Plate type evaporation and concentration evaporator

Abstract

The utility model discloses a plate type evaporation and concentration evaporator which comprises a feeding pump, the circulating separation assembly comprises a heater, a separation unit, a circulating pump and a discharging pump; a steam generator and a compressor; the condensation assembly comprises a condenser, a condensation water tank, a condensation water pump and a vacuum pump. The hot water assembly comprises a hot water tank and a hot water pump. According to the plate-type evaporation and concentration evaporator, one of live steam formed by heating soft water through the steam generator and high-temperature steam formed by compressing secondary steam through the compressor can be selected as a heat source to heat and concentrate feed liquid in a separation unit, and a large amount of live steam is prevented from being used for a long time, so that the power consumption is reduced, and energy conservation and emission reduction are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of concentration evaporator, especially to a plate type evaporation concentration evaporator. BACKGROUND

[0002] Concentration evaporator is the equipment that makes the solution containing the non-volatile solute boil and vaporize and removes the steam, thereby increasing the solubility concentration of the solution, and is commonly used for industrial wastewater concentration treatment.

[0003] The concentration evaporator in the prior art has a fixed and single mode during operation, and a large amount of live steam needs to be continuously input into the separator, which results in large power consumption of the concentration evaporator and is not conducive to energy saving and emission reduction. In addition, the secondary steam generated by boiling contains part of liquid droplets after the heat exchange between the feed liquid in the separator and the live steam, and the liquid droplets flow with the secondary steam due to the lack of separation treatment of the liquid droplets and the secondary steam, which not only reduces the amount of concentrated liquid discharged from the separator, but also affects the subsequent treatment equipment and the surrounding environment.

[0004] Therefore, it is necessary to improve the concentration evaporator in the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at overcoming the defects in the prior art, and provides a plate type evaporation concentration evaporator with different operation modes, reduced energy consumption, energy saving and environmental protection.

[0006] To achieve the above technical effects, the technical scheme of the utility model is as follows: a plate type evaporation concentration evaporator, comprising:

[0007] a feed pump;

[0008] a circulating separation assembly, the circulating separation assembly comprises a heater, a separator unit, a circulating pump and a discharge pump, the heater has a heating inlet, a heating outlet, a heating steam inlet and a hot water outlet, the separator unit has a separation inlet, a concentrated liquid outlet and a pure steam outlet, the output end of the feed pump and the output end of the circulating pump are both in communication with the heating inlet, the heating outlet is in communication with the separation inlet, the concentrated liquid outlet is in communication with the heating inlet through the circulating pump, and the concentrated liquid outlet is in communication with the outside through the discharge pump;

[0009] a steam generator and a compressor, the steam generator has a soft water inlet and a live steam outlet, the compressor has a compressed steam inlet and a compressed steam outlet, the live steam outlet and the compressed steam outlet are both in communication with the heating steam inlet, and the pure steam outlet is in communication with the compressed steam inlet;

[0010] A condensing assembly, which comprises a condenser, a condensing water tank, a condensing water pump and a vacuum pump, the condenser has a cooling inlet, a cooling outlet, a condensing inlet and a condensing outlet, the cooling inlet and the cooling outlet are used for inputting and discharging cooling water respectively, the condensing inlet is communicated with the pure steam outlet, the condensing outlet is communicated with the input end of the condensing water pump through the condensing water tank, the output end of the condensing water pump is communicated with the outside, and the condensing water tank is communicated with the outside through the vacuum pump.

[0011] A hot water assembly, which comprises a hot water tank and a hot water pump, the hot water outlet is communicated with the input end of the hot water pump through the hot water tank, and the output end of the hot water pump is communicated with the outside.

[0012] Preferably, in order to completely separate the secondary steam and the liquid drops, the separating assembly comprises a primary separator and a secondary separator, the separating inlet and the concentrated liquid outlet are arranged on the primary separator, the primary separator is further provided with a secondary steam outlet, the pure steam outlet is arranged on the secondary separator, the secondary separator is further provided with a secondary steam inlet, and the secondary steam outlet is communicated with the secondary steam inlet.

[0013] Preferably, in order to facilitate the recycling of the liquid drops separated from the secondary steam for further concentration treatment, the primary separator is provided with a reflux inlet, the secondary separator is provided with a reflux outlet, and the reflux outlet is communicated with the reflux inlet.

