Heat exchange system of incinerator and incinerator

Abstract

The invention discloses a heat exchange system of an incinerator and the incinerator, and relates to the technical field of gasification combustion, and the heat exchange system of the incinerator comprises an air preheater and a first heat exchange pipeline. The air preheater is provided with an air inlet, a heating air duct and an air outlet which are sequentially communicated. The first heat exchange pipeline comprises a first medium inlet, a first medium outlet, a first main heat absorption pipeline, a first auxiliary heat absorption pipeline and a first heat release pipeline, the first main heat absorption pipeline and the first auxiliary heat absorption pipeline are at least partially located in a heat exchange cavity of the incinerator, and the first heat release pipeline is at least partially located in the heating air flue. Wherein the first medium inlet, the first main heat absorption pipeline, the first heat release pipeline and the first medium outlet are communicated in sequence, the first heat exchange pipeline further comprises a first switch valve, and the first switch valve is connected with the first auxiliary heat absorption pipeline in parallel. According to the heat exchange system of the incinerator, the temperature stability of smoke exhausted by the heat exchange cavity can be improved, and the environmental protection property of the incinerator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gasification combustion, and particularly relates to a heat exchange system of an incinerator and an incinerator. Background Art

[0002] The incineration method for treating solid waste has been widely promoted and applied globally due to its advantages such as high efficiency, significant volume reduction, and high energy utilization efficiency. In related technologies, gasification incinerators are mainly used for incinerating domestic waste, industrial waste, sludge, and hazardous waste. The flue gas generated after incineration needs to be purified and decontaminated before it can be discharged. However, the temperature of the flue gas is usually relatively high, and it is necessary to cool down the flue gas before purification and decontamination. Usually, the exhaust gas temperature entering the final deacidification and dust removal system is between 160 - 220 °C, and this temperature value is required to be relatively stable to ensure the normal operation of the purification and decontamination system. If the exhaust gas temperature is unstable, it will have a great impact on the working efficiency and stability of semi-dry and wet deacidification systems. In severe cases, it may not be able to work properly. Especially for bag-type dust removal equipment, the temperature needs to be within a suitable range. Too high temperature will damage the filter bags, and too low temperature will cause condensation corrosion and blockage of the filter bags.

[0003] For example, in the patent with the application number CN202210681582.9, a dual-medium TFB gasification incinerator is disclosed. By combining heat transfer oil and water as the main cooling media, water-cooled walls, heat transfer oil coils, heat transfer oil convection tube rows, economizer tube rows with water as the medium inside the tubes, and air preheaters are arranged in a cascade manner to achieve full absorption of heat and obtain the maximum thermal efficiency. However, due to the large range of fluctuations in the composition and calorific value of the incoming domestic waste, industrial waste, sludge, and hazardous waste, and the change in the operating load, the exhaust gas temperature of the incinerator will have a large range of fluctuations. Especially when incinerating industrial waste and supplying steam externally, there will be large fluctuations due to the large range of changes in the user load. Therefore, it is necessary to design a special heat exchange system that can overcome the fluctuations in fuel composition, calorific value, and incinerator operating load and maintain the relative stability of the exhaust gas temperature. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, the present invention provides a heat exchange system of an incinerator, and the heat exchange system can improve the temperature stability of the discharged flue gas and enhance the environmental protection performance of the incinerator.

[0005] The present invention also provides an incinerator having the above heat exchange system.

[0006] The heat exchange system of an incinerator according to an embodiment of the present invention includes: an air preheater having an air inlet, a heating air duct, and an air outlet that are sequentially connected; a first heat exchange pipeline including a first medium inlet, a first medium outlet, a first main heat absorption pipeline, a first auxiliary heat absorption pipeline, and a first heat release pipeline. At least a part of the first main heat absorption pipeline and the first auxiliary heat absorption pipeline is located in the heat exchange cavity of the incinerator, and at least a part of the first heat release pipeline is located in the heating air duct. Wherein, the first medium inlet, the first main heat absorption pipeline, the first heat release pipeline, and the first medium outlet are sequentially conducted, and the first heat exchange pipeline further includes a first switching valve that is connected in parallel with the first auxiliary heat absorption pipeline. The first switching valve is located between the first medium inlet and the first main heat absorption pipeline, or the first switching valve is located between the first main heat absorption pipeline and the first heat release pipeline.

