Natural gas boiler waste heat recovery device

Abstract

The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery device of a natural gas boiler, which is convenient to filter, improves the working efficiency and enhances the practicability. Comprising a treatment box, a filtering mechanism comprises a filtering box, a treatment cavity is formed in the treatment box, a water supply pipe is arranged in the treatment cavity, an air outlet hole is formed in one end of the treatment cavity, the filtering box is fixedly installed at the other end of the treatment box, a filtering cavity is formed in the filtering box and communicates with the treatment cavity, and a liquid inlet hole is formed in the top end of the filtering cavity; one end of the filter cavity is communicated with a drain pipe, the drain pipe is provided with a switch, the filter box is provided with an air inlet pipe, a partition plate is fixedly installed in the filter cavity, two first through holes are formed in the top end of the filter cavity, sliding plates are slidably installed in the two first through holes, and two clamping grooves are formed in the bottom end of the filter cavity; and the two sliding plates are clamped with the two clamping grooves correspondingly, and a filter screen and an activated carbon layer are arranged on the two sliding plates correspondingly.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery device for a natural gas boiler. Background Art

[0002] A natural gas steam boiler is a type of gas steam boiler. A natural gas steam boiler uses natural gas as fuel. The heat released by burning in the furnace heats the water in the pot and vaporizes it into steam. A large amount of high-temperature flue gas will be generated after the fuel inside the natural gas boiler is burned. These high-temperature flue gases often take away 20%-50% of the heat of combustion inside the furnace. Directly discharging them outdoors will waste this heat, greatly reducing the efficiency of fuel utilization. Therefore, a waste heat recovery device needs to be set up to fully utilize the waste heat of the flue gas and prevent the waste caused by the loss of this heat.

[0003] For example, a utility model patent with Chinese patent publication number CN211425183U discloses a waste heat recovery device for a gas boiler, including a shell, a first opening and a third opening are provided on the shell, a gas outlet and a gas inlet are respectively installed at the first opening and the third opening of the shell, and the gas outlet can be effectively ventilated and depressurized to ensure the stability of the operation of the device, the gas outlet is located on the upper side of the gas inlet, the shell is a heat-insulating material, an inner cylinder for holding water is installed at the bottom end of the shell, and a connecting rod is fixedly connected to the upper end of the inner cylinder;

[0004] It was found during use of the above-mentioned prior art that the device sends the high-temperature flue gas generated by the boiler into the outer shell through the gas inlet, the heat contacts the baffle and transfers the heat to the water placed in the inner cylinder through the mounting plate and the connecting rod, thereby heating the water in the inner cylinder and effectively utilizing the waste heat of the gas boiler. However, the high-temperature flue gas may contain dust and impurities, which may pollute the water in the inner cylinder, and is directly discharged into the atmosphere without corresponding purification treatment, which may pollute the environment and reduce working efficiency, resulting in poor practicality. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In order to solve the above technical problems, the utility model provides a natural gas boiler waste heat recovery device which is easy to filter, improves working efficiency and enhances practicality.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a natural gas boiler waste heat recovery device, comprising a treatment box, the filtering mechanism comprising a filter box, a treatment chamber is arranged in the treatment box, a water supply pipe is arranged in the treatment chamber, an air outlet is arranged at one end of the treatment chamber, the filter box is fixedly installed at the other end of the treatment box, a filter chamber is arranged in the filter box, the filter chamber is connected with the treatment chamber, a liquid inlet hole is arranged at the top of the filter chamber, a box cover is sealed on the liquid inlet hole, a drain pipe is connected and installed at one end of the filter chamber, a switch is arranged on the drain pipe, an air inlet pipe is arranged on the filter box, a partition is fixedly installed in the filter chamber, two first through holes are arranged at the top of the filter chamber, slides are slidably installed in the two first through holes, two card slots are arranged at the bottom of the filter chamber, the two slides are respectively clamped in the two card slots, and a filter screen and an activated carbon layer are respectively arranged on the two slides.

