Anti-blocking rake pipe of rake type soot blower

Abstract

The utility model discloses an anti-clogging rake pipe of a rake type soot blower, which comprises an air inlet pipe, a blowing rake pipe and a plurality of nozzles, the air inlet pipe is communicated with the blowing rake pipe, the lower end of the blowing rake pipe is provided with the nozzles, the input ends of the nozzles are provided with nozzle pipe bodies with closed upper ends, one side of each nozzle pipe body is provided with a nozzle flow guide groove hole, and the nozzle flow guide groove holes are communicated with the blowing rake pipe. Compared with the prior art, the soot blower has the advantages that the performance of the soot blower can be greatly improved, and long-term stable operation of a system is facilitated.

Description

Technical Field

[0001] The utility model relates to auxiliary equipment in the technical field of air pollution control, in particular to a rake tube of an anti-blocking rake type soot blower.

Background Art

[0002] Rake type soot blowers are widely used in environmental protection mechanical engineering, mainly for purging the heat exchange surface of boilers and the surface of catalysts in environmental protection equipment. Generally, superheated steam or compressed air is used as the purging medium to remove the ash deposited on the purged surface, thereby improving the thermal efficiency of the heat exchange surface and the catalytic activity of the catalyst, and avoiding catalyst blockage, poisoning, and corrosion, etc. The performance of the soot blower plays a decisive role in the system operation.

[0003] However, in the actual use process, the purging effect of the soot blower is often greatly reduced due to the blockage of the nozzles. Especially in SCR denitration in the cement industry, once the nozzles are blocked, it will cause large-area ash deposition on the catalyst, resulting in an increase in the differential pressure of the catalyst layer, an increase in system energy consumption, a decrease in the performance of the catalyst, and even failure.

[0004] In order to further achieve the efficient purging of the rake type soot blower, a rake tube of an anti-blocking rake type soot blower is specifically proposed.

Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems in the prior art, and propose a rake tube of an anti-blocking rake type soot blower, which can solve at least one of the above problems.

[0006] To achieve the above purpose, the utility model proposes a rake tube of an anti-blocking rake type soot blower, which includes an air inlet pipe, a blowing rake tube, and a plurality of nozzles. The air inlet pipe is communicated with the blowing rake tube. Nozzles are arranged at the lower end of the blowing rake tube. The input ends of the nozzles are all provided with nozzle tubes with closed upper ends. A nozzle diversion groove hole is arranged on one side of the nozzle tube. The width of the nozzle diversion groove hole is smaller than the diameter of the nozzle throat of the nozzle, and the area of the nozzle diversion groove hole is larger than the cross-sectional area of the nozzle throat.

[0007] Preferably, the blowing rake tube includes a main pipe body. Main pipe plugs are arranged at both ends of the main pipe body. The air inlet pipe is communicated with the middle position of the main pipe body.

[0008] Preferably, drain pipes are arranged on the lower sides of both ends of the main pipe body. Removable drain pipe plugs are arranged at the ends of the drain pipes.

[0009] Preferably, the lower end height of the nozzle diversion groove hole is higher than the height of the inner bottom of the blowing rake tube.

[0010] Advantages of the utility model: In this application, the input ends of the nozzles are each provided with a nozzle tube body closed at the upper end. A nozzle diversion groove hole is provided on one side of the nozzle tube body. The width of the nozzle diversion groove hole is smaller than the diameter of the nozzle throat of the nozzle, and the area of the nozzle diversion groove hole is larger than the cross-sectional area of the nozzle throat. This can effectively prevent impurities from blocking the nozzles of the rake-type soot blower rake pipes. Compared with the prior art, it can greatly improve the performance of the soot blower and is more conducive to the long-term stable operation of the system.

[0011] The features and advantages of the utility model will be described in detail through embodiments in conjunction with the drawings.

Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of a clogging-proof rake-type soot blower rake pipe of the utility model;

[0013] Figure 2 is a side view of a clogging-proof rake-type soot blower rake pipe of the utility model;

[0014] Figure 3 is a partial schematic structural diagram of a clogging-proof rake-type soot blower rake pipe of the utility model.

[0015] In the figure: 1 - intake pipe, 2 - injection rake pipe, 3 - nozzle, 4 - nozzle tube body, 5 - nozzle diversion groove hole, 21 - main pipe body, 22 - main pipe plug, 23 - drain pipe, 24 - drain pipe plug, 31 - nozzle throat.