[0007] For the heat exchange system of an incinerator according to an embodiment of the present invention, when all of the first medium flows through the first main heat absorption pipeline and exchanges heat with the inside of the heat exchange cavity, it can ensure the cooling effect on the flue gas in the heat exchange cavity. By providing the first auxiliary heat exchange pipeline and the first switching valve connected in parallel, and adjusting the switching valve, the flow rate of the first medium flowing through the first auxiliary heat absorption pipeline and exchanging heat with the inside of the heat exchange cavity can be adjusted, thereby realizing the adjustment of the heat exchange efficiency in the heat exchange cavity. This enables the heat exchange efficiency of the first medium in the first heat exchange pipeline with respect to the heat exchange cavity to be adjusted corresponding to the temperature in the heat exchange cavity, so as to control the temperature of the flue gas discharged from the heat exchange cavity to be stable. At the same time, the heat in the heat exchange cavity can be transferred to the air preheater to heat the cold air, and the heat in the heat exchange cavity can also be used to heat the first medium itself, thereby improving the utilization rate of the heat in the heat exchange cavity, achieving energy savings, and improving the environmental protection performance of the incinerator.

[0008] In some embodiments, the first heat exchange pipeline further includes a second switching valve that is connected in parallel with the first heat release pipeline.

[0009] In some embodiments, the heat exchange system further includes: a second heat exchange pipeline including a second medium inlet, a second heat absorption pipeline, a second heat release pipeline, and a second medium outlet that are sequentially connected. At least a part of the second heat absorption pipeline is located in the heat exchange cavity of the incinerator, and at least a part of the second heat release pipeline is located in the heating air duct.

[0010] Furthermore, the first medium is water and the second medium is steam; in the flow direction of the flue gas in the heat exchange cavity of the incinerator, the first main heat absorption pipeline and the first auxiliary heat absorption pipeline are located downstream of the second heat absorption pipeline; in the flow direction of the air flow in the heating air duct, the first heat release pipeline is located upstream of the second heat release pipeline.

[0011] In some embodiments, the second heat exchange pipeline further includes a third switching valve, and the third switching valve is connected in parallel with the second heat release pipeline.

[0012] In some embodiments, the air preheater further includes: an adjustable wind deflector, which is arranged between the air inlet and the heating air duct to adjust the air volume entering the heating air duct.

[0013] Furthermore, the air preheater further includes: a cold air duct, which is connected in parallel with the heating air duct, and the cold air duct has an air inlet end, and the air inlet end is located between the air inlet and the adjustable wind deflector.

[0014] In some embodiments, the air preheater further includes: a driving fan, which drives cold air to flow into the air inlet.

[0015] The incinerator according to an embodiment of the present invention includes the heat exchange system of the incinerator described in the above embodiment.

[0016] The incinerator according to an embodiment of the present invention, by adopting the heat exchange system of the above embodiment, all the first medium flows through the first main heat absorption pipeline to exchange heat with the inside of the heat exchange cavity, which can ensure the cooling effect on the flue gas in the heat exchange cavity. The first sub-heat exchange pipeline and the first switching valve are arranged in parallel. By adjusting the switching valve, the flow rate of the first medium flowing through the first sub-heat absorption pipeline to exchange heat with the inside of the heat exchange cavity can be adjusted, so as to realize the adjustment of the heat exchange efficiency in the heat exchange cavity. The heat exchange efficiency of the first medium in the first heat exchange pipeline with respect to the inside of the heat exchange cavity can be adjusted corresponding to the temperature in the heat exchange cavity, so as to control the flue gas in the heat exchange cavity to have a stable temperature when discharged. At the same time, the heat in the heat exchange cavity can be transferred to the air preheater to heat the cold air, and the heat in the heat exchange cavity can also be used to heat the first medium itself, so as to improve the utilization rate of the heat in the heat exchange cavity, realize the saving of energy, and improve the environmental protection performance of the incinerator.

