A system and method for reducing differential pressure of MGGH in operation

Abstract

The present invention provides a system and method for reducing the differential pressure of an MGGH in operation, which relates to the technical field of MGGH differential pressure reducing systems and can be used to clean the ammonium bisulfate adhering to the MGGH tube bundle and reduce the differential pressure of the MGGH in operation. The MGGH differential pressure reducing system of the present invention comprises a flushing water pipe installed on the MGGH tube bundle and provided with multiple flanges and valves and can extend into the MGGH tube bundle through the flange hole. The system for reducing the differential pressure of the MGGH in operation has low modification and operation costs, can reduce the differential pressure of the MGGH, has simple and reliable equipment, and can meet the requirements for reducing the differential pressure of the MGGH under the condition of not having shutdown flushing.

Description

Technical Field

[0001] The invention relates to a MGGH differential pressure reduction system, and in particular to a MGGH differential pressure reduction system and method in operation. Background Art

[0002] The tube bundle flue gas heat exchanger heats the chimney outlet flue gas to above 72°C through heat exchange, thereby increasing the exhaust temperature and eliminating white water vapor at the chimney outlet. However, during the long-term operation of the unit, due to the ultra-low emission demand for denitrification, the escape of ammonia injection leads to the formation of ammonium bisulfate, which adheres to the MGGH tube bundle. Over time, the MGGH differential pressure increases, and the unit needs to maintain operation and cannot be shut down for cleaning, which affects the stable and safe operation of the unit and increases the system energy consumption.

[0003] In the existing technical solutions, steam soot blowing technology is mainly used. However, because ammonium bisulfate is a viscous substance, the steam blowing effect is poor. In addition, due to the leakage of steam soot blowing pipelines and sealing rings, the blowing pressure drops, resulting in poor blowing effect. In addition, under continuous low load, insufficient blowing pressure is also the reason for the poor blowing capacity. Summary of the invention

[0004] The object of the present invention is to provide a system for reducing the differential pressure of an MGGH in operation, by providing a flushing water pipe on the top of the MGGH and connecting it to an external water source, so as to flush the substances in the flue. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A system for reducing differential pressure of an MGGH in operation includes a flushing water pipe installed on an MGGH tube bundle and provided with a plurality of flanges and valves, and capable of extending into the MGGH tube bundle through a flange hole; wherein:

[0007] Optionally or preferably, each of the flanges is mounted on the MGGH via a flange hole;

[0008] Optionally or preferably, the flange is mounted on the flange hole;

[0009] Optionally or preferably, the valve is mounted on a flange;

[0010] Optionally or preferably, the flushing water pipe comprises a flushing main pipe and at least two flushing branches;

[0011] Optionally or preferably, each of the flushing main water pipes is connected to a flushing branch pipe via a connecting hose;

[0012] Optionally or preferably, each of the flushing branches is also connected to the flushing main pipe via a movable connection.

[0013] Optionally or preferably, there is a flushing water source outside the flushing water pipe.

[0014] Optionally or preferably, the flushing water pipe can enter the interior of the MGGH tube bundle through a valve switch for flushing.

[0015] Optionally or preferably, the flushing water pipe is connected to the outlet main pipe of the demister flushing water pump through a water pipe.

[0016] Optionally or preferably, the flange is welded to the MGGH tube bundle.

[0017] Based on the above technical solution, the following technical effects can be produced:

[0018] An embodiment of the present invention provides a system for reducing the differential pressure of MGGH in operation, which is suitable for cleaning the ammonium bisulfate adhering to the MGGH tube bundle. An MGGH system for reducing the differential pressure of MGGH in operation of the present invention provides flanges and valves on the MGGH tube bundle, and uses a flushing water pipe that can be extended and inserted to achieve flushing of the substances in the flue, so as to solve the technical problem that the ammonium bisulfate adhering to the MGGH tube bundle is difficult to remove. The present invention is simple to modify, low in cost, has a significant cleaning effect, can effectively reduce the MGGH differential pressure, and can meet the requirements for reducing the MGGH differential pressure when the unit does not have the conditions of shutdown and flushing.

[0019] The present invention also provides a method for reducing the differential pressure of MGGH during operation, the steps of which are as follows:

[0020] Step S1: opening a plurality of flange holes on the MGGH tube bundle;

[0021] Step S2: welding a flange to each flange hole;

[0022] Step S3: a switchable valve is provided on each flange;

[0023] Step S4: When cleaning is required, open the valve, connect the flushing water pipe to an external water source and extend it into the MGGH tube bundle for flushing.

