CN102992409B - Ferrous sulfate solution refrigerating crystallization device and method - Google Patents
Ferrous sulfate solution refrigerating crystallization device and method Download PDFInfo
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- CN102992409B CN102992409B CN201210557804.2A CN201210557804A CN102992409B CN 102992409 B CN102992409 B CN 102992409B CN 201210557804 A CN201210557804 A CN 201210557804A CN 102992409 B CN102992409 B CN 102992409B
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Abstract
The invention discloses a ferrous sulfate solution refrigerating crystallization device. The ferrous sulfate solution refrigerating crystallization device comprises a refrigerating machine, a refrigerating crystallizer and a heat exchange tube arranged in the refrigerating crystallizer as well as a refrigerating capacity adjusting tank, wherein a clapboard is arranged in the refrigerating capacity adjusting tank and used for dividing the refrigerating capacity adjusting tank into an A region and a B region which are communicated; a water inlet of the A region is communicated with a chilled water outlet of the refrigerating machine through a first valve; a water outlet of the A region is communicated with a chilled water inlet of the refrigerating machine; a water inlet of the B region is communicated with a water outlet of the heat exchange tube through a second valve and is also communicated with the chilled water outlet of the refrigerating machine through a third valve; and a water outlet of the B region is communicated with a water inlet of the heat exchange tube. The ferrous sulfate solution refrigerating crystallization device is characterized in that the water temperature of the B region is adjusted for ensuring that the temperature difference between incoming water and outgoing water of a heat exchange pipeline in the crystallizer in the refrigerating process is constant, i.e. the refrigerating capacity supplied to the refrigerating crystallizer is a steady state value, and therefore, the refrigerating capacity of the needed refrigerating machine is constant, the stable running of the refrigerating machine is ensured, and simultaneously ferrous sulfate in a solution can be prevented from locally supercooling and crystallizing to attach to the wall of the heat exchange tube.
Description
Technical field
The present invention relates to freezing and crystallizing field, particularly a kind of copperas solution freezing and crystallizing apparatus and method.
Background technology
In steel industry, in the time adopting sulfuric acid to carry out surface clean to steel part, can produce a kind of strongly acidic solution that is rich in ferrous sulfate, this solution has lost pickling ability owing to being rich in ferrous sulfate, but it has again certain acidity, there is extremely strong corrosivity, not treatedly forbid outer row.This solution can adopt freeze crystallization that the ferrous sulfate crystallization in solution is separated out, realizing solid-liquid by centrifuge again separates, its ferrous sulfate concentration of isolated liquid greatly reduces, after acid adding, can be used as pickle re-uses, the solid that sub-argument goes out is ferrous sulfate heptahydrate crystal, sell outward as commodity, the method does not have strongly acidic solution to arrange outward, has realized the recycling of acid copperas solution.Current copperas solution freezing and crystallizing device is mainly made up of refrigerator and crystallizer two parts, heat exchanger tube is set in crystallizer, producing the heat exchanger tube of chilled water flow in crystallizer by refrigerator reduces the fluid temperature in crystallizer, chilled water temperature after heat exchange raises, and enters refrigerator cooling rear recycling again.For example, because fluid temperature in crystallizer is a changing value (being reduced to 0 DEG C from 50 DEG C) in refrigerating process, in the time that the leaving water temperature of refrigerator chilled water is steady state value (as-10 DEG C), it is stable that the return water temperature of chilled water can not keep, therefore in refrigerating process, the refrigerating capacity of refrigerator is a descending process, the unstable service life that has a strong impact on refrigerator of operating mode.When freezing initial stage chilled water temperature of while and the interior fluid temperature excessive temperature differentials of crystallizer, can cause the local-crystalized heat exchange tube wall that is attached to of ferrous sulfate in solution, reduce the efficiency of a whole set of freezing and crystallizing device.
