Multi-effect plate-type evaporator

Abstract

The utility model discloses a multi-effect plate type evaporator which comprises a lower shell, a plate type evaporator body is installed at the upper end of a gas heater, an evaporation chamber is installed at the top end of the plate type evaporator body, a wire mesh demister is installed at the top end of an upper shell, and a secondary steam conveying pipe is installed at the top end of a gas-liquid separator. The evaporation chambers and the heating chambers are connected through the plate type heat exchanger, the plate type heat exchanger has the advantages of being high in heat transfer coefficient, small in occupied area, easy to clean and maintain and the like, and the overall heat transfer effect of the evaporator is effectively improved. Therefore, the evaporation of each effect can fully utilize the waste heat of the previous effect, the evaporation efficiency is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporators, and more specifically, to a multi-effect plate evaporator. Background Art

[0002] A plate evaporator is a highly efficient heat exchange device that uses metal plates as heat transfer elements to replace the traditional round tube structure. Its design features give the plate evaporator advantages in terms of heat transfer efficiency, floor area, and maintenance convenience.

[0003] In the evaporation process of existing evaporator equipment, usually only a single evaporation effect can be achieved, with low evaporation efficiency and high energy consumption, which cannot meet the high-efficiency and low-cost requirements of modern chemical production.

[0004] For the problems in the related art, no effective solution has been proposed yet. Summary of the Utility Model

[0005] In view of the problems in the related art, the present utility model provides a multi-effect plate evaporator to overcome the above-mentioned technical problems existing in the related art.

[0006] Specifically, the technical solution adopted by the present utility model is as follows:

[0007] The multi-effect plate evaporator includes a lower housing. A gas heater is installed at the lower end inside the lower housing. A plate evaporator is installed above the gas heater. An evaporation chamber is installed at the top of the plate evaporator. An upper housing is installed at the top of the evaporation chamber. A wire mesh demister is installed at the top of the upper housing. A gas-liquid separator is installed at the top of the wire mesh demister. A secondary steam delivery pipe is installed at the top of the gas-liquid separator. A stop valve is installed at the end of the secondary steam delivery pipe on the right end. A vacuum pipe is installed outside the stop valve. A condenser is installed at the end of the vacuum pipe.

[0008] As a further solution of the present utility model, a pumping pipe is fixedly installed at the left end of the leftmost lower housing, and the lower housing is fixedly connected to the upper housing.

[0009] As a further solution of the present utility model, a gas delivery pipe is installed at the right end of the gas heater, and a flame nozzle and an igniter are provided at the upper end of the gas heater.

[0010] As a further solution of the present utility model, a circulation pipe is fixedly installed outside the plate evaporator, and a circulation pump is installed at the right end of the circulation pipe.

[0011] As a further solution of the present utility model, the secondary steam delivery pipe on the left is communicated with the upper housing in the middle, and the secondary steam delivery pipe in the middle is communicated with the upper housing on the right.

[0012] As a further solution of the present utility model, a condensate storage tank is installed at the bottom end of the condenser, and a liquid discharge valve is installed at the right end of the condensate storage tank.

[0013] As a further solution of the present utility model, there are 3 groups of plate evaporators, 3 groups of gas heaters, and 3 groups of gas-liquid separators.

[0014] The beneficial effects of the present utility model are as follows:

[0015] By arranging a gas heater, a plate evaporator, an evaporation chamber, a wire mesh demister, a gas-liquid separator, etc., the present utility model connects the evaporation chamber and the heating chamber with a plate heat exchanger. The plate heat exchanger has the advantages of high heat transfer coefficient, small floor area, easy cleaning and maintenance, etc., effectively improving the overall heat transfer effect of the evaporator. The present utility model adopts a multi-effect design, that is, multiple evaporation chambers and heating chambers are arranged in sequence, so that the evaporation of each effect can make full use of the waste heat of the previous effect, improving the evaporation efficiency and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only 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.

[0017] Figure 1 is the overall structural schematic diagram of a multi-effect plate evaporator according to an embodiment of the present utility model;

[0018] Figure 2 is the installation structural schematic diagram of the gas heater and the plate evaporator of the multi-effect plate evaporator according to an embodiment of the present utility model;

[0019] Figure 3 is the overall structural schematic diagram of the gas-liquid separator of the multi-effect plate evaporator according to an embodiment of the present utility model;

[0020] Figure 4 is the installation structural schematic diagram of the plate evaporator and the circulation pump of the multi-effect plate evaporator according to an embodiment of the present utility model.