[0024] The invention discloses a method for reducing the differential pressure of MGGH during operation, which can effectively remove the ammonium bisulfate adhering to the MGGH tube bundle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the present invention (angle A is 90°);

[0027] Figure 2 This is a schematic diagram of the flushing water pipe structure of the present invention (angle A is 180°);

[0028] Figure 3 This is a schematic diagram of the side structure of the MGGH tube bundle of the present invention;

[0029] In the figure: 1, MGGH tube bundle; 2, flange; 3, valve; 4, flushing water pipe; 4-1, flushing main pipe; 4-2, connecting hose; 4-3, movable connection; 4-4, flushing branch pipe; A, the angle between the flushing main pipe and the flushing branch pipe. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0031] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0032] like Figure 1-3 As shown:

[0033] The present invention provides a system for reducing differential pressure of an MGGH in operation, comprising a plurality of flanges 2 and valves 3 installed on an MGGH tube bundle 1 and a flushing water pipe 4 that can extend into the MGGH tube bundle 1 through a flange hole; wherein:

[0034] Each of the flanges 2 is mounted on the MGGH tube bundle 1 through the flange hole 1-1;

[0035] The flange 2 is installed on the flange hole 1-1;

[0036] The valve 3 is installed on the flange 2;

[0037] The flushing water pipe 4 includes a flushing main pipe 4-1 and at least two flushing branch pipes 4-4;

[0038] Each of the flushing main water pipes 4-1 is connected to the flushing branch pipes 4-3 through a connecting hose 4-2;

[0039] Each of the flushing branch pipes 4-4 is also connected to the flushing main pipe 4-1 via a movable connection 4-3.

[0040] As an optional implementation, the flushing water pipe 4 has a flushing water source outside.

[0041] As an optional implementation, the flushing water pipe 4 can enter the interior of the MGGH tube bundle 1 through a valve switch for flushing.

[0042] As an optional implementation, the flushing water pipe 4 is connected to the outlet main pipe of the demister flushing water pump through a water pipe.

[0043] As an optional implementation, the flange 2 is welded to the MGGH tube bundle 1 .

[0044] As an optional implementation, the flushing branch pipe 4-3 can adjust the angle A between the flushing branch pipe 2-3 and the flushing branch pipe through a movable connection member 4-4.

[0045] As an optional implementation, the movable range of the angle A between the flushing branch pipe 4-3 and the flushing main pipe 4-1 is 90° to 180°.

[0046] The working process of the MGGH differential pressure reducing system in operation of the present invention is as follows: connect the external water source pipe, open the valve 3, extend the flushing water pipe, the water flows into the flushing water pipe 4, and enters the flushing branch pipe 4-3 through the flushing main pipe 4-1 and the connecting hose 4-2, so as to flush the ammonium bisulfate adhering to the MGGH tube bundle; the movable range of the angle A can be adjusted by adjusting the movable connecting member 4-4, so as to flush a wider range of the inner wall.

[0047] The present invention also provides a method for reducing the differential pressure of MGGH during operation, the steps of which are as follows:

[0048] Step S1: opening a plurality of flange holes 1-1 on the MGGH tube bundle 1;

[0049] Step S2: welding a flange 2 to each flange hole 1-1;

[0050] Step S3: a switchable valve 3 is provided on each flange 2;

[0051] Step S4: When cleaning is required, the valve 3 is opened, and the flushing water pipe 4 described in any one of claims 1 to 5 is connected to an external water source and extended into the MGGH tube bundle 1 for flushing.

[0052] The invention discloses a method for reducing differential pressure of MGGH in operation, wherein a flange hole 1-1 is arranged on an MGGH tube bundle 1 and a flange 2 is welded, and a switchable valve 3 is arranged on the flange 2, so that a flushing water pipe 4 is conveniently inserted for cleaning, thereby effectively removing ammonium bisulfate adhering to the MGGH tube bundle 1.

Claims

1. A MGGH pressure reduction system in operation, characterized in that: The invention comprises a flushing water pipe (4) installed on an MGGH tube bundle (1) and provided with a plurality of flanges (2) and valves (3), and capable of extending into the MGGH tube bundle (1) through a flange hole; wherein: Each flange (2) is mounted on the MGGH tube bundle (1) through a flange hole (1-1); The flange (2) is mounted on the flange hole (1-1); The valve (3) is mounted on the flange (2); The flushing water pipe (4) comprises a flushing main pipe (4-1) and at least two flushing branch pipes (4-4); Each of the flushing main pipes (4-1) is connected to a flushing branch pipe (4-4) via a connecting hose (4-2); Each flushing branch pipe (4-4) is also connected to the flushing main pipe (4-1) via a movable connection (4-3); The flushing water pipe (4) has a flushing water source outside; the flushing water pipe (4) can enter the interior of the MGGH tube bundle (1) through a valve switch for flushing; the flushing water pipe (4) is connected to the outlet main pipe of the demister flushing water pump through a water pipe; the flange (2) is welded to the MGGH tube bundle (1); The method for using the MGGH pressure reduction system in operation comprises the following steps: Step S1: opening a plurality of flange holes (1-1) on the MGGH tube bundle (1); Step S2: welding a flange (2) to each flange hole (1-1); Step S3: a switchable valve (3) is provided on each flange (2); Step S4: When cleaning is required, open the valve, connect the flushing water pipe (4) to an external water source and extend it into the MGGH tube bundle (1) for flushing.

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