CN214384164U

CN214384164U - SCR reactor

Info

Publication number: CN214384164U
Application number: CN202023157262.9U
Authority: CN
Inventors: 赵巍; 邢铁鹏; 孙福海; 郭欣彤
Original assignee: Huaneng Yimin Coal and Electricity Co Ltd
Current assignee: Huaneng Yimin Coal and Electricity Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-10-12
Anticipated expiration: 2030-12-24

Abstract

The embodiment of the present utility model provides an SCR reactor, which includes a reactor body and a catalyst layer, an inlet is arranged at the top of the reactor body, and a flue gas outlet is arranged at the bottom of the reactor body; In the reactor body, catalyst layers are evenly distributed at equal intervals in the vertical direction, and a plurality of guide plates are arranged at the inlet. A catalyst module is arranged along 5*17 on the catalyst layer; the catalyst layer is fixed in the reactor body by a steel frame, and the steel frame is welded by an I-beam. A steam sootblower is arranged in the body; in this solution, a deflector is arranged at the inlet of the reactor body, which can change the flow direction of the gas containing nitrides entering the reactor body and avoid gas accumulation on the side of the reactor body near the wall, so as to improve the denitration effect of the SCR reactor.

Description

SCR reactor

Technical Field

The utility model relates to a denitration system reactor technical field especially involves and is a SCR reactor.

Background

In order to implement the environmental protection law of the people's republic of China, the atmospheric pollution prevention law of the people's republic of China and the fixed internal combustion engine atmospheric pollutant emission standard of Beijing City (DB11-1056-2013), the operation, maintenance and management of the flue gas denitration system of the internal combustion engine set are standardized, the emission of nitric oxides of the internal combustion engine set is controlled, the environmental quality is improved, and the health of people is guaranteed. The novel efficient denitration SCR reactor is developed by combining the nitrogen oxide emission of the internal combustion engine set and the current exhaust emission control technology of the internal combustion engine, is arranged at the downstream of an exhaust tail pipe of the internal combustion engine set, and is used for controlling the nitrogen oxide emission to meet the relevant environmental protection requirements.

The existing SCR reactor is not provided with a flue gas guide device, the denitration effect cannot be ensured, and the emission of nitrogen oxides exceeds the national standard requirement.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a limestone cyclone, concrete technical scheme is as follows:

the embodiment of the utility model provides an SCR reactor, which comprises a reactor body and a catalyst layer, wherein the top of the reactor body is provided with an inlet, and the bottom of the reactor body is provided with a flue gas outlet; catalyst layers are uniformly distributed in the reactor body at equal intervals in the vertical direction, a plurality of guide plates are arranged at the inlet, each catalyst layer comprises three catalyst layers, the three catalyst layers are stacked, and catalyst modules are arranged on the catalyst layers along 5 x 17; the catalyst layer is fixed in the reactor body through a steel frame, the steel frame is formed by welding I-shaped steel beams, and a steam soot blower is arranged in the reactor body; the guide plate comprises a first plate group and a second plate group, the first plate group comprises a plurality of first arc-shaped plates, and the second plate group comprises a plurality of second arc-shaped plates; each first arc sets up along same direction, each the second arc sets up along same direction, the arc opening orientation of first arc the first inside wall of reactor body, the arc opening orientation of second arc the second inside wall of reactor body, first inside wall with the second inside wall is a set of relative inside wall of reactor body.

Further, the baffle is welded at the inlet.

Further, the size of the catalyst module is 1912mm × 974mm × 1145 mm.

Further, the intercept between the catalyst layer and the catalyst layer adjacent to the catalyst layer in the outermost layer is 7.4mm, and the distance between the catalyst layers is 3.5 m.

