Recycling device for boiler waste gas

Abstract

The utility model discloses a boiler waste gas recycling device which comprises a heat preservation heating piece, a first organic working medium circulation piece, a first circulation heating assembly, an energy storage assembly, a second circulation heating assembly and a first heat exchange assembly. According to the heat conduction oil furnace, the heat preservation heating piece, the first circulation heating assembly for exchanging heat to the first organic working medium circulation piece and the second circulation heating assembly for exchanging heat to the energy storage assembly are arranged, and the energy storage assembly supplies heat to the first circulation heating assembly; waste heat in the waste gas waste heat discharge pipeline can be absorbed by the first heat exchange assembly to heat the energy storage assembly, and when the heat conduction oil furnace stops working, heat in the energy storage assembly can be provided for the first circulation heating assembly, so that daily heat preservation of the asphalt tank body is achieved, waste heat in waste gas is fully utilized, and the service life of the asphalt tank body is prolonged. And waste of waste gas waste heat resources is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt production equipment, and in particular relates to a boiler waste gas recycling device. Background Art

[0002] Before the asphalt is transported to the foaming device for asphalt foaming through the asphalt conveying device, the asphalt transported to the construction site needs to be stored in an asphalt tank. During this period, the asphalt tank needs to be heated and insulated to maintain the viscosity of the asphalt in the tank.

[0003] For the heating of asphalt in the asphalt tank, indirect heating with heat transfer oil is mostly used. Indirect heating with heat transfer oil is a common method for medium-temperature heating, that is, organic heat carrier is used as heat transfer medium to indirectly heat asphalt. The temperature of heat transfer oil is controlled at about 180℃, which can effectively avoid aging and deterioration of asphalt caused by excessive temperature. The heating of heat transfer oil is carried out in a heat transfer oil furnace, and the heat transfer oil furnace is usually burned by coal or gas when working, which will produce waste gas discharged from the waste heat exhaust pipe. In the existing asphalt production, the waste heat in the waste gas is mostly not effectively utilized, resulting in a certain amount of energy waste.

[0004] Based on the deficiencies in the prior art, the utility model discloses a boiler exhaust gas recycling device. When the thermal oil furnace heats the asphalt in the asphalt tank body, the waste heat in the exhaust gas waste heat discharge pipe will be absorbed by the first heat exchange component to achieve heating of the energy storage component. When the thermal oil furnace stops working, the heat inside the energy storage component can be provided to the first circulation heating component, thereby achieving daily insulation of the asphalt tank body, making full use of the waste heat in the exhaust gas, and reducing the waste of waste heat resources. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a boiler exhaust gas recycling device to solve the technical problems raised in the background technology.

[0006] The utility model provides the following technical solutions:

[0007] A boiler waste gas recycling device, comprising

[0008] A heat preservation and heating element, wherein the heat preservation and heating element comprises a spiral heating pipe, and the spiral heating pipe is arranged on the outer side of the asphalt tank body;

[0009] A first organic working medium circulation part, the first organic working medium circulation part comprises a circulation pipe, and two ends of the circulation pipe are respectively connected to two ends of the spiral heating pipe;

[0010] A first circulation heating component is used to heat the first organic working medium inside the circulation pipe;

[0011] An energy storage component, the energy storage component is used to provide heat to the first circulation heating component;

[0012] a second circulation heating component, the second circulation heating component is used to provide heat to the energy storage component;

[0013] The first heat exchange component is arranged inside the exhaust gas waste heat discharge pipe, and the first heat exchange component is used to absorb the initial heat inside the exhaust gas waste heat discharge pipe and provide heat to the second circulation heating component.

[0014] Preferably, a heat-insulating layer is further provided on the outer side of the asphalt tank body, the spiral heating pipe is located between the asphalt tank body and the heat-insulating layer, and the heat-insulating heating element further includes a heat-insulating filling layer.

[0015] Preferably, the first circulation heating component includes a first evaporator, a first compressor, a first condenser, and a first expansion valve. The first evaporator, the first compressor, the first condenser, and the first expansion valve are connected end to end in sequence through a first pipeline, and the first pipeline is filled with a second organic working fluid.