[0014] Preferably, in order to improve the compression effect, the compressor is a Roots compressor.

[0015] Preferably, in order to facilitate the collection of the hot water discharged by the compressor, the compressor is further provided with a drain port, and the drain port is communicated with the hot water tank.

[0016] Preferably, in order to reduce the temperature of the discharged hot water, the hot water assembly further comprises a spraying pump, a spraying water cooler is arranged between the hot water pump and the compressor, the spraying water cooler has a spraying inlet, a spraying outlet, a circulating inlet and a circulating outlet, the circulating inlet and the circulating outlet are used for inputting and discharging cooling water respectively, the spraying inlet is communicated with the output end of the spraying pump, and the spraying outlet is communicated with the compressed steam inlet.

[0017] Preferably, in order to realize the circulating flow of the hot water, the output end of the hot water pump and the output end of the spraying pump are both communicated with the hot water tank.

[0018] Preferably, in order to ensure the stable operation of the compressor, the compressor is further provided with a cooling inlet and a cooling outlet, and the cooling inlet and the cooling outlet are used for inputting and discharging cooling water respectively.

[0019] Preferably, in order to ensure stable conveying material, the input end of the feeding pump is connected with a feeding buffer tank.

[0020] In summary, compared with the prior art, the plate type evaporation concentrator can select one of the live steam formed by heating soft water by a steam generator and the high-temperature steam formed by compressing secondary steam by a compressor as a heat source to heat the liquid in the separation unit, concentrate the liquid, avoid using a large amount of live steam for a long time, thereby reducing power consumption and realizing energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the utility model;

[0022] Figure 2 is a connection structure schematic diagram of the device for processing material of the utility model;

[0023] Figure 3 is a connection structure schematic diagram of the device for processing steam of the utility model;

[0024] Figure 4 is a connection structure schematic diagram of the device for processing cooling water of the utility model;

[0025] In the drawing: 1, feeding pump; 2, heater; 201, heating inlet; 202, heating outlet; 203, heating steam inlet; 204, hot water outlet; 3, primary separator; 301, separation inlet; 302, concentrated liquid outlet; 303, secondary steam outlet; 304, backflow inlet; 4, secondary separator; 401, pure steam outlet; 402, secondary steam inlet; 403, backflow outlet; 5, circulating pump; 6, discharge pump; 7, steam generator; 701, soft water inlet; 702, live steam outlet; 8, compressor; 801, compressed steam inlet; 802, compressed steam outlet; 803, drain port; 804, cooling inlet; 805, cooling outlet; 9, hot water tank; 10, hot water pump; 11, spraying pump; 12, spraying water cooler; 1201, spraying inlet; 1202, spraying outlet; 1203, circulating inlet; 1204, circulating outlet; 13, feeding buffer tank; 14, condenser; 1401, cooling inlet; 1402, cooling outlet; 1403, condensing inlet; 1404, condensing outlet; 15, condensate tank; 16, condensate pump; 17, vacuum pump. DETAILED DESCRIPTION

[0026] The specific implementation of the utility model will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0027] AsFigures 1-4 The utility model discloses a plate type evaporation concentration evaporator, including:

[0028] Feed pump 1;

[0029] Circulation separation assembly, circulation separation assembly includes heater 2, separation unit, circulating pump 5 and discharge pump 6, and heater 2 has heating import 201, heating export 202, heating steam import 203 and hot water outlet 204, and separation unit has separation import 301, concentrated liquid export 302 and pure steam export 401, and the output of feed pump 1 and the output of circulating pump 5 are all communicated with heating import 201, and heating export 202 is communicated with separation import 301, and concentrated liquid export 302 is communicated with heating import 201 by circulating pump 5, and concentrated liquid export 302 is communicated with the outside by discharge pump 6;

[0030] Steam generator 7 and compressor 8, and steam generator 7 has soft water import 701 and live steam export 702, and compressor 8 has compressed steam import 801 and compressed steam export 802, and live steam export 702 and compressed steam export 802 are all communicated with heating steam import 203, and pure steam export 401 is communicated with compressed steam import 801;

