A boiler flue gas dehumidification device

Abstract

The utility model belongs to the field of boiler flue gas treatment technology, concretely relates to a boiler flue gas dehumidification device. The device includes: purification bucket (2), conveying pipe (3), suction pipe (11), gas pump (12), condensing heat exchanger (10), loading bucket (15). The present application carries out preliminary dehumidification to flue gas through the depth filtration of double -deck dehumidification filter screen in purification bucket (2) first, then further heat exchange dehumidification to flue gas through condensing heat exchanger, can make the humidity of the exhaust flue gas greatly reduce. The device simple structure, convenient operation can be applicable to various types of boiler flue gas dehumidification treatment, has stronger practicality and popularization value.

Description

Technical Field

[0001] This utility model belongs to the field of boiler flue gas treatment technology, specifically relating to a boiler flue gas dehumidification device. Background Technology

[0002] Currently, in boiler flue gas dehumidification technology, the common structures mostly adopt a single dehumidification method, such as simple condensation or filtration. The principle is usually to use simple heat exchange between flue gas and cooling medium for dehumidification, or to intercept moisture through a single filter screen. The technical means and methods used are relatively traditional, mainly relying on fixed condensation equipment or single-layer filtration structure.

[0003] Existing boiler flue gas dehumidification technology has the following disadvantages:

[0004] 1. Low dehumidification efficiency: A single dehumidification method is insufficient to cope with changes in flue gas humidity under different operating conditions, and cannot achieve deep dehumidification. 2. Resource waste: Wastewater generated during the dehumidification process is directly discharged without recycling, resulting in water waste. 3. Inconvenient maintenance: The filter components in traditional dehumidification structures are mostly fixed, making disassembly and cleaning difficult and affecting the long-term operating efficiency of the equipment. 4. Incomplete purification: A single filtration structure is not effective at intercepting tiny moisture particles and other impurities in the flue gas, resulting in the discharged flue gas still containing a significant amount of moisture.

[0005] This application is made in order to solve at least one of the above problems. Utility Model Content

[0006] This application provides a boiler flue gas dehumidification device, the device comprising: a purification tank 2, a conveying pipe 3, an extraction pipe 11, an air pump 12, a condensing heat exchanger 10, and a loading tank 15;

[0007] One end of the conveying pipe 3 is connected to the air inlet at the bottom of the side wall of the purification tank 2 so that the flue gas input by the conveying pipe 3 enters the air inlet and diffuses along the inner wall of the purification tank 2. The other end of the conveying pipe 3 is used to connect to the boiler body 1.

[0008] The purification tank 2 is equipped with a double-layer dehumidification filter screen, wherein the double-layer detachable dehumidification filter screen includes an outer filter screen 7 and an inner filter screen 8. The pore size of the filter screen 7 is larger than that of the filter screen 8. The center of the double-layer dehumidification filter screen is the flue gas outlet channel 18.

[0009] The double-layer dehumidifying filter is provided with several circumferentially spaced mounting blocks 6 around its periphery, and the purification tank 2 is provided with several circumferentially spaced mounting grooves 5 inside. The mounting blocks 6 are detachably installed in the mounting grooves 5 so that the double-layer dehumidifying filter can be detachably installed in the purification tank 2.

[0010] The flue gas outlet channel 18 of the purification tank 2 is connected to the flue gas inlet of the condensing heat exchanger 10 through the exhaust pipe 11. The flue gas channel inside the condensing heat exchanger 10 is connected to the loading tank 15 below through the bottom pipe below to collect the wastewater generated by the condensation of wet flue gas. The flue gas outlet of the condensing heat exchanger 10 is connected to the exhaust pipe 14 to discharge the dehumidified dry flue gas.

[0011] The air pump 12 is installed on the air extraction pipe 11.

[0012] Preferably, the front end of the exhaust pipe 11 is located inside the purification tank 2, and the front end of the exhaust pipe 11 has an elbow, which is located in the flue gas outlet channel 18 to discharge the flue gas in the flue gas outlet channel 18.

