Evaporator for low-temperature waste heat power generation

Abstract

The utility model provides an evaporator for low-temperature waste heat power generation, which comprises an evaporator shell, a heat exchange pipeline, a flue gas input pipeline, a flue gas discharge pipeline and a flue gas filtering mechanism, the heat exchange pipeline is arranged in the evaporator shell, the flue gas input pipeline is connected with an inlet of the flue gas filtering mechanism, and the flue gas discharge pipeline is connected with an outlet of the flue gas filtering mechanism. An outlet of the smoke filtering mechanism communicates with the left side of the evaporator shell, and the smoke discharging pipeline communicates with the right side of the evaporator shell. The smoke filtering mechanism comprises a filtering mechanism shell, and a dust filtering net, an activated carbon filtering net and an HEPA filtering net are arranged in the filtering mechanism shell from left to right. According to the evaporator for low-temperature waste heat power generation, waste smoke can be filtered before being conveyed into the evaporator shell, damage to internal components of the evaporator caused by the waste smoke is avoided, and the service life of the evaporator is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporators, in particular to an evaporator for low-temperature waste heat power generation. Background Art

[0002] In the industrial production process, industrial heat sources with waste heat are generated, such as waste water, waste flue gas, etc. For this part of industrial heat sources, they can be used for power generation in a low-temperature waste heat power generation system. For example, the waste flue gas generated in the industrial production process can be used to exchange heat with the low-temperature waste heat of the waste flue gas in the evaporator in the low-temperature waste heat power generation system. Since the waste flue gas not only contains more impurities but also contains a certain amount of harmful gases, if the waste flue gas is directly transported to the evaporator for heat exchange without treatment, it is easy to damage the internal components of the evaporator and shorten the service life of the evaporator. Content of the Utility Model

[0003] The purpose of the utility model is to provide an evaporator for low-temperature waste heat power generation, which can solve the problem that the existing waste flue gas is directly introduced into the evaporator, damaging the internal components of the evaporator and shortening the service life.

[0004] The utility model provides an evaporator for low-temperature waste heat power generation, which includes an evaporator shell, a heat exchange pipe, a flue gas input pipe, a flue gas discharge pipe and a flue gas filtering mechanism. The heat exchange pipe is arranged in the evaporator shell. The flue gas input pipe is connected to the inlet of the flue gas filtering mechanism. The outlet of the flue gas filtering mechanism is communicated with the left side of the evaporator shell. The flue gas discharge pipe is communicated with the right side of the evaporator shell. The flue gas filtering mechanism includes a filtering mechanism shell, and a dust filter screen, an activated carbon filter screen and a HEPA filter screen are respectively arranged in the filtering mechanism shell from left to right.

[0005] According to the evaporator for low-temperature waste heat power generation provided by the utility model, an adsorbent is further arranged in the filtering mechanism shell. The adsorbent includes a cylindrical shell and flue gas desulfurization particles filled in the cylindrical shell. Mesh baffles are respectively arranged at the left and right ends of the cylindrical shell.

[0006] According to the evaporator for low-temperature waste heat power generation provided by the utility model, the adsorbent is detachably loaded into the filtering mechanism shell through the first end of the filtering mechanism shell, and a limiting platform for restricting the loading position of the adsorbent is arranged on the inner side wall of the filtering mechanism shell.

[0007] According to the evaporator for low-temperature waste heat power generation provided by the utility model, an installation flange is arranged on the outer side wall of the first end of the filtering mechanism shell, and the filtering mechanism shell is connected to the evaporator shell through the installation flange.

[0008] According to an evaporator for low-temperature waste heat power generation provided by the present utility model, a connector is provided at the second end of the filter mechanism housing, and the filter mechanism housing is connected to the flue gas input pipe through the connector.

[0009] According to an evaporator for low-temperature waste heat power generation provided by the present utility model, the heat exchange pipes are arranged in a serpentine bend in the evaporator housing, and a plurality of fins are provided on the heat exchange pipes, and the plurality of fins are arranged at intervals in sequence along the length direction of the heat exchange pipes.

[0010] According to an evaporator for low-temperature waste heat power generation provided by the present utility model, the inlet of the heat exchange pipe is connected to one end of the first connecting pipe, and the other end of the first connecting pipe passes through the side wall of the evaporator housing and is arranged outside the evaporator housing.

