CN218931766U

CN218931766U - 2-chloroacrylonitrile waste water recovery device

Info

Publication number: CN218931766U
Application number: CN202222838360.1U
Authority: CN
Inventors: 冯文波; 田辉; 郭占师; 范艳艳; 李华
Original assignee: Shandong Yijia Agriculture Chemicals Co ltd
Current assignee: Shandong Yijia Agriculture Chemicals Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-04-28
Anticipated expiration: 2032-10-27

Abstract

The utility model discloses a 2-chloroacrylonitrile waste water recovery device, which relates to the technical field of waste water recovery, wherein a distillation cavity is arranged in a distillation kettle, and a rectification column is arranged at one end of the distillation cavity far away from a support frame; a hollow crushing device is arranged between the rectifying column and the motor, the inner wall of the crushing device comprises a plurality of grooves, and the adjacent grooves are hollowed out; a blocking device is arranged in the crushing device, a bubble removing cavity is arranged between the blocking device and the inner wall of the crushing device, and the supporting rod penetrates through the crushing device and the blocking device; a plurality of stirring blades are arranged between the crushing device and the motor, and the stirring blades are connected with the supporting rods. The device has the beneficial effects that firstly, the waste water is heated by the distillation kettle by utilizing the distillation principle, so that the waste water is purified, and impurities contained in the waste water are reduced; secondly, foam generated in the stirring process is removed by utilizing the crushing device and the blocking device, so that the problem of insufficient distillation of wastewater is avoided.

Description

2-chloroacrylonitrile waste water recovery device

Technical Field

The utility model relates to the technical field of wastewater recovery, in particular to a 2-chloroacrylonitrile wastewater recovery device.

Background

In order to avoid pollution of the wastewater to the environment, a great amount of wastewater is generated during the production of 2-chloroacrylonitrile, and the wastewater is required to be recycled, and the steps for recycling the wastewater are as follows: in order to treat the chloridized wastewater generated in the production process of 2-chloroacrylonitrile, raw materials such as alkali liquor, sodium hypochlorite and the like are sequentially put into a pretreatment tank for alkali adjustment and color removal. And then removing physical impurities in a preset pretreatment tank through a filter screen, removing salt and chemical impurities through a plate-and-frame filter press, and finally distilling through a distilling kettle to further improve the purity of the returned process water. While during distillation we usually need stirring, the purpose of which is to enable the waste water in the still to be heated uniformly. However, the wastewater is prone to foam during agitation, which can affect distillation quality.

In order to qualify the recovered water, we need to improve the distillation quality, i.e. we need to consider how to reduce the foam.

Disclosure of Invention

Aiming at the defects, the utility model aims to provide a 2-chloroacrylonitrile wastewater recovery device which aims to solve the problem of excessive foam in a distillation still.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the 2-chloroacrylonitrile wastewater recovery device comprises a distillation kettle, wherein a feed inlet is formed in one end of the distillation kettle, a support frame and a discharge hole are formed in the other end of the distillation kettle, the support frame is arranged around the discharge hole, a distillation cavity is formed in the distillation kettle, and a rectification column is arranged at one end, far away from the support frame, of the distillation cavity; the distillation device comprises a distillation cavity, a feeding port, a rectifying column, a motor, a supporting rod, a motor and a support rod, wherein the motor is arranged at one end of the distillation cavity, which is far away from the feeding port, the supporting rod is arranged between the motor and the rectifying column, one end of the supporting rod is rotationally connected with the motor, and the other end of the supporting rod is rotationally connected with one end of the rectifying column, which faces towards the motor; a hollow crushing device is arranged between the rectifying column and the motor, the inner wall of the crushing device comprises a plurality of grooves, the grooves are formed by recessing from the inner wall of the crushing device to the outer wall of the crushing device, and the adjacent grooves are arranged in a hollowed-out manner; a blocking device is arranged in the crushing device, a bubble removing cavity is arranged between the blocking device and the inner wall of the crushing device, and the supporting rod penetrates through the crushing device and the blocking device; a plurality of stirring blades are arranged between the crushing device and the motor, and the stirring blades are connected with the supporting rods.

Wherein, breaker and blocking device are round platform or circular cone, breaker and blocking device's axis all coincides with the axis of bracing piece.

