Flue gas waste heat utilization device

Abstract

The utility model provides a flue gas waste heat utilization device, and relates to the technical field of thermal power generation, the flue gas waste heat utilization device is characterized in that a first accommodating space and a second accommodating space are arranged in a heat exchange part, and the second accommodating space can conduct heat to the first accommodating space; the first end of the first pipeline is used for being communicated with outside air, and the second end of the first pipeline is connected and communicated with the first containing space. The first end of the second pipeline is used for being connected with a smoke outlet of the garbage incinerator body, and the second end of the second pipeline is connected and communicated with the second containing space; the garbage bin body is connected and communicated with the first containing space through a third pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to thermal power generation technical field especially is related to a flue gas waste heat utilization device. BACKGROUND

[0002] Garbage power generation refers to a kind of power generation form that through the special incineration boiler to burn municipal solid waste, and then through steam turbine generator set to generate electricity, and garbage power generation is divided into two categories of garbage incineration power generation and landfill gas power generation.

[0003] The traditional garbage bin heating is mostly in the mode of electric heating, and electric heating needs to consume a large amount of electric energy, which not only increases the operation cost of power plant, but also causes large energy loss in the process of electric heating due to more energy conversion links.

[0004] Therefore, the above technical problems need to be further solved. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a flue gas waste heat utilization device to alleviate the technical problems in the above related technologies.

[0006] The utility model provides a flue gas waste heat utilization device, comprising:

[0007] Heat exchange part, first containing space and second containing space are formed in the heat exchange part, and the second containing space can conduct heat to the first containing space;

[0008] First pipeline, the first end of the first pipeline is used to be connected with ambient air, and the second end of the first pipeline is connected with the first containing space and communicates;

[0009] Second pipeline, the first end of the second pipeline is used to be connected with the flue gas outlet of garbage incinerator body, and the second end of the second pipeline is connected with the second containing space and communicates;

[0010] Garbage bin body, the garbage bin body is connected with the first containing space by third pipeline and communicates.

[0011] The purpose of the present application and the technical problems thereof can also be further realized by the following technical measures.

[0012] Optionally, the flue gas waste heat utilization device, wherein further comprising:

[0013] Fourth pipeline, the first end of the fourth pipeline is connected with the second containing space and communicates, and the second end of the fourth pipeline is connected with the flue gas inlet of the garbage incinerator body.

[0014] Optionally, the flue gas waste heat utilization device, wherein the heat exchange part comprises:

[0015] a first shell, an inside of the first shell being hollow to form the first accommodating space, and the first shell having a first side and a second side opposite to each other and each having an opening communicating with the inside of the first shell;

[0016] a second shell, the second shell being sleeved on the two openings of the first shell and wrapping the first shell, and a sandwich layer between the first shell and the second shell forming the second accommodating space;

[0017] wherein the second end of the first pipeline is connected to and communicates with the opening of the first side of the first shell, the first end of the second pipeline and the first end of the fourth pipeline are respectively connected to and communicate with the sandwich layer, and the third pipeline is connected to and communicates with the opening of the second side of the first shell.

[0018] Optionally, the flue gas waste heat utilization device, further comprising:

[0019] a plurality of fins, each of the fins having a hollowed part in the middle, and the plurality of fins being arranged on the first shell in the direction from the first side to the second side of the first shell;

[0020] wherein the inner circumferential side of each of the fins is located in the first shell, and the outer circumferential side of each of the fins is located in the sandwich layer.

[0021] Optionally, the flue gas waste heat utilization device, further comprising:

[0022] a plurality of fifth pipelines, each of the first ends of the fifth pipelines being connected to and communicating with the fourth pipeline, and each of the second ends of the fifth pipelines being connected to and communicating with different parts of the garbage bin body.

[0023] Optionally, the flue gas waste heat utilization device, further comprising:

[0024] a first air extractor arranged on the first pipeline;

[0025] a second air extractor arranged on the second pipeline.

