Flue gas treatment device

Abstract

The utility model relates to the technical field of heat supply, in particular to a flue gas treatment device. Comprising a cyclone dust removal device and a water-water heat exchanger, an exhaust fan and a flue gas heat exchanger are connected to the lower portion of a heat preservation exhaust pipeline, a material collecting ash hopper is connected to the lower portion of the cyclone dust removal device in an inserted mode, and the water-water heat exchanger is installed on the outer side of the cyclone dust removal device. The end of the water-water heat exchanger is connected with a water outlet pipeline, a copper-nickel alloy pipeline, a water return pipeline and a heat exchanger water pump. An exhaust fan pumps clean air into the flue gas heat exchanger through a heat preservation exhaust pipeline, heat exchange treatment is conducted on the clean air, and a heat medium in the water-water heat exchanger enters a copper-nickel alloy pipeline through a water outlet pipeline and then flows back into the water-water heat exchanger through a water return pipeline; and at the moment, the cold medium enters the water-water heat exchanger through the water inlet pipe for heat exchange and then is discharged through the water return pipe, heat of the particulate matter can be recycled in the mode, and waste heat of the flue gas can be comprehensively and reliably recycled in the mode.

Description

Technical Field

[0001] The utility model relates to the technical field of heating and heat supply, in particular to a flue gas treatment device. Background Art

[0002] The flue gas in the heating system usually needs to be treated before being discharged. The flue gas needs to be purified before discharge. The treatment devices include flue gas desulfurization devices, flue gas denitrification devices, flue gas dust removal devices and flue gas waste heat recovery devices. The first step of flue gas treatment is flue gas collection. After that, the flue gas passes through the flue gas dust removal device to remove particulate matter and dust in the flue gas. Common methods include gravity sedimentation, cyclone separation and filtration, and then the gas is subjected to purification processes such as desulfurization and denitrification.

[0003] Flue gas dust removal devices often use cyclone dust collectors to remove particulate matter in the flue gas. During the cyclone dust removal process, the particulate matter will be collected in the aggregate hopper below the cyclone dust collector. The heat recovery in the cyclone dust removal is mainly to recover the heat from the flue gas. The methods used include adding a circulation pipe inside or outside the cyclone dust removal device, or adding a heat exchanger at the flue gas inlet. Most of the above methods are used during use. The flue gas heat exchanger is mainly for the heat of the gas in the flue gas, but there is also heat in the particulate matter in the flue gas. Directly discharging it into the aggregate hopper will cause heat waste, which will reduce the efficiency of heat exchange and affect the efficiency of waste heat recovery. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a flue gas treatment device to solve the problem that heat recovery in cyclone dust removal is mainly to recover heat from flue gas, but there is also heat in the particulate matter in the flue gas, and directly discharging it into the aggregate ash hopper will cause heat waste, which will further reduce the efficiency of heat exchange and affect the recovery efficiency of waste heat.

[0005] To achieve the above objectives, the utility model adopts the following technical solution: a flue gas treatment device, comprising a cyclone dust removal device and a water-to-water heat exchanger, wherein an insulated exhaust duct and a flue gas inlet are arranged at the top of the cyclone dust removal device, an exhaust fan is connected to the bottom of the insulated exhaust duct, and the end of the exhaust fan away from the insulated exhaust duct is connected to the flue gas heat exchanger, an aggregate ash hopper is plugged into the bottom of the cyclone dust removal device, and a discharge valve is installed at the bottom of the aggregate ash hopper, the water-to-water heat exchanger is installed on the outside of the cyclone dust removal device, and an outlet pipe is connected to the end of the water-to-water heat exchanger, a copper-nickel alloy pipe is connected to the bottom of the outlet pipe, and a return pipe is connected to the end of the copper-nickel alloy pipe away from the outlet pipe, the return pipe is connected to the water-to-water heat exchanger, and a heat exchanger water pump is installed on the return pipe.

[0006] To facilitate the discharge of particles:

[0007] As a further improvement of the above technical solution: the cross-section of the aggregate ash hopper is arranged in a funnel shape.

[0008] The beneficial effect of this improvement is that the funnel-shaped arrangement allows the particles inside the aggregate hopper to be quickly and conveniently discharged from the inside of the aggregate hopper under the action of gravity, thereby facilitating the transfer of the particles.

