CN217367170U

CN217367170U - But rapid cooling's concentrated cauldron

Info

Publication number: CN217367170U
Application number: CN202221227579.1U
Authority: CN
Inventors: 郜晨昱; 李欣纯; 万福根
Original assignee: Henan Yinzhidu Environmental Protection Technology Co ltd
Current assignee: Henan Yinzhidu Environmental Protection Technology Co ltd
Priority date: 2022-05-21
Filing date: 2022-05-21
Publication date: 2022-09-06
Anticipated expiration: 2032-05-21

Abstract

The utility model discloses a but rapid cooling's concentrated cauldron relates to concentrated crystallization equipment technical field, the reactor comprises a kettle, the upper end of the cauldron body is equipped with feed inlet, gas vent, the bottom of the cauldron body is equipped with the discharge gate, the internal temperature regulation apparatus that is equipped with of cauldron, temperature regulation apparatus includes a plurality of heat exchange tubes, the heat exchange tube is arranged along vertical direction at the internal cauldron, the surface of heat exchange tube is equipped with the fin, the upper end of heat exchange tube is passed the cauldron body and intercommunication first branch pipe, second branch pipe, the lower extreme of heat exchange tube passes the cauldron body and intercommunication third branch pipe, fourth branch pipe, be equipped with the valve on first branch pipe, second branch pipe, third branch pipe, the fourth branch pipe, first branch pipe is located second branch pipe top, the third branch pipe is located the fourth branch pipe top. The utility model is used for contain the concentration and the cooling crystallization of salt solution, can solve the problem that concentrated cauldron space utilization is low, cooling rate is slow.

Description

But rapid cooling's concentrated cauldron

Technical Field

The utility model relates to a concentrated crystallization equipment technical field specifically is a but rapid cooling's concentrated cauldron.

Background

The coking desulfurization waste liquid contains a large amount of ammonium thiocyanate, ammonium thiosulfate, ammonium sulfate, ammonium polysulfide, suspended sulfur, free ammonia and other substances, wherein salts such as the ammonium thiocyanate, the ammonium sulfate, the ammonium thiosulfate and the like have recovery values, and high-purity products can be obtained through a salt extraction process.

In the salt extraction process of the coking desulfurization waste liquid, the desulfurization waste liquid after decolorization needs to be distilled and concentrated, ammonium sulfate and ammonium thiosulfate are crystallized and separated out by utilizing the difference of solubility, and a concentrated solution of ammonium thiocyanate is obtained. At present, the main cooling mode of the concentration kettle is to introduce circulating water into a cooling coil inside the crystallization kettle, take away the heat of a concentrated solution, or naturally cool liquid in the concentration kettle by standing for a long time. The natural cooling mode is too long in time consumption and not suitable for large-scale continuous production, when circulating water is adopted for cooling, due to the fact that the heating pipe is arranged in the concentration kettle and the cooling coil is added, the utilization rate of the inner space of the concentration kettle is low, and cooling water needs to be emptied in advance in the distillation concentration stage to prevent heat loss. In addition, most of the existing cooling coils are longitudinal spiral pipes, the heat exchange area of the cooling coils is limited, and the heat of the concentrated solution absorbed by cooling water is limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a but rapid cooling's concentrated cauldron, it is fast, the high advantage of space utilization to have the cooling rate to solve the problem that concentrated cauldron space utilization is low, cooling rate is slow.

The utility model adopts the technical scheme as follows:

the utility model provides a but rapid cooling's concentrated cauldron, includes the cauldron body, the upper end of the cauldron body is equipped with feed inlet, gas vent, the bottom of the cauldron body is equipped with the discharge gate, the internal temperature regulation apparatus that is equipped with of cauldron, temperature regulation apparatus includes a plurality of heat exchange tubes, the heat exchange tube is arranged along vertical direction at the internal cauldron, the surface of heat exchange tube is equipped with the fin, the upper end of heat exchange tube is passed the cauldron body and intercommunication first branch pipe, second branch pipe, the lower extreme of heat exchange tube passes the cauldron body and intercommunication third branch pipe, fourth branch pipe, be equipped with the valve on first branch pipe, second branch pipe, third branch pipe, the fourth branch pipe, first branch pipe is located second branch pipe top, the third branch pipe is located fourth branch pipe top.