[0016] Preferably, the first organic working medium circulation component also includes a first organic working medium box and a first pump body, the liquid outlet of the first organic working medium box is connected with the input end of the first pump body through a circulation pipe, the output end of the first pump body is connected with the cold water inlet end of the first condenser through a circulation pipe, the hot water outlet end of the first condenser is connected with the input end of the connecting spiral heating tube through a circulation pipe, and the output end of the spiral heating tube is connected with the liquid inlet of the first organic working medium box through a circulation pipe.

[0017] Preferably, the second circulation heating component includes a second evaporator, a second compressor, a second condenser, and a second expansion valve. The second evaporator, the second compressor, the second condenser, and the second expansion valve are connected end to end in sequence through a second pipeline, and the interior of the second pipeline is filled with a third organic working fluid.

[0018] Preferably, the energy storage assembly includes an energy storage water tank, and the first evaporator and the second condenser are both arranged inside the energy storage water tank.

[0019] Preferably, the first heat exchange component includes a U-shaped heat exchange tube, which is arranged inside the exhaust gas waste heat discharge pipe, and a heat exchange medium is arranged inside the U-shaped heat exchange tube. The input end of the U-shaped heat exchange tube is provided with a first liquid inlet pipe, and the output end of the U-shaped heat exchange tube is provided with a first liquid outlet pipe. A second disc-shaped heat exchange tube is provided on the side of the second evaporator, and the other end of the first liquid outlet pipe is connected to the input end of the second disc-shaped heat exchange tube, and the other end of the first liquid inlet pipe is connected to the output end of the second disc-shaped heat exchange tube through a second pump body.

[0020] Preferably, a second heat exchange component is further included, the first heat exchange component is arranged inside the exhaust gas waste heat discharge pipe, and the second heat exchange component is used to absorb the secondary heat inside the exhaust gas waste heat discharge pipe and provide heat to the first circulation heating component. The structure of the second heat exchange component is the same as that of the first heat exchange component.

[0021] Preferably, the first circulation heating component also includes a third evaporator, the input end of the third evaporator is connected to the output end of the first expansion valve and the input end of the first evaporator respectively through a first three-way solenoid valve, and the output end of the third evaporator is connected to the input end of the first compressor and the output end of the first evaporator respectively through a second three-way solenoid valve.

[0022] Preferably, the first evaporator and the third evaporator do not work at the same time.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model discloses a device for recycling boiler waste gas. By arranging a heat-insulating heating element, a first circulation heating component for exchanging heat with a first organic working medium circulation element, and a second circulation heating component for exchanging heat with an energy storage component, the energy storage component provides heat to the first circulation heating component. When the heat-conducting oil furnace heats the asphalt in the asphalt tank body, the waste heat in the waste heat discharge pipe of the waste gas will be absorbed by the first heat exchange component, so as to achieve heating of the energy storage component. When the heat-conducting oil furnace stops working, the heat inside the energy storage component can be provided to the first circulation heating component, so as to achieve daily heat preservation of the asphalt tank body, make full use of the waste heat in the waste gas, and reduce the waste of waste heat resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the first circulation heating component of the utility model.

[0028] Figure 3 This is a schematic structural diagram of the first heat exchange component of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-3 As shown, the heat preservation heating element includes a spiral heating tube 31, and the spiral heating tube 31 is arranged on the outer side of the asphalt tank body 1;

[0032] A first organic working medium circulation part 4, wherein the first organic working medium circulation part 4 comprises a circulation pipe 41, and two ends of the circulation pipe 41 are respectively connected to two ends of the spiral heating pipe 31;

[0033] A first circulation heating component 5 is used to heat the first organic working medium inside the circulation pipe 41;

[0034] An energy storage component 7, the energy storage component 7 is used to provide heat to the first circulation heating component 5;

[0035] A second circulation heating component 8, the second circulation heating component 8 is used to provide heat to the energy storage component 7;

[0036] The first heat exchange component 6 is arranged inside the exhaust gas waste heat discharge pipe 10, and the first heat exchange component 6 is used to absorb the initial heat inside the exhaust gas waste heat discharge pipe 10 and provide heat to the second circulation heating component 8. By setting a heat preservation heating component, a first circulation heating component that exchanges heat with the first organic working medium circulation component, and a second circulation heating component that exchanges heat with the energy storage component, the energy storage component provides heat to the first circulation heating component, so that when the thermal oil furnace heats the asphalt in the asphalt tank, the waste heat in the exhaust gas waste heat discharge pipe will be absorbed by the first heat exchange component to achieve heating of the energy storage component. When the thermal oil furnace stops working, the heat inside the energy storage component can be provided to the first circulation heating component, thereby achieving daily insulation of the asphalt tank, making full use of the waste heat in the exhaust gas, and reducing the waste of waste heat resources.