The outer outline size of the blocking device is smaller than the inner outline size of the crushing device, and the blocking device is sleeved with the crushing device.

A series of circular through holes are formed between the adjacent grooves, one end of each through hole is connected with the inner wall of the crushing device, and the other end of each through hole is connected with the outer wall of the crushing device.

The base is installed to one end of rectifying column, gas collecting device is installed to the other end of rectifying column, be provided with vacuum intermediate layer and filler between base and the gas collecting device, the vacuum intermediate layer sets up around the filler, the base includes a plurality of pore of ventilating, the length direction of pore of ventilating is the same with the length direction of rectifying column.

The periphery of the rectifying column is sleeved with a protective shell, the length of the protective shell is the same as that of the rectifying column, and a transparent plate is arranged on the side face of the protective shell.

The side wall of the distillation still is provided with a liquid inlet, one end of the liquid inlet, which is far away from the distillation still, is communicated with a reflux tank, a guide pipe is arranged between the gas collecting device and the reflux tank, one end of the guide pipe is communicated with the gas collecting device, and the other end of the guide pipe is communicated with the reflux tank.

The device comprises a reflux tank, a flow dividing valve, a first COD detection device, a liquid inlet, a return pipeline, a liquid inlet and a flow dividing valve, wherein the flow dividing valve is arranged at one end of the reflux tank, the first COD detection device is arranged at one end of the reflux tank, which is far away from the flow dividing valve, the return pipeline is arranged between the liquid inlet and the flow dividing valve, one end of the return pipeline is communicated with the flow dividing valve, and the other end of the return pipeline is communicated with the liquid inlet.

Wherein, the one end that first COD detection device was kept away from to the shunt valve is connected with the drain pipe, the one end that the shunt valve was kept away from to the drain pipe is connected with the detection jar, the one end of detection jar is provided with second COD detection device, the other end of detection jar is provided with gets the liquid mouth.

Wherein, the one end that the feed inlet was kept away from the stills is connected with the sheet frame extruder.

After the technical scheme is adopted, the utility model has the beneficial effects that:

firstly, the distillation principle is utilized to heat the wastewater through the distillation kettle, so that the wastewater is purified, and impurities contained in the wastewater are reduced.

Secondly, in order to guarantee that the stills can evenly heat, this device has introduced motor and stirring leaf, utilizes the mode of stirring to make waste water can be fully and even heating.

Thirdly, foam generated in the stirring process is removed by utilizing the crushing device and the blocking device, so that the problem of insufficient distillation of wastewater is avoided.

And fourthly, further improving the distillation effect of the wastewater by utilizing a rectification column.

Drawings

FIG. 1 is a structural diagram of a distillation still;

FIG. 2 is a block diagram of a rectification column;

FIG. 3 is a block diagram of a crushing device;

FIG. 4 is a top view of the crushing device;

FIG. 5 is a block diagram of a 2-chloroacrylonitrile wastewater recovery device.

Detailed Description

The utility model is further elucidated below in conjunction with the accompanying drawings.

The orientations referred to in the present specification are all based on the orientations of the 2-chloroacrylonitrile wastewater recovery device in normal operation, and are not limited to the orientations in storage and transportation, but only represent relative positional relationships, and not absolute positional relationships.