Preferably, the middle part of the heat exchange tube is provided with an expansion section, the pipe diameter of the expansion section is larger than the pipe diameters of other parts of the heat exchange tube, and the fins are arranged on the expansion section.

Preferably, the upper end of the heat exchange tube is provided with a first collecting tube, the heat exchange tube is communicated with the first collecting tube, and an outlet of the first collecting tube is communicated with the first branch tube and the second branch tube.

Preferably, the lower end of the heat exchange tube is provided with a second collecting tube, the heat exchange tube is communicated with the second collecting tube, and an outlet of the second collecting tube is communicated with the third branch tube and the fourth branch tube.

Preferably, the outer wall of the third branch pipe is provided with a heat preservation shell.

Preferably, the fins are flat plates, and the planes of the fins are perpendicular to the horizontal plane.

Preferably, the heat exchange tubes are annularly arranged around the axis of the kettle body, and the first collecting pipe is annular.

Preferably, the heat exchange tubes are annularly arranged around the axis of the kettle body, and the second collecting pipe is annularly arranged.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

(1) the electric heating is replaced by adopting a steam heating mode, and the steam and cooling water used for cooling crystallization share a heat exchange pipe, so that the volume occupied by the electric heating pipe arranged in the kettle body is saved, the kettle body with the same volume has larger volume, and the space utilization rate in the kettle body is improved;

(2) a plurality of heat exchange pipes are adopted to replace a single spiral heat exchange pipe, so that the movement path of cooling water is greatly shortened, and compared with a spiral cooling coil, the residence time of the cooling water in the heat exchange pipes can be reduced, and the temperature of the cooling water at the outlet of the heat exchange pipes is reduced, so that the temperature difference between the cooling water and the solution in the kettle body is increased, and the cooling speed is accelerated;

(3) the heat exchange tube is provided with an expansion section in the kettle body, the diameter of the heat exchange tube is larger than that of other parts in the kettle body, the contact area of the heat exchange tube and the solution is increased, and the heat exchange efficiency is improved;

(4) the surface of the heat exchange tube is provided with the fins, so that the heat exchange area can be greatly increased through the fins, and meanwhile, the fins are very thin, so that the inner space of the kettle body is hardly occupied;

(5) the heat exchange tubes and the fins are vertical to the horizontal plane, so that crystals generated in the cooling process can be prevented from settling on the surfaces of the heat exchange tubes and the fins, and the regular cleaning is not needed.

Drawings

Fig. 1 is a perspective view of embodiment 1.

FIG. 2 is a front view of embodiment 1.

FIG. 3 is a structural view of a temperature control apparatus in example 1.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is a perspective view of embodiment 2.

The labels in the figure are: 1. a kettle body; 2. a heat exchange pipe; 4. a valve; 101. a feed inlet; 102. an exhaust port; 103. a discharge port; 201. a fin; 202. an expansion section; 301. a first branch pipe; 302. a second branch pipe; 303. a third branch pipe; 304. a fourth branch pipe; 501. a first manifold; 502. a second manifold; 3031. and (4) a heat preservation shell.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following detailed description of the present invention is made with reference to the accompanying drawings and examples, and it should be understood that the specific examples described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.

