CN210457504U - Energy-efficient zinc sulfate concentration crystallization device - Google Patents

Abstract

The utility model provides an energy-efficient zinc sulfate concentration crystallization device, including the material buffer tank, first heat exchanger, evaporation concentration device, cyclone, second heat exchanger, evaporation crystallization device and the centrifuge device that connect gradually, the export of first heat exchanger links to each other with evaporation concentration device's mother liquor import, and what evaporation concentration device's mother liquor import flowed in is the zinc sulfate solution that has added inert solid particle, evaporation concentration device's export links to each other with cyclone's inlet, cyclone's liquid outlet links to each other with the import of second heat exchanger, and the export of second heat exchanger links to each other with the evaporating chamber, and the discharge gate of crystallizing chamber passes through the discharge pump and links to each other with the centrifuge device, evaporation crystallization device, first circulating line, second heat exchanger and third feed line form first closed loop. The secondary steam is collected and reused, so that the energy consumption can be effectively reduced, and the scaling phenomenon of calcium sulfate and other impurities in the evaporation concentration process can be relieved.

Description

Energy-efficient zinc sulfate concentration crystallization device

[ technical field ] A method for producing a semiconductor device

The utility model relates to a technical field of concentrated crystallization, especially a high-efficient energy-conserving zinc sulfate concentration crystallization device.

[ background of the invention ]

At present, most zinc sulfate production enterprises adopt a high-energy-consumption and high-pollution reaction kettle evaporation crystallization method or a single-effect evaporation crystallization method to prepare zinc sulfate, the evaporation crystallization is used as an energy-consumption-intensive industrial processing process, and the energy cost of the evaporation crystallization occupies a certain proportion in the product processing process. The existing evaporative crystallization device has the advantages of low production efficiency, high labor intensity, more steam heat loss, high energy consumption and high cost, and the quality stability of products cannot be ensured. In addition, the raw material part of the zinc sulfate produced in the industrial production is derived from a metal extract in flue dust, the cost of the zinc sulfate is not only zinc oxide, but also calcium ions and a small amount of unseparated impurity particles, so that the solubility of calcium sulfate in the zinc sulfate solution generated by the reaction is far less than that of zinc sulfate in the evaporation concentration process, calcium sulfate scaling is easily generated, pipe blockage even occurs seriously, the heat exchange effect of heat exchange equipment is influenced, and part of the generated fine impurity particles such as calcium sulfate and the like can enter crystallization equipment in the next stage along with a concentrated solution, so that the efficient and energy-saving zinc sulfate concentration and crystallization device is provided.

[ Utility model ] content

The utility model aims at solving the problem in the prior art, providing a high-efficient energy-saving zinc sulfate concentration crystallization device, collect the recycle to the secondary steam, can effectual reduction energy consumption to can slow down the scale deposit phenomenon of impurity such as calcium sulfate in the evaporative concentration process.

In order to realize the purpose, the utility model provides a high-efficiency energy-saving zinc sulfate concentration crystallization device, which comprises a material buffer tank, a first heat exchanger, an evaporation concentration device, a cyclone separator, a second heat exchanger, an evaporation crystallization device and a centrifugal machine device which are connected in sequence, wherein the material buffer tank is connected with the first heat exchanger through a first feeding pipeline, the outlet of the first heat exchanger is connected with the mother liquor inlet of the evaporation concentration device, zinc sulfate solution added with inert solid particles flows into the mother liquor inlet of the evaporation concentration device, the outlet of the evaporation concentration device is connected with the liquid inlet of the cyclone separator through a second feeding pipeline, the liquid outlet of the cyclone separator is connected with the inlet of the second heat exchanger through a fourth feeding pipeline, the evaporation crystallization device comprises an evaporation chamber and a crystallization chamber which are arranged from top to bottom in sequence, the outlet of the second heat exchanger is connected with the evaporation chamber, the discharge gate of crystallization chamber below passes through the discharge pump and links to each other with the centrifuge device, one side of crystallization chamber is connected with first circulating line, install first circulating pump on the first circulating line, the export of first circulating pump passes through the pipeline and links to each other with the import of second heat exchanger, evaporation crystallization device, first circulating line, second heat exchanger and third feed pipe form first closed loop.

Preferably, an outlet of the centrifugal device is connected with a second circulating pipeline, a second circulating pump is installed on the second circulating pipeline, an outlet of the second circulating pump is connected with an inlet of the second heat exchanger through a pipeline, and the centrifugal device, the second circulating pipeline, the second heat exchanger, the third feeding pipeline and the evaporative crystallization device form a second closed loop.