[0017] In some embodiments, the incinerator has a combustion cavity, and the air outlet communicates with the combustion cavity.

[0018] The main advantage of the present invention is to overcome the disadvantages of traditional heat exchange equipment that the heat exchange capacity responds passively when the temperature and volume of the incoming flue gas fluctuate, and the temperature of the discharged flue gas fluctuates greatly. It can be controlled by adjusting the flow rate of the heat exchange medium in different directions with the goal of stabilizing the final exhaust gas temperature, fully realizing the purpose that the back end remains basically unchanged regardless of how the front end changes, and taking into account the pair of contradictions between high energy efficiency at high load and high emissions at low load. Other additional aspects and advantages will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a heat exchange system of an incinerator according to an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of a heat exchange system of an incinerator according to another embodiment of the present invention.

[0021] Reference numerals:

[0022] heat exchange system 100,

[0023] air preheater 10, air inlet 11, heating air duct 12, air outlet 13, adjustable wind deflector 14, cold air duct 15,

[0024] first heat exchange pipeline 20, first medium inlet 21, first secondary heat absorption pipeline 22, first main heat absorption pipeline 23, first heat release pipeline 24, first medium outlet 25, first switching valve 26, second switching valve 27,

[0025] second heat exchange pipeline 30, second medium inlet 31, second heat absorption pipeline 32, second heat release pipeline 33, second medium outlet 34, third switching valve 35,

[0026] heat exchange chamber 200. Detailed implementation manners

[0027] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can recognize the applicability of other processes and / or the use of other materials.

[0029] The heat exchange system 100 of the incinerator and the incinerator according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0030] As Figure 1As shown in the figure, the heat exchange system 100 of the incinerator according to an embodiment of the present invention includes: an air preheater 10 and a first heat exchange pipeline 20. The air preheater 10 has an air inlet 11, a heating air duct 12, and an air outlet 13 that are sequentially connected. The first heat exchange pipeline 20 includes a first medium inlet 21, a first medium outlet 25, a first main heat absorption pipeline 23, a first auxiliary heat absorption pipeline 22, and a first heat release pipeline 24. At least a part of the first main heat absorption pipeline 23 and the first auxiliary heat absorption pipeline 22 is located in the heat exchange chamber 200 of the incinerator, and at least a part of the first heat release pipeline 24 is located in the heating air duct 12.

[0031] Wherein, the first medium inlet 21, the first main heat absorption pipeline 23, the first heat release pipeline 24, and the first medium outlet 25 are sequentially conducted. The first heat exchange pipeline 20 further includes a first switch valve 26, and the first switch valve 26 is connected in parallel with the first auxiliary heat absorption pipeline 22. The first switch valve 26 is located between the first medium inlet 21 and the first main heat absorption pipeline 23, or the first switch valve 26 is located between the first main heat absorption pipeline 23 and the first heat release pipeline 24.

[0032] It can be understood that when the first medium flows from the first medium inlet 21 to the first main heat absorption pipeline 23 and the first auxiliary heat absorption pipeline 22, it can exchange heat with the flue gas in the heat exchange chamber 200 in the first main heat absorption pipeline 23 and the first auxiliary heat absorption pipeline 22, so that the first medium can absorb the heat of the flue gas, heating the first medium while reducing the temperature of the flue gas. And the first medium heated in the first main heat absorption pipeline 23 and the first auxiliary heat absorption pipeline 22 flows into the first heat release pipeline 24, enabling the first heat release pipeline 24 to exchange heat with the cold air inlet in the heating channel, thereby heating the cold air and making the air preheater 10 output hot air at the air outlet 13. It can be seen that the first heat exchange pipeline 20 can reduce the temperature of the flue gas, while increasing the temperature of the first medium and heating the cold air in the heating air duct 12, enabling the air preheater 10 to output hot air.

