Dichloromethane steam generator

Abstract

The utility model relates to a dichloromethane steam generator which comprises a shell with an inlet and an outlet, a heat exchange component and a steam-liquid separation component, the outlet is located at the top of the shell, and liquid dichloromethane is input into an inner cavity of the shell from the inlet; the heat exchange part comprises a heat exchange tube extending into the inner cavity of the shell and a heat source communicated with the heat exchange tube; the vapor-liquid separation component is arranged in the inner cavity of the shell and located above the heat exchange tube, the vapor-liquid separation component comprises a plurality of mesh plates which are distributed at intervals up and down and can intercept dichloromethane liquid drops, one part of the mesh plates is located below the liquid level of liquid dichloromethane, and the other part of the mesh plates is located above the liquid level of the liquid dichloromethane. According to the utility model, on one hand, dichloromethane liquid drops in steam can be removed through interception of the plurality of mesh plates, so that the temperature and pressure stability of output dichloromethane steam are effectively improved; on the other hand, the structure is simple and reliable, and implementation cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam generation, and specifically relates to a dichloromethane steam generator. Background Art

[0002] A steam generator, also called a steam heat source machine (commonly known as a boiler), is a mechanical device that uses the thermal energy of fuel or other energy sources to heat water into hot water or steam.

[0003] At present, in a certain engineering project, a steam generator is needed to heat liquid dichloromethane to form dichloromethane vapor for utilization, and the formed dichloromethane vapor is required to maintain stable temperature and pressure.

[0004] There is a Chinese patent with publication number CN105627284A, which discloses a steam generator, including a shell, and a heating body placed in the shell, a steam flow channel adjacent to the heating body, and two ends of the steam flow channel are respectively a water inlet and a steam outlet. The steam flow channel is a metal tube, and the metal tube is arranged in a spiral shape. The heating body is also a spiral tube. The steam flow channel is wrapped outside the heating body and spirals upward around the axial direction of the heating body.

[0005] However, in the actual production process, when the existing technology is used, the dichloromethane vapor formed is easily taken out in the form of liquid droplets while being output, which easily leads to unstable temperature and pressure of the output dichloromethane vapor (temperature and pressure fluctuations caused by heat absorption of dichloromethane droplets), thereby failing to meet production requirements. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a brand-new dichloromethane steam generator.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A dichloromethane steam generator comprises a shell with an inlet and an outlet, a heat exchange component and a vapor-liquid separation component, wherein the outlet is located at the top of the shell, and liquid dichloromethane is input into the inner cavity of the shell from the inlet; the heat exchange component comprises a heat exchange tube extending into the inner cavity of the shell, and a heat source connected to the heat exchange tube; the vapor-liquid separation component is arranged in the inner cavity of the shell and above the heat exchange tube, and the vapor-liquid separation component comprises a plurality of mesh plates which are spaced apart from each other and can intercept dichloromethane droplets, wherein a part of the plurality of mesh plates is located below the liquid dichloromethane surface, and another part is located above the liquid dichloromethane surface, and when heated, the dichloromethane vapor passes through each mesh plate in turn from bottom to top and is discharged from the outlet.

[0009] According to a specific implementation and preferred aspect of the utility model, there are two mesh plates, and the liquid level of the liquid dichloromethane is located between the two mesh plates. Here, the structure is simple and easy to install and implement.

[0010] Preferably, the liquid level of the liquid dichloromethane is set equal to the distance between the two mesh plates, thereby facilitating better formation of dichloromethane vapor and vapor-liquid separation.

[0011] According to another specific implementation and preferred aspect of the utility model, each mesh plate has a plurality of holes distributed at intervals, and the plurality of holes on adjacent mesh plates are staggered in vertical distribution, thereby effectively improving the interception rate of dichloromethane droplets and ensuring the stability of dichloromethane vapor output temperature and pressure.

[0012] Preferably, in each mesh plate, the diameter of the hole is 5 to 30 mm; and / or, in each mesh plate, the distance between two adjacent holes is less than or equal to 60 mm. Here, the separation effect of dichloromethane vapor and dichloromethane droplets is optimal.