[0013] Preferably, the condenser heat exchanger 10 is a shell-and-tube heat exchanger, with the shell side being the flue gas passage and the tube side being the condensate passage.

[0014] Preferably, the exhaust pipe 14 is provided with a valve 13.

[0015] Preferably, the loading tank 15 is provided with a drain pipe 16) for discharging wastewater, and the drain pipe 16) is provided with a valve 17.

[0016] Preferably, the center of the double-layer dehumidifying filter of the purification barrel 2 is the flue gas outlet pipe 19, the cavity of the flue gas outlet pipe forms the flue gas outlet channel 18, and the four sides of the flue gas outlet pipe 19 have through holes 20 so that the flue gas diffused on the inner wall of the purification barrel 2 passes through the double-layer dehumidifying filter and enters the flue gas outlet pipe 18 through the through holes 20.

[0017] The top of the flue gas outlet pipe 19 is connected to the extraction pipe 11 to discharge flue gas.

[0018] Preferably, a valve 4 is provided on the conveying pipe 3.

[0019] Preferably, the purification tank 2 is provided with a lid 9 on top to seal the purification tank 2.

[0020] Preferably, the mounting block 6 is disposed on the filter screen support, the filter screen support having a base frame for supporting the bottom of the double-layer dehumidifying filter screen, and the double-layer dehumidifying filter screen is disposed within the space enclosed by the base frame and the mounting block 6.

[0021] Compared with the prior art, this application has the following advantages:

[0022] 1. High dehumidification efficiency: This application first performs preliminary dehumidification of the flue gas through deep filtration of the double-layer dehumidification filter in the purification tank 2, and then further dehumidifies the flue gas through the condenser heat exchanger, which can significantly reduce the humidity of the discharged flue gas.

[0023] 2. Less resource waste: This application collects the wastewater droplets formed during the dehumidification process of the condenser heat exchanger 10, realizing waste utilization, reducing water waste, and lowering operating costs.

[0024] 3. Easy maintenance: The double-layer dehumidifying filter screen inside the purification tank 2 of this application is detachably connected to the inner wall of the purification tank through a slot. The double-layer dehumidifying filter screen is easy to disassemble and install, and is convenient for regular cleaning and replacement, ensuring the long-term efficient operation of the equipment.

[0025] 4. Thorough purification: The double-layer dehumidifying filter design inside the purification tank 2 of this application provides double-layer filtration of flue gas, improving the interception effect of moisture particles and impurities, and making the discharged flue gas drier and cleaner.

[0026] 5. Wide range of applications: The device has a simple structure and is easy to operate. It can be applied to the dehumidification treatment of flue gas from various types of boilers and has strong practicality and promotion value. Attached Figure Description

[0027] Figure 1 This is a schematic diagram showing the overall structure of the boiler flue gas dehumidification device of this application and the installation position of the boiler body 1.

[0028] Figure 2 This is a schematic diagram showing the positions of the boiler body 1, the conveying pipe 3, and the valve 4.

[0029] Figure 3 This is a schematic diagram of the internal structure of the purification tank 2, the double-layer dehumidification filter, and the exhaust pipe 11.

[0030] Figure 4 This is a schematic diagram of the structure of the condenser heat exchanger 10, the loading tank 15, and their connecting pipes.

[0031] Figure 5 This is a schematic diagram of the structure of flue gas outlet pipe 19.

[0032] List of reference numerals in the attached diagram:

[0033] 1. Boiler body, 2. Purification tank, 3. Conveying pipe, 4. Valve 1, 5. Mounting slot, 6. Mounting block, 7. Filter screen 1, 8. Filter screen 2, 9. Cover, 10. Condensing heat exchanger, 11. Exhaust pipe, 12. Air pump, 13. Exhaust pipe, 14. Valve 3, 15. Loading tank, 16. Drain pipe, 17. Valve 2, 18. Flue gas outlet passage, 19. Flue gas outlet pipeline, 20. Through hole. Detailed Implementation

[0034] The present application will now be described in further detail with reference to the embodiments.