[0009] In order to make the installation of the water outlet pipe more firm and stable:

[0010] As a further improvement of the above technical solution: the water outlet pipe and the aggregate ash hopper are fixed by a bracket.

[0011] The beneficial effect of this improvement is that the water outlet pipe can be supported and fixed by the bracket, ensuring that the water outlet pipe is more firm and stable when transporting heat medium, thereby facilitating the connection between the water outlet pipe and the copper-nickel alloy pipe.

[0012] To facilitate the transportation of heat medium:

[0013] As a further improvement of the above technical solution: the water outlet pipe and the top surface of the aggregate ash hopper are arranged parallel to each other.

[0014] The beneficial effect of this improvement is that the parallel arrangement allows the heat medium to enter the interior of the copper-nickel alloy pipe evenly, facilitating the transportation of the heat medium, and further facilitating the heat exchange of the copper-nickel alloy pipe with the particulate matter inside the aggregate ash hopper.

[0015] To facilitate heat exchange of copper-nickel alloy pipes:

[0016] As a further improvement of the above technical solution: the copper-nickel alloy pipes are installed below the water outlet pipe at equal intervals.

[0017] The beneficial effect of this improvement is that the heat medium inside the water-to-water heat exchanger enters the interior of the copper-nickel alloy pipe through the water outlet pipe, and the heat medium passing through the interior of the copper-nickel alloy pipe absorbs the heat of the particulate matter inside the aggregate ash hopper. The copper-nickel alloy pipes installed at equal intervals can perform comprehensive and reliable heat exchange on the particulate matter inside the aggregate ash hopper, thereby ensuring the efficiency of heat exchange.

[0018] In order to facilitate the cold medium to enter and discharge from the water-to-water heat exchanger:

[0019] As a further improvement of the above technical solution: a water inlet pipe and a water return pipe are respectively installed at both ends of the water-to-water heat exchanger.

[0020] The beneficial effect of this improvement is that the cold medium enters the water-to-water heat exchanger through the water inlet pipe for internal heat exchange and is discharged through the return pipe to complete the heat exchange.

[0021] In order to ensure the stability and firmness of the water-to-water heat exchanger installation:

[0022] As a further improvement of the above technical solution: a bracket is arranged below the water-to-water heat exchanger, and the water-to-water heat exchanger is fixed to the bracket by bolts.

[0023] The beneficial effect of this improvement is that the bracket can reliably and stably support the water-to-water heat exchanger, making the water-to-water heat exchanger more stable during use, reducing the vibration and noise of the water-to-water heat exchanger, and thus facilitating the heat exchange of the water-to-water heat exchanger.

[0024] In order to control the on and off of the aggregate hopper and the cyclone dust removal device:

[0025] As a further improvement of the above technical solution: a valve is installed at the connection between the cyclone dust removal device and the aggregate hopper.

[0026] The beneficial effect of this improvement is that when the cyclone dust removal device is running, the valve can be closed and the discharge valve can be opened to discharge the particles inside the aggregate hopper. The connection and disconnection of the cyclone dust removal device and the aggregate hopper can be controlled according to actual needs.

[0027] The beneficial effects of the utility model are as follows: the exhaust fan draws clean air into the interior of the flue gas heat exchanger through the insulated exhaust duct, and performs heat exchange treatment on the clean air; the hot medium in the water-to-water heat exchanger enters the interior of the copper-nickel alloy pipe through the outlet pipe and then flows back to the interior of the water-to-water heat exchanger through the return pipe; at this time, the cold medium enters the interior of the water-to-water heat exchanger through the water inlet pipe and is discharged through the return pipe after heat exchange, thus completing the heat exchange. This method can recover the heat of the particulate matter, and adopt this method to comprehensively and reliably recover the waste heat of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall main structure.

[0029] Figure 2 It is a schematic diagram of the overall right view structure.

[0030] Figure 3 This is the first axonometric structural schematic diagram of the water-to-water heat exchanger and the water outlet pipe.

[0031] Figure 4 This is a schematic diagram of the second axonometric structure of the water-to-water heat exchanger and the water outlet pipe.

