A dust collector flue gas inlet flow field adjusting device

Abstract

This application provides a flue gas inlet flow field regulating device for a dust collector, comprising a regulating box with a regulating chamber inside. The regulating box has a first flue gas inlet, a second flue gas inlet, and a first flue gas outlet communicating with the regulating chamber. A flue gas input pipe is connected to the regulating box at the first flue gas inlet. A first intake fan is provided at the regulating box at the second flue gas inlet, and a first intake duct is connected to the first intake fan, which has a first air inlet communicating with the outside air. A first outlet fan is connected to the regulating box at the first flue gas outlet, and a flue gas output duct is connected to the first outlet fan. This device utilizes the regulating chamber to uniformly regulate the flue gas flow field before it enters the dust collector, allowing the flue gas to enter the dust collector more evenly and improving the dust collector's operating efficiency.

Description

Technical Field

[0001] This invention relates to the field of dust collectors for coal-fired power plants, and more specifically to a device for regulating the flow field at the flue gas inlet of a dust collector. Background Technology

[0002] Currently, due to factors such as the use of high-sulfur coal, incomplete combustion, and low burner efficiency, China's coal-fired power plants emit very large amounts of pollutants during operation. These pollutants mainly include particulate matter, SO2, and NO. X Particulate matter and other pollutants in flue gas have a significant impact on human health and the environment. Therefore, dust collectors are needed to remove pollutants from flue gas before it is emitted, reducing the environmental pollution caused by flue gas emissions. Common types of dust collectors include bag filters, electrostatic precipitators, and wet scrubbers.

[0003] In the existing technology, coal-fired power plants are equipped with flue gas input pipes, and flue gas dust removal pipes are directly connected to dust collectors to send the flue gas generated during the operation of the coal-fired power plant into the dust collectors.

[0004] However, the flue gas produced during the operation of coal-fired power plants is uneven, resulting in uneven entry of the flue gas into the dust collector. Since the dust collector operates at a certain power level, when the flow rate of flue gas entering the dust collector is too large, the dust removal effect of the dust collector will be poor, and the service life of the dust collector will also be reduced. When the flow rate of flue gas entering the dust collector is small, although the dust removal effect of the dust collector is improved, more energy will be wasted. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor uniformity of flue gas entering the dust collector in the prior art, thereby providing a flue gas inlet flow field adjustment device for a dust collector.

[0006] This application provides a flue gas inlet flow field adjustment device for a dust collector, including an adjustment box body. The adjustment box body has an adjustment chamber, and the adjustment box body is provided with a first flue gas inlet, a second flue gas inlet, and a first flue gas outlet communicating with the adjustment chamber. A flue gas input pipe is connected to the adjustment box body at the first flue gas inlet. A first air intake fan is provided at the second flue gas inlet of the adjustment box body, and a first air intake pipe is connected to the first air intake fan. The first air intake pipe has a first air inlet communicating with the outside air. A first air outlet fan is connected to the adjustment box body at the first flue gas outlet, and a flue gas output pipe is connected to the first air outlet fan.

[0007] In one embodiment, the first flue gas inlet is located at the bottom of the regulating box, and the first flue gas outlet is located at the top of the regulating box.

[0008] In one embodiment, a first one-way valve is provided at the first air inlet of the first air inlet duct, so that gas can only flow from the outside air into the first air inlet duct.

[0009] In one embodiment, the system further includes a transfer box, which contains a transfer chamber and a transfer pipe that connects the transfer chamber to the first air inlet pipe. The regulating box also has a second flue gas outlet and a second exhaust fan connected to the second flue gas outlet. An exhaust pipe connects the second exhaust fan to the transfer box.

[0010] In one embodiment, a three-way valve is provided at the connection between the first air inlet duct and the transfer duct.

[0011] In one embodiment, the transfer box is connected to a second air inlet duct, which has a second air inlet that communicates with the outside air.

[0012] In one embodiment, a second one-way valve is provided at the second air inlet of the second air inlet duct.

[0013] In one embodiment, both the first air inlet and the second air inlet are arranged facing downwards.

