Heat exchange assembly of MVR (Mechanical Vapor Recompression) steam generator

Abstract

The utility model discloses an MVR steam generator heat exchange assembly which comprises a heat exchanger shell, an air inlet is formed in the top of the heat exchanger shell, an air outlet is formed in the bottom of the heat exchanger shell, and a liquid outlet pipe flange is fixedly connected to the end, close to the air inlet, of one side of the heat exchanger shell. The end, close to the air outlet, of one side of the heat exchanger shell is fixedly connected with a liquid inlet pipe flange. The sealing steps in the same direction are arranged at the two ends of the interior of the heat exchanger shell and matched with the two corresponding ventilation plates and the supporting connecting rod in the middle, the two ends can be sealed at the same time through the compression spring in the mode that the air inlet plug is screwed tightly in the using process, and therefore under the condition that the sealing performance is met, only the flange of the air inlet pipe needs to be disassembled, and the sealing effect is achieved. And the internal spiral pipe can be disassembled and assembled, so that the maintenance complexity is reduced, and the practicability of the device is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam generators, in particular to a heat exchange component of an MVR steam generator. Background Art

[0002] MVR system, full name "mechanical vapor recompression" system, is a new type of high-efficiency and energy-saving evaporation equipment. MVR system is driven by electric energy, using the secondary steam and its energy generated by the evaporation of the material itself, compressed by the steam compressor to increase the enthalpy of the secondary steam, and then sent to the heating chamber as a heating heat source, thereby reducing the demand for external energy.

[0003] The existing heat exchanger assembly of the MVR steam generator will cause scale to form on the outer wall of the heat exchange spiral tube after working for a long time. After the scale accumulates to a thick thickness, it will seriously affect the heat exchange efficiency. The existing partial tubular heat exchanger is generally an integrated structure with welding and sealing. Although it can solve the sealing problem of high-pressure steam, it means that the heat exchange spiral tube inside cannot be removed and replaced. It can only be disassembled as a whole and soaked in chemicals to dissolve the scale. The overall disassembly and installation is more troublesome, and four flanges need to be disassembled and installed, which increases the maintenance cost and has further room for improvement. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide an MVR steam generator heat exchange component to solve the above problem.

[0005] To achieve the above object, a MVR steam generator heat exchange assembly is provided, comprising a heat exchanger shell, an air inlet is arranged at the top of the heat exchanger shell, an air outlet is arranged at the bottom of the heat exchanger shell, a liquid outlet pipe flange is fixedly connected to one end of the heat exchanger shell near the air inlet, and a liquid inlet pipe flange is fixedly connected to one end of the heat exchanger shell near the air outlet;

[0006] A first sealing step is provided at the lower part of the air inlet, a second sealing step is provided at the upper part of the air outlet, a first ventilation plate is provided at the inner side of the first sealing step, a second ventilation plate is provided at the inner side of the second sealing step, a plurality of spiral tubes are fixedly connected between the first ventilation plate and the second ventilation plate, a supporting connecting rod is fixedly connected at the bottom center of the first ventilation plate, and sealing gaskets are sleeved at the edges of the first ventilation plate and the second ventilation plate;

[0007] The air outlet is fixedly connected to an air outlet pipe flange, a spring sleeve is fixedly connected to the upper middle part of the first air vent plate, an air inlet plug is threadedly connected to the upper inner side of the air inlet, a spring limiting groove corresponding to the spring sleeve is provided in the middle of the air inlet plug, a compression spring is fixedly connected to the inside of the spring sleeve, and the end of the air inlet plug away from the air outlet is fixedly connected to the air inlet pipe flange.

[0008] According to the MVR steam generator heat exchange component, a glass window is provided in the middle of the heat exchanger shell, and high-bounce silica glass is inlaid in the glass window.

[0009] According to the MVR steam generator heat exchange component, the first sealing step and the second sealing step are both inverted conical slopes with a wider top and a narrower bottom at the edge, and the diameter of the large circle above the second sealing step corresponds to the diameter of the small circle below the first sealing step.

[0010] According to the MVR steam generator heat exchange assembly, the shape of the first ventilation plate corresponds to the shape of the first sealing step, and the shape of the second ventilation plate corresponds to the shape of the second sealing step.

[0011] According to the MVR steam generator heat exchange assembly, one end of the supporting connecting rod away from the first ventilation plate is fixedly connected to the upper center of the second ventilation plate.

