Evaporative crystallization device for zinc sulfate production

Abstract

The utility model relates to the technical field of zinc sulfate production, and discloses an evaporative crystallization device for zinc sulfate production, which comprises a heat exchanger, the top of the heat exchanger is fixedly connected with a feed pipe, one end of the feed pipe is fixedly connected with a preheating box, and the top of the preheating box is fixedly connected with a liquid inlet pipe. The top of the liquid inlet pipe is fixedly connected with a filter hopper, and the top of the filter hopper is connected with a top cover in a clamped mode. The device has the following advantages and effects that a solution enters the flow dividing box, is dispersed to the flow dividing holes, flows out downwards and is filtered by the filter screen, insoluble impurities are left on the filter screen, and the filtered solution enters the preheating box along the liquid inlet pipe; the solution is preheated by the preheating box, the solution with the increased temperature enters the heat exchanger along the feeding pipe to be heated and subjected to subsequent evaporative crystallization, after the solution is filtered, it is avoided that the purity of crystals is affected, meanwhile, after preheating in the feeding process, the heating efficiency of the heat exchanger is reduced, and therefore the working efficiency of crystallization is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of zinc sulfate production, in particular to an evaporation crystallization device for zinc sulfate production. Background Art

[0002] Zinc sulfate is colorless or white crystals, granules or powder. Zinc oxide is added to a dilute sulfuric acid solution to form a slurry. After the reaction is complete, it is filtered, and zinc powder is added to replace copper, cadmium, nickel, etc. The filtrate is filtered, and potassium permanganate is added to oxidize impurities such as iron and manganese. After filtering, it is clarified, concentrated, cooled and crystallized, centrifuged and dried. It can also be obtained by leaching roasted zinc ore powder with sulfuric acid. Zinc sulfate is mostly prepared by evaporation.

[0003] However, the existing evaporation crystallization device is not convenient for filtering the solution during evaporation crystallization, so that other insoluble impurities may be mixed in the zinc sulfate solution. The insoluble impurities enter the heat exchanger and the evaporation crystallizer, thereby affecting the purity of the crystals. Therefore, improvement is needed. Utility Model Content

[0004] The utility model aims to provide an evaporation crystallization device for zinc sulfate production, which has the effect of avoiding affecting the purity of crystallization and reducing the heating efficiency of the heat exchanger after the feeding process is preheated.

[0005] The above technical purpose of the utility model is achieved through the following technical scheme: an evaporation crystallization device for zinc sulfate production, comprising a heat exchanger, a feed pipe is fixedly connected to the top of the heat exchanger, one end of the feed pipe is fixedly connected to a preheating box, a liquid inlet pipe is fixedly connected to the top of the preheating box, a filter bucket is fixedly connected to the top of the filter bucket, a top cover is clamped on the top of the filter bucket, a liquid pump is fixedly connected to the bottom of the top cover, one end of the liquid pump is fixedly connected to a pumping pipe, the bottom of the liquid pump is fixedly connected to a liquid outlet pipe, the bottom of the liquid outlet pipe is fixedly connected to a diversion box, a diversion hole is provided at the bottom of the diversion box, and a filter screen is clamped on the inner wall of the filter bucket.

[0006] By adopting the above technical scheme, when in use, the staff puts the top cover on the top of the filter bucket, passes the suction pipe connecting hose into the solution to be evaporated, starts the liquid pump, and makes the suction pipe suck the solution, and the solution is output from the liquid outlet pipe, the solution enters the diversion box, disperses to several diversion holes and flows downward, is filtered by the filter screen, and insoluble impurities remain on the filter screen. The filtered solution enters the preheating box along the liquid inlet pipe, and the solution is preheated by the preheating box. The solution with increased temperature enters the heat exchanger along the feed pipe for heating, and then performs subsequent evaporation and crystallization. After the solution is filtered, it avoids affecting the purity of the crystallization. At the same time, after the feed process is preheated, the heating efficiency of the heat exchanger is reduced, thereby improving the working efficiency of the crystallization.