[0021] In the figure:

[0022] 1. Lower housing; 2. Gas heater; 3. Plate evaporator; 4. Evaporation chamber; 5. Upper housing; 6. Wire mesh demister; 7. Gas-liquid separator; 8. Secondary steam delivery pipe; 9. Circulation pipe; 10. Circulation pump; 11. Stop valve; 12. Vacuum pipe; 13. Condenser; 14. Condensate storage tank; 15. Pumping pipe. Detailed implementation manners

[0023] To further illustrate each embodiment, the present utility model provides accompanying drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can cooperate with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0024] According to an embodiment of the present utility model, a multi-effect plate evaporator is provided.

[0025] Please refer to the attached Figures 1-4 specification. The multi-effect plate evaporator according to an embodiment of the present utility model includes a lower housing 1. A gas heater 2 is installed at the lower end inside the lower housing 1. A plate evaporator 3 is installed at the upper end of the gas heater 2. An evaporation chamber 4 is installed at the top of the plate evaporator 3. An upper housing 5 is installed at the top of the evaporation chamber 4. A wire mesh demister 6 is installed at the top of the upper housing 5. A gas-liquid separator 7 is installed at the top of the wire mesh demister 6. A secondary steam delivery pipe 8 is installed at the top of the gas-liquid separator 7. A stop valve 11 is installed at the end of the secondary steam delivery pipe 8 on the right end. A vacuum pipe 12 is installed outside the stop valve 11. A condenser 13 is installed at the end of the vacuum pipe 12.

[0026] When this device is in use, raw materials are input into the leftmost evaporation chamber 4 through a delivery pump. After the gas heater 2 is turned on, the gas is ignited to heat the plate evaporator 3. Then, the plate evaporator 3 evaporates the materials in the evaporation chamber 4. After the steam passes through the wire mesh demister 6, it enters the gas-liquid separator 7 for gas-liquid separation to obtain the corresponding separated liquid. The secondary steam then enters the next-stage evaporation chamber 4 through the secondary steam delivery pipe 8. The liquid in the plate evaporator 3 is circulated by the circulation pump 10. Multiple evaporation chambers and heating chambers are sequentially arranged in the housing. Each evaporation chamber corresponds to a heating chamber. The evaporation chamber and the heating chamber are connected by a plate heat exchanger. The delivery pump is used to pump the materials into the evaporation chamber, and the separator is used to separate the gas-liquid mixture after evaporation. The present utility model adopts a multi-effect design, that is, multiple evaporation chambers and heating chambers are sequentially arranged, so that the evaporation of each effect can make full use of the waste heat of the previous effect, improve the evaporation efficiency, and reduce the energy consumption.

[0027] In one embodiment, please refer to the appended drawings of the specification Figures 1-4 As a further solution of the present utility model, a pumping pipe 15 is fixedly installed at the left end of the lower housing 1 located at the leftmost side, and the lower housing 1 is fixedly connected to the upper housing 5.

[0028] The material is transported to the evaporation chamber 4 through the pumping pipe 15 by a transport pump.

[0029] In another embodiment, please refer to the appended drawings of the specification Figures 1-4 As a further solution of the present utility model, a gas delivery pipe is installed at the right end of the gas heater 2, and a flame nozzle and an igniter are provided at the upper end of the gas heater 2.

[0030] The flame nozzle of the gas heater 2 directly faces the lower surface of the plate evaporator 3, and the heat of the flame is conducted to the internal fluid through the metal plate, and the circulation pipe 9 and the circulation pump 10 ensure the uniform flow of the fluid to avoid local overheating.

[0031] The gas is transported to the gas heater 2 through the gas delivery pipe, and the gas ejected from the flame nozzle is ignited by the igniter, and the flame heats the plate evaporator 3.

[0032] In one embodiment, please refer to the appended drawings of the specification Figures 1-4 As a further solution of the present utility model, a circulation pipe 9 is fixedly installed outside the plate evaporator 4, and a circulation pump 10 is installed at the right end of the circulation pipe 9.

[0033] The output port of the plate evaporator 3 is directly communicated with the bottom of the evaporation chamber 4, and the steam rising path is vertical; multiple effects are connected in series through the secondary steam delivery pipe 8, and the secondary steam of the previous effect is used as the heat source of the subsequent effect.

[0034] The liquid in the pipeline is circulated by the circulation pump 10, so that the evaporation of each effect can make full use of the waste heat of the previous effect, improve the evaporation efficiency and reduce the energy consumption.

