A flue gas purification device for a gas-fired boiler

Abstract

The utility model relates to gas boiler environmental protection equipment technical field, concretely is a kind of gas boiler flue gas purification device, including the bag filter, multistage filtration subassembly and pipeline flue gas deodorization subassembly connected in turn, the stirring subassembly includes filter bag, filter housing and flue gas outlet, the inside installation of filter housing has filter bag, the side installation of filter housing has flue gas outlet, the outside of flue gas outlet is connected with multistage filtration subassembly by flange. The utility model discloses by setting bag filter, multistage filtration subassembly and pipeline flue gas deodorization subassembly in turn, realized multistage purification treatment to gas boiler flue gas. Bag filter can remove most dust in flue gas first, multistage filtration subassembly can further filter small dust and adsorb sulfide and nitrogen oxides, and pipeline flue gas deodorization subassembly can effectively remove peculiar smell in flue gas, to improve the purification effect of flue gas significantly.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology for gas-fired boilers, specifically to a flue gas purification device for gas-fired boilers. Background Technology

[0002] Gas-fired boilers generate large amounts of flue gas during operation, which contains harmful substances such as dust, sulfides, nitrogen oxides, and odorous gases. Directly releasing this flue gas into the atmosphere will not only severely pollute air quality but also harm human health and the ecological environment. Currently, most commercially available flue gas purification devices for gas-fired boilers only perform a single filtration function, such as using only bag filters to remove dust or simple adsorption devices to remove some odors. These devices suffer from poor purification efficiency and limited functionality, making it difficult to effectively remove multiple harmful substances from the flue gas simultaneously. Furthermore, some devices with multiple purification functions have complex connection structures between their purification components, resulting in high flow resistance of the flue gas within the device and consequently low purification efficiency. Therefore, this paper proposes a flue gas purification device for gas-fired boilers. Utility Model Content

[0003] In view of this, the present invention provides a flue gas purification device for gas-fired boilers, which aims to solve one of the technical problems of poor purification effect, single function, complex structure and inconvenient maintenance of existing flue gas purification devices for gas-fired boilers.

[0004] The technical solution of this utility model embodiment is implemented as follows: A gas boiler flue gas purification device includes a bag filter, a multi-stage filtration assembly and a pipeline flue gas deodorization assembly connected in sequence. The bag filter includes a filter bag, a filter housing and a flue gas outlet. The filter bag is installed inside the filter housing and a flue gas outlet is installed on one side of the filter housing. The multi-stage filtration assembly is connected to the outside of the flue gas outlet through a flange. The multi-stage filtration assembly includes a primary filter, a secondary filter, a tertiary filter, a first filter screen, a second filter screen, and a third filter screen. The first filter screen, the second filter screen, and the third filter screen are respectively connected to the inner walls of the primary filter, the secondary filter, and the tertiary filter by snap-fit. One end of the multi-stage filtration assembly is connected to a duct flue gas deodorization component.

[0005] A further preferred embodiment: the bag filter further includes a filter support frame and a dust outlet, wherein a filter housing is installed inside the top of the filter support frame, and a dust outlet for collecting smoke and dust is provided at the bottom of the filter housing.

[0006] Further preferred: the multi-stage filtration assembly further includes a first flue gas duct, a second flue gas duct, a third flue gas duct, an upper clamp, and a lower clamp. The flue gas inlet of the first-stage filter is connected to the bag filter through the first flue gas duct. The first-stage filter, the second-stage filter, and the third-stage filter are connected sequentially through the second flue gas duct and the third flue gas duct, and the duct connections are fixed by the upper clamp and the lower clamp, respectively.

[0007] A further preferred embodiment: the duct flue gas deodorization assembly includes a base, a blower, a deodorization duct, and a deodorizer; A blower is installed on the top of the base. One end of the blower is connected to a multi-stage filter assembly, and the other end of the blower is connected to one end of the deodorizer through a deodorization pipe.

[0008] A further preferred embodiment: the deodorizer is equipped with a removable activated carbon adsorption filter element, the activated carbon adsorption filter element having a thickness of 10-15cm, and the deodorization pipe is equipped with a flow regulating valve.

[0009] Further preferred embodiments: the first filter screen is a stainless steel wire mesh filter cylinder, the second filter screen is a ceramic filter cylinder, and the third filter screen is a molecular sieve filter cylinder.

[0010] A further preferred embodiment: the filter bag is made of polytetrafluoroethylene, and several filter bags are evenly distributed inside the filter housing.