Example 1

As shown in the figure, the embodiment provides a concentration kettle capable of rapidly cooling, which comprises a kettle body 1, wherein a feed port 101 and an exhaust port 102 are arranged at the upper end of the kettle body 1, a salt solution is fed through the feed port 101, water vapor generated in the evaporation concentration process of the salt solution is discharged from an exhaust hole 102, a discharge port 103 is arranged at the bottom of the kettle body 1, a temperature regulating device is arranged in the kettle body 1 and used for discharging the concentrated solid-liquid mixture and used for heating the salt solution and rapidly cooling the evaporated and concentrated salt solution, the temperature regulating device comprises 12 heat exchange tubes 2, the heat exchange tubes 2 are arranged in the kettle body 1 along the vertical direction, copper fins 201 are arranged on the surfaces of the heat exchange tubes 2, the upper ends of the heat exchange tubes 2 penetrate through the kettle body 1 and are communicated with a first branch tube 301 and a second branch tube 302, the lower ends of the heat exchange tubes 2 penetrate through the kettle body 1 and are communicated with a third branch tube 303 and a fourth branch tube 304, the first branch tube 301 and the second branch tube 302, Valves 4 are arranged on a third branch pipe 303 and a fourth branch pipe 304, the first branch pipe 301 is positioned above the second branch pipe 302, the third branch pipe 303 is positioned above the fourth branch pipe 304, the third branch pipe 303 is communicated with a steam pipeline, the fourth branch pipe 304 is communicated with a cooling water pipeline, an outlet of the first branch pipe 301 is communicated with the outside atmosphere, and an outlet of the second branch pipe 302 is communicated with a hot water pipeline.

In order to increase the heat exchange area of the heat exchange tube 2, an expansion section 202 is arranged in the middle of the heat exchange tube 2, the pipe diameter of the expansion section 202 is larger than that of the other parts of the heat exchange tube 2, and the fins 201 are arranged on the expansion section 202.

The upper end of the heat exchange tube 2 is provided with a first collecting tube 501, so that the outlet of the heat exchange tube 2 is communicated with the first branch tube 301 and the second branch tube 302, specifically, the outlet of the heat exchange tube 2 is communicated with the first collecting tube 501, and the outlet of the first collecting tube 501 is communicated with the first branch tube 301 and the second branch tube 302.

The lower end of the heat exchange tube 2 is provided with a second collecting tube 502, so that the inlet of the heat exchange tube 2 is communicated with the third branch tube 303 and the fourth branch tube 304, specifically, the inlet of the heat exchange tube 2 is communicated with the second collecting tube 502, and the outlet of the second collecting tube 502 is communicated with the third branch tube 303 and the fourth branch tube 304.

The fins 201 are flat, the plane of the fins 201 is vertical to the horizontal plane, 6 fins 201 are uniformly arranged on the outer wall of each heat exchange tube 2, and the width of each fin 201 is 3/4 of the outer diameter of the heat exchange tube 2.

The heat exchange tubes 2 are annularly arranged around the axis of the kettle body 1, and the first collecting tube 501 and the second collecting tube 502 are annular; in other embodiments, the arrangement of the heat exchange tubes 2 may also be rectangular, square, etc.

The working process of the concentration kettle is as follows:

1) and (3) evaporation and concentration: injecting the decolored coking desulfurization waste liquid into the kettle body 1 from the feeding hole 101, opening the exhaust hole 102, closing the valves on the second branch pipe 302 and the fourth branch pipe 304, then opening the valves on the first branch pipe 301 and the third branch pipe 303, leading steam to enter the heat exchange pipe 2 from the third branch pipe 303, heating the coking desulfurization waste liquid through the pipe wall and the fins 201 of the heat exchange pipe 2, discharging the steam after heat exchange with the coking desulfurization waste liquid from the first branch pipe 301, and finally discharging the steam into the atmosphere, wherein the moisture in the coking desulfurization waste liquid is gradually evaporated along with the temperature rise of the coking desulfurization waste liquid, so as to improve the concentration of the waste liquid, leading the steam generated in the concentration process to be discharged from the exhaust hole 102 and finally discharged into the atmosphere, and after the evaporation and concentration are finished, keeping the concentrated liquid in the kettle body 1 and entering a cooling crystallization process;