[0014] The flue gas inlet flow field regulating device for a dust collector provided in this application comprises a regulating box with a regulating chamber, and a flue gas inlet pipe and a flue gas outlet pipe connected to the regulating chamber. The flue gas inlet pipe is used to connect to the flue gas generating equipment of a coal-fired power plant, and the flue gas outlet pipe is used to connect to the dust collector. The flue gas generated by the coal-fired power plant first enters the regulating chamber, where the flow field of the flue gas is uniformly regulated before entering the dust collector. Then, a first outlet fan sends the relatively uniformly regulated flue gas into the dust collector. When a large amount of flue gas is produced, some of it can be stored in the regulating chamber to avoid excessive flue gas entering the dust collector. When a small amount of flue gas is produced, the flow rate entering the dust collector can be increased by storing some of the flue gas in the regulating chamber. Furthermore, when the amount of flue gas stored in the regulating chamber is small, outside air can be drawn into the regulating chamber through the first inlet fan and the first inlet pipe to increase the total gas content in the regulating chamber, ensuring that the flue gas has sufficient velocity and pressure to enter the dust collector. This improves the uniformity of flue gas as it enters the dust collector, ensuring that the dust collector can maintain effective and efficient dust removal. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the flue gas inlet flow field adjustment device for the dust collector in the embodiments of this application;

[0017] Figure 2 This is a partial cross-sectional view of the flue gas inlet flow field adjustment device of the dust collector in the embodiments of this application.

[0018] Explanation of reference numerals in the attached figures:

[0019] 100. Regulating box; 101. Regulating chamber; 102. First flue gas inlet; 103. First flue gas outlet; 104. Second flue gas inlet; 105. Second flue gas outlet; 110. Flue gas input pipe; 120. Flue gas output pipe; 130. First air inlet pipe; 140. Air outlet pipe;

[0020] 200. First exhaust fan;

[0021] 300. First air intake fan;

[0022] 400. First check valve;

[0023] 500. Transfer box; 510. Second air inlet duct; 520. Transfer duct;

[0024] 600. Second exhaust fan;

[0025] 700. Second check valve;

[0026] 800, three-way valve.

[0027] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Figure 1 and Figure 2 The diagram shows a dust collector flue gas inlet flow field adjustment device provided in this embodiment. It includes an adjustment box 100, which contains an adjustment chamber 101. The adjustment box 100 is provided with a first flue gas inlet 102, a second flue gas inlet 104, and a first flue gas outlet 103, all communicating with the adjustment chamber 101. A flue gas input pipe 110 is connected to the adjustment box 100 at the first flue gas inlet 102. A first air intake fan 300 is provided at the second flue gas inlet 104, and a first air intake pipe 130 is connected to the first air intake fan 300. The first air intake pipe 130 has a first air inlet communicating with the outside air. A first air outlet fan 200 is connected to the adjustment box 100 at the first flue gas outlet 103, and a flue gas output pipe 120 is connected to the first air outlet fan 200.

[0033] Specifically, the adjustment box 100 can be a cuboid, a cylinder, or other irregular shapes. The adjustment box 100 can be integrally formed from plastic material, or it can be formed by welding multiple steel plates, bricklaying, or concrete pouring. The choice can be made according to actual usage requirements, and no specific restrictions are imposed in this embodiment.

[0034] The interior of the regulating box 100 is hollow to form a regulating chamber 101 inside the regulating box 100. A first flue gas inlet 102, a second flue gas inlet 104, and a first flue gas outlet 103 are provided on the side wall of the regulating box 100. The first flue gas inlet 102, the second flue gas inlet 104, and the first flue gas outlet 103 can be circular or rectangular, depending on the specific configuration of the connected pipes.

[0035] One end of the flue gas inlet pipe 110 can be fixed to the side wall of the regulating box 100 by welding, snap-fitting or flange connection, and the flue gas inlet pipe 110 is connected to the regulating chamber 101 through the first flue gas inlet 102. The other end of the flue gas inlet pipe 110 is used to connect to the flue gas generating equipment of the coal-fired power plant, so that the flue gas generated during the operation of the coal-fired power plant can be transported into the regulating chamber 101 through the flue gas inlet pipe 110.

[0036] The first intake fan 300 is also connected to the side wall of the regulating box 100 and is connected to the regulating chamber 101 through the second flue gas inlet 104. One end of the first intake duct 130 is connected to the first intake fan 300 and the other end is open so as to be able to communicate with the outside air. When the first intake fan 300 is running, outside air can be drawn into the regulating chamber through the first intake duct 130.

[0037] The first exhaust fan 200 is also connected to the side wall of the regulating box 100 and is connected to the regulating chamber 101 through the first flue gas outlet 103. One end of the flue gas output pipe 120 is connected to the first exhaust fan 200 and the other end is connected to the inlet of the dust collector. When the first exhaust fan 200 is running, it can transport the flue gas in the regulating chamber 101 to the dust collector through the flue gas output pipe 120.