Summary of the invention
In view of this, the object of this invention is to provide a kind of copperas solution freezing and crystallizing device, this device can ensure the stable operation of refrigerator, can prevent local-crystalized at heat exchange tube wall of ferrous sulfate in freezing initial stage solution simultaneously.
The object of the invention is to be achieved through the following technical solutions:
A kind of copperas solution freezing and crystallizing device, comprise refrigerator, freezing and crystallizing device and be arranged on the heat exchanger tube in freezing and crystallizing device, also comprise cold regulation tank, in described cold regulation tank, be provided with dividing plate, described dividing plate is divided into cold regulation tank in a-quadrant and the B region of UNICOM, the chilled water delivery port of the water inlet of described a-quadrant and refrigerator is by the first valve UNICOM, the chilled water water inlet UNICOM of the delivery port of described a-quadrant and refrigerator, the water inlet in described B region and the delivery port of heat exchanger tube are logical by the second valve couplet on the door, the water inlet in described B region also passes through the 3rd valve UNICOM with the chilled water delivery port of refrigerator, the delivery port in described B region and the water inlet UNICOM of heat exchanger tube,
Further, described cold regulation tank is provided with heat-insulation layer outward;
Further, the water inlet of described a-quadrant also passes through the 4th valve UNICOM with the delivery port of heat exchanger tube;
Further, the delivery port of described cold regulation tank a-quadrant is provided with the first water pump, and the delivery port in described cold regulation tank B region is provided with the second water pump.
The present invention also provides a kind of and has utilized above-mentioned copperas solution freezing and crystallizing device to carry out the method for freezing and crystallizing, comprises the following steps:
1) open the first valve, refrigerator and the first water pump;
2) copperas solution is added in freezing and crystallizing device, open the second valve and the second water pump;
3) in the time that the Inlet and outlet water temperature difference of mensuration heat exchanger tube is less than setting value, reduce the first valve opening, increase the 3rd valve opening, recording the heat exchanger tube Inlet and outlet water temperature difference exceedes while setting value, the first valve and the 3rd valve stop motion, keep valve aperture at that time, repeats said process in refrigerating process;
4) in the time that the temperature in B region approaches a-quadrant temperature, close the first valve, close the second valve, open the 4th valve;
5) in the time that temperature in freezing and crystallizing device reaches setting value, close refrigerator, the first water pump, the second water pump, the 3rd valve and the 4th valve, refrigeration crystallization process finishes.
The invention has the beneficial effects as follows: in the present invention, the chilled water Inlet and outlet water flow of refrigerator keeps constant, can distribute the water outlet of refrigerator chilled water to enter the water yield in A, B region by control valve; The freezing water yield that enters B region regulates with the crystallizer heat exchanger tube Inlet and outlet water temperature difference, the freezing water yield that the temperature difference reduces to enter B region while being greater than setting value, when being less than setting value, the temperature difference increases the freezing water yield that enters B region, ensure heat exchange pipeline Inlet and outlet water temperature difference substantially constant, the cold of supplying with freezing and crystallizing device is a steady state value, therefore the refrigerating capacity of required refrigerator is constant, and refrigerator can remain on steady working condition operation for a long time.Move according to this kind of mode, freezing initial stage heat exchange pipeline inflow temperature is higher, can regulate with the solution temperature temperature difference in crystallizer, has avoided the ferrous sulfate local overcooling crystallization in solution to be attached to the situation of heat exchange tube wall.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating below, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can be realized and be obtained by description below.
Brief description of the drawings
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Accompanying drawing 1 is structural representation of the present invention.
Detailed description of the invention
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment is only for the present invention is described, instead of in order to limit the scope of the invention.