[0009] By adopting the above technical scheme, the box cover is opened, lime slurry is injected into the filter box, the air inlet pipe is connected to the natural gas boiler, the flue gas generated by the boiler enters the filter box through the air inlet pipe, the lime slurry desulfurizes the flue gas, the desulfurized flue gas passes through the filter, the filter intercepts impurities in the flue gas, the intercepted flue gas passes through the activated carbon layer, the activated carbon layer absorbs odor in the flue gas, the purified flue gas enters the treatment box, cold water is injected from one end of the water supply pipe, the heat of the flue gas is the temperature rise of the water in the water supply pipe, the used flue gas is finally discharged through the air outlet, this process realizes a process that is easy to filter, improves work efficiency, and thus enhances practicality.

[0010] Preferably, a plurality of heat conducting plates are provided on the water supply pipe.

[0011] By adopting the above technical solution, the heat conducting plate can better transfer the heat in the flue gas to the water supply pipe, thereby enhancing practicality.

[0012] Preferably, sealing grooves are provided on the two first through holes, and sealing gaskets are provided in the two sealing grooves.

[0013] By adopting the above technical solution, the sealing gasket can enhance the sealing performance between the slide plate and the first through hole.

[0014] Preferably, two observation windows are connected and installed on the filter box.

[0015] By adopting the above technical solution, the working conditions in the filter box can be observed at any time through the observation window, thereby enhancing practicality.

[0016] Preferably, a guide block is provided in the filter box.

[0017] By adopting the above technical solution, the guide block can assist in better discharge of the used lime slurry, thereby enhancing practicality.

[0018] Preferably, a plurality of casters are evenly and fixedly mounted on the bottom end of the processing box.

[0019] By adopting the above technical solution, the device can be moved to a required place, thereby reducing usage limitations.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present application provides a natural gas boiler waste heat recovery device, which has the following beneficial effects:

[0022] Open the box cover, inject lime slurry into the filter box, connect the air inlet pipe to the natural gas boiler, and the flue gas generated by the boiler enters the filter box through the air inlet pipe. The lime slurry desulfurizes the flue gas. The desulfurized flue gas passes through the filter net, which intercepts impurities in the flue gas. The intercepted flue gas passes through the activated carbon layer, which absorbs odors in the flue gas. The purified flue gas enters the treatment box, and cold water is injected from one end of the water supply pipe. The heat of the flue gas is the temperature rise of the water in the water supply pipe. The used flue gas is finally discharged through the air outlet. This process realizes the process of facilitating filtration, improves work efficiency, and thus enhances practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the shaft side structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the axial side cross-sectional structure of the utility model;

[0025] Figure 3 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0026] Figure 4 The utility model Figure 2 Schematic diagram of the enlarged structure of A.

[0027] Markings in the attached figure: 1. treatment box; 2. filter box; 3. water supply pipe; 4. box cover; 5. drain pipe; 6. switch; 7. air intake pipe; 8. partition; 9. slide plate; 10. filter net; 11. activated carbon layer; 12. heat conductive sheet; 13. sealing gasket; 14. observation window; 15. guide block; 16. caster. DETAILED DESCRIPTION Embodiment 1