2) cooling and crystallizing: closing valves on the third branch pipe 303 and the first branch pipe 301 in sequence, stopping introducing steam into the heat exchange pipe 2, opening the second branch pipe 302 and the fourth branch pipe 304, introducing cooling water from the fourth branch pipe 304, rapidly reducing the temperature of the heat exchange pipe 2 to absorb the heat of the concentrated solution, crystallizing and separating ammonium sulfate and ammonium thiosulfate by utilizing the difference of solubility, obtaining a concentrated solution of ammonium thiocyanate, increasing the temperature of the cooling water subjected to heat exchange through the heat exchange pipe 2, sending the concentrated solution from the second branch pipe 302 to a hot water pipeline for secondary utilization, opening a discharge port 103 after cooling and crystallizing, discharging the ammonium thiocyanate solution mixed with ammonium sulfate and ammonium thiosulfate crystals, and separating by using a filtering device or a filter pressing device in a subsequent process.

Example 2

In order to reduce the heat loss of the steam before entering the kettle body 1, a heat insulation shell 3031 is arranged on the outer wall of the third branch pipe 303, as shown in fig. 5, the heat insulation shell 3031 is made of an aluminum alloy thin plate, and rock wool is filled between the heat insulation shell 3031 and the third branch pipe 303.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a but concentrated cauldron of rapid cooling, includes the cauldron body (1), the upper end of the cauldron body (1) is equipped with feed inlet (101), gas vent (102), the bottom of the cauldron body (1) is equipped with discharge gate (103), be equipped with temperature regulation apparatus in the cauldron body (1), characterized in that, temperature regulation apparatus includes a plurality of heat exchange tubes (2), heat exchange tubes (2) are arranged along vertical direction in the cauldron body (1), the surface of heat exchange tubes (2) is equipped with fin (201), the upper end of heat exchange tubes (2) is passed the cauldron body (1) and is linked together first branch pipe (301), second branch pipe (302), the lower extreme of heat exchange tubes (2) passes the cauldron body (1) and is linked together third branch pipe (303), fourth branch pipe (304), be equipped with valve (4) on first branch pipe (301), second branch pipe (302), third branch pipe (303), fourth branch pipe (304), the first branch pipe (301) is located above the second branch pipe (302), and the third branch pipe (303) is located above the fourth branch pipe (304).

2. The concentrating kettle capable of rapidly reducing the temperature according to claim 1, wherein an expansion section (202) is arranged in the middle of the heat exchange tube (2), the tube diameter of the expansion section (202) is larger than that of the other parts of the heat exchange tube (2), and the fins (201) are arranged on the expansion section (202).

3. A concentrator still capable of rapidly reducing temperature according to claim 1 or 2, wherein a first collecting pipe (501) is arranged at the upper end of the heat exchange pipe (2), the heat exchange pipe (2) and the first collecting pipe (501) are communicated, and the outlet of the first collecting pipe (501) is communicated with the first branch pipe (301) and the second branch pipe (302).

4. A concentrator still capable of rapidly reducing temperature according to claim 1 or 2, wherein the lower end of the heat exchange tube (2) is provided with a second collecting tube (502), the heat exchange tube (2) and the second collecting tube (502) are communicated, and the outlet of the second collecting tube (502) is communicated with the third branch tube (303) and the fourth branch tube (304).

5. A concentrator kettle capable of rapidly reducing temperature according to claim 1 or 2, wherein the outer wall of the third branch pipe (303) is provided with a heat insulation shell (3031).

6. The kettle according to claim 1 or 2, wherein the fins (201) are flat, and the plane of the fins (201) is perpendicular to the horizontal plane.

7. A concentrator still capable of rapidly reducing temperature according to claim 3, wherein the heat exchange tubes (2) are arranged in a ring shape around the axis of the still body (1), and the first collecting tube (501) is in a ring shape.

8. A concentrator still capable of rapidly reducing temperature according to claim 4, wherein the heat exchange tubes (2) are arranged in a ring shape around the axis of the still body (1), and the second collecting tube (502) is in a ring shape.