to denitration and purification treatment from the SCR reactor.

After the technical scheme is adopted, the utility model discloses beneficial effect does: its structural design is reasonable, is favorable to ammonia and flue gas evenly distributed and abundant contact, is favorable to going on of denitration work, can satisfy the use of the ultralow emission requirement of nitrogen oxide (NOx), has very high spreading value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a right side view corresponding to FIG. 1;

fig. 3 is a process flow diagram of the present invention.

Description of reference numerals: the device comprises an SCR reactor body 1, an inlet flue 11, a baffle 111, an outlet flue 12, a first catalyst layer 2, a second catalyst layer 3 and a reserved catalyst layer 4.

Detailed Description

Referring to fig. 1 to fig. 3, the technical solution adopted by the present embodiment is: the device consists of an SCR reactor body 1, an inlet flue 11, a baffle 111, an outlet flue 12, a first catalyst layer 2, a second catalyst layer 3 and a reserved catalyst layer 4, wherein the inlet flue 11 is arranged at the upper end of the SCR reactor body 1, the baffle 111 is additionally arranged in the inlet flue 11, the baffle 111 can be arranged to prolong the horizontal section distance of the inlet flue 11, namely, the distance of the flue gas entering the catalyst layer of the SCR reactor body 1 is prolonged, the flue gas can be mixed more uniformly in the flowing process, large-particle smoke dust is not easy to gather, the first catalyst layer 2, the second catalyst layer 3 and the reserved catalyst layer 4 are arranged in the SCR reactor body 1 from top to bottom, new catalyst can be installed in the position of the reserved catalyst layer 4, so as to reduce the replacement amount of the catalyst, and fully utilize the old catalyst which is not completely invalid, thereby reducing the replacement cost of the catalyst and improving the denitration efficiency.

The SCR reactor body 1 adopts a vertical structure.

The first catalyst layer 2, the second catalyst layer 3 and the catalyst arranged in the reserved catalyst layer 4 can be in a honeycomb type or plate type, and the honeycomb type catalyst is mainly characterized in that the activity of the catalyst in unit volume is high, the catalyst used for achieving the same denitration efficiency is small in volume, and the catalyst is suitable for a flue gas environment with ash powder lower than 30g/m3 and low ash viscosity. The plate catalyst uses a metal plate net as a framework and has a small specific surface area. The catalyst is characterized in that: has strong corrosion resistance and anti-blocking property, and is suitable for smoke environment with high ash content and strong ash viscosity. The disadvantages are low activity of the catalyst in unit volume, high relative load, large volume and more steel structures used.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

An SCR reactor characterized by: it contains SCR reactor body (1), entry flue (11), baffle (111), export flue (12), first catalyst layer (2), second catalyst layer (3), reserve catalyst layer (4), SCR reactor body (1) upper end is equipped with entry flue (11), install baffle (111) additional in entry flue (11), dislocation set around between two baffle (111), SCR reactor body (1) bottom sets up export flue (12), SCR reactor body (1) inside from the top down sets gradually first catalyst layer (2), second catalyst layer (3) and reserve catalyst layer (4).
2. The SCR reactor of claim 1, wherein: the SCR reactor body (1) is of a vertical structure.
3. The SCR reactor of claim 1, wherein: the catalyst forms in the first catalyst layer (2), the second catalyst layer (3) and the reserved catalyst layer (4) are honeycomb type or plate type.