[0026] Optionally, the flue gas waste heat utilization device, further comprising:

[0027] a temperature sensor, the temperature sensor being arranged on each of the first pipeline, the second pipeline, the third pipeline and the fifth pipelines.

[0028] Optionally, the flue gas waste heat utilization device, further comprising:

[0029] a first valve, the first valve being arranged on each of the first pipeline and the fourth pipeline.

[0030] A second valve is arranged on the second pipeline, the third pipeline and each fifth pipeline.

[0031] Optionally, the flue gas waste heat utilization device further comprises:

[0032] An air filter is arranged on the first pipeline.

[0033] Optionally, the flue gas waste heat utilization device further comprises:

[0034] A dust removal port is arranged on the second pipeline.

[0035] By means of the above technical scheme, the flue gas waste heat utilization device has at least the following advantages:

[0036] The flue gas waste heat utilization device provided by the embodiment of the present application passes the flue gas with a large amount of heat generated in the waste incinerator body into the heat exchange part, so that the heat exchange part exchanges heat with the large amount of flue gas passed into the heat exchange part and the external air, that is, the second containing space of the heat exchange part heats the first containing space, and the heated air enters the waste bin body and heats the inside of the waste bin body, so as to solve the problems of high operation cost and large energy loss in the energy conversion process in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical scheme in the specific embodiment or related technology of the present application, the drawings needed to be used in the specific embodiment or related technology description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0038] Figure 1 The first perspective view of the heat exchange part of the flue gas waste heat utilization device provided by the embodiment of the present application is shown in the structural schematic view.

[0039] Figure 2 The second perspective view of the heat exchange part of the flue gas waste heat utilization device provided by the embodiment of the present application is shown in the structural schematic view.

[0040] Figure 3 The structure schematic view of the exhaust pipe mode of the waste bin body of the flue gas waste heat utilization device provided by the embodiment of the present application is shown in the structural schematic view.

[0041] Icon:

[0042] 1, heat exchange part; 101, first shell; 102, second shell;

[0043] 2, first pipeline; 3, second pipeline; 4, garbage bin body; 5, third pipeline; 6, fourth pipeline; 7, fin; 8, fifth pipeline; 9, first air extractor; 10, second air extractor; 11, temperature sensor; 12, first valve; 13, second valve; 14, air filter; 15, ash removal port. DETAILED DESCRIPTION

[0044] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0045] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Embodiments

[0048] As Figure 1 The flue gas waste heat utilization device according to the embodiments of the present application includes:

[0049] The heat exchange part 1 has a first containing space and a second containing space inside, and the second containing space can conduct heat to the first containing space;

[0050] The first pipeline 2 has a first end for communicating with the outside air, and a second end connected and communicated with the first containing space;

[0051] A second pipeline 3, a first end of the second pipeline 3 is used for connecting with the flue gas outlet of the garbage incinerator body, and a second end of the second pipeline 3 is connected and communicated with the second containing space;

[0052] A garbage bin body 4, the garbage bin body 4 is connected and communicated with the first containing space through a third pipeline 5.

[0053] Specifically, with the increasing amount of municipal solid waste, garbage incineration power generation has become an important way of garbage disposal and energy recovery. In a garbage incineration power plant, a large amount of high-temperature flue gas is generated during the incineration of garbage in the furnace. Generally, these flue gases need to be treated by a series of purification measures to meet the environmental emission standards before being discharged. The traditional garbage bin heating is usually by electric heating. Since electric heating consumes a large amount of electric energy, it not only increases the operating cost of the power plant, but also causes a large energy loss in the energy conversion process. However, since the flue gas itself carries a large amount of heat, the present application utilizes this part of heat to heat the garbage bin, which not only reduces the cost, but also improves the energy utilization rate, thereby solving the problems of high operating cost and large energy loss in the energy conversion process in the prior art.