[0037] A second spiral heating tube is provided inside the asphalt tank 1, and two ends of the second spiral heating tube are connected to two ends of the heat transfer oil pipe of the heat transfer oil furnace, so that the asphalt is heated by the heat transfer oil entering the second spiral heating tube.

[0038] The outer side of the asphalt tank body 1 is also provided with an insulation layer 2, the spiral heating pipe 31 is located between the asphalt tank body 1 and the insulation layer 2, and the insulation heating element also includes an insulation filling layer, and the material of the insulation filling layer is sand.

[0039] The first circulation heating component 5 includes a first evaporator 51, a first compressor 52, a first condenser 53, and a first expansion valve 54. The first evaporator 51, the first compressor 52, the first condenser 53, and the first expansion valve 54 are connected end to end in sequence through a first pipeline, and the first pipeline is filled with a second organic working medium.

[0040] The first organic working medium circulation component 4 also includes a first organic working medium box 43 and a first pump body 42. The liquid outlet of the first organic working medium box 43 is connected to the input end of the first pump body 42 through a circulation pipe 41. The output end of the first pump body 42 is connected to the cold water inlet end of the first condenser 53 through the circulation pipe 41. The hot water outlet end of the first condenser 53 is connected to the input end of the connecting spiral heating pipe 31 through the circulation pipe 41. The output end of the spiral heating pipe 31 is connected to the liquid inlet of the first organic working medium box 43 through the circulation pipe 41.

[0041] The second circulation heating component 8 includes a second evaporator 81, a second compressor 82, a second condenser 83, and a second expansion valve 54. The second evaporator 81, the second compressor 82, the second condenser 83, and the second expansion valve 54 are connected end to end in sequence through a second pipeline, and the interior of the second pipeline is filled with a third organic working medium.

[0042] The energy storage assembly 7 includes an energy storage water tank 71 , and the first evaporator 51 and the second condenser 83 are both arranged inside the energy storage water tank 71 .

[0043] The first heat exchange component 6 includes a U-shaped heat exchange tube 61, which is arranged inside the exhaust gas waste heat discharge pipe 10. A heat exchange medium is arranged inside the U-shaped heat exchange tube. A first liquid inlet pipe 62 is arranged at the input end of the U-shaped heat exchange tube, and a first liquid outlet pipe 63 is arranged at the output end of the U-shaped heat exchange tube. A second disc-shaped heat exchange tube 85 is arranged on the side of the second evaporator 81. The other end of the first liquid outlet pipe is connected to the input end of the second disc-shaped heat exchange tube, and the other end of the first liquid inlet pipe is connected to the output end of the second disc-shaped heat exchange tube through a second pump body 64.

[0044] A heat collecting fin 65 is arranged on the outside of the U-shaped heat exchange tube. The heat collecting fin is an annular heat collecting fin coaxially arranged on the outside of the U-shaped heat exchange tube. There are a plurality of heat collecting fins, which are evenly arranged at equal intervals along the extension direction of the U-shaped heat exchange tube.

[0045] The first heat exchange component 9 is provided inside the exhaust gas waste heat discharge pipe 10, and the second heat exchange component 9 is used to absorb the secondary heat inside the exhaust gas waste heat discharge pipe 10 and provide heat to the first circulation heating component 5. The structure of the second heat exchange component 9 is the same as that of the first heat exchange component 6.

[0046] The first circulation heating component 5 also includes a third evaporator 13, the input end of the third evaporator 13 is connected to the output end of the first expansion valve and the input end of the first evaporator 51 respectively through a first three-way solenoid valve 11, and the output end of the third evaporator 13 is connected to the input end of the first compressor 52 and the output end of the first evaporator 51 respectively through a second three-way solenoid valve 12.

[0047] The first evaporator 51 and the third evaporator 13 do not work at the same time. That is, when the thermal oil furnace is working, the first evaporator 51 does not work, and the third evaporator 13 works. When the thermal oil furnace is not working, the first evaporator 51 works, and the third evaporator 13 does not work. Whether the first evaporator 51 and the third evaporator 13 work or not is controlled by the first three-way solenoid valve 11 and the second three-way solenoid valve 12.

