CN217354516U

CN217354516U - SCR catalyst integral type spark arrester that can self-cleaning

Info

Publication number: CN217354516U
Application number: CN202220904974.2U
Authority: CN
Inventors: 王德荣; 聂金龙; 郭小炜; 程祥祥
Original assignee: Nantong Yatai Engineering Technology Co ltd
Current assignee: Nantong Yatai Engineering Technology Co ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-09-02
Anticipated expiration: 2032-04-19

Abstract

The utility model provides a but SCR catalyst integral type spark arrester of self-cleaning, including the casing, the one end of casing is air inlet, the other end is the gas outlet, set up the catalyst in the casing, the carrier of catalyst is located the below of catalyst, for the square flame arrester that catalyst structure is the same, the square flame arrester of square flame arrester is formed by fixed dimension's square pipe arrangement, be equipped with differential pressure transmitter between air inlet and the gas outlet, differential pressure transmitter is located outside the casing, be equipped with belt cleaning device in the casing, definition device 3 is including the nozzle of aiming at the catalyst, nozzle and air supply are connected, be provided with the air valve between nozzle and the air supply, air valve, differential pressure transmitter all communicate with PLC. The utility model discloses use the spark arrester with the catalyst as the carrier is integrated together, solved the big problem of current blast pipe bulk resistance, moreover can self-cleaning, make the catalyst resume the flow area, guarantee the long-term steady operation of device.

Description

SCR catalyst integral type spark arrester that can self-cleaning

Technical Field

The utility model belongs to the technical field of exhaust-gas treatment, concretely relates to but SCR catalyst integral type spark arrester of self-cleaning that is used for diesel engine, boiler tail gas treatment in inflammable and explosive place.

Background

The flame arrester is mainly used in various coal chemical enterprises in the early development stage, including mining sites and refinery plants, and is gradually expanded to the petrochemical industry later, and is installed at the inlet and outlet of various flammable and explosive substance storage tanks and each part of a conveying pipeline. With the improvement of productivity and the increasing perfection of industrial systems, the use of flame arresters gradually permeates into various industries such as water transportation, railway transportation, power systems and the like, and is integrated into the daily life of people. In developed countries such as the united states, germany and japan, it is clear that fire arresters of various types must be strictly required to reduce the probability of accidents in order to ensure safety in industrial production and manufacturing and life safety of workers involved. At present, the environment protection is vigorously advocated in China, the requirement on the NOx emission standard of a diesel engine is higher and higher, and in order to reach the emission standard, most of the discharge ports of the diesel engine are additionally provided with SCR devices, including diesel engines working in some dangerous areas. The SCR device and the flame arrester are additionally arranged on the exhaust pipeline, the overall resistance is large, and the performance of the diesel engine is influenced, so that the influence on the performance of the diesel engine is necessarily reduced as much as possible on the premise of environmental protection and safety.

Disclosure of Invention

1. The technical problem to be solved is as follows:

the SCR device and the flame arrester are additionally arranged on the exhaust pipe of the existing diesel engine, but the overall resistance is large, and the performance of the diesel engine is influenced.

2. The technical scheme is as follows:

in order to solve the above problem, the utility model provides a but SCR catalyst integral type spark arrester of self-cleaning, including the casing, the one end of casing is air inlet, the other end is the gas outlet, set up the catalyst in the casing, the carrier of catalyst is located the below of catalyst, and its essence is the square spark arrester, the square spark arrester is formed by fixed dimension's square pipe arrangement, be equipped with differential pressure transmitter between air inlet and the gas outlet, differential pressure transmitter is located outside the casing, be equipped with belt cleaning device in the casing, definition device 3 is including the nozzle of aiming at the catalyst, nozzle and air supply are connected, be provided with the air valve between nozzle and the air supply, air valve, differential pressure transmitter all communicate with PLC.

The size of the grid holes in the grid hole flame arrester is 23 mu m-3 mm.

And temperature transmitters are arranged at the air inlet and the air outlet of the shell.

The air source is compressed air.

The mesh number of the grids in the grid catalyst is 18-600 meshes.

The grid flame arrester is made of metal.

3. Has the advantages that:

the utility model discloses use the spark arrester with the catalyst as the carrier is integrated together, solved the big problem of current blast pipe bulk resistance, moreover can automatic start belt cleaning device, make the catalyst resume the flow area, guarantee the long-term steady operation of device.