[0054] The first pipeline 2 can introduce air from the outside into the first containing space of the heat exchange part 1, and the first containing space of the heat exchange part 1 is used for containing the air from the outside into the heat exchange part 1. The first pipeline 2 can be made of high-temperature-resistant and corrosion-resistant alloy steel, such as 316L stainless steel, to ensure that the structure remains intact and sealed under long-term high-temperature flue gas erosion.

[0055] The second pipeline 3 and the third pipeline 5 are both glass steel pipes, which have certain strength and corrosion resistance, and relatively low cost. The second pipeline 3 is connected and communicated with the flue gas outlet of the garbage incinerator body and the second containing space, respectively. The second pipeline 3 is used to introduce the flue gas carrying a large amount of heat from the garbage incinerator body into the second containing space, and the second containing space is used to store the flue gas carrying a large amount of heat introduced from the garbage incinerator body.

[0056] The second containing space conducts heat to the first containing space to heat the air in the first containing space, and then sends the heated air to the garbage bin body 4 through the third pipeline 5 to heat the garbage bin body 4.

[0057] It should be noted that there are two ways to introduce flue gas into the second space. The first is that after the flue gas carrying a large amount of heat fills the second space, the flow of flue gas into the second space can be blocked. If the flue gas in the second space is insufficient to transfer heat to the outside air in the first space, the technicians can collect the existing flue gas in the second space and then introduce new flue gas carrying a large amount of heat to fill the second space. The second method is to continuously supply flue gas carrying a large amount of heat into the second space through the second pipe 3, and then collect the flue gas in the second space through other structures. This method can also achieve the effect of heat transfer from the second space to the outside air in the first space.

[0058] In addition, the waste storage unit 4 is an important component of the municipal solid waste incineration power plant, mainly used for storing and fermenting municipal solid waste. The waste incinerator unit is a municipal solid waste incinerator, which is the equipment for incinerating municipal solid waste. The municipal solid waste is burned in the furnace and turned into exhaust gas that enters the secondary combustion chamber. It integrates automatic feeding, screening, drying, incineration, ash removal, dust removal, and automatic control. It adopts new technologies such as high-temperature combustion, secondary oxygenation, and automatic ash discharge to meet the monitoring requirements for wastewater discharge.

[0059] The waste heat recovery device provided in this embodiment of the utility model introduces the flue gas carrying a large amount of heat generated in the waste incinerator body into the heat exchange section 1, so that the heat exchange section 1 exchanges heat with the large amount of heat flue gas and the outside air. That is, the heat is transferred to the first containment space through the second containment space of the heat exchange section 1. The air that has absorbed the heat enters the waste bin body 4 and heats the inside of the waste bin body 4, so as to solve the problems of high operating costs and large energy loss in the energy conversion process of electric heating in the prior art.

[0060] like Figure 1 As shown, in specific implementation, it also includes:

[0061] The fourth pipe 6 has its first end connected to and communicates with the second accommodating space, and its second end is connected to the flue gas inlet of the waste incinerator body.

[0062] Specifically, in order to avoid energy loss during the heat exchange process, this application provides a method for introducing flue gas into the second containment space, that is, connecting the second containment space to the flue gas inlet of the waste incinerator body through the fourth pipe 6.

[0063] Since the waste incinerator body is existing technology, it has a system that works in conjunction with it. In this application, the first end of the second pipe 3 is connected to the system to draw out the flue gas in the waste incinerator body and pass it into the second containment space. Then, the flue gas entering the second containment space is drawn out through the fourth pipe 6 and connected to the system so that the drawn-out flue gas can return to the waste incinerator body for combustion. This structural design can effectively avoid energy loss during the heat exchange process, and can also effectively control the temperature in the second containment space, making it convenient for technicians to transfer heat to the air in the first containment space through the second containment space.

[0064] The above connection methods all use conventional methods. The specific connection methods are known to technical personnel and will not be described in detail here.

[0065] In addition, the second end of the second pipe 3 and the first end of the fourth pipe 6 are located on opposite sides of the second containment space. This structural design facilitates the transfer of heat between the air in the first containment space and the second containment space by technicians.