[0013] According to another specific implementation and preferred aspect of the utility model, the shell includes a first shell body and a second shell body extending horizontally and connected from one end, wherein the height of the first shell body is less than the height of the second shell body, and the top of the second shell body forms an outlet; the heat exchange tube extends horizontally from one end of the first shell body away from the second shell body and extends into the second shell body, and the vapor-liquid separation component is arranged in the second shell body. Here, by utilizing the height difference between the first and second shell bodies, it can ensure that the heat exchange tube is quickly immersed in liquid dichloromethane, thereby improving the heat exchange efficiency.

[0014] Preferably, the cross-sections of the first shell body and the second shell body are both circular, and the inner diameter of the first shell body is smaller than the inner diameter of the second shell body; and / or, the bottoms of the first shell body and the second shell body are arranged flush.

[0015] Preferably, the mesh plate located at the top is arranged to fit the top inner wall of the second shell body.

[0016] Preferably, an inlet is also formed on the second shell body, wherein the inlet is located above or below the liquid level of the liquid dichloromethane.

[0017] In addition, the heat source uses high-temperature steam; the heat exchange tube is U-shaped and has air inlets and liquid discharge ports formed at both ends, and there are multiple heat exchange tubes distributed layer by layer. The heat exchange component also includes an auxiliary box, wherein an air inlet area and a liquid discharge area are formed in the auxiliary box, and the air inlet of each heat exchange tube is connected to the air inlet area, and the liquid discharge port is connected to the liquid discharge area. The high-temperature steam passes through the air inlet area and enters each heat exchange tube respectively, and heat exchanges with liquid dichloromethane and liquefies before entering the liquid discharge area for discharge. Here, the waste steam generated by other production links in the workshop can be connected as a heat source, and after heat exchange, it can be liquefied to form wastewater for further treatment. At the same time, the heat of the waste steam can be utilized to achieve energy saving and emission reduction.

[0018] Due to the implementation of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] The dichloromethane vapor generated by the steam generator of the prior art is likely to simultaneously carry out the liquid dichloromethane in the form of droplets when it is output, which easily leads to unstable temperature and pressure of the output dichloromethane vapor, thereby failing to meet production requirements. The present application designs the structure of the dichloromethane vapor generator as a whole, and ingeniously solves the deficiencies and defects of the prior art. After the steam generator is adopted, the liquid dichloromethane is input into the shell through the inlet, and a part of the mesh plates is kept below the dichloromethane liquid level and the other part of the mesh plates is kept above the dichloromethane liquid level. Then, the heat source is input into the heat exchange tube and heat exchange is performed with the liquid dichloromethane. After the liquid dichloromethane is heated to form dichloromethane vapor, it passes through each mesh plate from bottom to top in sequence and is discharged through the outlet. Under the interception of each mesh plate, the dichloromethane droplets are separated from the dichloromethane vapor. Therefore, compared with the prior art, the utility model can remove dichloromethane droplets in the steam through the interception of multiple mesh plates, thereby effectively improving the stability of the output dichloromethane steam temperature and pressure; on the other hand, it has a simple and reliable structure and low implementation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a simplified structural diagram of a methylene chloride steam generator of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the left side (partially omitted);

[0022] Among them: 1, shell; 11, first shell body; a0, drain port; 12, second shell body; k0, inlet; k1, outlet; a1, pressure gauge; a2, drain port; a3, safety valve port; 13, support foot;

[0023] 2. heat exchange component; 20. heat exchange tube; 21. auxiliary box; 210. air intake area; 211. liquid discharge area;

[0024] 3. Gas-liquid separation component; 30. Mesh plate. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, a detailed description is given below in conjunction with specific embodiments and drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] like Figure 1 and Figure 2 As shown, the dichloromethane steam generator of this embodiment includes a shell 1, a heat exchange component 2, and a vapor-liquid separation component 3.

[0032] Specifically, the shell 1 includes a first shell body 11 and a second shell body 12 respectively extending horizontally and connected from one end, and support feet 13 respectively arranged at the bottom of the first shell body 11 and the second shell body 12, wherein the height of the first shell body 11 is less than the height of the second shell body 12, and the side wall and the top of the second shell body 12 respectively form an inlet k0 and an outlet k1, that is, liquid dichloromethane is input into the shell 1 through the inlet k0, and the first shell body 11 is kept full of liquid dichloromethane, and a space is formed between the liquid dichloromethane level in the second shell body 12 and the top of the second shell body 12, wherein the inlet k0 is located above or below the dichloromethane liquid level.