As shown in fig. 1-5, a 2-chloroacrylonitrile wastewater recovery device comprises a distillation kettle 1, wherein one end of the distillation kettle 1 is provided with a feed inlet 2, the other end of the distillation kettle 1 is provided with a support frame 3 and a discharge outlet 4, the support frame 3 is arranged around the discharge outlet 4, a distillation cavity 5 is arranged in the distillation kettle 1, and a rectification column 6 is arranged at one end, far away from the support frame 3, of the distillation cavity 5; the distillation device is characterized in that a motor 7 is arranged at one end, far away from the feed inlet 2, of the distillation cavity 5, a supporting rod 8 is arranged between the motor 7 and the rectification column 6, one end of the supporting rod 8 is rotationally connected with the motor 7, and the other end of the supporting rod 8 is rotationally connected with one end, facing the motor 7, of the rectification column 6; a hollow crushing device 9 is arranged between the rectifying column 6 and the motor 7, the inner wall of the crushing device 9 comprises a plurality of grooves 10, the grooves 10 are formed by recessing the inner wall of the crushing device 9 to the outer wall of the crushing device 9, and the adjacent grooves 10 are arranged in a hollowed manner; a blocking device 11 is arranged in the crushing device 9, a bubble removing cavity 12 is arranged between the blocking device 11 and the inner wall of the crushing device 9, and the supporting rod 8 passes through the crushing device 9 and the blocking device 11; a plurality of stirring blades 13 are arranged between the crushing device 9 and the motor 7, and the stirring blades 13 are connected with the supporting rods 8. Distillation is a thermodynamic separation process that utilizes the difference in boiling points of the components of a mixed liquid or liquid-solid system to vaporize the lower boiling components and recondensing to separate the entire components, a combination of both the vaporizing and condensing unit operations. Compared with other separation means, such as extraction, adsorption, etc., it has the advantage that no other solvents than the system components need to be used, thus ensuring that no new impurities are introduced. By utilizing the principle, the device adopts the distillation kettle 1 as a wastewater recovery device to treat wastewater generated during the production of 2-chloroacrylonitrile. The working principle of the device is as follows: the wastewater after simple treatment enters the distillation cavity 5 through the feed inlet 2, and the distillation kettle 1 starts to heat the wastewater. In order to ensure uniform heating, the device is provided with the motor 7, the supporting rod 8 and the stirring blade 13, the motor 7 drives the stirring blade 13 to rotate, and the rotating stirring blade 13 stirs the wastewater. Since the wastewater contains various impurities, the wastewater is very likely to generate foam during the stirring process. To solve the foam, the solution introduces a breaking device 9 and a blocking device 11. The crushing device 9 and the blocking device 11 are driven by the supporting rod 8 to rotate, and at the moment, a part of foam is scattered by the hollowed-out area of the crushing device 9; and part of foam enters the foam removing cavity 12 through the hollowed-out area, the part of foam is converged into the groove 10 and then is thrown to the periphery along the groove 10, and the part of foam is contacted with the inner wall of the distillation kettle and then is broken. Wherein, the blocking device 11 and the groove 10 limit the emergent direction of the foam, thereby ensuring that the foam can finally collide with the inner wall of the distillation still 1. In order to further increase the distillation purity, the scheme also introduces a rectifying column 6, and water vapor generated when the wastewater is heated is purified again through the rectifying column 6. In order to ensure the rotation stability of the support rod 8, one end of the support rod 8 is rotatably connected with the rectifying column 6. And the liquid remained after the distillation is completed is recycled through the discharge port 4.

In summary, the device has the following advantages: firstly, the waste water is heated by a distillation kettle 1 by utilizing the distillation principle, so that the waste water is purified, and impurities contained in the waste water are reduced; secondly, in order to ensure that the distillation kettle 1 can be heated uniformly, the device introduces a motor 7 and stirring blades 13, and the wastewater can be heated sufficiently and uniformly by using a stirring mode; thirdly, foam generated in the stirring process is removed by utilizing the crushing device 9 and the blocking device 11, so that the problem of insufficient distillation of wastewater is avoided; and fourthly, the distillation effect of the wastewater is further improved by utilizing the rectification column 6.

As shown in fig. 3, in order to enable the foam to uniformly enter the foam removing cavity 12, the crushing device 9 and the blocking device 11 are both circular truncated cones or cones, and the axis of the crushing device 9 and the axis of the blocking device 11 are both coincident with the axis of the supporting rod 8.

In order to facilitate the mounting of the blocking means 11 into the cavity of the crushing means 9, the outer dimension of said blocking means 11 is smaller than the inner dimension of the crushing means 9, said blocking means 11 being sleeved with the crushing means 9. This design also leaves a sufficiently large space for the de-bubbling chamber 12, avoiding the situation that the blocking means 11 is in close contact with the crushing means 9.

In order to avoid oversized hollow areas, foam is caused to enter the bubble removal chamber 12 from one hollow area and then flow out from the other hollow area. A series of circular through holes 14 are arranged between the adjacent grooves 10, one ends of the through holes 14 are connected with the inner wall of the crushing device 9, and the other ends of the through holes 14 are connected with the outer wall of the crushing device 9.