[0031] Condensing assembly, condensing assembly includes condenser 14, condensing water tank 15, condensing water pump 16 and vacuum pump 17, and condenser 14 has cooling import 1401, cooling export 1402, condensing import 1403 and condensing export 1404, and cooling import 1401 and cooling export 1402 are used to input and discharge cooling water respectively, and condensing import 1403 is communicated with pure steam export 401, and condensing export 1404 is communicated with the input end of condensing water pump 16 by condensing water tank 15, and the output end of condensing water pump 16 is communicated with the outside, and condensing water tank 15 is communicated with the outside by vacuum pump 17;

[0032] Hot water assembly, hot water assembly includes hot water tank 9 and hot water pump 10, and hot water outlet 204 is communicated with the input end of hot water pump 10 by hot water tank 9, and the output end of hot water pump 10 is communicated with the outside.

[0033] When the device is running, the solution containing solute is delivered by the feed pump 1 into the heater 2 through the heating inlet 201, and exchanges heat with steam in the heater 2, so that the heater 2 heats the material, which is then discharged through the heating outlet 202 and delivered into the separation unit through the separation inlet 301. In the separation unit, evaporation and concentration are carried out, so that the concentration of the material is increased, and secondary steam is generated. The material with increased concentration is discharged from the concentrated liquid outlet 302, and the high-concentration material is input into the heater 2 again through the circulating pump 5 for heating treatment, and then input into the separation unit. In this way, the concentration of the material gradually increases to the preset concentration during the circulating flow, and the material is discharged from the concentrated liquid outlet 302 and discharged to the outside by the discharge pump 6.

[0034] In the heater 2, the heating steam inlet 203 is used to input high-temperature steam, which exchanges heat with the material flowing inside to heat the material, so that the steam temperature is reduced to form hot water, which is discharged through the hot water outlet 204. In the heater 2, the steam used is mainly sourced from any one of the following two: one is the live steam generated by the steam generator 7, which is preferably an electric steam generator 7. The soft water inlet 701 is used to input soft water, which is heated to form high-temperature live steam. The other is the pure secondary steam generated when the separation unit separates and evaporates the material. The secondary steam is discharged through the pure steam outlet 401 and then enters the compressor 8 through the compressed steam inlet 801. The secondary steam is compressed by the compressor 8, so that the temperature of the secondary steam is increased by about 18 degrees Celsius. The compressed steam then enters the heater 2 to exchange heat with the material.

[0035] The secondary steam can also flow into the condenser 14 through the condensing inlet 1403, and the circulating cooling water flows into the condenser 14 through the cooling inlet 1401 to exchange heat with the secondary steam. Then, the temperature of the circulating cooling water is increased, and the circulating cooling water is discharged from the cooling outlet 1402. The temperature of the secondary steam is reduced to form condensed water, which is discharged from the condensing outlet 1404 and flows into the condensed water tank 15. The condensed water in the condensed water tank 15 is discharged from the system by the condensed water pump 16.

[0036] The plate type evaporation concentration evaporator, according to actual operation needs, can select to use the live steam generated by the steam generator 7 to heat the soft water or the high-temperature compressed steam formed by the compressor 8 to heat the secondary steam discharged from the separation unit as a heat source to heat the material flowing into the heater 2. The valve is arranged between the live steam outlet 702 of the steam generator 7 and the heating steam inlet 203, and between the compressed steam outlet 802 of the compressor 8 and the heating steam inlet 203. The valve can be opened and closed to select any one as a heat source to heat the material, which is convenient and flexible to operate, avoids long-term single use of live steam, reduces the overall power consumption of the device, and realizes energy saving.

[0037] After the steam heats the material in the heater 2, the temperature is reduced to form hot water, which is discharged from the hot water outlet 204 and enters the hot water tank 9. The hot water in the hot water tank 9 is stored and pumped out by the hot water pump 10 to drive the flow and then discharged to the outside.

[0038] Further improvement is that the compressor 8 is a Roots compressor 8.

[0039] The Roots compressor 8 can provide efficient steam compression capacity, reduce energy consumption, improve production efficiency, and has low noise during operation. Compared with other types of compressors, the internal structure is simple, so the failure rate is low, and stable working performance can be provided.