Specific Embodiments

[0016] Refer to Figure 1 , Figure 2 and Figure 3 A clogging-proof rake-type soot blower rake pipe of the utility model includes an intake pipe 1, an injection rake pipe 2, and a plurality of nozzles 3. The intake pipe 1 is communicated with the injection rake pipe 2. The lower end of the injection rake pipe 2 is provided with nozzles 3. The input ends of the nozzles 3 are each provided with a nozzle tube body 4 closed at the upper end. A nozzle diversion groove hole 5 is provided on one side of the nozzle tube body 4. The width of the nozzle diversion groove hole 5 is smaller than the diameter of the nozzle throat 31 of the nozzle 3, and the area of the nozzle diversion groove hole 5 is larger than the cross-sectional area of the nozzle throat 31.

[0017] The injection rake pipe 2 includes a main pipe body 21. Both ends of the main pipe body 21 are provided with main pipe plugs 22. The intake pipe 1 is communicated with the middle position of the main pipe body 21.

[0018] Both lower sides of both ends of the main pipe body 21 are provided with drain pipes 23. The ends of the drain pipes 23 are each provided with detachable drain pipe plugs 24.

[0019] The lower end height of the nozzle diversion groove hole 5 is higher than the inner bottom height of the injection rake pipe 2.

[0020] Working process of the utility model:

[0021] During the working process of the rake-type soot blower rake pipe of the utility model which is anti-blocking, first of all, the soot blowing medium enters the spraying rake pipe 2 from the total intake pipe 1. The nozzles 3 are evenly arranged at the lower part of the spraying rake pipe 2. The spraying medium then enters the nozzle diversion groove holes 5 from the spraying rake pipe 2 respectively, and is sprayed onto the ash accumulation surface through the nozzles 3. The nozzles 3 are inserted into the interior of the spraying rake pipe 2. The width of the nozzle diversion groove holes 5 is smaller than the diameter of the nozzle throat 31, which can effectively block the particles larger than the nozzle throat 31 outside the nozzle diversion groove holes 5, avoid large particle impurities from entering the nozzle throat 31 and thus blocking the nozzles 3. At the same time, the gas flow area of the nozzle diversion groove holes 5 is larger than the flow cross-section of the nozzle throat 31, ensuring the medium flow rate of the nozzles 3 and the purging effect of the nozzles 3.

[0022] Since the nozzles 3 are vertically arranged, the large particles blocking outside the nozzle diversion groove holes 5 will fall to the bottom of the spraying rake pipe 2 when the soot blower stops spraying, and finally gather at both ends of the main pipe body 21 under the action of the flow of the spraying medium and its own inertia. Both ends of the main pipe body 21 are blocked by main pipe plugs 22, and an emptying pipe 23 is provided for collecting the impurity particles of the spraying medium. An emptying pipe plug 24 is arranged at the end of the emptying pipe 23. The emptying pipe plug 24 is detachable and can be regularly disassembled to clean the internal impurities.

[0023] The above embodiments are illustrative of the utility model, not limiting of the utility model. Any scheme obtained by simply changing the utility model belongs to the protection scope of the utility model.

Claims

1. A rake pipe of an anti-clogging rake sootblower, characterized in that: The invention comprises an air intake pipe (1), a spray rake pipe (2) and a plurality of nozzles (3), wherein the air intake pipe (1) is connected to the spray rake pipe (2), a nozzle (3) is provided at the lower end of the spray rake pipe (2), an input end of each nozzle (3) is provided with a nozzle tube body (4) with a closed upper end, a nozzle guide slot (5) is provided on one side of the nozzle tube body (4), a width of the nozzle guide slot (5) is smaller than a diameter of a nozzle throat (31) of the nozzle (3), and an area of ​​the nozzle guide slot (5) is larger than a cross-sectional area of ​​the nozzle throat (31).

2. The anti-clogging rake pipe of the rake type sootblower according to claim 1, characterized in that: The spray rake pipe (2) comprises a main pipe body (21), both ends of the main pipe body (21) are provided with main pipe plugs (22), and the air inlet pipe (1) is connected to the middle position of the main pipe body (21).

3. The anti-clogging rake pipe of the rake type sootblower according to claim 2, characterized in that: Drain pipes (23) are provided at the lower sides of both ends of the main pipe body (21), and detachable drain pipe plugs (24) are provided at the ends of the drain pipes (23).

4. An anti-clogging rake pipe of a rake sootblower according to any one of claims 1 to 3, characterized in that: The height of the lower end of the nozzle guide slot hole (5) is higher than the height of the bottom of the spray rake pipe (2).

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