As shown in the figure, a kind of copperas solution freezing and crystallizing device, comprise refrigerator 1, freezing and crystallizing device 2 and be arranged on the heat exchanger tube 10 in freezing and crystallizing device, also comprise cold regulation tank 3, in described cold regulation tank, be provided with dividing plate, described dividing plate is divided into cold regulation tank in a-quadrant and the B region of local UNICOM, the chilled water delivery port of the water inlet of described a-quadrant and refrigerator is by the first valve 7 UNICOMs, the chilled water water inlet UNICOM of the delivery port of described a-quadrant and refrigerator, the water inlet in described B region and the delivery port of heat exchanger tube are by the second valve 8 UNICOMs, the water inlet in described B region also passes through the 3rd valve 9 UNICOMs with the chilled water delivery port of refrigerator, the delivery port in described B region and the water inlet UNICOM of heat exchanger tube.
In the present embodiment, the chilled water turnover water yield of refrigerator keeps constant, can be by regulating the first valve 7 and the 3rd valve 9 to distribute refrigerator water outlet to enter the water yield in A in cold regulation tank 3, B region; The freezing water yield that enters B region regulates according to the heat exchanger tube Inlet and outlet water temperature difference, when being greater than 7 DEG C, the temperature difference controls the opening of the 3rd valve 9, control enters the freezing water yield in B region, when being less than 7 DEG C, the temperature difference increases the freezing water yield that enters B region, ensure heat exchanger tube 10 Inlet and outlet water temperature difference substantially constants, the cold of supplying with freezing and crystallizing device 2 is a steady state value, thereby has ensured that the refrigerating capacity of refrigerator 1 is constant, and refrigerator 1 can remain on steady working condition operation for a long time.Move according to this kind of mode, freezing initial stage heat exchange pipeline 10 inflow temperatures are higher, can regulate with the solution temperature difference in crystallizer, avoided the ferrous sulfate local overcooling crystallization in solution to be attached to the situation of heat exchange tube wall.
As further improvement of this embodiment, described cold regulation tank 3 is outer is provided with heat-insulation layer, heat-insulation layer is set and can prevents cold leakage.
As further improvement of this embodiment, the water inlet of described a-quadrant also passes through the 4th valve 6 UNICOMs with the delivery port of heat exchanger tube; When a-quadrant and B space temperature variation are when very little, can be by closing the 3rd valve 9, open the 4th valve 6 and accelerate flowing of refrigerant.
As further improvement of this embodiment, the delivery port of described cold regulation tank a-quadrant is provided with the first water pump 4, and the delivery port in described cold regulation tank B region is provided with the second water pump 5; Water pump is set and can promotes flowing of refrigerant.
The present embodiment also discloses and has a kind ofly utilized above-mentioned copperas solution freezing and crystallizing device to carry out the method for freezing and crystallizing, comprises following process:
1) open the first valve 7, refrigerator 1 and the first water pump 4, make the temperature in cold regulation tank 3 be down to-10 DEG C of left and right;
2) copperas solution of 50 DEG C is added in freezing and crystallizing device 2, open the second valve 8 and the second water pump 5, the water temperature in the interior B of cold regulation tank 2 region raises gradually;
3) in the time that the Inlet and outlet water temperature difference of mensuration heat exchanger tube 10 is less than setting value as 7 DEG C, turn the aperture of the first valve 7 down, slowly open the 3rd valve 9, when recording the heat exchanger tube Inlet and outlet water temperature difference and exceeding 7 DEG C, the first valve 7 and the 3rd valve 9 stop motions, keep valve aperture at that time, in refrigerating process, repeat said process;
4) in the time that the temperature in B region approaches a-quadrant temperature (for example between A, B region, the temperature difference is less than 5 DEG C), close the first valve 7, close the second valve 8, open the 4th valve 6;
5) in the time that the interior temperature of freezing and crystallizing device 2 reaches setting value as 0 DEG C, close refrigerator 1, the first water pump 4, the second water pump 5, the 3rd valve 9 and the 4th valve 6, refrigeration crystallization process finishes.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of claim scope of the present invention.
