CN214735119U - Low-temperature evaporation crystallization equipment - Google Patents

Abstract

The utility model relates to an evaporative crystallizer discloses a low temperature evaporative crystallization equipment, including evaporative crystallization device, centrifuge, vacuum apparatus, a compressor, the cylinder evaporimeter, evaporative crystallization device includes the evaporimeter, the crystallizer, the upper portion that the evaporimeter is located the crystallizer is passed through central circulating pipe and is connected, the evaporimeter lateral wall is equipped with the feed inlet, the top is equipped with the steam outlet pipe, the crystallizer bottom is equipped with row cinder notch, the lateral wall is equipped with the leakage fluid dram, the feed inlet inserts contains salt waste water, the steam outlet pipe communicates in proper order has vacuum apparatus, compressor and cylinder evaporimeter, leakage fluid dram and centrifuge intercommunication, the inside cyclone that is coaxial with the steam outlet pipe that is equipped with of evaporimeter, be equipped with a plurality of air inlet window on the cyclone lateral wall, demountable installation has the defoaming net on the air inlet window. The utility model discloses can solve the gas-liquid separation in-process secondary aerial fog foam and smuggle the problem secretly, improve gas-liquid separation efficiency and crystallization effect.

Description

Low-temperature evaporation crystallization equipment

Technical Field

The utility model relates to an evaporative crystallizer especially relates to a low temperature evaporative crystallization equipment.

Background

In the industrial salt-containing wastewater treatment process, after the industrial salt-containing wastewater is preheated by the heating chamber, the superheated liquid enters the separation chamber for gas-liquid separation. The evaporative crystallizer commonly used today is a DTB crystallizer. The DTB crystallizer is an internal circulation crystallizer and comprises a shell, a guide cylinder in the shell, a demister and a stirrer at the bottom or the top of the crystallizer. In operation, the hot saturated feed liquid is pushed by the stirrer to flow into the crystallizer along the guide cylinder, and the solution is evaporated and cooled in the crystallizer to separate out crystals. However, it is very difficult to install a stirrer on the top or bottom of a large-sized evaporation tank, and in a solution containing crystal particles and having corrosiveness, a stirrer paddle bottom bearing is corroded by the solution and collided by the crystal particles to affect the service life, and a stirrer blade can cause hard damage to larger crystals. The stirrer drives the feed liquid to flow and circulate quickly, the retention time in the separation chamber is too short, the growth of larger crystals is not facilitated, the formed larger crystals are also easily damaged by the blades of the stirrer, and the crystals easily flow out of the crystallizer along with the circulation of the feed liquid to damage circulation equipment. The secondary steam generated by the steam-liquid separation of solvent evaporation often carries liquid drops or foams with different sizes, the effect of the existing demister is general, the liquid drops which are not removed influence the evaporation crystallization efficiency, and meanwhile, certain potential safety hazard is brought.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: the problem of secondary gas foam entrainment in the gas-liquid separation process is solved, and the gas-liquid separation efficiency and the crystallization effect are improved.

In order to solve the above problem, the utility model provides a following technical scheme: the utility model provides a low temperature evaporation crystallization equipment, includes evaporation crystallization device, centrifuge, vacuum apparatus, compressor, cylinder evaporimeter, evaporation crystallization device include evaporimeter, crystallizer, the upper portion that the evaporimeter is located the crystallizer pass through central circulating pipe and connect, the evaporimeter lateral wall be equipped with feed inlet, top and be equipped with the steam outlet pipe, crystallizer bottom be equipped with row cinder notch, lateral wall and be equipped with the leakage fluid dram, the feed inlet insert and contain salt waste water, the steam outlet pipe communicate in proper order and have vacuum apparatus, compressor and cylinder evaporimeter, leakage fluid dram and centrifuge intercommunication, the inside cyclone that is equipped with the steam outlet pipe is coaxial of evaporimeter, cyclone lateral wall on be equipped with a plurality of air inlet window, air inlet window on demountable installation have the defoaming net.

Furthermore, the cyclone cylinder side wall is provided with cyclone blades.

Furthermore, a liquid discharge hole is formed in the bottom of the cyclone cylinder.

Further, still include the waste residue bin, row's cinder notch and waste residue bin intercommunication.

Furthermore, a control valve is arranged between the slag discharge port and the waste residue storage tank.

Further, the waste discharge opening of roller evaporator and waste residue bin intercommunication, centrifuge's waste discharge opening and waste residue bin intercommunication.