[0028] See also Figure 1-Figure 4A waste heat recovery device for a natural gas boiler includes a processing box 1. A plurality of casters 16 are evenly fixedly installed at the bottom of the processing box 1 so that the device can be moved to a desired place. A filtering mechanism includes a filtering box 2. A processing chamber is arranged in the processing box 1. A water supply pipe 3 is arranged in the processing chamber. A plurality of heat conducting plates 12 are arranged on the water supply pipe 3. The heat conducting plates 12 can better transfer the heat in the flue gas to the water supply pipe 3. An air outlet is opened at one end of the processing chamber. The filtering box 2 is fixedly installed at the other end of the processing box 1. A filtering chamber is arranged in the filtering box 2. The chamber is connected with the processing chamber, a liquid inlet hole is provided at the top of the filter chamber, a box cover 4 is sealed and installed on the liquid inlet hole, a drain pipe 5 is connected and installed at one end of the filter chamber, a switch 6 is provided on the drain pipe 5, an air inlet pipe 7 is provided on the filter box 2, a partition plate 8 is fixedly installed in the filter chamber, two first through holes are provided at the top of the filter chamber, a slide plate 9 is slidably installed in the two first through holes, a sealing groove is provided on the two first through holes, and a sealing gasket 13 is provided in the two sealing grooves, and the sealing gasket 13 can enhance the sealing between the slide plate 9 and the first through hole, and the filter Two card slots are provided at the bottom of the cavity, and two slide plates 9 are respectively mounted in the two card slots. A filter screen 10 and an activated carbon layer 11 are respectively provided on the two slide plates 9. Two observation windows 14 are connected and installed on the filter box 2. Through the observation windows 14, the working conditions in the filter box 2 can be observed at any time. A guide block 15 is provided in the filter box 2. The guide block 15 can assist in better discharge of the lime slurry after use. The box cover 4 is opened, and the lime slurry is injected into the filter box 2. The air inlet pipe 7 is connected to the natural gas boiler, and the flue gas generated by the boiler passes through the air inlet pipe 7. Entering into the filter box 2, the lime slurry desulfurizes the flue gas, the desulfurized flue gas passes through the filter 10, the filter 10 intercepts impurities in the flue gas, the intercepted flue gas passes through the activated carbon layer 11, the activated carbon layer 11 absorbs the odor in the flue gas, the purified flue gas enters the treatment box 1, and cold water is injected from one end of the water supply pipe 3. The heat of the flue gas is the temperature rise of the water in the water supply pipe 3, and the used flue gas is finally discharged through the air outlet. This process realizes a process that is easy to filter, improves work efficiency, and thus enhances practicality. Embodiment 2

[0029] See also Figure 1-Figure 4A waste heat recovery device for a natural gas boiler comprises a treatment box 1, a filtering mechanism comprises a filtering box 2, a treatment chamber is arranged in the treatment box 1, a water supply pipe 3 is arranged in the treatment chamber, an air outlet is arranged at one end of the treatment chamber, the filtering box 2 is fixedly installed at the other end of the treatment box 1, a filtering chamber is arranged in the filtering box 2, the filtering chamber is communicated with the treatment chamber, a liquid inlet hole is arranged at the top of the filtering chamber, a box cover 4 is sealed and installed on the liquid inlet hole, a drain pipe 5 is connected and installed at one end of the filtering chamber, a switch 6 is arranged on the drain pipe 5, an air inlet pipe 7 is arranged on the filtering box 2, a partition 8 is fixedly installed in the filtering chamber, two first through holes are arranged at the top of the filtering chamber, slide plates 9 are slidably installed in the two first through holes, two card slots are arranged at the bottom of the filtering chamber, and the two slide plates 9 are respectively card-mounted with the two card slots , a filter screen 10 and an activated carbon layer 11 are respectively provided on the two slide plates 9, the box cover 4 is opened, lime slurry is injected into the filter box 2, the air inlet pipe 7 is connected to the natural gas boiler, the flue gas generated by the boiler enters the filter box 2 through the air inlet pipe 7, the lime slurry desulfurizes the flue gas, the desulfurized flue gas passes through the filter screen 10, the filter screen 10 intercepts impurities in the flue gas, the intercepted flue gas passes through the activated carbon layer 11, the activated carbon layer 11 absorbs the odor in the flue gas, the purified flue gas enters the treatment box 1, cold water is injected from one end of the water supply pipe 3, the heat of the flue gas is the temperature rise of the water in the water supply pipe 3, the used flue gas is finally discharged through the air outlet, this process realizes the process of facilitating filtering, improves work efficiency, and thus enhances practicality.