Preferably, a solid discharge port is formed in the lower portion of the cyclone separator, and a third feeding pump is mounted on the fourth feeding pipeline.

Preferably, the steam outlet end of the evaporation concentration device is connected with a first steam compression device, and the secondary steam outlet of the first steam compression device is connected with the first heat exchanger.

Preferably, the steam outlet end of the evaporative crystallization device is connected with a second steam compression device, and a secondary steam outlet of the second steam compression device is connected with a second heat exchanger.

Preferably, a first feeding pump is arranged on the first feeding pipeline, and a second feeding pump is arranged on the second feeding pipeline.

Preferably, the vapor inlet pipes of the first vapor compression device and the second vapor compression device are respectively provided with a vapor control valve.

The utility model has the advantages that: the utility model discloses a material buffer tank, first heat exchanger, the evaporative concentration device, cyclone, the second heat exchanger, the cooperation of evaporative crystallization device and centrifuge device etc. through preheating the material, utilize the evaporative concentration device to carry out the evaporative crystallization after tentatively concentrating the material, can improve the concentration of material, improve the speed of follow-up evaporative crystallization, and through carrying out the pressure intensification with the steam of evaporative concentration device, evaporative crystallization device, as the heat source of two heaters, can realize collecting the secondary steam and recycle, can effectual reduction energy consumption, system operation process is high-efficient stable; in the evaporation concentration process, impurities are continuously adsorbed and crystallized through the inert solid particles, the scaling of the impurities in the device and the pipeline can be reduced, the added inert solid particles can not pollute the raw materials, the inert solid particles can be almost completely recovered in the cyclone separator, the scaling tendency is effectively reduced, the high heat exchange efficiency is kept, and the equipment cleaning period is prolonged.

The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.

[ description of the drawings ]

Fig. 1 is the structure schematic diagram of the zinc sulfate concentration and crystallization device of the utility model.

[ detailed description ] embodiments

Referring to fig. 1, the utility model relates to a high-efficiency energy-saving zinc sulfate concentration crystallization device, which comprises a material buffer tank 1, a first heat exchanger 2, an evaporation concentration device 3, a cyclone separator 9, a second heat exchanger 4, an evaporation crystallization device 5 and a centrifuge device 8 which are connected in sequence, wherein the material buffer tank 1 is connected with the first heat exchanger 2 through a first feeding pipeline, the outlet of the first heat exchanger 2 is connected with the mother liquor inlet of the evaporation concentration device 3, the zinc sulfate solution added with inert solid particles flows into the mother liquor inlet of the evaporation concentration device 3, the outlet of the evaporation concentration device 3 is connected with the inlet 91 of the cyclone separator 9 through a second feeding pipeline 30, the liquid outlet 92 of the cyclone separator 9 is connected with the inlet of the second heat exchanger 4 through a fourth feeding pipeline 90, the evaporation crystallization device 5 comprises an evaporation chamber 51 and a crystallization chamber 52 which are arranged from top to bottom in sequence, the outlet of the second heat exchanger 4 is connected with the evaporation chamber 51, the discharge hole below the crystallization chamber 52 is connected with the centrifugal device 8 through the discharge pump 81, one side of the crystallization chamber 52 is connected with the first circulating pipeline 50, the first circulating pipeline 50 is provided with the first circulating pump 501, the outlet of the first circulating pump 501 is connected with the inlet of the second heat exchanger 4 through a pipeline, and the evaporation crystallization device 5, the first circulating pipeline 50, the second heat exchanger 4 and the third feeding pipeline 40 form a first closed loop. The outlet of the centrifuge device 8 is connected with a second circulating pipeline 80, a second circulating pump 801 is installed on the second circulating pipeline 80, the outlet of the second circulating pump 801 is connected with the inlet of the second heat exchanger 4 through a pipeline, and the centrifuge device 8, the second circulating pipeline 80, the second heat exchanger 4, the third feeding pipeline 40 and the evaporative crystallization device 5 form a second closed loop. The lower part of the cyclone separator 9 is provided with a solid discharge port 93, and the fourth feeding pipeline 90 is provided with a third feeding pump 901. The steam outlet end of the evaporation concentration device 3 is connected with a first steam compression device 7, and the secondary steam outlet of the first steam compression device 7 is connected with the first heat exchanger 2. The steam outlet end of the evaporative crystallization device 5 is connected with a second steam compression device 6, and the secondary steam outlet of the second steam compression device 6 is connected with the second heat exchanger 4. The first feeding pipeline is provided with a first feeding pump 10, and the second feeding pipeline 30 is provided with a second feeding pump 301. And steam inlet pipelines of the first steam compression device 7 and the second steam compression device 6 are respectively provided with a steam control valve.