[0033] In addition, the first switch valve 26 can be used to adjust the flow rate of the first medium in the first auxiliary heat absorption pipeline 22. When the first switch valve 26 is closed, all the first medium flows into the first auxiliary heat absorption pipeline 22, and all the first medium absorbs the heat in the heat exchange chamber 200 in the first auxiliary heat absorption pipeline 22; when the first switch valve 26 is open, the first medium is divided into the first auxiliary heat absorption pipeline 22 and the first switch valve 26, that is, a part of the first medium flows into the first auxiliary heat absorption pipe to absorb the heat in the heat exchange chamber 200, and the other part flows through the first switch valve 26 and does not absorb heat. That is to say, by adjusting the opening and closing degree of the first switch valve 26, the flow rate of the first medium that undergoes heat exchange in the first auxiliary heat absorption pipeline 22 and the heat exchange chamber 200 can be controlled, and the heat absorption efficiency in the first heat exchange chamber 200 can be adjusted.

[0034] Thus, all of the first medium flows through the first main heat absorption pipeline 23 to exchange heat with the inside of the heat exchange chamber 200, which can ensure the heat absorption effect of the first medium on the inside of the heat exchange chamber 200 and ensure the temperature reduction effect on the flue gas inside the heat exchange chamber 200. At the same time, a first auxiliary heat exchange pipeline and a first switching valve 26 are arranged in parallel. By adjusting the first switching valve 26, the flow rate of the first medium flowing through the first auxiliary heat absorption pipeline 22 to exchange heat with the inside of the heat exchange chamber 200 can be adjusted, so as to realize the adjustment of the heat exchange efficiency inside the heat exchange chamber 200.

[0035] Specifically, when the temperature inside the heat exchange chamber 200 is relatively high, the opening degree of the valve of the first switching valve 26 is reduced, so that more of the first medium flows into the first auxiliary heat absorption pipeline 22, which can improve the heat absorption efficiency inside the heat exchange chamber 200; when the temperature inside the heat exchange chamber 200 is relatively low, the opening degree of the valve of the first switching valve 26 is increased, so that less of the first medium flows into the first auxiliary heat absorption pipeline 22, which can reduce the heat absorption efficiency inside the heat exchange chamber 200.

[0036] Thus, the heat absorption efficiency of the first medium in the first heat exchange pipeline 20 on the inside of the heat exchange chamber 200 can vary with the temperature inside the heat exchange chamber 200. When the temperature inside the heat exchange chamber 200 rises, the heat absorption efficiency of the first medium in the first heat exchange pipeline 20 on the inside of the heat exchange chamber 200 correspondingly increases; when the temperature inside the heat exchange chamber 200 drops, the heat absorption efficiency of the first medium in the first heat exchange pipeline 20 on the inside of the heat exchange chamber 200 correspondingly decreases. It can be realized that when the flue gas inside the heat exchange chamber 200 is discharged, it can have a stable temperature, which is convenient for the subsequent treatment of the flue gas and improves the stability of the flue gas treatment effect.

[0037] At the same time, after the first medium is heated in the first main heat absorption pipeline 23 and the first auxiliary heat absorption pipeline 22 in sequence, it can flow to the first heat release pipeline 24 to transfer the heat inside the heat exchange chamber 200 to the heating air duct 12 to heat the cold air, so as to improve the utilization rate of the heat inside the heat exchange chamber 200. And the air preheater 10 is arranged outside the heat exchange chamber 200, which can reduce or avoid the influence of the flue gas on the reliability of the air preheater 10.

[0038] In addition, when it is necessary to heat the first medium, since the temperature of the flue gas inside the heat exchange chamber 200 is relatively high, the first medium can have a relatively high temperature after exchanging heat inside the heat exchange chamber 200. After the first medium flows out of the first heat exchange pipeline 20 from the first medium outlet 25, it can still have a relatively high temperature, so that the first medium is also heated after flowing into the first heat exchange pipeline 20, further improving the utilization rate of the heat inside the heat exchange chamber 200, realizing the saving of energy, and improving the environmental protection of the incinerator.

