Pre-filtering boiler waste gas treatment equipment

Abstract

The invention provides pre-filtering boiler waste gas treatment equipment which comprises a spraying tower and a filtering device, the filtering device comprises a box body, an elastic filtering plate and a collecting tank, the box body is provided with a gas inlet and a gas outlet, and the elastic filtering plate is detachably and fixedly connected to the position, close to the gas inlet of the box body, in the box body so as to filter dust carried in waste gas; and the collecting tank is fixedly connected to the bottom in the box body so as to collect dust shaken off by the elastic filter plate. The filtering device is arranged in front of the spray tower, so that dust and other solid impurities in waste gas are filtered out in advance, water drainage of the spray tower is smoother, the water tank of the spray tower does not need to be provided with the filtering device, and the blocking condition and the water pump failure during water circulation or water drainage are avoided. The filter plate is more convenient to clean, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a pre-filter boiler waste gas treatment device. Background Technology

[0002] Boiler exhaust gas is treated by a spray tower before being discharged. A spray tower is a commonly used exhaust gas treatment and purification device, primarily using liquid spraying to absorb and wash away harmful pollutants such as acid mist, dust, and organic gases in the exhaust gas. Its structure typically includes a packing layer, a spray system, and a collection device. During the spraying process, the liquid comes into full contact with the gas, achieving pollutant removal.

[0003] Normally, the exhaust gas is not pre-filtered to remove dust. Instead, a filter device for solid-liquid separation is installed in the drain pipe of the spray tower. This can easily lead to poor drainage. The filter device needs to be inspected regularly to clean the impurities attached to the filter screen or replace it with a new one. Moreover, cleaning solid impurities after being soaked in liquid is more difficult and affects work efficiency. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a pre-filter boiler exhaust gas treatment device that filters out solid impurities such as dust from the exhaust gas, making filter cleaning easier, ensuring smoother drainage from the spray tower, and improving work efficiency.

[0005] This invention provides a pre-filtration boiler exhaust gas treatment device, comprising: a spray tower and a filtration device. The spray tower has a spray chamber and an air inlet, an exhaust outlet, a water inlet, and a drain outlet connected to the spray chamber. The air inlet of the spray tower is located on the side wall of the spray tower and near the bottom. The air inlet of the spray tower is connected to a first air inlet pipe. The exhaust outlet of the spray tower is located at the top of the spray tower. A spray pipe is provided inside the spray chamber and is connected to the water inlet of the spray tower. The drain outlet of the spray tower is located at the bottom of the spray tower. Both the water inlet and the drain outlet of the spray tower are connected to a water tank.

[0006] The filtration device includes a housing, an elastic filter plate, and a collection tank. The housing has an air inlet and an air outlet. The air inlet of the housing is connected to a second air inlet pipe, and the air outlet of the housing is connected to a first air inlet pipe. The elastic filter plate is detachably and fixedly connected to the housing near the air inlet to filter dust carried in the exhaust gas. The collection tank is fixedly connected to the bottom of the housing to collect the dust shaken off by the elastic filter plate.

[0007] In some embodiments, the housing has an air inlet and an exhaust outlet, the elastic filter plate includes a filter plate and a tension spring, the filter plate is detachably and fixedly connected to the housing, the filter plate covers the air inlet of the housing, one end of the tension spring is detachably and fixedly connected to the filter plate, and the other end of the tension spring is detachably and fixedly connected to the inner wall of the housing located on one side of the air inlet.

[0008] In some embodiments, a plurality of tension springs are provided and arranged around the air inlet of the housing.

[0009] In some embodiments, the pre-filter boiler exhaust gas treatment equipment further includes a frame, which is fixedly connected to the inside of the housing and covers the air inlet of the housing. The filter plate is detachably and fixedly connected to the frame to form a filter chamber, and the lower end of the frame is fixedly connected to the upper end face of the collection tank.

[0010] In some embodiments, the frame includes a top plate and two side plates. The top plate is fixedly connected above the air inlet of the housing. The two side plates are fixedly connected to the two sides of the air inlet of the housing, respectively. The two side plates are fixedly connected to the two sides below the top plate. The upper end of the filter plate is detachably fixedly connected to the top plate. The two sides of the filter plate are detachably fixedly connected to the two side plates. The lower end of the filter plate is detachably fixedly connected to the upper surface of the collection tank.

[0011] In some embodiments, the filter plate includes a frame and a filter screen. The frame is made of rubber, the filter screen is fixedly connected inside the frame, and the frame and tension spring are detachably and fixedly connected to the frame.

[0012] In some embodiments, the pre-filter boiler exhaust gas treatment equipment further includes a pull-out box, which is fixedly connected to the bottom of the housing, and a collection trough is fixedly connected to the top of the pull-out box. The bottom of the collection trough is an ash discharge port, and the collection trough is connected to the pull-out box through the ash discharge port.

[0013] In some embodiments, the two ends of the tension spring are detachably fixed to the frame and the box body by bolts, and the edges of the frame are detachably fixed to the top plate, the side plate and the collection trough by bolts.