The embodiment of the utility model provides an SCR reactor, which comprises a reactor body, wherein an inlet is arranged at the top of the reactor body, and a flue gas outlet is arranged at the bottom of the reactor body; catalyst layers are uniformly distributed in the reactor body at equal intervals in the vertical direction, a plurality of guide plates are arranged at the inlet, each catalyst layer comprises three catalyst layers, the three catalyst layers are stacked, and catalyst modules are arranged on the catalyst layers along 5 x 17; the catalyst layer is fixed in the reactor body through a steel frame, the steel frame is formed by welding I-shaped steel beams, and a steam soot blower is arranged in the reactor body; the guide plate comprises a first plate group and a second plate group, the first plate group comprises a plurality of first arc-shaped plates, and the second plate group comprises a plurality of second arc-shaped plates; each first arc sets up along same direction, each the second arc sets up along same direction, the arc opening orientation of first arc the first inside wall of reactor body, the arc opening orientation of second arc the second inside wall of reactor body, first inside wall with the second inside wall is a set of relative inside wall of reactor body. In this scheme, be provided with the guide plate at the entrance of reactor body, can change the gaseous flow direction that contains the nitride that gets into the reactor body, avoid gaseous siltation near the lateral wall of reactor body to this denitration effect that improves the SCR reactor.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic structural diagram of an SCR reactor according to an embodiment of the present invention.

Reference numerals:

1, a reactor body, 2 inlets and 3 flue gas outlets; 4 catalyst layers, 5 guide plates, 6 catalyst layers, 7 first plate groups, 8 second plate groups and 9 steel frames.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail with reference to the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, an embodiment of the present invention provides an SCR reactor, including a reactor body 1 and a catalyst layer 6, wherein an inlet 2 is disposed at the top of the reactor body 1, and a flue gas outlet 3 is disposed at the bottom of the reactor body 1; catalyst layers 4 are uniformly distributed in the reactor body 1 at equal intervals in the vertical direction, a plurality of guide plates 5 are arranged at the inlet 2, each catalyst layer 4 comprises three catalyst layers 6, the three catalyst layers 6 are stacked, and catalyst modules are arranged on the catalyst layers 6 along the 5 x 17 direction; the catalyst layer 4 is fixed in the reactor body 1 through a steel frame 9, the steel frame 9 is formed by welding I-shaped steel beams, and a steam soot blower is arranged in the reactor body 1; the baffle 5 comprises a first plate group 7 and a second plate group 8, the first plate group 7 comprises a plurality of first arc-shaped plates, and the second plate group 8 comprises a plurality of second arc-shaped plates; each first arc sets up along same direction, each the second arc sets up along same direction, the arc opening orientation of first arc the first inside wall of reactor body 1, the arc opening orientation of second arc the second inside wall of reactor body 1, first inside wall with the second inside wall is a set of relative inside wall of reactor body 1.

Specifically, each unit is provided with two SCR reactors, the size of each SCR reactor is 10170mm multiplied by 17430mm multiplied by 12000mm (D multiplied by W multiplied by H), the clearance size of the cross section is 10170mm multiplied by 17430mm (D multiplied by W), and the sectional area is 177.26m 2. The flue gas flows vertically downwards, the calculated empty tower flow rate of the reactor is 4.32m/s, and the following requirements are met:

an inlet of the SCR device is provided with an ash hopper and an ash conveying device.

The reactor inlet 2 is provided with an airflow uniform distribution device, the reactor inlet 2 and the outlet section are provided with guide plates 5, and the parts which are easy to wear in the reactor are provided with wear-resistant alloy steel protection plates.

The reactor shell and support structure are made of Q345-B.

The various transverse reinforcing plates, the brackets, the seals, the steel frame 9 and the like in the reactor adopt section steels such as I-shaped steel beams and the like, square or rectangular (hollow) steel beams are not adopted, the reactor is designed into a type which is not easy to accumulate dust, and meanwhile, the compensation measure of thermal expansion must be considered. The catalyst supporting steel beam is made of section steel such as an I-shaped steel beam and the like, and the height requirement is larger than 500 mm.

The reactor is provided with a steam soot blower. And reserving the installation position of the standby layer.

The reactor was provided with 6-person manhole sizes of 800mm x 650 mm.