[0033] For the convenience of implementation, the cross-sections of the first shell body 11 and the second shell body 12 are both circular, and the inner diameter of the first shell body 11 is smaller than the inner diameter of the second shell body 12; the bottoms of the first shell body 11 and the second shell body 12 are arranged flush; the bottom of the first shell body 11 is provided with a drain port a0 for emptying the liquid dichloromethane in the shell 1; the top of the second shell body 12 is also provided with a pressure gauge a1, a drain port a2 for draining the steam in the shell 1, and a safety valve port a3.

[0034] In this example, the heat exchange component 2 includes a heat exchange tube 20 extending into the inner cavity of the shell 1, a heat source connected to the heat exchange tube 20, and an auxiliary box 21, wherein the heat exchange tube 20 extends horizontally from one end of the first shell body 11 away from the second shell body 12 and extends into the second shell body 12, the heat exchange tube 20 is U-shaped and forms an air inlet and a liquid discharge port from both ends, and there are multiple heat exchange tubes 20 distributed layer by layer; the heat source uses high-temperature steam, for example, waste steam containing dichloromethane generated in the workshop production link; an air inlet area 210 and a liquid discharge area 211 separated from each other are formed in the auxiliary box 21, the air inlet of each heat exchange tube 20 is connected to the air inlet area 210, and the liquid discharge port is connected to the liquid discharge area 211, the waste steam passes through the air inlet area 220 and enters each heat exchange tube 20 respectively, and enters the liquid discharge area 221 for discharge after heat exchange with liquid dichloromethane and liquefaction.

[0035] In this example, the vapor-liquid separation component 3 is arranged in the inner cavity of the shell 1 and is located above the heat exchange tube 20, and the vapor-liquid separation component 3 includes a plurality of mesh plates 30 that are spaced apart from each other and can intercept dichloromethane droplets, wherein a portion of the plurality of mesh plates 30 is located below the liquid dichloromethane surface, and another portion is located above the liquid dichloromethane surface. When heated, the dichloromethane vapor passes through each mesh plate 30 from bottom to top in sequence and is discharged from the outlet k1.

[0036] In some specific embodiments, the gas-liquid separation component 3 is arranged in the second shell body 12, there are two mesh plates 30, and the liquid level of liquid dichloromethane is located between the two mesh plates 30; the mesh plate 30 located at the top is arranged in contact with the top inner wall of the second shell body 12; the liquid level of liquid dichloromethane and the distance between the two mesh plates 30 are set equal. In this embodiment, the mesh plate 30 located at the top is arched, and the mesh plate 30 located at the bottom is a flat plate fixedly connected to the inner wall of the second shell body 12 from the edge. Therefore, the distance between the lowest point of the mesh plate 30 located at the top and the liquid level of liquid dichloromethane is equal to the distance between the mesh plate 30 located at the bottom and the liquid level of liquid dichloromethane.

[0037] To further facilitate implementation, the mesh plate 30 is any conventional mesh plate, each mesh plate 30 has a plurality of holes distributed at intervals, and the plurality of holes on adjacent mesh plates 30 are staggered up and down; in each mesh plate, the diameter of the hole is 5 to 30 mm, and in each mesh plate, the spacing between two adjacent holes is less than or equal to 60 mm.

[0038] In summary, after adopting the steam generator, liquid dichloromethane is input into the shell through the inlet, and a part of the mesh plates are kept below the dichloromethane liquid surface and the other part of the mesh plates are kept above the dichloromethane liquid surface. Then, the heat source is input into the heat exchange tube and heat exchange is carried out with the liquid dichloromethane. After the liquid dichloromethane is heated to form dichloromethane vapor, it passes through each mesh plate from bottom to top in turn and is discharged through the outlet. Under the interception of each mesh plate, the dichloromethane droplets are separated from the dichloromethane vapor. Therefore, compared with the prior art, the utility model can, on the one hand, remove dichloromethane droplets in the steam through the interception of multiple mesh plates, thereby effectively improving the stability of the output dichloromethane steam temperature and pressure; on the other hand, the structure is simple, reliable, and the implementation cost is low; thirdly, through the layout of the upper and lower mesh plates relative to the dichloromethane liquid surface, it is convenient to better form dichloromethane steam and vapor-liquid separation; fourthly, through the layout of the holes on the upper and lower mesh plates, the interception rate of dichloromethane droplets is effectively improved, and the stability of the output temperature and pressure of dichloromethane steam is ensured, and at the same time, the separation effect of dichloromethane steam and dichloromethane droplets is optimal; fifthly, by utilizing the height difference between the first and second shell bodies, it can ensure that the heat exchange tube is quickly immersed in liquid dichloromethane, thereby improving the heat exchange efficiency; sixthly, it can connect the waste steam generated by other production links in the workshop as a heat source, and liquefy to form wastewater after heat exchange for further treatment, and at the same time, the heat of the waste steam can be utilized to achieve energy saving and emission reduction.