[0011] The present invention has the following advantages due to the adoption of the above technical solution: 1. This utility model achieves multi-stage purification of flue gas from a gas-fired boiler by sequentially arranging a bag filter, a multi-stage filtration assembly, and a duct flue gas deodorization assembly. The bag filter removes most of the dust in the flue gas, the multi-stage filtration assembly further filters fine dust and adsorbs sulfides and nitrogen oxides, and the duct flue gas deodorization assembly effectively removes odors from the flue gas, thereby significantly improving the purification effect of the flue gas and solving the problems of poor purification effect and single function of existing devices. 2. This utility model reduces the flow resistance of flue gas inside the device through simple pipe connections, thereby improving purification efficiency. Meanwhile, inspection doors are provided on the bag filter, multi-stage filtration assembly, and duct flue gas deodorization assembly to facilitate future replacement and maintenance of the filter bags, filter layers, and activated carbon adsorption filter elements. 3. The present invention has a reasonable activated carbon adsorption layer thickness in the flue gas deodorization component and is equipped with a flow regulating valve to ensure the odor removal effect. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a front view of the present invention and a schematic diagram of the filter screen. Figure 3 This is a three-dimensional structural diagram of the multi-stage filtration assembly and filter screen of this utility model; Figure 4 This is a structural diagram of the duct flue gas deodorization component of this utility model; Figure 5 This is a structural diagram of the first filter screen of this utility model; Figure 6 This is a structural diagram of the second filter screen of this utility model; Figure 7 This is a structural diagram of the third filter screen of this utility model.

[0014] Figure label: 10. Bag filter; 100. Filter bag; 101. Filter housing; 102. Filter support frame; 103. Dust outlet; 104. Flue gas outlet; 20. Multi-stage filter assembly; 201. Primary filter; 202. Secondary filter; 203. Tertiary filter; 204. First flue gas duct; 205. Second flue gas duct; 206. Third flue gas duct; 207. Upper clamp; 208. Lower clamp; 2011. First filter screen; 2021. Second filter screen; 2031. Third filter screen; 30. Duct flue gas deodorization assembly; 301. Base; 302. Blower; 303. Deodorization duct; 304. Deodorizer; 3041. Activated carbon adsorption filter element. Detailed Implementation

[0015] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive. Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] Example 1 like Figures 1-7As shown, this utility model embodiment provides a flue gas purification device for a gas-fired boiler, including a bag filter 10, a multi-stage filtration assembly 20, and a duct flue gas deodorization assembly 30 connected in sequence. The bag filter 10 includes a filter bag 100, a filter housing 101, and a flue gas outlet 104. The filter bag 100 is installed inside the filter housing 101. The filter bag 100 is made of high-temperature resistant and corrosion-resistant polytetrafluoroethylene material. The flue gas outlet 104 is installed on one side of the filter housing 101. The multi-stage filtration assembly 20 is connected to the outside of the flue gas outlet 104 through a flange. The filter housing 101 is provided with an inspection door for easy replacement of the filter bag 100. The multi-stage filtration assembly 20 includes a primary filter 201, a secondary filter 202, a tertiary filter 203, a first filter screen 2011, a second filter screen 2021, and a third filter screen 2031. The first filter screen 2011, the second filter screen 2021, and the third filter screen 2031 are respectively connected to the inner walls of the primary filter 201, the secondary filter 202, and the tertiary filter 203 by snap-fit. One end of the multi-stage filtration assembly 20 is connected to a duct flue gas deodorization assembly 30.

[0017] Specifically, in this embodiment: the bag filter 10 further includes a filter support frame 102 and a dust outlet 103. The filter support frame 102 has a filter housing 101 installed inside its top. The bottom of the filter housing 101 is provided with a dust outlet 103 for collecting smoke and dust. The bag filter 10 is equipped with a pulse cleaning device. When the internal pressure value of the bag filter 10 reaches a set threshold, the system automatically starts the pulse cleaning device. The compressed air is shot towards the filter bag 100 through the nozzle of the blowpipe. The filter bag expands and vibrates, causing the dust on its surface to fall into the ash hopper below and then be discharged through the dust outlet 103.

[0018] Specifically, in this embodiment, the multi-stage filtration assembly 20 further includes a first flue gas duct 204, a second flue gas duct 205, a third flue gas duct 206, an upper clamp 207, and a lower clamp 208. The flue gas inlet of the first-stage filter 201 is connected to the bag filter 10 through the first flue gas duct 204. The first-stage filter 201, the second-stage filter 202, and the third-stage filter 203 are sequentially connected through the second flue gas duct 205 and the third flue gas duct, and the duct connections are fixed by the upper clamp 207 and the lower clamp 208, respectively. The first filter screen 2011 is a stainless steel wire mesh filter cylinder used to remove larger particles of impurities in the flue gas. The second filter screen 2021 is a ceramic filter cylinder used to further filter fine dust in the flue gas. The third filter screen 2031 is a molecular sieve filter cylinder used to adsorb sulfides and nitrogen oxides in the flue gas. The tops of the first-stage filter 201, the second-stage filter 202, and the third-stage filter 203 are all provided with removable covers for easy replacement of the filter screens.

[0019] Specifically, in this embodiment: the duct flue gas deodorization assembly 30 includes a base 301, a blower 302, a deodorization duct 303, and a deodorizer 304; A blower 302 is installed on the top of the base 301. One end of the blower 302 is connected to the multi-stage filter assembly 20, and the other end of the blower 302 is connected to one end of the deodorizer 304 through the deodorization pipe 303.

[0020] The deodorizer 304 is equipped with a removable activated carbon adsorption filter element 3041. The thickness of the activated carbon adsorption filter element 3041 is 10-15cm, preferably 12cm in this embodiment. The activated carbon adsorption filter element 3041 can filter out harmful substances and odors in the flue gas. The deodorization pipe 303 is equipped with a flow regulating valve to regulate the flow rate of the flue gas in the deodorization pipe 303.