[0011] According to an evaporator for low-temperature waste heat power generation provided by the present utility model, a first control valve is provided on the first connecting pipe.

[0012] According to an evaporator for low-temperature waste heat power generation provided by the present utility model, the outlet of the heat exchange pipe is connected to one end of the second connecting pipe, and the other end of the second connecting pipe passes through the side wall of the evaporator housing and is arranged outside the evaporator housing.

[0013] According to an evaporator for low-temperature waste heat power generation provided by the present utility model, a second control valve is provided on the second connecting pipe.

[0014] The evaporator for low-temperature waste heat power generation provided by the utility model arranges the heat exchange pipes inside the evaporator housing, connects the flue gas input pipe to the inlet of the flue gas filtering mechanism, connects the outlet of the flue gas filtering mechanism to the left side of the evaporator housing, and connects the flue gas discharge pipe to the right side of the evaporator housing. Among them, the flue gas input pipe is used to transport waste flue gas to the flue gas filtering mechanism, and the flue gas filtering mechanism is used to filter the waste flue gas before it enters the evaporator housing. The waste flue gas after filtration is input into the evaporator housing, and the waste flue gas exchanges heat with the working medium in the heat exchange pipes. The waste flue gas after heat exchange is discharged outwards through the flue gas discharge pipe. Among them, the flue gas filtering mechanism includes a filtering mechanism housing, in which a dust filter screen, an activated carbon filter screen, and a HEPA filter screen are arranged from left to right. The waste flue gas is sequentially processed through the dust filter screen, the activated carbon filter screen, and the HEPA filter screen. Through the dust filter screen, the dust particles in the flue gas can be effectively adsorbed. Through the activated carbon filter screen, harmful gases such as benzene, toluene, xylene, and carbon tetrachloride in the flue gas can be adsorbed. Through the HEPA filter screen, the fine particles in the flue gas can be effectively adsorbed, and the purification efficiency is better. Thus, the evaporator for low-temperature waste heat power generation provided by the utility model can pre-filter the waste flue gas transported into the evaporator housing during the heat exchange process, effectively filter out the solid impurities and harmful gases in the flue gas, avoid damage to the heat exchange pipes in the evaporator housing caused by the waste flue gas, effectively improve the service life of the evaporator, and ensure the efficient heat exchange work of the evaporator. Brief Description of the Drawings

[0015] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the evaporator for low-temperature waste heat power generation of the present utility model;

[0017] Figure 2 It is a schematic structural diagram of the flue gas filtering mechanism in the evaporator for low-temperature waste heat power generation of the present utility model;

[0018] Figure 3 It is a schematic structural diagram of the adsorbent in the evaporator for low-temperature waste heat power generation of the present utility model.

[0019] Explanation of the Reference Numerals:

[0020] 1. Evaporator housing; 2. Heat exchange pipe; 3. Flue gas input pipe; 4. Flue gas discharge pipe;

[0021] 5. Flue gas filtering mechanism; 501. Filtering mechanism housing; 502. Dust filter screen; 503. Activated carbon filter screen; 504. HEPA filter screen; 505. Adsorbent; 506. Limiting platform; 507. First mounting flange; 508. Connector; 5051. Cylindrical housing; 5052. Flue gas desulfurization particles; 5053. Mesh baffle

[0022] 6. Fins; 7. First connecting pipe; 8. First control valve; 9. Second connecting pipe; 10. Second control valve Specific embodiments

[0023] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 thus cannot be understood as a limitation to the present utility model

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations

[0026] As Figures 1 to 3As shown in the figure, the evaporator for low-temperature waste heat power generation according to the embodiment of the present utility model includes an evaporator housing 1, a heat exchange pipe 2, a flue gas input pipe 3, a flue gas discharge pipe 4, and a flue gas filtration mechanism 5. The heat exchange pipe 2 is arranged inside the evaporator housing 1. The flue gas input pipe 3 is connected to the inlet of the flue gas filtration mechanism 5. The outlet of the flue gas filtration mechanism 5 is communicated with the left side of the evaporator housing 1. The flue gas discharge pipe 4 is communicated with the right side of the evaporator housing 1. The flue gas input pipe 3 is used to convey waste flue gas to the flue gas filtration mechanism 5. The flue gas filtration mechanism 5 is used to filter the waste flue gas before it enters the evaporator housing 1. The waste flue gas after filtration is input into the evaporator housing 1, and the waste flue gas exchanges heat with the working medium in the heat exchange pipe 2. The waste flue gas after heat exchange is discharged outwards through the flue gas discharge pipe 4.