[0039] The above detailed description of the utility model is intended to enable people familiar with the technology in this field to understand the content of the utility model and implement it. It does not limit the protection scope of the utility model. The utility model is not limited to the above-mentioned embodiments. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A dichloromethane steam generator, characterized in that: It comprises a shell with an inlet and an outlet, a heat exchange component and a vapor-liquid separation component, wherein the outlet is located at the top of the shell, and liquid dichloromethane is input into the inner cavity of the shell from the inlet; the heat exchange component comprises a heat exchange tube extending into the inner cavity of the shell, and a heat source connected to the heat exchange tube; the vapor-liquid separation component is arranged in the inner cavity of the shell and located above the heat exchange tube, and the vapor-liquid separation component comprises a plurality of mesh plates which are spaced apart from each other and can intercept dichloromethane droplets, wherein a part of the plurality of mesh plates is located below the liquid dichloromethane surface, and another part is located above the liquid dichloromethane surface, and when heated, the dichloromethane vapor passes through each mesh plate from bottom to top in sequence and is discharged from the outlet.

2. The methylene chloride steam generator according to claim 1, characterized in that: There are two mesh plates, and the liquid surface of liquid dichloromethane is located between the two mesh plates.

3. The methylene chloride steam generator according to claim 2, characterized in that: The liquid surface of the liquid dichloromethane is set equal to the distance between the two mesh plates.

4. The methylene chloride steam generator according to claim 1, characterized in that: Each mesh plate has a plurality of holes distributed at intervals, and the plurality of holes on adjacent mesh plates are staggered in vertical distribution.

5. The methylene chloride steam generator according to claim 4, characterized in that: In each of the mesh plates, the diameter of the holes is 5 to 30 mm; and / or, in each of the mesh plates, the distance between two adjacent holes is less than or equal to 60 mm.

6. The methylene chloride steam generator according to claim 1, characterized in that: The shell includes a first shell body and a second shell body extending horizontally and connected from one end, wherein the height of the first shell body is smaller than the height of the second shell body, and the top of the second shell body forms the outlet; the heat exchange tube extends horizontally from one end of the first shell body away from the second shell body and extends into the second shell body, and the vapor-liquid separation component is arranged in the second shell body.

7. The methylene chloride steam generator according to claim 6, characterized in that: The cross-sections of the first shell body and the second shell body are both circular, and the inner diameter of the first shell body is smaller than the inner diameter of the second shell body; and / or the bottoms of the first shell body and the second shell body are arranged flush.

8. The dichloromethane steam generator according to claim 6 or 7, characterized in that: The mesh plate located at the top is arranged in close contact with the top inner wall of the second shell body.

9. The methylene chloride steam generator according to claim 6, characterized in that: The inlet is also formed on the second shell body, wherein the inlet is located above or below the liquid level of the liquid dichloromethane.

10. The methylene chloride steam generator according to claim 1, characterized in that: The heat source uses high-temperature steam; the heat exchange tube is U-shaped and has an air inlet and a liquid discharge port formed at both ends respectively, and there are multiple heat exchange tubes distributed layer by layer, and the heat exchange component also includes an auxiliary box, wherein an air inlet area and a liquid discharge area are formed in the auxiliary box, and the air inlet of each heat exchange tube is connected to the air inlet area, and the liquid discharge port is connected to the liquid discharge area. The high-temperature steam passes through the air inlet area and enters each heat exchange tube respectively, and enters the liquid discharge area for discharge after heat exchange with liquid dichloromethane and liquefaction.

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