[0014] In some embodiments, an induced draft fan is connected to the first air intake pipe.

[0015] In some embodiments, a check valve is connected to the first intake pipe to prevent exhaust gas from flowing back. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings.

[0017] in:

[0018] Figure 1 This is a schematic diagram of the pre-filter boiler exhaust gas treatment equipment according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the internal structure of the filtration device in the image;

[0020] Figure label:

[0021] 1. Spray tower; 2. Exhaust fan; 3. First air inlet pipe; 4. Filter device; 5. Second air inlet pipe; 6. Water tank;

[0022] 401. Housing; 402. Filter plate; 403. Frame; 404. Tension spring; 405. Collection tank; 406. Pull-out box. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The boiler exhaust gas treatment device with pre-filtration according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0025] like Figure 1-2 As shown, this embodiment of the invention proposes a pre-filtration boiler exhaust gas treatment device, including: a spray tower 1 and a filter device 4. The spray tower 1 has a spray chamber and an air inlet, an exhaust outlet, a water inlet and a drain outlet connected to the spray chamber. The air inlet of the spray tower 1 is located on the side wall of the spray tower 1 and near the bottom. The air inlet of the spray tower 1 is connected to a first air inlet pipe 3. The exhaust outlet of the spray tower 1 is located at the top of the spray tower 1. A spray pipe is provided in the spray chamber and is connected to the water inlet of the spray tower 1. The drain outlet of the spray tower 1 is located at the bottom of the spray tower 1. Both the water inlet and the drain outlet of the spray tower 1 are connected to a water tank 6.

[0026] The filter device 4 includes a housing 401, an elastic filter plate 402, and a collection tank 405. The housing 401 has an air inlet and an air outlet. The air inlet of the housing 401 is connected to a second air inlet pipe 5, and the air outlet of the housing 401 is connected to a first air inlet pipe 3. The elastic filter plate 402 is detachably and fixedly connected inside the housing 401 near the air inlet of the housing 401 to filter dust carried in the exhaust gas. The collection tank 405 is fixedly connected to the bottom inside the housing 401 to collect the dust shaken off by the elastic filter plate 402.

[0027] This embodiment of the invention, by installing a filter device 4 before the spray tower 1, filters out solid impurities such as dust in the exhaust gas, making the drainage of the spray tower 1 smoother. Furthermore, the water tank 6 of the spray tower 1 does not require the filter device 4, thus avoiding blockages and pump malfunctions during water circulation or drainage. Cleaning the filter plates is also more convenient, improving work efficiency.

[0028] In some embodiments, the housing 401 has an air inlet and an exhaust outlet, and the elastic filter plate 402 includes a filter plate 402 and a tension spring 404. The filter plate 402 is detachably and fixedly connected to the housing 401 and covers the air inlet of the housing 401. One end of the tension spring 404 is detachably and fixedly connected to the filter plate 402, and the other end of the tension spring 404 is detachably and fixedly connected to the inner wall of the housing 401 located on the side of the air inlet.

[0029] When in use, exhaust gas enters the housing 401, and the center of the elastic filter plate 402 expands towards the exhaust port. The tension spring 404 also stretches accordingly. Dust and other impurities in the exhaust gas are intercepted by the elastic filter. When the exhaust gas is stopped, the restoring force of the tension spring 404 pulls the elastic filter plate 402 back and causes it to vibrate back and forth, causing the dust and other impurities adsorbed on the elastic filter to fall into the collection tank 405, thus completing the cleaning of the elastic filter.

[0030] In some embodiments, tension springs 404 are provided in a plurality of manner and arranged around the air inlets of housing 401.

[0031] In some embodiments, the pre-filter boiler exhaust gas treatment equipment further includes a frame 403, which is fixedly connected to the inside of the housing 401 and covers the air inlet of the housing 401. A filter plate 402 is detachably and fixedly connected to the frame 403 to form a filter chamber, and the lower end of the frame 403 is fixedly connected to the upper end face of the collection tank 405. By providing the frame 403, the filter plate 402 can be easily installed.

[0032] In some embodiments, the frame 403 includes a top plate and two side plates. The top plate is fixedly connected above the air inlet of the housing 401. The two side plates are fixedly connected to the two sides of the air inlet of the housing 401 respectively. The two side plates are fixedly connected to the two sides below the top plate. The upper end of the filter plate 402 is detachably fixedly connected to the top plate. The two sides of the filter plate 402 are detachably fixedly connected to the two side plates. The lower end of the filter plate 402 is detachably fixedly connected to the upper surface of the collection tank 405.

[0033] In some embodiments, the filter plate 402 includes a frame and a filter screen. The frame is made of rubber, and the filter screen is fixedly connected inside the frame. The frame 403 and the tension spring 404 are detachably and fixedly connected to the frame. By selecting an elastic material such as rubber for the frame, the filter plate 402 can expand and contract as well as reciprocate shaking, which facilitates the shaking off of dust adhering to the filter plate 402.