[0066] like Figure 1 - Figure 2 As shown, in a specific implementation, the heat exchange unit 1 includes:

[0067] The first housing 101 has a hollow interior forming the first accommodating space, and both the first and second sides opposite to the first housing 101 have openings communicating with their interiors.

[0068] The second housing 102 is fitted onto the two openings of the first housing 101 and wraps around the first housing 101. The interlayer between the second housing 102 and the first housing 101 forms the second accommodating space.

[0069] The second end of the first pipe 2 is connected to and communicates with the opening on the first side of the first housing 101, the first end of the second pipe 3 and the first end of the fourth pipe 6 are respectively connected to and communicate with the interlayer, and the third pipe 5 is connected to and communicates with the opening on the second side of the first housing 101.

[0070] Specifically, this application provides an embodiment of a heat exchange section 1, wherein the heat exchange section 1 includes a first housing 101 and a second housing 102.

[0071] The first shell 101 is hollow inside, and opposite sides have openings communicating with the inside, the second shell 102 is sleeved on the two openings and wraps the first shell 101, and the two openings are located outside the second shell 102, wherein the two openings of the first shell 101 can support the first shell 101, and the second shell 102 and the first shell 101 have a sandwich layer to form a second containing space, and the inside of the first shell 101 forms a first containing space.

[0072] The first pipeline 2 introduces air from the outside into the first containing space through the first side opening of the first shell 101, and the air in the first containing space is introduced into the inside of the garbage bin body 4 through the cooperation of the second side opening of the first shell 101 and the third pipeline 5, so as to heat the inside of the garbage bin body 4.

[0073] A sealing structure is arranged between the second shell 102 and the first shell 101, for example, a device capable of achieving the sealing effect of the second containing space, such as filling sealant or sealing pad, the second shell 102 and the first shell 101 can be connected in a detachable manner, or can be connected in a fixed manner, in order to improve the use effect of the device, the second shell 102 and the first shell 101 of the application are preferably connected in a detachable manner, for example, bolt connection, this structure design can facilitate the later maintenance of the technician.

[0074] The first shell 101 and the second shell 102 are connected along the vertical direction of the cross section of the first shell 101 and the second shell 102. Figure 1 The shape of the cross section in the vertical direction can be circular, rectangular, triangular, polygonal (pentagonal and more than pentagonal) or irregular, as long as it can form two sleeved containing spaces.

[0075] The first shell 101 and the second shell 102 can be made of carbon steel, and the inner wall of the first shell 101 in contact with air, the outer wall of the first shell 101 in contact with flue gas and the inner wall of the second shell 102 in contact with flue gas all have a corrosion-resistant layer.

[0076] As shown in the specific implementation, it further includes: Figure 1 - Figure 2 As shown in the specific implementation, it further includes:

[0077] A plurality of fins 7, each of the fins 7 has a hollow in the middle, and a plurality of the fins 7 are arranged on the first shell 101 in the direction from the first side to the second side of the first shell 101.

[0078] Wherein, the inner circumferential side of each fin 7 is located in the first shell 101, and the outer circumferential side of each fin 7 is located in the sandwich layer.

[0079] Specifically, in order to improve the heat transfer rate from the second containing space to the first containing space in the present application, a plurality of fins 7 are arranged on the first containing space, the plurality of fins 7 are arranged on the first shell 101 in the direction from the first side to the second side of the first shell 101, the central part of each fin 7 is hollow, the hollow of each fin 7 is located in the first containing space, and the outer peripheral side of each fin 7 is located in the second containing space. By arranging a plurality of fins 7, the heat transfer rate from the second containing space to the first containing space can be effectively improved.

[0080] The fin 7 and the first shell 101 can be an integral structure or a split structure. In order to improve the air tightness in the first containing space in the present application, the fin 7 and the first shell 101 are preferably integrally formed by casting. The surface of the fin 7 has a corrosion-resistant layer.