[0035] In another embodiment, please refer to the appended drawings of the specification Figures 1-4 As a further solution of the present utility model, the left secondary steam delivery pipe 8 is communicated with the upper housing 5 in the center, and the secondary steam delivery pipe 8 in the center is communicated with the upper housing 5 on the right.

[0036] The remaining steam enters the next-stage evaporation chamber.

[0037] In one embodiment, please refer to the appended drawings of the specification Figures 1-4 As a further solution of the present utility model, a condensate storage tank 14 is installed at the bottom end of the condenser 13, and a drain valve is installed at the right end of the condensate storage tank 14.

[0038] The condenser 13 cools the steam to form a liquid.

[0039] In another embodiment, please refer to the appended drawings of the specification Figures 1-4 , as a further solution of the present utility model, there are 3 groups of the plate evaporators 3, 3 groups of the gas heaters 2, and 3 groups of the gas-liquid separators 7.

[0040] The 3 groups of gas heaters, plate evaporators, and gas-liquid separators together form a multi-effect evaporator, improving the energy utilization rate.

[0041] During use, the raw materials are input into the evaporation chamber 4 at the leftmost end through a delivery pump. After the gas heater 2 is turned on, the gas is ignited to heat the plate evaporator 3. Then, the plate evaporator 3 evaporates the materials in the evaporation chamber 4. After the steam passes through the wire mesh demister 6, it enters the gas-liquid separator 7 for gas-liquid separation to obtain the corresponding separated liquid. The secondary steam then enters the next-stage evaporation chamber 4 through the secondary steam delivery pipe 8. The circulating pump 10 is used to make the liquid in the plate evaporator 3 circulate. Multiple evaporation chambers and heating chambers are sequentially arranged in the shell. Each evaporation chamber corresponds to a heating chamber. The evaporation chamber and the heating chamber are connected through a plate heat exchanger. The delivery pump is used to pump the materials into the evaporation chamber, and the separator is used to separate the gas-liquid mixture after evaporation. During operation, the opening degree of the stop valve 11 is adjusted to control the secondary steam flow rate; the rate of the circulating pump 10 is set to 0.5 - 2 m / s to ensure the thermal efficiency; the vacuum tube 12 maintains a pressure of 0.1 - 0.5 atm. The present utility model adopts a multi-effect design, that is, multiple evaporation chambers and heating chambers are sequentially arranged, so that the evaporation of each effect can make full use of the waste heat of the previous effect, improving the evaporation efficiency and reducing the energy consumption.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Multi-effect plate evaporator, including a lower housing (1), characterized in that: A gas heater (2) is installed at the lower inner end of the lower housing (1). A plate evaporator (3) is installed at the upper end of the gas heater (2). An evaporation chamber (4) is installed at the top of the plate evaporator (3). An upper housing (5) is installed at the top of the evaporation chamber (4). A wire mesh demister (6) is installed at the top of the upper housing (5). A gas-liquid separator (7) is installed at the top of the wire mesh demister (6). A secondary steam delivery pipe (8) is installed at the top of the gas-liquid separator (7). A stop valve (11) is installed at the end of the secondary steam delivery pipe (8) on the right end. A vacuum pipe (12) is installed outside the stop valve (11). A condenser (13) is installed at the end of the vacuum pipe (12).

2. The multi-effect plate evaporator according to claim 1, characterized in that: A pumping pipe (15) is fixedly installed at the left end of the lower housing (1) on the leftmost side. The lower housing (1) is fixedly connected to the upper housing (5).

3. The multi-effect plate evaporator according to claim 1, wherein: A gas delivery pipe is installed at the right end of the gas heater (2). A flame nozzle and an igniter are provided at the upper end of the gas heater (2).

4. The multi-effect plate evaporator according to claim 1, characterized in that: A circulation pipe (9) is fixedly installed outside the plate evaporator (3). A circulation pump (10) is installed at the right end of the circulation pipe (9).

5. The multi-effect plate evaporator according to claim 1, characterized in that: The secondary steam delivery pipe (8) on the left is communicated with the upper housing (5) in the middle. The secondary steam delivery pipe (8) in the middle is communicated with the upper housing (5) on the right.

6. The multi-effect plate evaporator according to claim 1, characterized in that: A condensate storage tank (14) is installed at the bottom end of the condenser (13). A drain valve is installed at the right end of the condensate storage tank (14).

7. The multi-effect plate evaporator according to claim 1, characterized in that: There are 3 groups of the plate evaporators (3), 3 groups of the gas heaters (2), and 3 groups of the gas-liquid separators (7).

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