[0007] The utility model is further configured as follows: an evaporation crystallizer is arranged on one side of the heat exchanger, and a circulation pump is arranged on one side of the evaporation crystallizer.

[0008] By adopting the above technical solution, the heated solution enters the evaporation crystallizer for crystallization, and the circulation pump circulates the solution in the heat exchanger and the evaporation crystallizer.

[0009] The utility model is further configured as follows: a connecting pipe is fixedly connected to the outer surface of the evaporator crystallizer, and one end of the connecting pipe is fixedly connected to the heat exchanger.

[0010] By adopting the above technical solution, the connecting pipe is convenient for steam to pass through, so that the evaporator crystallizer and the heat exchanger are connected.

[0011] The utility model is further configured as follows: a steam inlet pipe is fixedly connected to one side of the heat exchanger, a shunt pipe is fixedly connected to the top of the steam inlet pipe, and a cavity is left inside the preheating box.

[0012] By adopting the above technical solution, external steam enters the heat exchanger from the steam inlet pipe, and part of the steam is diverted by the diverter pipe.

[0013] The utility model is further configured as follows: the shunt pipe extends to the inside of the cavity, and a fixing ring is fixedly connected to the inner wall of the preheating box.

[0014] By adopting the above technical solution, a small portion of steam enters the cavity, thereby increasing the temperature inside the preheating box.

[0015] The utility model is further configured as follows: a heating ring is fixedly connected to the outer surface of the fixing ring, and a heating ring is arranged on the inner wall of the fixing ring.

[0016] By adopting the above technical solution, the solution and the heating ring are heated by the heating ring, thereby improving the heating efficiency.

[0017] The utility model is further configured as follows: a connecting pipe is fixedly connected to the top of the preheating box, and a gas transmission pipe is fixedly connected to the top of the connecting pipe.

[0018] By adopting the above technical solution, the steam in the cavity flows from the connecting pipe into the connecting pipe, and the steam enters the gas transmission pipe and then enters the heat exchanger.

[0019] The utility model is further configured as follows: the number of the fixing rings is nine, and the distances between any two of the nine fixing rings are equal.

[0020] By adopting the above technical solution, the number of fixed rings is large and they are arranged in a linear array.

[0021] The utility model is further configured as follows: a connecting frame is fixedly connected to the outer surface of the heating coil, and the connecting frame is fixedly connected to the inner wall of the fixing ring.

[0022] By adopting the above technical solution, the heating coils are supported by the connecting frame, and the solution passes through the gaps between the heating coils.

[0023] The utility model is further configured as follows: a heating wire is provided on the outer surface of the heating ring, and the number of the heating wires is several.

[0024] By adopting the above technical solution, the heating wire enables the heating coil to have a heating effect, and the solution is quickly preheated.

[0025] The beneficial effects of the utility model are:

[0026] 1. The utility model, through the coordinated arrangement among the heat exchanger, the feed pipe, the preheating box, the liquid inlet pipe, the filter bucket, the top cover, the liquid pump, the extraction pipe, the liquid outlet pipe, the diverter box, the diverter hole and the filter screen, can make the device in use, when the extraction pipe is connected to the hose and passed into the solution to be evaporated, start the liquid pump, so that the extraction pipe sucks the solution, the solution is output from the liquid outlet pipe, the solution enters the diverter box, disperses to a plurality of diverter holes and flows downward, is filtered by the filter screen, and insoluble impurities remain on the filter screen, the filtered solution enters the preheating box along the liquid inlet pipe, the solution is preheated by the preheating box, the solution with increased temperature enters the heat exchanger along the feed pipe for heating, and then performs subsequent evaporation and crystallization, after the solution is filtered, it can avoid affecting the purity of the crystal, and at the same time, after the feed process is preheated, the heating efficiency of the heat exchanger is reduced, thereby improving the working efficiency of the crystallization.