[0039] The heat exchange system 100 of the incinerator of the present application. All of the first medium flows through the first main heat absorption pipeline 23 to exchange heat with the inside of the heat exchange chamber 200, which can ensure the cooling effect on the flue gas in the heat exchange chamber 200. The first auxiliary heat exchange pipeline and the first switching valve 26 are arranged in parallel. By adjusting the switching valve, the flow rate of the first medium flowing through the first auxiliary heat absorption pipeline 22 to exchange heat with the inside of the heat exchange chamber 200 can be adjusted, so as to realize the adjustment of the heat exchange efficiency in the heat exchange chamber 200. The heat exchange efficiency of the first medium in the first heat exchange pipeline 20 with respect to the inside of the heat exchange chamber 200 can be adjusted corresponding to the temperature in the heat exchange chamber 200, so as to control the temperature of the flue gas discharged from the heat exchange chamber 200 to be stable. At the same time, the heat in the heat exchange chamber 200 can be transferred to the air preheater 10 to heat the cold air, and the heat in the heat exchange chamber 200 can also be used to heat the first medium itself, thereby improving the utilization rate of the heat in the heat exchange chamber 200, realizing the saving of energy, and improving the environmental protection performance of the incinerator.

[0040] Preferably, the first switching valve 26 is a solenoid valve, and the valve size of the first switching valve 26 is adjustable between open and closed.

[0041] In some embodiments, as Figure 1 shown, the first heat exchange pipeline 20 further includes a second switching valve 27, and the second switching valve 27 is arranged in parallel with the first heat release pipeline 24. When the second switching valve 27 is closed, all of the first medium flows into the first heat release pipeline 24, and all of the first medium heats the cold air in the heating air duct 12 in the first heat release pipeline 24; when the second switching valve 27 is open, the first medium is divided into the first heat release pipeline 24 and the second switching valve 27, that is, a part of the first medium flows into the first heat release pipeline 24, and the other part flows through the second switching valve 27 and does not flow through the first heat release pipeline 24. That is to say, by adjusting the opening and closing degree of the second switching valve 27, the flow rate of the first medium that exchanges heat in the first heat release pipeline 24 and the heating air duct 12 can be controlled, and the efficiency of the first medium flowing through the first heat release pipeline 24 to heat the cold air in the heating air duct 12 can be adjusted.

[0042] Thus, by adjusting the second switching valve 27, when the valve of the second switching valve 27 increases, the first medium flowing into the first heat release pipeline 24 can be reduced, and the heating effect on the cold air in the heating air duct 12 can be reduced; when the valve of the second switching valve 27 decreases, the first medium flowing into the first heat release pipeline 24 can be increased, and the heating effect on the cold air in the heating air duct 12 can be improved. Thus, the heating effect on the cold air in the heating air duct 12 can be adjusted, and the flexibility of the air preheater 10 to heat the cold air can be improved.

[0043] In some embodiments, as Figure 1As shown, the heat exchange system 100 further includes: a second heat exchange pipeline 30, which includes a second medium inlet 31, a second heat absorption pipeline 32, a second heat release pipeline 33, and a second medium outlet 34 that are connected in sequence. At least a part of the second heat absorption pipeline 32 is located in the heat exchange chamber 200 of the incinerator, and at least a part of the second heat release pipeline 33 is located in the heating air duct 12.

[0044] It can be understood that when the second medium flows from the second medium inlet 31 to the second heat absorption pipeline 32, it can exchange heat with the flue gas in the second heat absorption pipeline 32 and the heat exchange chamber 200, enabling the second medium to absorb the heat of the flue gas, heating the second medium while reducing the temperature of the flue gas. After the second medium heated in the second heat absorption pipeline 32 flows into the second heat release pipeline 33, the second heat release pipeline 33 can exchange heat with the cold air inlet in the heating channel, thereby heating the cold air and enabling the air preheater 10 to output hot air at the air outlet 13. It can be seen that the second heat exchange pipeline 30 can reduce the temperature of the flue gas, while increasing the temperature of the second medium and heating the cold air in the heating air duct 12.