[0040] Further improvement is that the compressor 8 also has a cooling inlet 804 and a cooling outlet 805, and the cooling inlet 804 and the cooling outlet 805 are respectively used for inputting and discharging cooling water. During the operation of the compressor 8, cooling water is input through the cooling inlet 804, and heat exchange is performed between the cooling water and the compressor 8 to achieve the effect of cooling the compressor 8 and ensure the stable operation of the compressor. After heat exchange, the cooling water is discharged through the cooling outlet 805.

[0041] Further improvement is that the compressor 8 also has a drain port 803, and the drain port 803 is in communication with the hot water tank 9. When the compressor 8 compresses the humid secondary steam, the water in the secondary steam exceeds the saturated steam pressure at the current temperature and pressure, and the water is separated from the steam to form liquid water, which is conveniently introduced into the hot water tank 9 through the drain port 803.

[0042] Further improvement is that the hot water assembly further comprises a spray pump 11, and a spray water cooler 12 is arranged between the hot water pump 10 and the compressor 8. The spray water cooler 12 has a spray inlet 1201, a spray outlet 1202, a circulation inlet 1203 and a circulation outlet 1204. The circulation inlet 1203 and the circulation outlet 1204 are respectively used for inputting and discharging cooling water. The spray inlet 1201 is in communication with the output end of the spray pump 11, and the spray outlet 1202 is in communication with the compressed steam inlet 801.

[0043] In the hot water assembly, the spray pump 11 can extract the hot water in the hot water tank 9, and deliver the hot water to the spray water cooler 12 through the spray inlet 1201, and the circulating cooling water is introduced into the circulating inlet 1203, and the circulating cooling water is heated after heat exchange with the hot water with higher temperature, and the circulating cooling water is discharged from the circulating outlet 1204, and the steam generated during spraying is discharged from the spray outlet 1202, and the steam is introduced into the compressor 8 through the compressed steam inlet 801 to be compressed and heated to form compressed steam, which is used as a heat source for heat exchange with the material in the heater 2.

[0044] In order to promote the internal hot water circulation flow in the hot water tank 9, the output end of the hot water pump 10 and the output end of the spray pump 11 are communicated with the hot water tank 9.

[0045] Further improvement is that the input end of the feeding pump 1 is connected with the feeding buffer tank 13.

[0046] By arranging the feeding buffer tank 13, the material to be concentrated can be temporarily stored, so that the feeding pump 1 can provide the material to the heater 2 at a specific rate, and ensure that the heating process is orderly, continuously and stably carried out.

[0047] Further improvement is that the separation unit includes a primary separator 3 and a secondary separator 4, the separation inlet 301 and the concentrated liquid outlet 302 are arranged on the primary separator 3, the primary separator 3 is further provided with a secondary steam outlet 303, the pure steam outlet 401 is arranged on the secondary separator 4, the secondary separator 4 is further provided with a secondary steam inlet 402, the secondary steam outlet 303 is communicated with the secondary steam inlet 402; the primary separator 3 is provided with a backflow inlet 304, the secondary separator 4 is provided with a backflow outlet 403, and the backflow outlet 403 is communicated with the backflow inlet 304.

[0048] Compared with the prior art, the separation unit of the utility model can be separated twice through the primary separator 3 and the secondary separator 4, in the primary separator 3, a negative pressure environment is formed by vacuumizing, the material boils in the negative pressure environment, the secondary steam is formed and part of the liquid drops is driven to flow upward, and the secondary steam is discharged from the secondary steam outlet 303, and the material with increased concentration is formed at the bottom of the primary separator 3 and discharged from the concentrated liquid outlet 302.

[0049] The secondary steam mixed with the liquid droplets enters the secondary separator 4 from the secondary steam inlet 402, and steam and liquid droplets are separated in the secondary separator 4 to form clean secondary steam which is discharged through the pure steam outlet 401, and the liquid droplets are accumulated in the secondary separator 4 and then discharged through the reflux outlet 403 and enter the primary separator 3 through the reflux inlet 304 to continue the concentration treatment, so that the liquid droplets are not discharged into the subsequent treatment equipment and the environment with the secondary steam, the normal operation of the concentration evaporator is ensured, and the pollution influence on the surrounding environment is reduced.