[0035] Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be construed as limiting the scope of this application. Where specific techniques or conditions are not specified in the embodiments, they are performed in accordance with the techniques or conditions described in the literature in the field or according to the product manual. Materials or equipment whose manufacturers are not specified are all conventional products that can be obtained by purchase.

[0036] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. In the description of this application, unless otherwise stated, “a plurality” means two or more. It should be further understood that the term “comprising” as used in the specification of this application means the presence of the stated feature, integer, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” to another element, it can be directly connected to the other element, or there may be an intermediate element. Furthermore, the term “connected” as used herein can include wireless connections.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 this application and 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 this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0042] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0043] Figure 1 This is a schematic diagram showing the overall structure of the boiler flue gas dehumidification device of this application and the installation position of the boiler body 1.

[0044] Figure 2 This is a schematic diagram showing the positions of the boiler body 1, the conveying pipe 3, and the valve 4.

[0045] Figure 3 This is a schematic diagram of the internal structure of the purification tank 2, the double-layer dehumidification filter, and the exhaust pipe 11.

[0046] Figure 4 This is a schematic diagram of the structure of the condenser heat exchanger 10, the loading tank 15, and their connecting pipes.

[0047] like Figure 1-4A boiler flue gas dehumidification device, the device comprising: a purification tank 2, a conveying pipe 3, an extraction pipe 11, an air pump 12, a condensing heat exchanger 10, and a loading tank 15;

[0048] One end of the conveying pipe 3 is connected to the air inlet at the bottom of the side wall of the purification tank 2 so that the flue gas input by the conveying pipe 3 enters the air inlet and diffuses along the inner wall of the purification tank 2. The other end of the conveying pipe 3 is used to connect to the boiler body 1.

[0049] like Figure 3 The purification tank 2 is equipped with a double-layer dehumidifying filter, which includes an outer filter screen 7 and an inner filter screen 8. The pore size of the outer filter screen 7 is larger than that of the inner filter screen 8. The center of the double-layer dehumidifying filter is the flue gas outlet channel 18. For example, the pore size of the outer filter screen 7 is 300 micrometers, and the pore size of the inner filter screen 8 is 100 micrometers, to remove dust and droplets from the flue gas in stages. The filter screen material can be a sintered metal mesh, such as stainless steel, which has high mechanical strength and can be repeatedly washed. Of course, those skilled in the art can also choose other suitable materials. Furthermore, the pore size and material of the filter screen can be modified according to different types of boiler flue gas.

[0050] The double-layer dehumidifying filter is provided with four circumferentially spaced mounting blocks 6 around its periphery, and the purification tank 2 is provided with four circumferentially spaced mounting slots 5 inside. The mounting blocks 6 are detachably installed in the mounting slots 5 so that the double-layer dehumidifying filter can be detachably installed in the purification tank 2.

[0051] Both the mounting groove 5 and the mounting block 6 extend along the axial direction of the purification tank 2.

[0052] Preferably, the mounting block 6 is disposed on the filter screen support. The filter screen support has a base frame for supporting the bottom of the double-layer dehumidifying filter screen. The double-layer dehumidifying filter screen is surrounded by the mounting block 6. The double-layer dehumidifying filter screen is disposed within the space enclosed by the base frame and the mounting block 6.

[0053] The flue gas outlet channel 18 of the purification tank 2 is connected to the flue gas inlet of the condensing heat exchanger 10 via the exhaust pipe 11. The flue gas channel inside the condensing heat exchanger 10 is connected to the loading tank 15 below via the bottom pipe to collect wastewater generated by the condensation of wet flue gas. The flue gas outlet of the condensing heat exchanger 10 is connected to the exhaust pipe 14 to discharge the dehumidified dry flue gas. The flue gas outlet of the condensing heat exchanger 10 is located in the middle or upper part of the condensing heat exchanger 10.

[0054] The flue gas inlet and flue gas outlet of the condenser heat exchanger 10 are both located on the outer shell of the condenser heat exchanger 10.