[0012] According to the MVR steam generator heat exchange assembly, the length of the supporting connecting rod corresponds to the distance between the first sealing step and the second sealing step.

[0013] The above solution has at least one of the following beneficial effects:

[0014] 1. The heat exchanger shell of the utility model is provided with sealing steps in the same direction at both ends, which cooperate with two corresponding ventilation plates and the supporting connecting rod in the middle. When in use, the two ends can be sealed at the same time by tightening the air inlet plug and using the compression spring. Then, when the sealing is met, only the air inlet pipe flange needs to be disassembled to disassemble and assemble the internal spiral pipe, which reduces the complexity of maintenance and enhances the practicality of the device.

[0015] 2. When the utility model is working, when high-pressure steam enters the small hole of the spiral tube through the first ventilation plate, the high-pressure steam will produce a certain resistance, and then exert a certain pressure on the first ventilation plate. The pressure exerted by the high-pressure steam can further improve the sealing effect, thereby enhancing the practicality of the device.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a heat exchange component of an MVR steam generator of the utility model;

[0019] Figure 2 This is a bottom-up axonometric view of a heat exchange component of an MVR steam generator according to the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of a heat exchange component of an MVR steam generator of the utility model;

[0021] Figure 4 The utility model is a three-dimensional diagram of the internal structure of a heat exchange component of an MVR steam generator.

[0022] Legend:

[0023] 1. Heat exchanger shell; 2. Air inlet; 3. Air outlet; 4. Liquid inlet pipe flange; 5. Liquid outlet pipe flange; 6. Air outlet pipe flange; 7. Air inlet plug; 8. Air inlet pipe flange; 9. First sealing step; 10. Second sealing step; 11. First ventilation plate; 12. Second ventilation plate; 13. Spiral tube; 14. Support connecting rod; 15. Spring limit groove; 16. Spring sleeve; 17. Compression spring; 18. Sealing gasket; 19. Glass window. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0025] Reference Figure 1-4 The embodiment of the utility model provides an MVR steam generator heat exchange component, including a heat exchanger shell 1, an air inlet 2 is arranged at the top of the heat exchanger shell 1, an air outlet 3 is arranged at the bottom of the heat exchanger shell 1, a liquid outlet pipe flange 5 is fixedly connected to one end of the heat exchanger shell 1 near the air inlet 2, and a liquid inlet pipe flange 4 is fixedly connected to one end of the heat exchanger shell 1 near the air outlet 3. A glass window 19 is arranged in the middle of the heat exchanger shell 1, and high-bounce silica glass is inlaid in the glass window 19 to facilitate observation of internal scale accumulation;

[0026] A first sealing step 9 is provided at the lower part of the air inlet 2, and a second sealing step 10 is provided at the upper part of the air outlet 3. Both the first sealing step 9 and the second sealing step 10 are inverted conical slopes with a wide top and a narrow bottom at the edge. The large circle diameter above the second sealing step 10 corresponds to the small circle diameter below the first sealing step 9. A first vent plate 11 is provided on the inner side of the first sealing step 9, and a second vent plate 12 is provided on the inner side of the second sealing step 10. The shape of the first vent plate 11 corresponds to the shape of the first sealing step 9, and the shape of the second vent plate 12 corresponds to the shape of the second sealing step 10. The first vent plate 11 corresponds to the shape of the first sealing step 9, and the shape of the second vent plate 12 corresponds to the shape of the second sealing step 10. A plurality of spiral tubes 13 are fixedly connected between the second ventilation plates 12, a support connecting rod 14 is fixedly connected to the bottom center of the first ventilation plate 11, one end of the support connecting rod 14 away from the first ventilation plate 11 is fixedly connected to the upper center of the second ventilation plate 12, the length of the support connecting rod 14 corresponds to the distance between the first sealing step 9 and the second sealing step 10, and sealing gaskets 18 are sleeved at the edges of the first ventilation plate 11 and the second ventilation plate 12, so that when the first ventilation plate 11 is pressed downward, the first ventilation plate 11 and the second ventilation plate 12 are respectively pressed against the first sealing step 9 and the second sealing step 10 to form a sealing effect;