[0030] See also Figure 2 and Figure 3 A plurality of heat conducting plates 12 are arranged on the water delivery pipe 3, and the heat conducting plates 12 can better transfer the heat in the flue gas to the water delivery pipe 3, thereby enhancing the practicality.

[0031] See also Figure 2-Figure 4 The two first through holes are both provided with sealing grooves, and the two sealing grooves are both provided with sealing gaskets 13, and the sealing gaskets 13 can enhance the sealing between the slide plate 9 and the first through holes.

[0032] See also Figure 2 Two observation windows 14 are connected and installed on the filter box 2. The working conditions in the filter box 2 can be observed at any time through the observation windows 14, thereby enhancing practicality.

[0033] See also Figure 2 and Figure 3 A guide block 15 is provided in the filter box 2, and the guide block 15 can assist in better discharge of the used lime slurry, thereby enhancing practicality.

[0034] See also Figure 1 and Figure 3 A plurality of casters 16 are evenly and fixedly mounted on the bottom of the processing box 1, so that the device can be moved to a desired place, thereby reducing usage limitations.

[0035] The utility model discloses a waste heat recovery device for a natural gas boiler. When the device is working, the box cover 4 is opened, lime slurry is injected into the filter box 2, the air inlet pipe 7 is connected to the natural gas boiler, the flue gas generated by the boiler enters the filter box 2 through the air inlet pipe 7, the lime slurry desulfurizes the flue gas, the desulfurized flue gas passes through the filter screen 10, the filter screen 10 intercepts impurities in the flue gas, the intercepted flue gas passes through the activated carbon layer 11, the activated carbon layer 11 absorbs odor in the flue gas, the purified flue gas enters the treatment box 1, cold water is injected from one end of the water supply pipe 3, the heat of the flue gas is the temperature rise of the water in the water supply pipe 3, the used flue gas is finally discharged through the air outlet, and this process realizes a process that is easy to filter.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat recovery device for a natural gas boiler, comprising a treatment box (1), characterized in that , also includes: A filtering mechanism, the filtering mechanism comprising a filtering box (2), a processing chamber provided in the processing box (1), a water supply pipe (3) provided in the processing chamber, an air outlet hole provided at one end of the processing chamber, a filtering box (2) fixedly mounted at the other end of the processing box (1), a filtering chamber provided in the filtering box (2), the filtering chamber being connected to the processing chamber, a liquid inlet hole provided at the top end of the filtering chamber, a box cover (4) being sealed and mounted on the liquid inlet hole, a drainage pipe (5) being connected and mounted at one end of the filtering chamber, a switch (6) being mounted on the drainage pipe (5), an air inlet pipe (7) being provided on the filtering box (2), a partition plate (8) being fixedly mounted in the filtering chamber, two first through holes being provided at the top end of the filtering chamber, a slide plate (9) being slidably mounted in each of the two first through holes, two card slots being provided at the bottom end of the filtering chamber, two slide plates (9) being respectively mounted in the two card slots, and a filter screen (10) and an activated carbon layer (11) being respectively mounted on the two slide plates (9).

2. A natural gas boiler waste heat recovery device as claimed in claim 1, characterized in that: A plurality of heat conducting plates (12) are provided on the water supply pipe (3).

3. A natural gas boiler waste heat recovery device as claimed in claim 2, characterized in that: The two first through holes are each provided with a sealing groove, and a sealing gasket (13) is provided in each of the two sealing grooves.

4. A waste heat recovery device for a natural gas boiler as claimed in claim 3, characterized in that: Two observation windows (14) are connected and installed on the filter box (2).

5. A waste heat recovery device for a natural gas boiler as claimed in claim 4, characterized in that: A guide block (15) is provided in the filter box (2).

6. A natural gas boiler waste heat recovery device as claimed in claim 5, characterized in that: A plurality of casters (16) are evenly and fixedly mounted on the bottom end of the processing box (1).

Images