[0055] The air pump 12 is installed on the air extraction pipe 11.

[0056] The purification tank 2 is provided with a lid 9 on top to seal the purification tank 2. The lid 9 and the purification tank 2 can be connected by threads.

[0057] Sealing elements can be installed at the contact points between the purification tank 2 and the lid 9, the exhaust pipe 11, and the delivery pipe 3 to prevent flue gas leakage. For example, elastic sealing elements such as silicone rubber rings or fluorosilicone rubber rings can be used. Alternatively, sealant can be applied to the joints to achieve a seal.

[0058] Preferably, the front end of the exhaust pipe 11 is located inside the purification tank 2, and the front end of the exhaust pipe 11 has an elbow, which is located in the flue gas outlet channel 18 to discharge the flue gas in the flue gas outlet channel 18.

[0059] Preferably, the condensing heat exchanger 10 is a shell-and-tube heat exchanger, with the shell side serving as the flue gas passage and the tube side as the condensate passage. Condensate flows through the tube side.

[0060] Preferably, the exhaust pipe 14 is provided with a valve 13.

[0061] Preferably, the loading tank 15 is provided with a drain pipe 16) for discharging wastewater, and the drain pipe 16) is provided with a valve 17.

[0062] Preferred implementation methods are as follows Figure 5 As shown, the center of the double-layer dehumidifying filter of the purification tank 2 is the flue gas outlet pipe 19. The cavity of the flue gas outlet pipe forms a flue gas outlet channel 18. The four sides of the flue gas outlet pipe 19 have through holes 20 so that the flue gas diffused from the inner wall of the purification tank 2 passes through the double-layer dehumidifying filter and enters the flue gas outlet pipe 18 through the through holes 20.

[0063] The top of the flue gas outlet pipe 19 is connected to the extraction pipe 11 to discharge flue gas. At this time, the front end of the extraction pipe 11 is located inside the purification tank 2. The front end of the extraction pipe 11 has an elbow, which is connected to the flue gas outlet pipe 19 to discharge the flue gas in the flue gas outlet channel 18.

[0064] Preferably, a valve 4 is provided on the conveying pipe 3.

[0065] The air pump 12 is connected to the power control system in a conventional manner to control the air pump to turn on.

[0066] The working principle of this application is as follows:

[0067] First, the delivery pipe 3 is connected to the air outlet of the boiler body 1. Then, the valve 4 is opened to allow the flue gas to enter the purification tank 2 through the air inlet at the bottom of the purification tank 2, and then diffuse along the inner wall of the purification tank 2.

[0068] The air pump 12 is connected to the flue gas outlet channel 17 at the center of the double-layer dehumidifying filter screen in the purification tank 2 via the air extraction pipe 11. Under the action of the air pump 12, the flue gas flows from the inner wall of the purification tank 2 to the center. At this time, the moisture in the flue gas passes through the double-layer detachable dehumidifying filter screen in the purification tank 2 in sequence. The outer filter screen first intercepts larger moisture particles and impurities in the flue gas, and the inner filter screen second further refines the filtration of the flue gas, removing small moisture particles and remaining impurities, thus achieving the first stage of dehumidification and purification. Finally, it enters the air extraction pipe 11 along the flue gas outlet channel 17 at the center of the double-layer dehumidifying filter screen.

[0069] Air pump 12 draws the flue gas from extraction pipe 11 into condenser heat exchanger 10. Upon entering, the moisture in the flue gas comes into contact with the low-temperature surface of the inner tube wall of condenser heat exchanger 10, causing condensation and liquefaction, achieving a second stage of dehumidification and purification. Simultaneously, wastewater is formed. Under gravity, the wastewater droplets flow through the bottom pipe connected to the bottom of condenser heat exchanger 10 into loading tank 15 for collection. The wastewater can be used for subsequent waste utilization, such as reuse in the boiler makeup water system. The dried flue gas, after double filtration and dehumidification, flows out of the flue gas outlet of condenser heat exchanger 10 and is discharged from exhaust pipe 14.