Drawings

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

FIG. 2 is a schematic diagram of the structure of the catalyst.

Description of reference numerals: 1. a housing; 2. a temperature transmitter; 3. a cleaning device; 4. a differential pressure transmitter; 5. a catalyst.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a but SCR catalyst integral type spark arrester of self-cleaning, including casing 1, the catalyst is located casing 1, the carrier of catalyst 5 is located the below of catalyst 5, for the same square flame arrester of catalyst 5 structure, as shown in fig. 2.

As the number of the barrier sheets of the latticed hole flame arrester is doubled compared with that of a flat plate flame arrester with the same gap size, the probability of collision between flame active free radicals and a wall surface is increased by increasing the number of the barrier sheets, the heat dissipation effect of the flame arrester is enhanced, and the flame arresting performance of the flame arrester can be improved from the perspective of wall effect and heat transfer effect of a flame quenching principle.

In one embodiment, a differential pressure transmitter 4 is arranged between the air inlet and the air outlet, the differential pressure transmitter 4 is positioned outside the shell 1, a cleaning device 3 is arranged in the shell 1, the cleaning device 3 comprises a nozzle aligned with the catalyst 5, the nozzle is connected with the air source, an air valve is arranged between the nozzle and the air source, the air valve and the differential pressure transmitter 4 are both communicated with the PLC, the differential pressure transmitter 4 transmits the pressure difference between the air inlet and the air outlet of the shell 1 to the PLC, the PLC compares the received pressure difference with a set pressure difference threshold value, if the pressure difference is greater than the set threshold value, the blockage in grids of the catalyst and the flame arrester is indicated, the denitration and flame arresting performance is influenced, the PLC controls the air valve to be opened, the air source sprays gas to the catalyst 4 through the nozzle, the flow area of the catalyst is recovered, when the pressure difference acquired by the differential pressure transmitter 4 is smaller than the threshold value, and the PLC controls the air valve to be closed to finish automatic cleaning. Ensures the long-term stable operation of the device

In one embodiment, the air source is compressed air.

In one embodiment, the grid flame arrestor is formed by an array of square pipes of fixed size, and the mesh number of the grids is 18-600 meshes.

In one embodiment, the size of the grid openings in the grid flame arrestor is between 23 μm and 3 mm.

In one embodiment, the PLC model is Siemens S7-200. PLCs of similar performance are possible.

In one embodiment, the material of the grid flame arrestor is metal, and can be copper or iron or gold.

Claims

1. The utility model provides a but SCR catalyst integral type spark arrester of self-cleaning, includes casing (1), and the one end of casing (1) is the air inlet, the other end is the gas outlet, set up catalyst (5) in casing (1), its characterized in that: the carrier of catalyst (5) is located the below of catalyst (5), is the square flame arrester that catalyst (5) structure is the same, the square flame arrester is formed by fixed dimension's square pipe arrangement, be equipped with differential pressure transmitter (4) between air inlet and the gas outlet, differential pressure transmitter (4) are located outside casing (1), be equipped with belt cleaning device (3) in casing (1), belt cleaning device (3) are including the nozzle of aiming at catalyst (5), the nozzle is connected with the air supply, be provided with the air valve between nozzle and the air supply, air valve, differential pressure transmitter (4) all communicate with PLC.

2. A self-cleanable SCR catalyst integrated flame arrestor as defined in claim 1, wherein: the size of the grid holes in the grid flame arrester is 23 mu m-3 mm.

3. A self-cleanable SCR catalyst integrated flame arrestor as defined in claim 1, wherein: the PLC model is Siemens S7-200.

4. A self-cleanable SCR catalyst integral flame arrestor as defined in any one of claims 1-3, wherein: and temperature transmitters (2) are arranged at the air inlet and the air outlet of the shell (1).

5. A self-cleanable SCR catalyst integral flame arrestor as defined in any one of claims 1-3, wherein: the air source is compressed air.

6. A self-cleanable SCR catalyst integral flame arrestor as defined in any one of claims 1-3, wherein: the mesh number of the grids in the grid flame arrester is 18-600 meshes.

7. A self-cleanable SCR catalyst integral flame arrestor as defined in any one of claims 1-3, wherein: the grid flame arrester is made of metal.