[0045] Thus, by providing the first heat exchange pipeline 20 and the second heat exchange pipeline 30, the first medium and the second medium can be heated simultaneously, further improving the utilization rate of the heat in the heat exchange chamber 200.

[0046] Furthermore, the first medium is water and the second medium is steam. It can be understood that the temperature of the steam is higher than that of the water, and the temperature of the heat exchange chamber 200 gradually decreases in the flue gas flow direction.

[0047] Thus, in the flue gas flow direction in the heat exchange chamber 200 of the incinerator, the first main heat absorption pipeline 23 and the first auxiliary heat absorption pipeline 22 are located downstream of the second heat absorption pipeline 32, so that the temperature at the second heat absorption pipeline 32 in the heat exchange chamber 200 is higher than the temperature at the first main heat absorption pipeline 23 and the first auxiliary heat absorption pipeline, enabling the steam with a higher self-temperature to be heated at a higher temperature in the heat exchange chamber 200, ensuring the heating effect on the first medium and the second medium.

[0048] In this application, the first medium and the second medium are not limited to water and steam, as long as it is ensured that the self-temperature of the first medium is lower than the self-temperature of the second medium. For example, the first medium is water and the second medium is heat-conducting oil.

[0049] Meanwhile, in the air flow direction within the heating air duct 12, the first heat release pipeline 24 is located upstream of the second heat release pipeline 33. Since the temperature of the second medium is higher than that of the first medium, that is, the temperature of the second heat release pipeline 33 is higher than that of the first heat release pipeline 24. Thus, the cold air first passes through the heating of the first heat release pipeline 24 with a lower temperature of the first medium, and then passes through the heating of the second heat release pipeline 33 with a higher temperature of the second medium, which can ensure that the heat of the first medium can be fully utilized and improve the heating effect on the cold air.

[0050] In some embodiments, as Figure 2 shown, the second heat exchange pipeline 30 further includes a third switching valve 35, and the third switching valve 35 is connected in parallel with the second heat release pipeline 33.

[0051] It can be understood that when the third switching valve 35 is closed, all the second medium flows into the second heat release pipeline 33, and all the second medium heats the cold air in the heating air duct 12 in the second heat release pipeline 33; when the third switching valve 35 is opened, the second medium is split into the second heat release pipeline 33 and the third switching valve 35, that is, part of the second medium flows into the second heat release pipeline 33, and the other part flows through the third switching valve 35 and does not flow through the second heat release pipeline 33. That is to say, by adjusting the opening and closing degree of the third switching valve 35, the flow rate of the second medium that exchanges heat in the second heat release pipeline 33 and the heating air duct 12 can be controlled, and the heating efficiency of the second medium flowing through the second heat release pipeline 33 to heat the cold air in the heating air duct 12 can be adjusted.

[0052] Thus, by adjusting the third switching valve 35, when the valve of the third switching valve 35 increases, the second medium flowing into the second heat release pipeline 33 can be reduced, and the heating effect on the cold air in the heating air duct 12 can be reduced; when the valve of the third switching valve 35 decreases, the second medium flowing into the second heat release pipeline 33 can be increased, and the heating effect on the cold air in the heating air duct 12 can be improved. Thereby, the heating effect of the second heat exchange pipeline 30 on the cold air in the heating air duct 12 can be adjusted, and the flexibility of the air preheater 10 to heat the cold air can be further improved.