[0048] When the waste heat discharge pipe 10 discharges waste heat from the exhaust gas, the first heat exchange component can perform the first heat exchange on the waste heat from the pipe and provide the heat to the second circulation heating component 8. The second circulation heating component 8 realizes heating and energy storage of the energy storage component 7. The second heat exchange component can perform the second heat exchange on the waste heat from the pipe and provide the heat to the first circulation heating component 5. The first circulation heating component 5 heats the first organic working fluid passing through the circulation pipe 41. The first organic working fluid circulates to the inside of the spiral heating pipe 31 to achieve heating and insulation of the asphalt tank body. When the waste heat discharge pipe no longer discharges waste heat, the heat inside the energy storage component can provide the heat required for the first circulation heating component 5 to work continuously for a long time and continue to insulate the asphalt tank body.

[0049] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A boiler exhaust gas recycling device, characterized in that: include A heat-insulating heating element, the heat-insulating heating element comprising a spiral heating tube (31), the spiral heating tube (31) being arranged on the outer side of the asphalt tank body (1); A first organic working medium circulation component (4), the first organic working medium circulation component (4) comprising a circulation pipe (41), the two ends of the circulation pipe (41) being respectively connected to the two ends of the spiral heating pipe (31); A first circulation heating component (5) is used to heat the first organic working fluid inside the circulation pipe (41); An energy storage component (7), the energy storage component (7) being used to provide heat to the first circulation heating component (5); a second circulation heating component (8), the second circulation heating component (8) being used to provide heat to the energy storage component (7); A first heat exchange component (6), the first heat exchange component (6) being arranged inside the exhaust gas waste heat discharge pipe (10), the first heat exchange component (6) being used to absorb the initial heat inside the exhaust gas waste heat discharge pipe (10) and provide heat to the second circulation heating component (8).

2. The boiler exhaust gas recycling device according to claim 1, characterized in that: The first circulation heating component (5) comprises a first evaporator (51), a first compressor (52), a first condenser (53), and a first expansion valve (54); the first evaporator (51), the first compressor (52), the first condenser (53), and the first expansion valve (54) are connected end to end in sequence via a first pipeline; the first pipeline is filled with a second organic working fluid.

3. The boiler exhaust gas recycling device according to claim 2, characterized in that: The second circulation heating component (8) comprises a second evaporator (81), a second compressor (82), a second condenser (83), and a second expansion valve (84); the second evaporator (81), the second compressor (82), the second condenser (83), and the second expansion valve (84) are connected end to end in sequence via a second pipeline; the interior of the second pipeline is filled with a third organic working fluid.

4. The boiler exhaust gas recycling device according to claim 3, characterized in that: The energy storage component (7) comprises an energy storage water tank (71), and the first evaporator (51) and the second condenser (83) are both arranged inside the energy storage water tank (71).

5. A boiler exhaust gas recycling device according to claim 4, characterized in that: The first heat exchange component (6) comprises a U-shaped heat exchange tube (61), the U-shaped heat exchange tube being arranged inside the exhaust gas waste heat discharge pipe (10), a heat exchange medium being arranged inside the U-shaped heat exchange tube, a first liquid inlet tube (62) being arranged at the input end of the U-shaped heat exchange tube, a first liquid outlet tube (63) being arranged at the output end of the U-shaped heat exchange tube, a second disc-shaped heat exchange tube (85) being arranged on the side of the second evaporator (81), the other end of the first liquid outlet tube being connected to the input end of the second disc-shaped heat exchange tube, and the other end of the first liquid inlet tube being connected to the output end of the second disc-shaped heat exchange tube via a second pump body (64).

6. The boiler exhaust gas recycling device according to claim 1, characterized in that: It also comprises a second heat exchange component (9), which is arranged inside the exhaust gas waste heat discharge pipe (10), and is used to absorb secondary heat inside the exhaust gas waste heat discharge pipe (10) and provide heat to the first circulation heating component (5).

7. A boiler exhaust gas recycling device according to claim 2, characterized in that: The first circulation heating component (5) further comprises a third evaporator (13); an input end of the third evaporator (13) is respectively connected to an output end of the first expansion valve and an input end of the first evaporator (51) via a first three-way solenoid valve (11); and an output end of the third evaporator (13) is respectively connected to an input end of the first compressor (52) and an output end of the first evaporator (51) via a second three-way solenoid valve (12).

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