[0034] In some embodiments, the pre-filter boiler exhaust gas treatment equipment further includes a pull-out box 406, which is fixedly connected to the bottom of the housing 401. A collection trough 405 is fixedly connected to the top of the pull-out box 406, and the bottom of the collection trough 405 is an ash discharge port. The collection trough 405 is connected to the pull-out box 406 through the ash discharge port.

[0035] When the collection tank 405 is too full of dust and other impurities, the pull-out box 406 can receive the impurities in the collection tank 405 and clean them by pulling them out, so as to avoid the air inlet being blocked due to the collection tank 405 being too full of impurities.

[0036] In some embodiments, the two ends of the tension spring 404 are detachably and fixedly connected to the frame and the box 401 by bolts, respectively, and the edges of the frame are detachably and fixedly connected to the top plate, the side plate and the collection groove 405 by bolts.

[0037] In some embodiments, an induced draft fan 2 is connected to the first air inlet pipe 3 to introduce exhaust gas into the spray tower 1.

[0038] In some embodiments, a check valve is connected to the first intake pipe 3 to prevent exhaust gas from flowing back.

[0039] In the description of this invention, 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," "axial," "radial," and "circumferential" 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 invention and simplifying the description, and are not intended to 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 invention.

[0040] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pre-filter boiler exhaust gas treatment device, characterized in that, include: A spray tower, comprising a spray chamber and an air inlet, an exhaust outlet, a water inlet, and a drain outlet connected to the spray chamber. The air inlet is located on the side wall of the spray tower and near the bottom, and is connected to a first air inlet pipe. The exhaust outlet is located at the top of the spray tower. A spray pipe is provided inside the spray chamber and is connected to the water inlet of the spray tower. The drain outlet is located at the bottom of the spray tower. Both the water inlet and the drain outlet are connected to a water tank. A filtration device includes a housing, an elastic filter plate, and a collection tank. The housing has an air inlet and an air outlet. The air inlet of the housing is connected to a second air inlet pipe, and the air outlet of the housing is connected to a first air inlet pipe. The elastic filter plate is detachably and fixedly connected to the housing near the air inlet to filter dust carried in the exhaust gas. The collection tank is fixedly connected to the bottom of the housing to collect the dust shaken off by the elastic filter plate.

2. The boiler exhaust gas treatment equipment with pre-filtration according to claim 1, characterized in that, The housing has an air inlet and an exhaust outlet. The elastic filter plate includes a filter plate and a tension spring. The filter plate is detachably and fixedly connected to the housing and covers the air inlet of the housing. One end of the tension spring is detachably and fixedly connected to the filter plate, and the other end of the tension spring is detachably and fixedly connected to the inner wall of the housing located on the side of the air inlet.

3. The boiler exhaust gas treatment equipment with pre-filtration according to claim 2, characterized in that, The tension springs are provided in several portions and arranged around the air inlet of the housing.

4. The boiler exhaust gas treatment equipment with pre-filtration according to claim 2, characterized in that, It also includes a frame, which is fixedly connected to the inside of the box and covers the air inlet of the box. The filter plate is detachably and fixedly connected to the frame to form a filter chamber. The lower end of the frame is fixedly connected to the upper end face of the collection tank.

5. The boiler exhaust gas treatment equipment with pre-filtration according to claim 4, characterized in that, The frame includes a top plate and two side plates. The top plate is fixedly connected above the air inlet of the housing. The two side plates are fixedly connected to both sides of the air inlet of the housing, and the two side plates are fixedly connected to the two sides below the top plate. The upper end of the filter plate is detachably fixedly connected to the top plate. The two sides of the filter plate are detachably fixedly connected to the two side plates. The lower end of the filter plate is detachably fixedly connected to the upper surface of the collection tank.

6. The boiler exhaust gas treatment equipment with pre-filtration according to claim 5, characterized in that, The filter plate includes a frame and a filter screen. The frame is made of rubber, and the filter screen is fixedly connected inside the frame. The frame and the tension spring are detachably and fixedly connected to the frame.

7. The boiler exhaust gas treatment equipment with pre-filtration according to claim 1, characterized in that, It also includes a pull-out box, which is fixedly connected to the bottom of the box body, and a collection trough is fixedly connected to the top of the pull-out box. The bottom of the collection trough is a dust outlet, and the collection trough is connected to the pull-out box through the dust outlet.

8. The boiler exhaust gas treatment equipment with pre-filtration according to claim 6, characterized in that, The two ends of the tension spring are detachably and fixedly connected to the frame and the box body by bolts, respectively. The edges of the frame are detachably and fixedly connected to the top plate, the side plate and the collection trough by bolts.

9. The boiler exhaust gas treatment equipment with pre-filtration according to claim 1, characterized in that, An induced draft fan is connected to the first air intake pipe.

10. The boiler exhaust gas treatment equipment with pre-filtration according to claim 1, characterized in that, A check valve is connected to the first intake pipe to prevent exhaust gas from flowing back.

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