For facilitating steam entering the rectifying column 6 to complete the rectifying process, preferably, a base 15 is installed at one end of the rectifying column 6, a gas collecting device 16 is installed at the other end of the rectifying column 6, a vacuum interlayer 17 and a filler 18 are arranged between the base 15 and the gas collecting device 16, the vacuum interlayer 17 is arranged around the filler 18, the base comprises a plurality of ventilation pores 19, and the length direction of the ventilation pores 19 is the same as the length direction of the rectifying column 6. The filler in the scheme is one or a plurality of combinations of Raschig rings, spiral rings, porcelain rings with partition plates, ceramic corrugated fillers, metal corrugated fillers, wood grid fillers, wire mesh fillers, porcelain rings, steel filler rings, saddle-shaped expects, quick coke, quartz and glass springs. The gas is fed from capillary holes 19 of the base 15, and passes through the gaps of the filler layer continuously in countercurrent with the liquid, and on the surface of the filler 18, the gas and liquid phases are in close contact for mass transfer. The liquid will return from the capillary holes 19 to the still pot and the vapour will be sent to the outside through the gas collecting means 16. While the vacuum interlayer 17 serves to insulate and protect the filler 18.

In order to further protect the rectifying column 6, it is preferable that a protective housing 20 is sleeved on the periphery of the rectifying column 6, the length of the protective housing 20 is the same as the length of the rectifying column 6, and a transparent plate 21 is mounted on the side surface of the protective housing 20. Since the vacuum interlayer 17 is generally made of transparent glass, it is fragile, and for this purpose, a protective shell 20 is needed to protect the vacuum interlayer. And for the convenience of observation, the side wall of the protective case 20 is mounted with a transparent plate 21.

For conveniently collecting steam, the side wall of the distillation still 1 is provided with a liquid inlet 22, one end of the liquid inlet 22 far away from the distillation still 1 is communicated with a reflux tank 23, a guide pipe 24 is arranged between the gas collecting device 16 and the reflux tank 23, one end of the guide pipe 24 is communicated with the gas collecting device 16, and the other end of the guide pipe 24 is communicated with the reflux tank 23. While the function of the inlet 22 is to facilitate the return of part of the recovered water in the return tank 23 to the still 1. The reflux drum 23 is internally provided with a cooling device, and the steam is condensed into water under the influence of the cooling device. For detecting water quality, preferably, a diverter valve 25 is installed at one end of the backflow tank 23, a first COD detection device 26 is installed at one end of the backflow tank 23 far away from the diverter valve 25, a loop pipe 27 is disposed between the liquid inlet 22 and the diverter valve 25, one end of the loop pipe 27 is communicated with the diverter valve 25, and the other end of the loop pipe 27 is communicated with the liquid inlet 22. The parameters of total phosphorus/total nitrogen/ammonia nitrogen, COD, BOD and the like of the reuse water are detected and rapidly measured by the first COD detection device 26, and when the process water index in the reflux tank 23 is qualified, the intercepting reflux ratio is 1:2, when the COD content of the process water in the reflux tank 23 is more than 20mg/L, the diverter valve 25 is closed, interception is stopped, the reflux is continued until the index of the process water is qualified, and then the diverter valve 25 is automatically opened.

For convenient secondary detection recovery quality of water, preferably, the one end that the shunt valve 25 kept away from first COD detection device 26 is connected with the drain pipe 28, the one end that the drain pipe 28 kept away from the shunt valve 25 is connected with detection jar 29, the one end of detection jar 29 is provided with second COD detection device 30, the other end of detection jar 29 is provided with gets liquid mouth 31. The water intercepted from the reflux tank 23 is monitored secondarily, the detection accuracy is improved, the first COD detection device 26 in the reflux tank 23 is prevented from being failed or has larger indication deviation, and meanwhile, the second COD detection device 30 and the diverter valve 25 are also arranged in a linkage manner.

In order to remove salt and chemical impurities, preferably, a plate frame extruder 32 is connected to the end of the feed inlet 2 away from the distillation still 1.