[0032] Figure 5 This is a schematic diagram of the axonometric structure of the copper-nickel alloy pipeline.

[0033] In the figure: 1. Cyclone dust removal device; 11. Insulated exhaust duct; 12. Exhaust fan; 13. Flue gas heat exchanger; 14. Flue gas inlet; 2. Aggregate ash hopper; 21. Discharge valve door; 3. Water-to-water heat exchanger; 31. Water outlet pipe; 32. Copper-nickel alloy pipe; 33. Return water pipe; 34. Heat exchanger water pump. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0035] like Figure 1-5As shown, a flue gas treatment device includes a cyclone dust removal device 1 and a water-to-water heat exchanger 3, wherein the top of the cyclone dust removal device 1 is provided with an insulated exhaust duct 11 and a flue gas inlet 14, an exhaust fan 12 is connected to the bottom of the insulated exhaust duct 11, and the end of the exhaust fan 12 away from the insulated exhaust duct 11 is connected to the flue gas heat exchanger 13, an aggregate ash hopper 2 is plugged into the bottom of the cyclone dust removal device 1, and a discharge valve 21 is installed at the bottom of the aggregate ash hopper 2, the water-to-water heat exchanger 3 is installed on the outside of the cyclone dust removal device 1, and a water outlet pipe 31 is connected to the end of the water-to-water heat exchanger 3, a copper-nickel alloy pipe 32 is connected to the bottom of the water outlet pipe 31, and the end of the copper-nickel alloy pipe 32 away from the water outlet pipe 31 is connected to the flue gas heat exchanger 13. A return pipe 33 is connected, the return pipe 33 is connected to the water-to-water heat exchanger 3, and a heat exchanger water pump 34 is installed on the return pipe 33. The exhaust fan 12 pumps clean air to the inside of the flue gas heat exchanger 13 through the insulated exhaust pipe 11 to perform heat exchange treatment on the clean air. The hot medium inside the water-to-water heat exchanger 3 enters the inside of the copper-nickel alloy pipe 32 through the outlet pipe 31 and then flows back to the inside of the water-to-water heat exchanger 3 through the return pipe 33. At this time, the cold medium enters the inside of the water-to-water heat exchanger 3 through the water inlet pipe for heat exchange and is discharged through the return pipe to complete the heat exchange. This method can recover the heat of the particulate matter, and this method can be used to fully and reliably recover the waste heat of the flue gas. The cross-section of the aggregate ash hopper 2 adopts The funnel-shaped setting can make the particles inside the aggregate ash hopper 2 be discharged quickly and conveniently from the aggregate ash hopper 2 under the action of gravity, and facilitate the transfer of particles. The outlet pipe 31 is fixed to the aggregate ash hopper 2 by a bracket, and the outlet pipe 31 can be supported and fixed by the bracket to ensure that the outlet pipe 31 is more firm and stable when conveying heat medium, thereby facilitating the connection between the outlet pipe 31 and the copper-nickel alloy pipe 32. The outlet pipe 31 and the top surface of the aggregate ash hopper 2 are arranged in parallel with each other. The parallel setting can make the heat medium evenly enter the copper-nickel alloy pipe 32, thereby facilitating the conveyance of heat medium, and thereby facilitating the copper-nickel alloy pipe 32 to the particles inside the aggregate ash hopper 2. The copper-nickel alloy pipes 32 are installed at equal intervals below the outlet pipe 31. The heat medium inside the water-to-water heat exchanger 3 enters the copper-nickel alloy pipe 32 through the outlet pipe 31. The heat medium passing through the copper-nickel alloy pipe 32 absorbs the heat of the particles inside the aggregate ash hopper 2. The copper-nickel alloy pipes 32 installed at equal intervals can perform comprehensive and reliable heat exchange on the particles inside the aggregate ash hopper 2 to ensure the efficiency of heat exchange. The water-to-water heat exchanger 3 is respectively provided with an inlet pipe and a return pipe at both ends. The cold medium enters the water-to-water heat exchanger 3 through the inlet pipe for heat exchange and is discharged through the return pipe to complete the heat exchange. A bracket is provided below the water-to-water heat exchanger 3, and the water-to-water heat exchanger 3 is fixed to the bracket by bolts.The bracket can reliably and stably support the water-to-water heat exchanger 3, making the water-to-water heat exchanger 3 more stable when in use, reducing the vibration and noise of the water-to-water heat exchanger 3, and thus facilitating the heat exchange of the water-to-water heat exchanger 3. A valve is installed at the connection between the cyclone dust removal device 1 and the aggregate ash hopper 2. When the cyclone dust removal device 1 is running, the valve can be closed and the discharge valve 21 can be opened to discharge the particles inside the aggregate ash hopper 2. The on-off of the cyclone dust removal device 1 and the aggregate ash hopper 2 can be controlled according to actual needs.