[0027] The air outlet 3 is fixedly connected to the air outlet pipe flange 6, the upper middle part of the first air vent plate 11 is fixedly connected to the spring sleeve 16, the upper inner side of the air inlet 2 is threadedly connected to the air inlet plug 7, the middle part of the air inlet plug 7 is provided with a spring limiting groove 15 corresponding to the spring sleeve 16, the inner part of the spring sleeve 16 is fixedly connected to the compression spring 17, the end of the air inlet plug 7 away from the air outlet 3 is fixedly connected to the air inlet pipe flange 8, the sealing steps in the same direction are arranged at both ends of the heat exchanger housing 1, and the two corresponding air vent plates and the support connection in the middle are matched. When in use, the rod 14 can seal both ends at the same time by tightening the air inlet plug 7 using the compression spring 17. When working, when high-pressure steam passes through the first ventilation plate 11 and enters the small hole of the spiral tube 13, the high-pressure steam will generate a certain resistance, and then a certain pressure can be applied to the first ventilation plate 11. The sealing effect can be further improved by the pressure applied by the high-pressure steam. When the sealing performance is met, the internal spiral tube 13 can be disassembled and assembled by only disassembling the air inlet pipe flange 8, thereby reducing the complexity of maintenance.

[0028] Working principle: The heat exchanger shell 1 of the utility model is provided with sealing steps in the same direction at both ends, which cooperate with two corresponding ventilation plates and the supporting connecting rod 14 in the middle. When in use, the two ends can be sealed at the same time by tightening the air inlet plug 7 using the compression spring 17. When working, when high-pressure steam passes through the first ventilation plate 11 into the small hole of the spiral tube 13, the high-pressure steam will produce a certain resistance, and then a certain pressure can be applied to the first ventilation plate 11. The sealing effect can be further improved by the pressure applied by the high-pressure steam. When the sealing is met, the internal spiral tube 13 can be disassembled and assembled by only disassembling the air inlet pipe flange 8, thereby reducing the complexity of maintenance.

[0029] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A MVR steam generator heat exchange assembly, comprising a heat exchanger housing (1), characterized in that: The top of the heat exchanger housing (1) is provided with an air inlet (2), the bottom of the heat exchanger housing (1) is provided with an air outlet (3), one end of a side of the heat exchanger housing (1) close to the air inlet (2) is fixedly connected to a liquid outlet pipe flange (5), and one end of a side of the heat exchanger housing (1) close to the air outlet (3) is fixedly connected to a liquid inlet pipe flange (4); A first sealing step (9) is provided at the lower part of the air inlet (2), a second sealing step (10) is provided at the upper part of the air outlet (3), a first ventilation plate (11) is provided on the inner side of the first sealing step (9), a second ventilation plate (12) is provided on the inner side of the second sealing step (10), a plurality of spiral tubes (13) are fixedly connected between the first ventilation plate (11) and the second ventilation plate (12), a supporting connecting rod (14) is fixedly connected at the bottom center of the first ventilation plate (11), and sealing gaskets (18) are sleeved at the edges of the first ventilation plate (11) and the second ventilation plate (12); The air outlet (3) is fixedly connected to an air outlet pipe flange (6), a spring sleeve (16) is fixedly connected to the upper middle portion of the first air vent plate (11), an air inlet plug (7) is threadedly connected to the upper inner side of the air inlet (2), a spring limiting groove (15) corresponding to the spring sleeve (16) is provided in the middle portion of the air inlet plug (7), a compression spring (17) is fixedly connected to the interior of the spring sleeve (16), and an end of the air inlet plug (7) away from the air outlet (3) is fixedly connected to an air inlet pipe flange (8).

2. The MVR steam generator heat exchange component according to claim 1, characterized in that: A glass window (19) is provided in the middle of the heat exchanger housing (1), and high-rise silica glass is inlaid in the glass window (19).

3. The MVR steam generator heat exchange assembly according to claim 1, characterized in that: The first sealing step (9) and the second sealing step (10) are both inverted conical slopes with a width at the top and a width at the bottom at the edges, and the diameter of the large circle above the second sealing step (10) corresponds to the diameter of the small circle below the first sealing step (9).

4. The MVR steam generator heat exchange component according to claim 3, characterized in that: The shape of the first ventilation plate (11) corresponds to the shape of the first sealing step (9), and the shape of the second ventilation plate (12) corresponds to the shape of the second sealing step (10).

5. The MVR steam generator heat exchange assembly according to claim 1, characterized in that: One end of the supporting connecting rod (14) away from the first ventilation plate (11) is fixedly connected to the upper center of the second ventilation plate (12).

6. The MVR steam generator heat exchange assembly according to claim 1, characterized in that: The length of the supporting connecting rod (14) corresponds to the distance between the first sealing step (9) and the second sealing step (10).

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