[0027] 2. The utility model, through the coordinated arrangement among the evaporation crystallizer, the circulation pump, the connecting pipe, the steam inlet pipe, the shunt pipe, the fixing ring, the heating ring, the heating coil, the connecting pipe, the gas pipe, the connecting frame and the heating wire, can make the device in use, part of the steam is shunted by the shunt pipe, a small part of the steam enters the cavity, thereby increasing the temperature inside the preheating box, and is heated by the heating coil through the solution and the heating ring, thereby improving the heating efficiency, the steam in the cavity flows into the connecting pipe from the connecting pipe, the steam enters the gas pipe and then enters the heat exchanger, the heating coil is supported by the connecting frame, the solution passes through the gap between the heating coils, the heating wire makes the heating coil have a heating effect, and the solution is quickly preheated. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the filter bucket of the utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the preheating box of the utility model;

[0032] Figure 4 This is a schematic diagram of the fixing ring structure of the utility model.

[0033] In the figure, 1. heat exchanger; 2. feed pipe; 3. preheating box; 4. liquid inlet pipe; 5. filter bucket; 6. top cover; 7. liquid pump; 8. extraction pipe; 9. liquid outlet pipe; 10. diverter box; 11. diverter hole; 12. filter screen; 13. evaporation crystallizer; 14. circulation pump; 15. connecting pipe; 16. steam inlet pipe; 17. diverter pipe; 18. fixing ring; 19. heating ring; 20. heating coil; 21. connecting pipe; 22. gas pipe; 23. connecting frame; 24. heating wire. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Reference Figure 1-4, an evaporation crystallization device for zinc sulfate production, comprising a heat exchanger 1, a feed pipe 2 is fixedly connected to the top of the heat exchanger 1, one end of the feed pipe 2 is fixedly connected to a preheating box 3, a liquid inlet pipe 4 is fixedly connected to the top of the preheating box 3, a filter bucket 5 is fixedly connected to the top of the liquid inlet pipe 4, a top cover 6 is clamped on the top of the filter bucket 5, a liquid pump 7 is fixedly connected to the bottom of the top cover 6, one end of the liquid pump 7 is fixedly connected to a pumping pipe 8, a liquid outlet pipe 9 is fixedly connected to the bottom of the liquid pump 7, a diversion box 10 is fixedly connected to the bottom of the liquid outlet pipe 9, a diversion hole 11 is opened at the bottom of the diversion box 10, and a filter screen 12 is clamped on the inner wall of the filter bucket 5. When in use, the staff covers the top cover 6 on the top of the filter bucket 5, connects the pumping pipe 8 to a hose and passes it into the solution to be evaporated, and starts the liquid. Pump 7, so that the extraction pipe 8 sucks the solution, the solution is output from the liquid outlet pipe 9, the solution enters the diversion box 10, disperses to a number of diversion holes 11 and flows downward, is filtered by the filter screen 12, and insoluble impurities remain on the filter screen 12. The filtered solution enters the preheating box 3 along the liquid inlet pipe 4, and the solution is preheated by the preheating box 3. The solution with increased temperature enters the heat exchanger 1 along the feed pipe 2 for heating, and then performs subsequent evaporation and crystallization. After the solution is filtered, it is avoided to affect the purity of the crystallization. At the same time, after the feed process is preheated, the heating efficiency of the heat exchanger 1 is reduced, thereby improving the working efficiency of the crystallization. An evaporation crystallizer 13 is arranged on one side of the heat exchanger 1, and a circulation pump 14 is arranged on one side of the evaporation crystallizer 13. The heated solution enters the evaporation crystallizer 1 3 is crystallized, a circulation pump 14 makes the solution circulate in the heat exchanger 1 and the evaporation crystallizer 13, a connecting pipe 15 is fixedly connected to the outer surface of the evaporation crystallizer 13, one end of the connecting pipe 15 is fixedly connected to the heat exchanger 1, the connecting pipe 15 is convenient for steam to pass through, so that the evaporation crystallizer 13 and the heat exchanger 1 are connected, a steam inlet pipe 16 is fixedly connected to one side of the heat exchanger 1, a shunt pipe 17 is fixedly connected to the top of the steam inlet pipe 16, a cavity is left inside the preheating box 3, external steam enters the heat exchanger 1 from the steam inlet pipe 16, part of the steam is shunted by the shunt pipe 17, the shunt pipe 17 extends to the inside of the cavity, a fixing ring 18 is fixedly connected to the inner wall of the preheating box 3, a small part of the steam enters the cavity, so that the temperature inside the preheating box 3 is increased, and the fixing ring 18 is fixedly connected to the inner wall of the preheating box 3, a small part of the steam enters the cavity, so that the temperature inside the preheating box 3 is increased, and the fixing ring 18 is fixedly connected to the inner wall of the preheating box 3. The outer surface of the ring 18 is fixedly connected with a heating ring 19, and the inner wall of the fixed ring 18 is provided with a heating coil 20. The solution and the heating ring 19 are heated by the heating coil 20 to improve the heating efficiency. The top of the preheating box 3 is fixedly connected with a connecting pipe 21, and the top of the connecting pipe 21 is fixedly connected with a gas pipe 22. The steam in the cavity flows into the connecting pipe 21 from the connecting pipe 21, and the steam enters the gas pipe 22 and then enters the heat exchanger 1. The number of fixed rings 18 is nine, and the distances between the nine fixed rings 18 are equal. The number of fixed rings 18 is large and they are in a linear array. The outer surface of the heating coil 20 is fixedly connected with a connecting frame 23, and the connecting frame 23 is fixedly connected to the inner wall of the fixed ring 18. The heating coil 20 is supported by the connecting frame 23, and the solution passes through the gap between the heating coils 20.The outer surface of the heating coil 20 is provided with a plurality of heating wires 24, and the heating wires 24 enable the heating coil 20 to have a heating effect, and the solution is quickly preheated.