Each reactor inlet is provided with 1 set of independent NO/O2 flue gas analysis system (each set of matched 2-point sampling system). 1 set of independent NO/O2 flue gas analysis system (each set of matched 2-point sampling system) and 1 set of NH3 analysis system are arranged at the outlet of each reactor.

The embodiment of the utility model provides an SCR reactor, which comprises a reactor body 1, wherein an inlet 2 is arranged at the top of the reactor body 1, and a flue gas outlet 3 is arranged at the bottom of the reactor body 1; catalyst layers 4 are uniformly distributed in the reactor body 1 at equal intervals in the vertical direction, a plurality of guide plates 5 are arranged at the inlet 2, each catalyst layer 4 comprises three catalyst layers 6, the three catalyst layers 6 are stacked, and catalyst modules are arranged on the catalyst layers 6 along the 5 x 17 direction; the catalyst layer 4 is fixed in the reactor body 1 through a steel frame 9, the steel frame 9 is formed by welding I-shaped steel beams, and a steam soot blower is arranged in the reactor body 1; the baffle 5 comprises a first plate group 7 and a second plate group 8, the first plate group 7 comprises a plurality of first arc-shaped plates, and the second plate group 8 comprises a plurality of second arc-shaped plates; each first arc sets up along same direction, each the second arc sets up along same direction, the arc opening orientation of first arc the first inside wall of reactor body 1, the arc opening orientation of second arc the second inside wall of reactor body 1, first inside wall with the second inside wall is a set of relative inside wall of reactor body 1. In this scheme, be provided with guide plate 5 in the entry 2 department of reactor body 1, can change the gaseous flow direction that contains the nitride that gets into reactor body 1, avoid gaseous siltation near the lateral wall of reactor body 1 to this denitration effect that improves the SCR reactor.

Further, the baffle 5 is welded at the inlet 2.

Further, the size of the catalyst module is 1912mm × 974mm × 1145 mm.

2 layers of 20 multiplied by 20 hole honeycomb type catalysts with 7.4mm intercept are initially installed in the SCR device, a standby layer is arranged at the lowest layer, the space between 4 catalyst layers is 3.5m, each layer in a single reactor is provided with 85 (5 multiplied by 17) catalyst modules, and a single unit is provided with 509.49m3 catalysts.

Further, the intercept between the catalyst layer 6 at the outermost layer and the catalyst layer 6 adjacent to the outermost layer is 7.4mm, and the distance between the catalyst layers 4 is 3.5 m.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. an SCR reactor, comprising a reactor body, catalyst layering, an inlet is provided at the top of the reactor body, and a flue gas outlet is provided at the bottom of the reactor body; The catalyst layer is evenly distributed at equal intervals in the vertical direction, and it is characterized in that a plurality of guide plates are arranged at the inlet, and the catalyst layer includes three layers of the catalyst layer, and the three layers of the catalyst layer are arranged in layers. A catalyst module is arranged along 5*17 on the catalyst layer; the catalyst layer is fixed in the reactor body by a steel frame, and the steel frame is welded by an I-beam, and the catalyst layer is in the reactor body. A steam sootblower is arranged inside; the guide plate includes a first plate group and a second plate group, the first plate group includes a plurality of first arc-shaped plates, and the second plate group includes a plurality of second plate groups arc-shaped plates; each of the first arc-shaped plates is arranged in the same direction, and each of the second arc-shaped plates is arranged in the same direction, and the arc-shaped opening of the first arc-shaped plate faces the first arc of the reactor body The inner side wall, the arc-shaped opening of the second arc-shaped plate faces the second inner side wall of the reactor body, and the first inner side wall and the second inner side wall are a set of opposite sides of the reactor body. inner side wall.

2 . The SCR reactor of claim 1 , wherein the baffle is welded at the inlet. 3 .

3 . The SCR reactor according to claim 1 , wherein the size of the catalyst module is 1912 mm×974 mm×1145 mm. 4 .

4 . The SCR reactor according to claim 1 , wherein the intercept between the outermost catalyst layer and the adjacent catalyst layer is 7.4 mm, and the distance between the catalyst layers is 7.4 mm. 5 . is 3.5m.