[0038] In practical use, a pressure sensor should be installed in the regulating chamber 101 to detect the pressure inside the regulating chamber 101. Furthermore, the pressure sensor, the first air intake fan 300, and the first air outlet fan 200 are all connected to the control system of the coal-fired power plant.

[0039] The flue gas produced by the coal-fired power plant first enters the regulating chamber 101 through the flue gas inlet pipe 110. At the same time, the first outlet fan 200 uniformly extracts the flue gas from the regulating chamber 101 and sends it to the dust collector. The flue gas is transferred in the regulating chamber 101. When the flue gas flow rate is large, it will be stored in the regulating chamber 101 and uniformly input into the dust collector under the action of the first outlet fan 200. When the flue gas flow rate is small, the flue gas stored in the regulating chamber 101 can be sucked into the dust collector. When the flue gas flow rate is small and the flue gas in the regulating chamber 101 is also small, the first inlet fan 300 is started to draw outside air into the regulating chamber 101 to mix with the flue gas, increase the internal pressure of the regulating chamber 101, and ensure that there is enough mixed gas in the regulating chamber 101 to be extracted by the first outlet fan 200. This helps to regulate the flow field of flue gas before it enters the dust collector, ensuring that the flow rate and pressure of the flue gas are uniform when it enters the dust collector. This allows the dust collector to maintain a certain power output and operate at a higher efficiency, thereby extending its service life and reducing energy consumption.

[0040] In some embodiments, the first flue gas inlet 102 may be located at the bottom of the regulating box 100, and the first flue gas outlet 103 may be located at the top of the regulating box 100.

[0041] Specifically, such as Figure 2 As shown, the first flue gas inlet 102 can be opened on the bottom side wall of the regulating box 100, and the first flue gas outlet 103 can be opened on the top side wall of the regulating box 100, so that the flue gas flows from bottom to top in the regulating box 100. Under the action of gravity, the flue gas will not flow directly from the first flue gas inlet 102 to the first flue gas outlet 103. After entering the regulating chamber 101, the flue gas can diffuse to all parts of the regulating chamber 101, so as to ensure that when the flue gas flow rate is large, the excess flue gas can be stored in the regulating chamber 101.

[0042] Of course, the first flue gas inlet 102 can also be opened at the bottom of a vertical side wall of the regulating box 100, and the first flue gas outlet 103 can be opened at the top of a vertical side wall of the regulating box 100. The purpose is to extend the flow path of the flue gas in the regulating chamber 101 and to fully diffuse it in the regulating chamber 101. In this embodiment, they will not be listed and described in detail.

[0043] Furthermore, in some embodiments, to prevent excessive flue gas in the regulating chamber 101 from flowing backwards into the outside air through the first air intake fan 300 and the first air intake duct 130, a first one-way valve 400 can be installed at the first air intake of the first air intake duct 130, so that the gas can only flow from the outside air into the first air intake duct 130, thus preventing the flue gas from entering the outside air without being filtered by the dust collector.

[0044] In some embodiments, the flue gas inlet flow field regulating device for the dust collector may further include a transfer box 500, which contains a transfer chamber. A transfer pipe 520 connecting the transfer chamber to the first inlet duct 130 is provided on the transfer box 500. The regulating box 100 also has a second flue gas outlet 105, and a second outlet fan 600 is connected to the second flue gas outlet 105. An outlet duct 140 connects the second outlet fan 600 to the transfer box 500.

[0045] The transfer box 500 can be rectangular, cylindrical, or other irregularly shaped. Its shape and volume can be the same as or different from the regulating box 100. The transfer box 500 is also hollow internally, forming a transfer chamber within it. The transfer box 500 and the regulating box 100 can be connected together or independent of each other. Alternatively, a partition can be installed within a single hollow box structure, dividing the interior into the regulating chamber 101 and the transfer chamber. No specific limitations are imposed in this embodiment.

[0046] The connection positions of the air outlet duct 140 and the transfer duct 520 on the transfer box 500 can be set according to actual needs. For example, to facilitate duct layout, the air outlet duct 140 can be connected to the side wall of the transfer box 500 facing the adjustment box 100, and the transfer duct 520 can be connected to the bottom of the transfer box 500. Both the transfer duct 520 and the air outlet duct 140 can be integrally formed on the transfer box 500, or they can be fixed to the transfer box 500 by welding, bolting, or other methods.

[0047] The connection between the transfer pipe 520 and the first air inlet pipe 130 is located between the two ends of the first air inlet pipe 130. Specifically, a three-way valve 800 can be provided at the connection between the first air inlet pipe 130 and the transfer pipe 520. The first air inlet pipe 130 is divided into a first connecting section and a second connecting section. The first air inlet is located on the first connecting section. The first connecting section, the second connecting section, and the transfer pipe 520 are respectively connected to the three ports of the three-way valve 800 to realize the connection between the transfer pipe 520 and the first air inlet pipe 130.