[0053] In some embodiments, as Figure 1 、 Figure 2 shown, the air preheater 10 further includes: an adjustable wind deflector 14, and the adjustable wind deflector 14 is arranged between the air inlet 11 and the heating air duct 12 to adjust the air volume entering the heating air duct 12. Thus, by adjusting the adjustable wind deflector 14, the air volume entering the heating air duct 12 can be adjusted. And when the cold air volume is different, the heating effect of the first medium on the cold air in the first heat release pipeline 24 is different, so as to realize the adjustment of the heating effect on the cold air and realize the control of the air volume and temperature of the air flowing out of the air preheater 10 at the air outlet 13.

[0054] Further, the air preheater 10 further includes: a cold air duct 15, which is in parallel with the heating duct 12. The cold air duct 15 has an air inlet end, and the air inlet end is located between the air inlet 11 and the adjustable wind deflector 14.

[0055] It can be understood that the cold air entering the air preheater 10 from the air inlet 11 is split between the cold air duct 15 and the heating duct 12, and the air volume entering the heating duct 12 can be adjusted by adjusting the adjustable wind deflector 14. When the air volume of the heating duct 12 increases, the air volume entering the cold air duct 15 decreases; when the air volume of the heating duct 12 decreases, the air volume entering the cold air duct 15 increases.

[0056] Thus, by adjusting the adjustable wind deflector 14, the ratio of the air volume heated in the heating duct 12 to the air volume entering the cold air duct 15 can be correspondingly adjusted, so that the airflows in the cold air duct 15 and the heating duct 12 can have different temperatures after confluence, thereby adjusting the temperature of the air discharged from the air preheater 10 through the air outlet 13, and further improving the usage flexibility of the air preheater 10.

[0057] In some embodiments, the air preheater 10 further includes: a driving fan, which drives the cold air to flow into the air inlet 11. Thus, it can be ensured that the cold air can stably flow into the heating duct 12 from the air inlet 11, and the stability of the air preheater 10 in heating the cold air and outputting the air current at the air outlet 13 is improved.

[0058] The incinerator according to the embodiment of the present invention includes the heat exchange system 100 of the incinerator in the above embodiment.

[0059] The incinerator of the present application, by adopting the heat exchange system 100 in the above embodiment, all the first medium flows through the first main heat absorption pipeline 23 for heat exchange in the heat exchange chamber 200, which can ensure the cooling effect on the flue gas in the heat exchange chamber 200. The first sub-heat exchange pipeline and the first switching valve 26 are arranged in parallel. By adjusting the switching valve, the flow rate of the first medium flowing through the first sub-heat absorption pipeline 22 for heat exchange in the heat exchange chamber 200 can be adjusted, so as to realize the adjustment of the heat exchange efficiency in the heat exchange chamber 200. The heat exchange efficiency of the first medium in the first heat exchange pipeline 20 for the heat exchange chamber 200 can be adjusted corresponding to the temperature in the heat exchange chamber 200, so as to control the flue gas in the heat exchange chamber 200 to have a stable temperature when discharged. At the same time, the heat in the heat exchange chamber 200 can be transmitted to the air preheater 10 to heat the cold air, and the heat in the heat exchange chamber 200 can also be used to heat the first medium itself, thereby improving the utilization rate of the heat in the heat exchange chamber 200, realizing the saving of energy, and improving the environmental protection of the incinerator.

[0060] In some embodiments, the incinerator has a combustion chamber, and the air outlet 13 communicates with the combustion chamber. Thus, the hot air heated by the air preheater 10 can be transported to the combustion chamber for use as combustion air, enabling part of the heat to form a cycle among the combustion chamber, the heat exchange chamber 200, the first heat exchange pipeline 20, and the air preheater 10, further improving the utilization rate of heat and the environmental friendliness of the incinerator.

[0061] The main advantage of the present invention is that it overcomes the drawback of traditional heat exchange equipment that the heat exchange capacity responds passively to fluctuations in the incoming flue gas temperature and the flue gas volume, and the discharged flue gas temperature fluctuates greatly. It can be controlled by adjusting the flow rates of heat exchange media in different directions with the goal of stabilizing the final exhaust gas temperature, fully achieving the purpose that no matter how the front end changes, the back end remains basically unchanged, and taking into account the contradiction between high energy efficiency at high loads and high emissions at low loads.