The present utility model is not limited to the above-described specific embodiments, and various modifications may be made by those skilled in the art without inventive effort from the above-described concepts, and fall within the scope of the present utility model.

Claims

1. The utility model provides a 2-chloroacrylonitrile effluent recycling device, includes the stills, the one end of stills is provided with the feed inlet, and the other end of stills is provided with support frame and discharge gate, the support frame sets up its characterized in that around the discharge gate: a distillation cavity is arranged in the distillation kettle, and a rectification column is arranged at one end, far away from the support frame, of the distillation cavity; the distillation device comprises a distillation cavity, a feeding port, a rectifying column, a motor, a supporting rod, a motor and a support rod, wherein the motor is arranged at one end of the distillation cavity, which is far away from the feeding port, the supporting rod is arranged between the motor and the rectifying column, one end of the supporting rod is rotationally connected with the motor, and the other end of the supporting rod is rotationally connected with one end of the rectifying column, which faces towards the motor; a hollow crushing device is arranged between the rectifying column and the motor, the inner wall of the crushing device comprises a plurality of grooves, the grooves are formed by recessing from the inner wall of the crushing device to the outer wall of the crushing device, and the adjacent grooves are arranged in a hollowed-out manner; a blocking device is arranged in the crushing device, a bubble removing cavity is arranged between the blocking device and the inner wall of the crushing device, and the supporting rod penetrates through the crushing device and the blocking device; a plurality of stirring blades are arranged between the crushing device and the motor, and the stirring blades are connected with the supporting rods.

2. The 2-chloroacrylonitrile wastewater recovery device according to claim 1, wherein: the crushing device and the blocking device are both round tables or cones, and the axes of the crushing device and the blocking device are both coincident with the axis of the supporting rod.

3. The 2-chloroacrylonitrile wastewater recovery device according to claim 2, wherein: the outer outline size of the blocking device is smaller than the inner outline size of the crushing device, and the blocking device is sleeved with the crushing device.

4. The 2-chloroacrylonitrile wastewater recovery device according to claim 1, wherein: a series of circular through holes are arranged between the adjacent grooves, one end of each through hole is connected with the inner wall of the crushing device, and the other end of each through hole is connected with the outer wall of the crushing device.

5. The 2-chloroacrylonitrile wastewater recovery device according to claim 1, wherein: the base is installed to the one end of rectifying column, gas collecting device is installed to the other end of rectifying column, be provided with vacuum intermediate layer and filler between base and the gas collecting device, the vacuum intermediate layer sets up around the filler, the base includes a plurality of pore of ventilating, the length direction of pore of ventilating is the same with the length direction of rectifying column.

6. The 2-chloroacrylonitrile wastewater recovery device according to claim 5, wherein: the periphery cover of rectifying column is equipped with the protective housing, the length of protective housing is the same with the length of rectifying column, transparent plate is installed to the side of protective housing.

7. The 2-chloroacrylonitrile wastewater recovery device according to claim 5, wherein: the side wall of the distillation still is provided with a liquid inlet, one end of the liquid inlet, which is far away from the distillation still, is communicated with a reflux tank, a guide pipe is arranged between the gas collecting device and the reflux tank, one end of the guide pipe is communicated with the gas collecting device, and the other end of the guide pipe is communicated with the reflux tank.

8. The 2-chloroacrylonitrile wastewater recovery device as claimed in claim 7, wherein: the one end of backward flow jar is installed the flow divider, the first COD detection device is installed to the one end that the backward flow jar kept away from the flow divider, be provided with return circuit pipeline between inlet and the flow divider, return circuit pipeline's one end and flow divider intercommunication, return circuit pipeline's the other end and inlet intercommunication.

9. The 2-chloroacrylonitrile wastewater recovery device as claimed in claim 8, wherein: the one end that first COD detection device was kept away from to the shunt valve is connected with the drain pipe, the one end that the shunt valve was kept away from to the drain pipe is connected with the detection jar, the one end of detection jar is provided with second COD detection device, the other end of detection jar is provided with gets the liquid mouth.

10. The 2-chloroacrylonitrile wastewater recovery device according to claim 1, wherein: one end of the feed inlet, which is far away from the distillation still, is connected with a plate frame extruder.