[0048] With the transfer box 500 in place, when the flue gas input flow is too large, causing the pressure in the regulating chamber 101 to be too high, the second exhaust fan 600 can be started to draw a small portion of the flue gas from the regulating chamber 101 into the transfer chamber for storage through the exhaust pipe 140. When the pressure in the regulating chamber 101 is low, the first intake pipe 130 and the transfer pipe 520 can be connected by controlling the three-way valve 800. At the same time, the first intake fan 300 is started to send the flue gas in the transfer chamber into the regulating chamber 101 to replenish the flue gas content in the regulating chamber 101 and ensure that enough flue gas is sent into the dust collector.

[0049] Of course, when the smoke content in the transfer room is also low or completely exhausted, the three-way valve 800 is switched again to draw in outside air through the first air inlet to replenish the gas content in the regulating chamber 101.

[0050] In order to prevent the formation of a negative pressure state in the transfer chamber when the flue gas is extracted, in some embodiments, a second air inlet duct 510 may be connected to the transfer chamber 500. The second air inlet duct 510 has a second air inlet that communicates with the outside air so that outside air can flow into the transfer chamber and maintain the pressure stability of the transfer chamber.

[0051] Of course, a second one-way valve 700 can be installed at the second air inlet of the second air inlet duct 510 so that the gas in the second air inlet duct 510 can only flow from the outside to the transfer chamber side, preventing the flue gas in the transfer chamber from flowing into the outside air through the second air inlet.

[0052] In addition, both the first and second air inlets can be configured to face downwards. For example, the first air inlet duct 130 is connected to the bottom of the regulating box 100 and extends vertically downwards, so that the first air inlet faces downwards. The second air inlet duct 510 is connected to the top of the transfer box 500, and the top of the second air inlet duct 510 is provided with a downward-curving arc structure, so that the second air inlet also faces downwards, which can prevent external pollutants or rain and snow from falling into the first air inlet duct 130 and the second air inlet duct 510.

[0053] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dust collector flue gas inlet flow field adjustment device, characterized in that, It includes a regulating box (100), which has a regulating chamber (101) inside, and the regulating box (100) is provided with a first flue gas inlet (102), a second flue gas inlet (104) and a first flue gas outlet (103) communicating with the regulating chamber (101). The regulating box (100) is connected to a flue gas input pipe (110) at the first flue gas inlet (102); the regulating box (100) is provided with a first air intake fan (300) at the second flue gas inlet (104), the first air intake fan (300) is connected to a first air intake pipe (130), the first air intake pipe (130) has a first air inlet communicating with the outside air; the regulating box (100) is connected to a first air outlet fan (200) at the first flue gas outlet (103), the first air outlet fan (200) is connected to a flue gas output pipe (120). The transfer box (500) is provided with a transfer chamber inside. The transfer box (500) is provided with a transfer pipe (520) that connects the transfer chamber to the first air inlet pipe (130). The regulating box (100) is also provided with a second flue gas outlet (105), and a second exhaust fan (600) is connected to the second flue gas outlet (105). An exhaust pipe (140) is connected between the second exhaust fan (600) and the transfer box (500).

2. The dust collector flue gas inlet flow field adjustment device according to claim 1, characterized in that, The first flue gas inlet (102) is located at the bottom of the regulating box (100), and the first flue gas outlet (103) is located at the top of the regulating box (100).

3. The dust collector flue gas inlet flow field adjustment device according to claim 1, characterized in that, A first one-way valve (400) is installed at the first air inlet of the first air inlet duct (130) so that gas can only flow from the outside air into the first air inlet duct (130).

4. The dust collector flue gas inlet flow field adjustment device according to any one of claims 1-3, characterized in that, A three-way valve (800) is provided at the connection between the first air inlet pipe (130) and the transfer pipe (520).

5. The dust collector flue gas inlet flow field adjustment device according to any one of claims 1-3, characterized in that, The transfer box (500) is connected to a second air inlet pipe (510), which has a second air inlet that communicates with the outside air.

6. The dust collector flue gas inlet flow field adjustment device according to claim 5, characterized in that, A second one-way valve (700) is provided at the second air inlet of the second air inlet duct (510).

7. The dust collector flue gas inlet flow field adjustment device according to claim 6, characterized in that, Both the first air inlet and the second air inlet are positioned downwards.

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