The utility model has the advantages that: the cyclone cylinder is arranged in the evaporative crystallization device, has the characteristics of high gas-liquid separation efficiency and good crystallization effect, and can solve the problem of secondary gas foam entrainment in the gas-liquid separation process. Guarantee through vacuum apparatus that evaporation crystallization equipment is inside to be the low atmospheric pressure, reduce the temperature of evaporation, compress it with the gas that vacuum apparatus took simultaneously to evaporate through the cylinder evaporator, form solid-state waste residue with the organic matter separation that can not crystallize in the waste liquid, steam then leads to in following evaporimeter, recycles. The desalted water separated from the liquid outlet may contain tiny crystals which cannot be settled, and the crystals can be separated out through a centrifugal machine at the moment. And introducing the separated waste residues and organic matters such as inorganic salt into a waste residue storage box for unified treatment.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1: as shown in figure 1, the utility model comprises an evaporative crystallization device 1, a centrifuge 3, a vacuum device 4, a compressor 5 and a roller evaporator 6, wherein the evaporative crystallization device 1 comprises an evaporator 11 and a crystallizer 12, the evaporator 11 is positioned on the upper part of the crystallizer 12 and is connected through a central circulating pipe 13, the side wall of the evaporator 11 is provided with a feed inlet 14, the top of the evaporator is provided with a steam outlet pipe 15, the bottom of the crystallizer 12 is provided with a slag discharge port 16, the side wall of the crystallizer is provided with a liquid discharge port 17, the feed inlet 14 is connected with saline wastewater, the steam outlet pipe 15 is sequentially communicated with the vacuum device 4, the compressor 5 and the roller evaporator 6, the liquid discharge port 17 is communicated with the centrifuge 3, the inorganic salt wastewater is introduced into the evaporative crystallizer, the wastewater circularly flows in the central circulating pipe 13, the wastewater flow rate is slow, the crystal growth time is increased, and the formation of larger crystals is facilitated, meanwhile, the method is also beneficial to crystal sedimentation, and the grown crystals cannot flow out along with the feed liquid to damage the circulating equipment. In the flowing process, large crystals of the material settle to enter the bottom of the barrel under the action of gravity, fine crystals which cannot settle enter the centrifugal machine 3 along with clear liquid, crystals can be separated out through the centrifugal machine 3, and the separated desalted water can return to the production system to replace softened water for utilization, so that the system is ensured to operate in a clear liquid environment all the time. The vacuum device ensures that the interior of the evaporative crystallization equipment is low in pressure, and the evaporation temperature is reduced. Meanwhile, the gas pumped by the vacuum device is compressed and evaporated by a roller evaporator, organic matters which cannot be crystallized in the waste liquid are separated to form solid waste residues, and the steam is led into the next evaporator for recycling.

The evaporator 11 is internally provided with a cyclone cylinder 7 which is coaxial with the steam outlet pipe 15, the side wall of the cyclone cylinder 7 is provided with a plurality of air inlet windows 71, and the air inlet windows 71 are detachably provided with a defoaming net. The bottom of the cyclone cylinder 7 is provided with a liquid discharge hole. The side wall of the cyclone cylinder 7 is provided with cyclone blades. Through setting up the cyclone blade, the cyclone is rotatory under the drive of steam, aerial fog and foam enter cyclone 7 from air inlet window 71, because be provided with and remove the foam net, can reduce partly foam, secondly enter the aerial fog and the foam of cyclone 7, can be at cyclone 7 internal rotation removal, because centrifugal force effect liquid can be got rid of the inner wall of cyclone 7, can the landing to the bottom of cyclone 7 along with the thickness increase of liquid, flow out at the outage of bottom plate at last, accomplish gas-liquid separation.

The utility model discloses further be provided with waste residue bin 2, row's cinder notch 16 and waste residue bin 2 intercommunication. A control valve is arranged between the slag discharge port 16 and the waste residue storage tank 2. The waste discharge port of the roller evaporator 6 is communicated with the waste residue storage tank 2, and the waste discharge port of the centrifuge 3 is communicated with the waste residue storage tank 2. The separated waste residue and organic matters such as inorganic salt are led into the waste residue storage tank 2 for unified treatment, thereby effectively protecting the environment.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a low temperature evaporation crystallization equipment, characterized in that, including evaporation crystallization device (1), centrifuge (3), vacuum device (4), compressor (5), drum evaporator (6), evaporation crystallization device (1) including evaporimeter (11), crystallizer (12), evaporimeter (11) be located the upper portion of crystallizer (12) and pass through central circulating pipe (13) and connect, evaporimeter (11) lateral wall be equipped with feed inlet (14), the top is equipped with steam outlet pipe (15), crystallizer (12) bottom be equipped with row cinder notch (16), the lateral wall be equipped with drain outlet (17), feed inlet (14) insert and contain salt waste water, steam outlet pipe (15) communicate in proper order have vacuum device (4), compressor (5) and drum evaporator (6), drain outlet (17) and centrifuge (3) intercommunication, evaporimeter (11) inside be equipped with coaxial cyclone (7) of steam outlet pipe (15), cyclone (7) lateral wall on be equipped with a plurality of air inlet window (71), air inlet window (71) on demountable installation have the defoaming net.

2. The low-temperature evaporative crystallization device as claimed in claim 1, wherein the cyclone cylinder (7) is provided with cyclone blades on its side wall.

3. A low-temperature evaporation crystallization apparatus as claimed in claim 1, wherein a drain hole is provided at the bottom of said cyclone (7).

4. The low-temperature evaporative crystallization apparatus as claimed in claim 1, further comprising a slag storage tank (2), wherein the slag discharge port (16) is communicated with the slag storage tank (2).

5. The low-temperature evaporative crystallization apparatus as claimed in claim 4, wherein a control valve is provided between the slag discharge port (16) and the slag storage tank (2).

6. A low-temperature evaporation crystallization device as claimed in claim 4, characterized in that the waste discharge port of the drum evaporator (6) is communicated with the waste storage tank (2), and the waste discharge port of the centrifuge (3) is communicated with the waste storage tank (2).

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