[0027] Among them, the flue gas filtration mechanism 5 includes a filtration mechanism housing 501. Inside the filtration mechanism housing 501, a dust filter screen 502, an activated carbon filter screen 503, and a HEPA filter screen 504 are respectively arranged from left to right. The waste flue gas is sequentially processed through the dust filter screen 502, the activated carbon filter screen 503, and the HEPA filter screen 504. Through the dust filter screen 502, the dust particles in the flue gas can be effectively adsorbed. Through the activated carbon filter screen 503, harmful gases such as benzene, toluene, xylene, and carbon tetrachloride in the flue gas can be adsorbed. Through the HEPA filter screen 504, the fine particles in the flue gas can be effectively adsorbed, and the purification efficiency is better.

[0028] Therefore, the evaporator for low-temperature waste heat power generation according to the embodiment of the present utility model can pre-filter the waste flue gas conveyed into the evaporator housing 1 during the heat exchange process, effectively filter out the solid impurities and harmful gases in the flue gas, avoid damage to the heat exchange pipe 2 inside the evaporator housing 1 caused by the waste flue gas entering, effectively improve the service life of the evaporator, and ensure the efficient heat exchange work of the evaporator.

[0029] In some embodiments of the present utility model, for the waste flue gas generated by coal combustion, an adsorbent 505 can also be arranged inside the filtration mechanism housing 501. The adsorbent 505 is arranged on the right side of the HEPA filter screen 504. The adsorbent 505 includes a cylindrical housing 5051 and flue gas desulfurization particles 5052 filled in the cylindrical housing 5051. Mesh baffles 5053 are respectively arranged at the left and right ends of the cylindrical housing 5051. By arranging the adsorbent 505 inside the filtration mechanism housing 501, the waste flue gas can be adsorbed and desulfurized, further reducing the pollution of the atmosphere after the waste flue gas is discharged.

[0030] Among them, the adsorbent 505 is detachably inserted into the filter mechanism housing 501 through the first end of the filter mechanism housing 501, and a limiting platform 506 for restricting the installation position of the adsorbent 505 is provided on the inner side wall of the filter mechanism housing 501. That is to say, when the adsorbent 505 is used for a period of time, it can be replaced to ensure the adsorption and desulfurization effect of the adsorbent 505 on the waste flue gas.

[0031] Similarly, the dust filter net 502, the activated carbon filter net 503, and the HEPA filter net 504 are respectively detachably installed in the filter mechanism housing 501 for easy maintenance and replacement.

[0032] Specifically, the filter mechanism housing 501 can be composed of two mutually buckled semi-cylindrical cavities, and the two semi-cylindrical cavities are hermetically connected by a clamp, so as to facilitate the maintenance and replacement of the components inside the filter mechanism housing 501.

[0033] Specifically, a first mounting flange 507 is provided on the outer side wall of the first end of the filter mechanism housing 501, and the filter mechanism housing 501 is connected to the evaporator housing 1 through the first mounting flange 507, so as to realize the reliable connection and installation between the flue gas filtering mechanism 5 and the evaporator housing 1.

[0034] Specifically, a connector 508 is provided at the second end of the filter mechanism housing 501, and the filter mechanism housing 501 is connected to the flue gas input pipe 3 through the connector 508, so as to realize the reliable connection and installation between the flue gas filtering mechanism 5 and the flue gas input pipe 3. Among them, the connector 508 can adopt a pipe connector with an existing structure.

[0035] Specifically, the flue gas discharge pipe 4 can be connected to the evaporator housing 1 through a second connection flange, so as to realize the reliable connection and installation between the flue gas discharge pipe 4 and the evaporator housing 1.

[0036] In some embodiments of the present utility model, the heat exchange pipe 2 is arranged in a serpentine shape in the evaporator housing 1, and a plurality of fins 6 are provided on the heat exchange pipe 2, and the plurality of fins 6 are arranged at intervals in sequence along the length direction of the heat exchange pipe 2, so as to improve the heat exchange efficiency with the waste flue gas.