[0036] In the utility model, through the coordinated arrangement of the heat exchanger 1, the feed pipe 2, the preheating box 3, the liquid inlet pipe 4, the filter hopper 5, the top cover 6, the liquid pump 7, the extraction pipe 8, the liquid outlet pipe 9, the diversion box 10, the diversion hole 11 and the filter screen 12, the device can be used. When the staff is in use, the top cover 6 is covered on the top of the filter hopper 5, the extraction pipe 8 is connected to the hose and passed into the solution to be evaporated, and the liquid pump 7 is started, so that the extraction pipe 8 sucks the solution, the solution is output from the liquid outlet pipe 9, and the solution enters the diversion box 10 and is dispersed to several The diverter hole 11 flows downward and is filtered by the filter screen 12. Insoluble impurities remain on the filter screen 12. The filtered solution enters the preheating box 3 along the liquid inlet pipe 4. The solution is preheated by the preheating box 3. The solution with increased temperature enters the heat exchanger 1 along the feed pipe 2 for heating, and then performs subsequent evaporation and crystallization. After the solution is filtered, it is avoided to affect the purity of the crystal. At the same time, after the feed process is preheated, the heating efficiency of the heat exchanger 1 is reduced, thereby improving the working efficiency of the crystallization. Through the evaporation crystallizer 13, the circulation pump 14, and the connecting pipe 15 The coordinated arrangement between the steam inlet pipe 16, the shunt pipe 17, the fixing ring 18, the heating ring 19, the heating coil 20, the connecting pipe 21, the air delivery pipe 22, the connecting frame 23 and the heating wire 24 enables the device to be used, the heated solution enters the evaporation crystallizer 13 for crystallization, the circulation pump 14 circulates the solution in the heat exchanger 1 and the evaporation crystallizer 13, the connecting pipe 15 facilitates the passage of steam, so that the evaporation crystallizer 13 and the heat exchanger 1 are connected, the external steam enters the heat exchanger 1 from the steam inlet pipe 16, and part of the steam The steam is diverted by the diversion pipe 17, and a small part of the steam enters the cavity, thereby increasing the temperature inside the preheating box 3. It is heated by the heating coil 20 through the solution and the heating ring 19, thereby improving the heating efficiency. The steam in the cavity flows into the connecting pipe 21 from the connecting pipe 21, and the steam enters the gas pipe 22 and then enters the heat exchanger 1. There are a large number of fixed rings 18 in a linear array. The heating coils 20 are supported by the connecting frame 23. The solution passes through the gap between the heating coils 20. The heating wire 24 makes the heating coils 20 have a heating effect, and the solution is quickly preheated.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An evaporation crystallization device for zinc sulfate production, comprising a heat exchanger (1), characterized in that: The top of the heat exchanger (1) is fixedly connected to a feed pipe (2), one end of the feed pipe (2) is fixedly connected to a preheating box (3), the top of the preheating box (3) is fixedly connected to a liquid inlet pipe (4), the top of the liquid inlet pipe (4) is fixedly connected to a filter bucket (5), the top of the filter bucket (5) is clamped with a top cover (6), the bottom of the top cover (6) is fixedly connected to a liquid pump (7), one end of the liquid pump (7) is fixedly connected to a pumping pipe (8), the bottom of the liquid pump (7) is fixedly connected to a liquid outlet pipe (9), the bottom of the liquid outlet pipe (9) is fixedly connected to a diversion box (10), the bottom of the diversion box (10) is provided with a diversion hole (11), and the inner wall of the filter bucket (5) is clamped with a filter screen (12).