[0021] Specifically in this embodiment: the filter bag 100 is made of polytetrafluoroethylene, and several filter bags 100 are evenly distributed inside the filter housing 101.

[0022] Example 2 The difference from Embodiment 1 is that a gas boiler flue gas purification device includes a multi-stage filtration assembly 20, which includes a primary filter 201, a secondary filter 202, and a tertiary filter 203. Temperature sensors and pressure sensors are installed inside the primary filter 201, the secondary filter 202, and the tertiary filter 203. A display screen electrically connected to the temperature and pressure sensors is provided on the outside of the primary filter 201, the secondary filter 202, and the tertiary filter 203 for real-time display of temperature and pressure data inside the filter box.

[0023] Working principle: The flue gas generated by the gas-fired boiler first passes through the flue gas inlet filter housing 101 of the bag filter 10, where most of the dust in the flue gas is filtered out by the filter bag 100. The filtered flue gas then enters the multi-stage filtration assembly 20 through the flue gas outlet 104 and the first flue gas duct 204, passing sequentially through the first filter 201, the second filter 202, and the third filter 2031 of the first-stage filter 201, the second filter 202, and the third filter 203, respectively, to further remove fine dust and adsorb sulfides and nitrogen oxides. Then, the flue gas enters the blower 302 of the duct flue gas deodorization assembly 30 through the outlet of the multi-stage filtration assembly 20, and then enters the deodorizer 304 through the deodorization duct 303. The flow rate is controlled by adjusting the flow regulating valve to ensure that the flue gas fully contacts the activated carbon adsorption filter element 3041, removing odors from the flue gas. Finally, the purified flue gas is discharged into the atmosphere. During the operation of the device, the operator can monitor the temperature and pressure inside the multi-stage filtration assembly 20 in real time through the display screen.

[0024] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A flue gas purification device for a gas-fired boiler, comprising a bag filter (10), a multi-stage filtration assembly (20), and a duct flue gas deodorization assembly (30) connected in sequence, characterized in that: The bag filter (10) includes a filter bag (100), a filter housing (101) and a flue gas outlet (104). The filter bag (100) is installed inside the filter housing (101), and the flue gas outlet (104) is installed on one side of the filter housing (101). The flue gas outlet (104) is connected to a multi-stage filtration assembly (20) via a flange. The multi-stage filtration assembly (20) includes a primary filter (201), a secondary filter (202), a tertiary filter (203), a first filter screen (2011), a second filter screen (2021), and a third filter screen (2031). The first filter screen (2011), the second filter screen (2021), and the third filter screen (2031) are respectively connected to the inner walls of the primary filter (201), the secondary filter (202), and the tertiary filter (203) by snap-fit. One end of the multi-stage filtration assembly (20) is connected to a duct flue gas deodorization assembly (30).

2. The flue gas purification device for a gas-fired boiler according to claim 1, characterized in that: The bag filter (10) also includes a filter support frame (102) and a dust outlet (103). The filter support frame (102) has a filter housing (101) installed inside the top of the filter housing (102), and the bottom of the filter housing (101) has a dust outlet (103) for collecting smoke and dust.

3. The flue gas purification device for a gas-fired boiler according to claim 1, characterized in that: The multi-stage filtration assembly (20) also includes a first flue gas duct (204), a second flue gas duct (205), a third flue gas duct (206), an upper clamp (207), and a lower clamp (208). The flue gas inlet of the first-stage filter (201) is connected to the bag filter (10) through the first flue gas duct (204). The first-stage filter (201), the second-stage filter (202), and the third-stage filter (203) are connected sequentially through the second flue gas duct (205) and the third flue gas duct (206), and the duct connections are fixed by the upper clamp (207) and the lower clamp (208), respectively.

4. The flue gas purification device for a gas-fired boiler according to claim 1, characterized in that: The duct flue gas deodorization assembly (30) includes a base (301), a blower (302), a deodorization duct (303), and a deodorizer (304). A blower (302) is installed on the top of the base (301). One end of the blower (302) is connected to the multi-stage filter assembly (20), and the other end of the blower (302) is connected to one end of the deodorizer (304) through the deodorizing pipe (303).

5. The flue gas purification device for a gas-fired boiler according to claim 4, characterized in that: The deodorizer (304) is equipped with a removable activated carbon adsorption filter (3041) inside. The activated carbon adsorption filter (3041) has a thickness of 10-15cm. The deodorizing pipe (303) is equipped with a flow regulating valve.

6. The flue gas purification device for a gas-fired boiler according to claim 1, characterized in that: The first filter screen (2011) is a stainless steel wire mesh filter cylinder, the second filter screen (2021) is a ceramic filter cylinder, and the third filter screen (2031) is a molecular sieve filter cylinder.

7. The flue gas purification device for a gas-fired boiler according to claim 1, characterized in that: The filter bag (100) is made of polytetrafluoroethylene, and several filter bags (100) are evenly distributed inside the filter housing (101).

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