[0050] In the evaporation process, the non-condensable gas such as air originally mixed in the secondary steam will not be condensed, and these non-condensable gases are divided into two routes under the action of the vacuum pump 17, one of which enters the secondary separator 4, flows through the condenser 14 and the condenser water tank 15, and is finally sucked into the vacuum pump 17 and discharged out of the system, and the other enters the hot water tank 9 and is then sucked into the vacuum pump 17 and discharged out of the system.

[0051] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the technical principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A plate evaporative concentration evaporator characterized by, The utility model relates to a kind of steam generator and its control system, including: Feed pump (1); Circulation separation assembly, the circulation separation assembly includes heater (2), separation unit, circulating pump (5) and discharge pump (6), the heater (2) has heating import (201), heating export (202), heating steam import (203) and hot water outlet (204), the separation unit has separation import (301), concentrated liquid outlet (302) and pure steam outlet (401), the output of the feed pump (1) and the output of the circulating pump (5) are all communicated with the heating import (201), the heating export (202) is communicated with the separation import (301), the concentrated liquid outlet (302) is communicated with the heating import (201) by the circulating pump (5), the concentrated liquid outlet (302) is communicated with outside by the discharge pump (6); Steam generator (7) and compressor (8), the steam generator (7) has soft water import (701) and live steam outlet (702), the compressor (8) has compressed steam import (801) and compressed steam export (802), the live steam outlet (702) and the compressed steam export (802) are all communicated with the heating steam import (203), the pure steam outlet (401) is communicated with the compressed steam import (801); Condensing assembly, the condensing assembly includes condenser (14), condensing water tank (15), condensing water pump (16) and vacuum pump (17), the condenser (14) has cooling import (1401), cooling export (1402), condensing import (1403) and condensing export (1404), the cooling import (1401) and the cooling export (1402) are used for input and discharge cooling water respectively, the condensing import (1403) is communicated with the pure steam outlet (401), the condensing export (1404) is communicated with the input of the condensing water pump (16) by the condensing water tank (15), the output of the condensing water pump (16) is communicated with outside, the condensing water tank (15) is communicated with outside by the vacuum pump (17); Hot water assembly, the hot water assembly includes hot water tank (9) and hot water pump (10), the hot water outlet (204) is communicated with the input of the hot water pump (10) by the hot water tank (9), the output of the hot water pump (10) is communicated with outside.

2. The plate evaporative concentration evaporator of claim 1, wherein: The separation unit includes primary separator (3) and secondary separator (4), the separation import (301) and the concentrated liquid outlet (302) are both arranged on the primary separator (3), the primary separator (3) is further provided with secondary steam outlet (303), the pure steam outlet (401) is arranged on the secondary separator (4), the secondary separator (4) is further provided with secondary steam import (402), the secondary steam outlet (303) is communicated with the secondary steam import (402).

3. The plate evaporative concentration evaporator of claim 2, wherein: The primary separator (3) is provided with a backflow inlet (304), and the secondary separator (4) is provided with a backflow outlet (403) in communication with the backflow inlet (304).

4. The plate evaporative concentration evaporator of claim 1, wherein: The compressor (8) is a Roots compressor (8).

5. The plate evaporative concentration evaporator of claim 1, wherein: The compressor (8) is further provided with a water outlet (803) in communication with the hot water tank (9).

6. The plate evaporative concentration evaporator of claim 5, wherein: The hot water assembly further comprises a spraying pump (11), and a spraying water cooler (12) is arranged between the hot water pump (10) and the compressor (8), the spraying water cooler (12) being provided with a spraying inlet (1201), a spraying outlet (1202), a circulating inlet (1203) and a circulating outlet (1204), the circulating inlet (1203) and the circulating outlet (1204) being respectively used for inputting and discharging cooling water, the spraying inlet (1201) being in communication with an output end of the spraying pump (11), and the spraying outlet (1202) being in communication with the compressed steam inlet (801).

7. The plate evaporative concentration evaporator of claim 6, wherein: The output end of the hot water pump (10) and the output end of the spraying pump (11) are both in communication with the hot water tank (9).

8. The plate evaporative concentration evaporator of claim 1, wherein: The compressor (8) is further provided with a cooling inlet (804) and a cooling outlet (805), and the cooling inlet (804) and the cooling outlet (805) are respectively used for inputting and discharging cooling water.

9. The plate evaporative concentration evaporator of claim 1, wherein: The input end of the feeding pump (1) is connected with a feeding buffer tank (13).

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