[0037] In some embodiments of the present utility model, the inlet of the heat exchange pipe 2 is connected to one end of the first connecting pipe 7, and the other end of the first connecting pipe 7 passes through the side wall of the evaporator housing 1 and is arranged outside the evaporator housing 1. Among them, a first control valve 8 is provided on the first connecting pipe 7. The heat exchange working medium enters the heat exchange pipe 2 through the first connecting pipe 7, and the input state of the heat exchange working medium can be controlled through the first control valve 8.

[0038] Among them, the outlet of the heat exchange pipe 2 is connected to one end of the second connecting pipe 9, and the other end of the second connecting pipe 9 passes through the side wall of the evaporator housing 1 and is arranged outside the evaporator housing 1. Among them, a second control valve 10 is provided on the second connecting pipe 9. The heat exchange working medium is output from the heat exchange pipe 2 through the second connecting pipe 9, and the output state of the heat exchange working medium can be controlled through the second control valve 10.

[0039] Among them, according to actual usage requirements, a plurality of heat exchange pipes 2 can be arranged in the evaporator housing 1. The inlets of the heat exchange pipes 2 are all connected to the first connecting pipe 7, and the outlets of the heat exchange pipes 2 are all connected to the second connecting pipe 9, so as to maximize the overall heat exchange efficiency of the evaporator.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An evaporator for low-temperature waste heat power generation, characterized in that, It includes an evaporator housing, heat exchange pipes, a flue gas input pipe, a flue gas discharge pipe, and a flue gas filtering mechanism. The heat exchange pipes are arranged inside the evaporator housing. The flue gas input pipe is connected to the inlet of the flue gas filtering mechanism. The outlet of the flue gas filtering mechanism is communicated with the left side of the evaporator housing. The flue gas discharge pipe is communicated with the right side of the evaporator housing. The flue gas filtering mechanism includes a filtering mechanism housing. Inside the filtering mechanism housing, there are respectively provided a dust filter screen, an activated carbon filter screen, and a HEPA filter screen from left to right.

2. The evaporator for low-temperature waste heat power generation according to claim 1, wherein An adsorbent is further provided inside the filtering mechanism housing. The adsorbent includes a cylindrical housing and flue gas desulfurization particles filled inside the cylindrical housing. Mesh baffles are respectively provided at the left and right ends of the cylindrical housing.

3. The evaporator for low-temperature waste heat power generation according to claim 2, wherein The adsorbent is detachably inserted into the filtering mechanism housing through the first end of the filtering mechanism housing. A limiting platform for restricting the insertion position of the adsorbent is provided on the inner side wall of the filtering mechanism housing.

4. The evaporator for low-temperature waste heat power generation according to claim 1, characterized in that, An installation flange is provided on the outer side wall of the first end of the filtering mechanism housing. The filtering mechanism housing is connected to the evaporator housing through the installation flange.

5. The evaporator for low-temperature waste heat power generation according to claim 1, wherein A connector is provided at the second end of the filtering mechanism housing. The filtering mechanism housing is connected to the flue gas input pipe through the connector.

6. The evaporator for low-temperature waste heat power generation according to claim 1, wherein The heat exchange pipes are arranged in a serpentine bending manner inside the evaporator housing. A plurality of fins are provided on the heat exchange pipes. The plurality of fins are sequentially arranged at intervals along the length direction of the heat exchange pipes.

7. The evaporator for low-temperature waste heat power generation according to claim 1, wherein The inlet of the heat exchange pipe is connected to one end of a first connecting pipe. The other end of the first connecting pipe passes through the side wall of the evaporator housing and is arranged outside the evaporator housing.

8. The evaporator for low-temperature waste heat power generation according to claim 7, characterized in that, A first control valve is provided on the first connecting pipe.

9. The evaporator for low-temperature waste heat power generation according to claim 1, wherein The outlet of the heat exchange pipe is connected to one end of a second connecting pipe. The other end of the second connecting pipe passes through the side wall of the evaporator housing and is arranged outside the evaporator housing.

10. The evaporator for low-temperature waste heat power generation according to claim 9, wherein A second control valve is provided on the second connecting pipe.

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