The utility model discloses the working process:

the utility model relates to a high-efficient energy-conserving zinc sulfate concentration crystallization device, in the process of using, utilize the evaporation concentration device to carry out the evaporative crystallization after tentatively concentrating the material, can improve the concentration of material, improve the speed of follow-up evaporative crystallization, utilize circulating line to return to the evaporative crystallization device with the thin solution of the sodium chloride who does not form crystal in the evaporative crystallization device and concentrate again, obtain the solid crystal salt that the moisture content is low through the dehydration of centrifuge device, the mother liquor that centrifuge device obtained can return to the evaporative crystallization device and circulate and evaporate; the steam of the evaporation concentration device and the evaporation crystallization device is pressurized and heated to be used as heat sources of the two heaters, so that secondary steam can be collected and reused, the energy consumption can be effectively reduced, and the system operation process is efficient and stable; in the evaporation concentration process, impurities are continuously adsorbed and crystallized through the inert solid particles, the scaling of the impurities in the device and the pipeline can be reduced, the added inert solid particles can not pollute the raw materials, the inert solid particles can be almost completely recovered in the cyclone separator, the scaling tendency is effectively reduced, the high heat exchange efficiency is kept, and the equipment cleaning period is prolonged.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims (7)

1. The utility model provides an energy-efficient zinc sulfate concentration crystallization device which characterized in that: including material buffer tank (1), first heat exchanger (2), evaporation concentration device (3), cyclone (9), second heat exchanger (4), evaporation crystallization device (5) and centrifugal machine device (8) that connect gradually, material buffer tank (1) links to each other with first heat exchanger (2) through first charge-in pipeline, the export of first heat exchanger (2) links to each other with the mother liquor import of evaporation concentration device (3), and what the mother liquor import of evaporation concentration device (3) flowed into is the zinc sulfate solution that has added inert solid particle, the export of evaporation concentration device (3) links to each other with inlet (91) of cyclone (9) through second charge-in pipeline (30), the liquid outlet (92) of cyclone (9) link to each other with the import of second heat exchanger (4) through fourth charge-in pipeline (90), evaporation crystallization device (5) include evaporating chamber (51) and crystallization chamber (52) that set gradually from last to down The outlet of the second heat exchanger (4) is connected with the evaporation chamber (51), the discharge hole below the crystallization chamber (52) is connected with the centrifugal device (8) through the discharge pump (81), one side of the crystallization chamber (52) is connected with a first circulating pipeline (50), the first circulating pipeline (50) is provided with a first circulating pump (501), the outlet of the first circulating pump (501) is connected with the inlet of the second heat exchanger (4) through a pipeline, and the evaporation crystallization device (5), the first circulating pipeline (50), the second heat exchanger (4) and the third feeding pipeline (40) form a first closed loop.

2. The high-efficiency energy-saving zinc sulfate concentration and crystallization device of claim 1, which is characterized in that: the outlet of the centrifugal device (8) is connected with a second circulating pipeline (80), a second circulating pump (801) is installed on the second circulating pipeline (80), the outlet of the second circulating pump (801) is connected with the inlet of the second heat exchanger (4) through a pipeline, and the centrifugal device (8), the second circulating pipeline (80), the second heat exchanger (4), the third feeding pipeline (40) and the evaporative crystallization device (5) form a second closed loop.

3. The high-efficiency energy-saving zinc sulfate concentration and crystallization device of claim 1, which is characterized in that: and a solid discharge hole (93) is formed in the lower part of the cyclone separator (9), and a third feeding pump (901) is installed on the fourth feeding pipeline (90).

4. The high-efficiency energy-saving zinc sulfate concentration and crystallization device of claim 1, which is characterized in that: the steam outlet end of the evaporation concentration device (3) is connected with a first steam compression device (7), and a secondary steam outlet of the first steam compression device (7) is connected with the first heat exchanger (2).

5. The high-efficiency energy-saving zinc sulfate concentration and crystallization device of claim 4, characterized in that: and the steam outlet end of the evaporative crystallization device (5) is connected with a second steam compression device (6), and a secondary steam outlet of the second steam compression device (6) is connected with a second heat exchanger (4).

6. The high-efficiency energy-saving zinc sulfate concentration and crystallization device of claim 1, which is characterized in that: the first feeding pipeline is provided with a first feeding pump (10), and the second feeding pipeline (30) is provided with a second feeding pump (301).

7. The high-efficiency energy-saving zinc sulfate concentration and crystallization device of claim 5, characterized in that: and steam inlet pipelines of the first steam compression device (7) and the second steam compression device (6) are respectively provided with a steam control valve.

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