[0036] The working principle of the utility model is as follows: when the device is used, the flue gas enters the interior of the cyclone dust removal device 1 through the flue gas inlet 14 to form a cyclone. The particles fall with the cyclone, and the clean air rises. The exhaust fan 12 pumps the clean air to the interior of the flue gas heat exchanger 13 through the insulated exhaust duct 11, and performs heat exchange treatment on the clean air. After that, the air enters the subsequent desulfurization and denitrification device for internal treatment. The separated particles gather in the aggregate ash hopper 2. At this time, the heat exchanger water pump 34 drives the water inside the water-to-water heat exchanger 3 to operate, and the heat medium inside the water-to-water heat exchanger 3 passes through the outlet water. The pipe 31 enters the interior of the copper-nickel alloy pipe 32. The hot medium passing through the copper-nickel alloy pipe 32 absorbs the heat of the particulate matter inside the aggregate ash hopper 2, and refluxes into the water-to-water heat exchanger 3 through the return pipe 33 and the heat exchanger water pump 34. At this time, the cold medium enters the interior of the water-to-water heat exchanger 3 through the water inlet pipe, and is discharged through the return pipe after heat exchange, completing the heat exchange. This method can recover the heat of the particulate matter. This method can be used to comprehensively and reliably recover the waste heat of the flue gas. After the heat of the particulate matter is recovered, the discharge valve 21 can be opened to discharge the particulate matter.

[0037] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0038] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A flue gas treatment device, comprising a cyclone dust removal device (1) and a water-to-water heat exchanger (3), wherein the top of the cyclone dust removal device (1) is provided with a heat-insulating exhaust duct (11) and a flue gas inlet (14), Features: An exhaust fan (12) is connected below the insulated exhaust duct (11), and a flue gas heat exchanger (13) is connected to one end of the exhaust fan (12) away from the insulated exhaust duct (11). An aggregate hopper (2) is plugged below the cyclone dust removal device (1), and a discharge valve (21) is installed at the bottom of the aggregate hopper (2). The water-to-water heat exchanger (3) is installed on the outside of the cyclone dust removal device (1), and an outlet pipe (31) is connected to the end of the water-to-water heat exchanger (3). A copper-nickel alloy pipe (32) is connected below the outlet pipe (31), and a return pipe (33) is connected to one end of the copper-nickel alloy pipe (32) away from the outlet pipe (31). The return pipe (33) is in communication with the water-to-water heat exchanger (3), and a heat exchanger water pump (34) is installed on the return pipe (33).

2. A flue gas treatment device according to claim 1, Features: The cross section of the aggregate ash hopper (2) is arranged in a funnel shape.

3. A flue gas treatment device according to claim 1, Features: The water outlet pipe (31) and the aggregate ash hopper (2) are fixed via a bracket.

4. A flue gas treatment device according to claim 1, Features: The water outlet pipe (31) and the top surface of the aggregate ash hopper (2) are arranged parallel to each other.

5. A flue gas treatment device according to claim 1, Features: The copper-nickel alloy pipes (32) are installed at equal intervals below the water outlet pipe (31).

6. A flue gas treatment device according to claim 1, Features: A water inlet pipe and a water return pipe are respectively installed at both ends of the water-to-water heat exchanger (3).

7. A flue gas treatment device according to claim 1, Features: A bracket is provided below the water-to-water heat exchanger (3), and the water-to-water heat exchanger (3) and the bracket are fixed by bolts.

8. A flue gas treatment device according to claim 1, Features: A valve is installed at the connection between the cyclone dust removal device (1) and the aggregate ash hopper (2).

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