2. The evaporation crystallization device for zinc sulfate production according to claim 1, characterized in that: An evaporation crystallizer (13) is provided on one side of the heat exchanger (1), and a circulation pump (14) is provided on one side of the evaporation crystallizer (13).

3. An evaporation crystallization device for zinc sulfate production according to claim 2, characterized in that: A connecting pipe (15) is fixedly connected to the outer surface of the evaporation crystallizer (13), and one end of the connecting pipe (15) is fixedly connected to the heat exchanger (1).

4. The evaporation crystallization device for zinc sulfate production according to claim 1, characterized in that: A steam inlet pipe (16) is fixedly connected to one side of the heat exchanger (1), a diversion pipe (17) is fixedly connected to the top of the steam inlet pipe (16), and a cavity is left inside the preheating box (3).

5. An evaporation crystallization device for zinc sulfate production according to claim 4, characterized in that: The shunt pipe (17) extends to the interior of the cavity, and a fixing ring (18) is fixedly connected to the inner wall of the preheating box (3).

6. An evaporation crystallization device for zinc sulfate production according to claim 5, characterized in that: A heating ring (19) is fixedly connected to the outer surface of the fixing ring (18), and a heating ring (20) is provided on the inner wall of the fixing ring (18).

7. The evaporation crystallization device for zinc sulfate production according to claim 1, characterized in that: The top of the preheating box (3) is fixedly connected to a connecting pipe (21), and the top of the connecting pipe (21) is fixedly connected to a gas delivery pipe (22).

8. The evaporation crystallization device for zinc sulfate production according to claim 5, characterized in that: The number of the fixing rings (18) is nine, and the distances between any two of the nine fixing rings (18) are equal.

9. An evaporation crystallization device for zinc sulfate production according to claim 6, characterized in that: A connecting frame (23) is fixedly connected to the outer surface of the heating ring (20), and the connecting frame (23) is fixedly connected to the inner wall of the fixing ring (18).

10. The evaporation crystallization device for zinc sulfate production according to claim 6, characterized in that: The outer surface of the heating ring (20) is provided with a heating wire (24), and the number of the heating wires (24) is several.

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