[0070] Once the wastewater in the loading tank 15 is full, valve 17 can be opened to discharge the wastewater through the drain pipe 16.

Claims

1. A boiler flue gas dehumidification device, characterized in that, The device includes: a purification tank (2), a delivery pipe (3), an extraction pipe (11), an air pump (12), a condenser heat exchanger (10), and a loading tank (15). One end of the conveying pipe (3) is connected to the air inlet at the bottom of the side wall of the purification barrel (2) so that the flue gas input by the conveying pipe (3) diffuses along the inner wall of the purification barrel (2) after entering the air inlet. The other end of the conveying pipe (3) is used to connect to the boiler body (1). The purification tank (2) is equipped with a double-layer dehumidifying filter screen, wherein the double-layer detachable dehumidifying filter screen includes a filter screen one (7) located on the outer layer and a filter screen two (8) located on the inner layer. The pore size of the filter screen one (7) is larger than the pore size of the filter screen two (8). The center of the double-layer dehumidifying filter screen is the flue gas outlet channel (18). The double-layer dehumidifying filter is provided with several circumferentially spaced mounting blocks (6) on its periphery, and the purification barrel (2) is provided with several circumferentially spaced mounting slots (5) inside. The mounting blocks (6) are detachably installed in the mounting slots (5) so that the double-layer dehumidifying filter can be detachably installed in the purification barrel (2). The flue gas outlet channel (18) of the purification tank (2) is connected to the flue gas inlet of the condensing heat exchanger (10) through the exhaust pipe (11). The flue gas channel inside the condensing heat exchanger (10) is connected to the loading tank (15) below through the bottom pipe below to collect the wastewater generated by the condensation of wet flue gas. The flue gas outlet of the condensing heat exchanger (10) is connected to the exhaust pipe (14) to discharge the dehumidified dry flue gas. The air pump (12) is installed on the air extraction pipe (11).

2. The boiler flue gas dehumidification device according to claim 1, characterized in that, The front end of the exhaust pipe (11) is located inside the purification tank (2). The front end of the exhaust pipe (11) has an elbow, which is located in the flue gas outlet channel (18) to discharge the flue gas in the flue gas outlet channel (18).

3. The boiler flue gas dehumidification device according to claim 1, characterized in that, The condenser heat exchanger (10) is a shell-and-tube heat exchanger, with the shell side being the flue gas passage and the tube side being the condensate passage.

4. The boiler flue gas dehumidification device according to claim 1, characterized in that, The exhaust pipe (14) is equipped with valve three (13).

5. The boiler flue gas dehumidification device according to claim 1, characterized in that, The loading tank (15) is equipped with a drain pipe (16) for discharging wastewater, and the drain pipe (16) is equipped with a valve (17).

6. The boiler flue gas dehumidification device according to claim 1, characterized in that, The center of the double-layer dehumidifying filter of the purification barrel (2) is the flue gas outlet pipe (19). The cavity of the flue gas outlet pipe forms a flue gas outlet channel (18). The four walls of the flue gas outlet pipe (19) have through holes (20) so that the flue gas diffused on the inner wall of the purification barrel (2) enters the flue gas outlet pipe (19) through the through holes (20) after passing through the double-layer dehumidifying filter. The top of the flue gas outlet pipe (19) is connected to the extraction pipe (11) to discharge flue gas.

7. The boiler flue gas dehumidification device according to claim 1, characterized in that, A valve (4) is installed on the delivery pipe (3).

8. The boiler flue gas dehumidification device according to claim 1, characterized in that, The purification tank (2) is provided with a lid (9) on top to seal the purification tank (2).

9. The boiler flue gas dehumidification device according to claim 1, characterized in that, The mounting block (6) is mounted on the filter screen support, which has a base frame for supporting the bottom of the double-layer dehumidifying filter screen. The double-layer dehumidifying filter screen is located in the space enclosed by the base frame and the mounting block (6).

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