[0081] As shown in Figure 3 , in specific implementation, it further includes:

[0082] A plurality of fifth pipelines 8, the first end of each fifth pipeline 8 is connected and communicated with the fourth pipeline 6, and the second end of each fifth pipeline 8 is respectively connected and communicated with different parts of the garbage bin body 4.

[0083] Specifically, the third pipeline 5 is a main pipeline, and the plurality of fifth pipelines 8 are branch pipelines. The third pipeline 5 is connected and communicated with the plurality of branch pipelines and different parts of the garbage bin body 4 through the connecting pipe and the connecting pipe fitting. This structure design can facilitate to meet the temperature requirements of different parts of the garbage bin body 4. The number of branch pipelines can be selected according to actual needs, and the present application is not limited. The connecting pipe fitting is at least one of a two-way connecting pipe fitting, a three-way connecting pipe fitting, and a four-way connecting pipe fitting. The connecting pipe is a pipe fitting with communicating ports at opposite ends, which is a prior art and can be obtained by purchase.

[0084] As shown in Figure 1 , in specific implementation, it further includes:

[0085] A first air extractor 9 is arranged on the first pipeline 2.

[0086] A second air extractor 10 is arranged on the second pipeline 3.

[0087] Specifically, the arrangement of the first air extractor 9 can improve the air intake efficiency of the air into the heat exchange part 1. The arrangement of the second air extractor 10 can improve the air intake efficiency of the flue gas into the heat exchange part 1. The first air extractor 9 and the second air extractor 10 are air extractors with the same structure, which can be obtained by purchase.

[0088] As Figure 1 and Figure 3 shown in the specific implementation, wherein further comprising:

[0089] temperature sensors 11, the first pipeline 2, the second pipeline 3, the third pipeline 5 and each of the fifth pipeline 8 are provided with the temperature sensors 11.

[0090] Specifically, the temperature sensors 11 are used for monitoring the real-time temperature. The temperature sensors 11 on the first pipeline 2 are used for monitoring the real-time temperature of the air before entering the heat exchange part 1. The temperature sensors 11 on the second pipeline 3 are used for monitoring the real-time temperature of the flue gas before entering the heat exchange part 1.

[0091] The temperature sensors 11 on the third pipeline 5 are used for monitoring the real-time temperature of the air after heat exchange.

[0092] The temperature sensors 11 on the fifth pipeline 8 are used for monitoring the real-time temperature of the air after heat exchange.

[0093] As Figure 1 and Figure 3 shown in the specific implementation, wherein further comprising:

[0094] The first valve 12, the first pipeline 2 and the fourth pipeline 6 are provided with the first valve 12.

[0095] The second valve 13, the second pipeline 3, the third pipeline 5 and each of the fifth pipeline 8 are provided with the second valve 13.

[0096] Specifically, the first valve 12 on the first pipeline 2 can control whether the first containing space is communicated with the air outside. The first valve 12 on the fourth pipeline 6 can control whether the second containing space is communicated with the outside.

[0097] The second valve 13 on the second pipeline 3 can control whether the flue gas enters the second containing space, and the second valve 13 can also change the air intake amount of the flue gas into the second containing space at any time, in addition, by changing the air intake amount of the flue gas into the second containing space at any time, to realize the adjustment of the temperature in the second containing space.

[0098] The second valve 13 on the third pipeline 5 can control whether the air after heat exchange enters the garbage bin, and the second valve 13 can also change the air intake amount of the air after heat exchange into the garbage bin at any time, in addition, by changing the air intake amount of the air after heat exchange into the garbage bin at any time, to realize the adjustment of the temperature of the connected area in the garbage bin.

[0099] The second valve 13 on the fifth pipeline 8 can control whether the heat-exchanged air enters the garbage bin, and the second valve 13 can change the air intake of the heat-exchanged air into the garbage bin at any time, and in addition, the air intake of the heat-exchanged air into the garbage bin is changed at any time to realize the temperature adjustment of the area connected to the garbage bin.