Claims (3)
1. a copperas solution freezing and crystallizing device, comprise refrigerator (1), freezing and crystallizing device (2) and be arranged on the heat exchanger tube (10) in freezing and crystallizing device, it is characterized in that: also comprise cold regulation tank (3), in described cold regulation tank, be provided with dividing plate, described dividing plate is divided into cold regulation tank in a-quadrant and the B region of UNICOM, the chilled water delivery port of the water inlet of described a-quadrant and refrigerator is by the first valve (7) UNICOM, the chilled water water inlet UNICOM of the delivery port of described a-quadrant and refrigerator, the water inlet in described B region and the delivery port of heat exchanger tube are by the second valve (8) UNICOM, the water inlet in described B region also passes through the 3rd valve (9) UNICOM with the chilled water delivery port of refrigerator, the delivery port in described B region and the water inlet UNICOM of heat exchanger tube, the water inlet of described a-quadrant also passes through the 4th valve (6) UNICOM with the delivery port of heat exchanger tube, the delivery port of described cold regulation tank a-quadrant is provided with the first water pump (4), and the delivery port in described cold regulation tank B region is provided with the second water pump (5).
2. a kind of copperas solution freezing and crystallizing device according to claim 1, is characterized in that: described cold regulation tank is provided with heat-insulation layer outward.
3. utilize copperas solution freezing and crystallizing device described in claim 1 or 2 to carry out the method for freezing and crystallizing, it is characterized in that: comprise following process:
1) open the first valve (7), refrigerator (1) and the first water pump (4);
2) copperas solution is added in freezing and crystallizing device (2), open the second valve (8) and the second water pump (5), freezing and crystallizing starts;
3) in the time that the water-in and water-out temperature difference of mensuration heat exchanger tube is less than setting value, turn the aperture of the first valve (7) down, increase the 3rd valve (9) aperture, recording the heat exchanger tube Inlet and outlet water temperature difference exceedes while setting value, the first valve (7) and the 3rd valve (9) stop motion, keep valve aperture at that time, repeat said process;
4) freezing latter stage, in the time that the temperature in B region approaches a-quadrant temperature, close the first valve (7), close the second valve (8), open the 4th valve (6);
5) in the time that fluid temperature in freezing and crystallizing device (2) reaches setting value, close refrigerator (1), the first water pump (4), the second water pump (5), the 3rd valve (9) and the 4th valve (6), refrigeration crystallization process finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210557804.2A CN102992409B (en) | 2012-12-20 | 2012-12-20 | Ferrous sulfate solution refrigerating crystallization device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210557804.2A CN102992409B (en) | 2012-12-20 | 2012-12-20 | Ferrous sulfate solution refrigerating crystallization device and method |
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| Publication Number | Publication Date |
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| CN102992409A CN102992409A (en) | 2013-03-27 |
| CN102992409B true CN102992409B (en) | 2014-06-11 |
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| CN201210557804.2A Expired - Fee Related CN102992409B (en) | 2012-12-20 | 2012-12-20 | Ferrous sulfate solution refrigerating crystallization device and method |
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| CN103537115B (en) * | 2013-10-21 | 2016-05-25 | 西安近代化学研究所 | A kind of crystallization cooler and method thereof that extends the outer circulation type crystallizer operation cycle |
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| CN201545709U (en) * | 2009-10-21 | 2010-08-11 | 攀枝花东方钛业有限公司 | Device for producing feed grade one-hydrate ferrous sulfate |
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Owner name: CISDI ENGINEERING CO., LTD.;CISDI ENGINEERING CO., Effective date: 20140522 |
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Effective date of registration: 20140522 Address after: 400013 Chongqing City, Yuzhong District No. 2 Steel Road, No. 1 Patentee after: Zhongye Saide Engineering Technology Co., Ltd. Patentee after: CISDI Shanghai Engineering Co., Ltd. Address before: 400013 Chongqing City, Yuzhong District No. 2 Steel Road, No. 1 Patentee before: Zhongye Saide Engineering Technology Co., Ltd. |
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