[0062] The heat exchange system 100 of the incinerator according to the embodiments of the present invention, as well as other components and operations of the incinerator, are known to those of ordinary skill in the art and will not be described in detail here.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0064] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0067] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without conflict, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0068] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat exchange system for an incinerator, characterized in that: include: An air preheater (10), the air preheater (10) having an air inlet (11), a heating air duct (12) and an air outlet (13) which are connected in sequence; A first heat exchange pipeline (20), the first heat exchange pipeline (20) comprising a first medium inlet (21), a first medium outlet (25), a first main heat absorption pipeline (23), a first auxiliary heat absorption pipeline (22) and a first heat release pipeline (24), the first main heat absorption pipeline (23) and the first auxiliary heat absorption pipeline (22) being at least partially located in the heat exchange chamber (200) of the incinerator, and the first heat release pipeline (24) being at least partially located in the heating air duct (12); The first medium inlet (21), the first main heat absorption pipeline (23), the first heat release pipeline (24) and the first medium outlet (25) are connected in sequence, and the first heat exchange pipeline (20) further comprises a first switch valve (26), and the first switch valve (26) is connected in parallel with the first auxiliary heat absorption pipeline (22); The first switch valve (26) is located between the first medium inlet (21) and the first main heat absorption pipeline (23), or the first switch valve (26) is located between the first main heat absorption pipeline (23) and the first heat release pipeline (24).

2. The heat exchange system of the incinerator according to claim 1, characterized in that: The first heat exchange pipeline (20) further comprises a second switch valve (27), and the second switch valve (27) is connected in parallel with the first heat release pipeline (24).

3. The heat exchange system of the incinerator according to claim 1, characterized in that: Also includes: A second heat exchange pipeline (30), the second heat exchange pipeline (30) comprises a second medium inlet (31), a second heat absorption pipeline (32), a second heat release pipeline (33) and a second medium outlet (34) which are connected in sequence, the second heat absorption pipeline (32) is at least partially located in the heat exchange chamber (200) of the incinerator, and the second heat release pipeline (33) is at least partially located in the heating air duct (12).

4. The heat exchange system of the incinerator according to claim 3, characterized in that: The first medium is water, and the second medium is steam; In the flue gas flow direction in the heat exchange chamber (200) of the incinerator, the first main heat absorption pipeline (23) and the first auxiliary heat absorption pipeline (22) are located downstream of the second heat absorption pipeline (32); In the flow direction of the airflow in the heating air duct (12), the first heat release pipeline (24) is located upstream of the second heat release pipeline (33).

5. The heat exchange system of the incinerator according to claim 3, characterized in that: The second heat exchange pipeline (30) further comprises a third switch valve (35), and the third switch valve (35) is connected in parallel with the second heat release pipeline (33).

6. The heat exchange system of an incinerator according to any one of claims 1 to 5, characterized in that: The air preheater (10) further comprises: an adjustable wind shield (14), wherein the adjustable wind shield (14) is arranged between the air inlet (11) and the heating air duct (12) to adjust the air volume entering the heating air duct (12).

7. The heat exchange system of the incinerator according to claim 6, characterized in that: The air preheater (10) further comprises: a cold air duct (15), the cold air duct (15) being connected in parallel with the heating air duct (12), the cold air duct (15) having an air inlet end, the air inlet end being located between the air inlet (11) and the adjustable wind shield (14).

8. The heat exchange system of an incinerator according to any one of claims 1 to 5, characterized in that: The air preheater (10) further comprises: a driving fan, wherein the driving fan drives cold air to flow into the air inlet (11).

9. An incinerator, characterized in that: A heat exchange system (100) comprising an incinerator according to any one of claims 1 to 8.

10. The incinerator according to claim 9, characterized in that: The incinerator has a combustion chamber, and the air outlet (13) is connected to the combustion chamber.

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