[0100] The first valve 12 is a stop valve, which can be purchased. The second valve 13 is a ball valve, which can be purchased.

[0101] As shown in the specific implementation, it further includes: Figure 1

[0102] The air filter 14 is arranged on the first pipeline 2.

[0103] Specifically, the air filter 14 is used to remove dust, impurities and the like in the air to avoid the accumulation of dust, impurities and the like in the heat exchanger to affect the heat exchange efficiency and air quality.

[0104] As shown in the specific implementation, it further includes: Figure 1

[0105] The dust removal port 15 is arranged on the second pipeline 3.

[0106] Specifically, since the flue gas contains dust and impurities, the dust and impurities are easy to adhere to the pipe wall during the transmission process to cause the phenomenon of pipeline blockage. The dust removal port 15 is used for regular cleaning to prevent the phenomenon of pipeline blockage.

[0107] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.​​

Claims

1. A flue gas waste heat utilization device, characterized by, The application relates to a heat exchange device for a waste incinerator. The heat exchange device comprises: a heat exchange part, which has a first containing space and a second containing space, and the second containing space can conduct heat to the first containing space; a first pipeline, a first end of the first pipeline being used for communicating with external air, and a second end of the first pipeline being connected with the first containing space; a second pipeline, a first end of the second pipeline being used for connecting with a flue gas outlet of a waste incinerator body, and a second end of the second pipeline being connected with the second containing space; 2. The flue gas waste heat utilization device according to claim 1, characterized in that, a waste bin body, which is connected with the first containing space through a third pipeline. The application further comprises:

3. The flue gas waste heat utilization device according to claim 2, characterized in that, a fourth pipeline, a first end of the fourth pipeline being connected with the second containing space, and a second end of the fourth pipeline being used for connecting with a flue gas inlet of the waste incinerator body. The heat exchange part comprises: a first shell, an inside of the first shell being hollow to form the first containing space, and a first side and a second side of the first shell being opposite to each other and having openings communicating with the inside of the first shell; a second shell, which is sleeved on the two openings of the first shell and wraps the first shell, and a layer between the first shell and the second shell forming the second containing space; 4. The flue gas waste heat utilization device according to claim 3, characterized in that, wherein the second end of the first pipeline is connected with the opening of the first side of the first shell, the first end of the second pipeline and the first end of the fourth pipeline are respectively connected with the layer, and the third pipeline is connected with the opening of the second side of the first shell. The application further comprises: a plurality of fins, each of the fins having a hollow part in the middle, and the plurality of fins being arranged on the first shell in the direction from the first side to the second side of the first shell; 5. The flue gas waste heat utilization device according to claim 2, characterized in that, wherein the inner circumferential side of each of the fins is located in the first shell, and the outer circumferential side of each of the fins is located in the layer. The application further comprises:

6. The flue gas waste heat utilization device according to claim 1, characterized in that, a plurality of fifth pipelines, a first end of each of the fifth pipelines being connected with the fourth pipeline, and a second end of each of the fifth pipelines being connected with different parts of the waste bin body. The application further comprises: a first air extractor arranged on the first pipeline; 7. The flue gas waste heat utilization device according to claim 5, characterized in that, a second air extractor arranged on the second pipeline. The application further comprises:

8. The flue gas waste heat utilization device according to claim 5, characterized in that, a temperature sensor arranged on the first pipeline, the second pipeline, the third pipeline and each of the fifth pipelines. The application further comprises: a first valve arranged on the first pipeline and the fourth pipeline; 9. The flue gas waste heat utilization device according to claim 1, characterized in that, a second valve arranged on the second pipeline, the third pipeline and each of the fifth pipelines. The application further comprises:

10. The flue gas waste heat utilization device according to claim 1, characterized in that, an air filter arranged on the first pipeline. The application further comprises: an ash cleaning port arranged on the second pipeline.

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