CN214880338U

CN214880338U - Vacuum disc evaporation system

Info

Publication number: CN214880338U
Application number: CN202121137096.8U
Authority: CN
Inventors: 路建伟; 刘威; 张扬洋
Original assignee: Kunshan Wsd Environmental Protection Equipment Co ltd
Current assignee: Kunshan Wsd Environmental Protection Equipment Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-11-26
Anticipated expiration: 2031-05-26

Abstract

The utility model provides a vacuum disk evaporation system, it includes: a vacuum evaporation tank, wherein an evaporation chamber is formed inside the vacuum evaporation tank; the evaporation disc is arranged in the evaporation chamber and the inside of the evaporation disc is hollow; a scraper for scraping off evaporation residues formed on the surface of the evaporation tray; the hollow shaft drives the evaporation disc to rotate, and the hollow shaft is communicated with the inside of the evaporation disc; the stock solution supply device is used for spraying stock solution to be evaporated to the surface of the evaporation disc; and the vapor compressor is used for introducing compressed vapor into the hollow shaft, the vapor compressor comprises an air inlet end and an air outlet end, the air outlet end is connected with one end of the hollow shaft, the vapor passes through the inside of the evaporation disc and is discharged from the other end of the hollow shaft, and the air inlet end is communicated with the evaporation chamber. So set up, can carry out effectual recycle with the steam that the stoste evaporation is gained, saved evaporation system's energy consumption, greatly reduced the running cost of this system when reinforcing evaporation efficiency.

Description

Vacuum disc evaporation system

Technical Field

The utility model relates to an evaporation technology field especially relates to a vacuum disk evaporation system.

Background

The disc evaporation technology is an efficient and environment-friendly energy-saving technology, and can be widely applied to the industrial production fields of chemical industry, seawater desalination, sewage treatment and the like. Take sewage treatment as an example, after steam evaporation, can follow and draw out the distilled water that accords with emission standard from the sewage, this distilled water can directly discharge, and remaining evaporation residue is collected again and is carried out centralized processing and can the greatly reduced sewage treatment cost of enterprise. In addition, the disc type evaporation has the advantages of large heat exchange area, high evaporation efficiency, timely collection of evaporation residues and the like, so that the disc type evaporation is favored by users.

The conventional disc type evaporation device generally supplies heat by directly using an external steam heat source, and the evaporation temperature is high, the efficiency is low, the energy consumption is high, so that the energy consumption of an evaporation system is high, and the operation cost of the system is high. And the steam generated by the surface evaporation of the sewage is not effectively recycled, so that the energy waste is caused.

Therefore, it is necessary to design a vacuum tray evaporation system to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vacuum disk evaporation system that the energy consumption is low, evaporation efficiency is high.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a vacuum tray evaporation system, comprising:

a vacuum evaporation tank, wherein an evaporation chamber is formed inside the vacuum evaporation tank;

the evaporation disc is arranged in the evaporation chamber and the inside of the evaporation disc is hollow;

a scraper for scraping off evaporation residues formed on the surface of the evaporation tray;

the hollow shaft drives the evaporation disc to rotate, and the hollow shaft is communicated with the inside of the evaporation disc; the stock solution supply device is used for spraying stock solution to be evaporated to the surface of the evaporation disc; and

the vapor compressor is used for introducing compressed vapor into the hollow shaft, the vapor compressor comprises an air inlet end and an air outlet end, the air outlet end is connected with one end of the hollow shaft, the vapor passes through the inside of the evaporation disc and is discharged from the other end of the hollow shaft, and the air inlet end is communicated with the evaporation chamber.

As the utility model discloses further modified technical scheme still includes steam generator, steam generator locates the vacuum evaporation jar with between the steam compressor.

As a further improved technical scheme of the utility model, still include steam purification device, steam purification device is including locating the vacuum evaporation tank with spiral separator between the steam generator and locating steam filter screen on steam generator upper portion.

As the utility model discloses further modified technical scheme still includes stoste preheating device, stoste preheating device includes the stoste preheating tank and locates the inside heat exchanger of stoste preheating tank, the other end of quill shaft with the heat exchanger intercommunication, with to the heat exchanger provides the heat source.

As a further improved technical scheme of the utility model, the quill shaft with still be equipped with distilled water storage tank and distilled water pump between the heat exchanger to the control volume of distilled water that gets into in the heat exchanger.

As a further improved technical solution of the present invention, the other end of the hollow shaft is further connected with a proportional control valve, and the proportional control valve is used for controlling the air outlet end of the steam compressor and the pressure of the steam in the hollow shaft.

As the utility model discloses further modified technical scheme still includes material discharging device, material discharging device is including having barrel, screw rod actuating mechanism and the discharge port sealing device who collects mouth and discharge port, it is used for collecting the evaporation residue that falls from the evaporation dish to collect the mouth, discharge port sealing device supports the pressure mechanism including sealed end cap and elasticity, sealed end cap locates the discharge port outside and will the discharge port is sealed, elasticity supports the pressure mechanism will sealed end cap orientation the discharge port supports and presses.

As a further improved technical scheme of the present invention, the elastic pressing mechanism is an air cylinder, and the sealing plug is disposed at an end of a piston rod of the air cylinder; the end, facing the discharge port, of the sealing plug is provided with a conical surface, and the discharge port is provided with an inverted conical surface matched with the conical surface of the sealing plug.

As a further improved technical scheme of the utility model, stoste supplies liquid device includes feed liquor pump, feed liquor pipeline and stoste shower nozzle.

As a modified technical scheme of the utility model, the both sides of evaporating dish all are equipped with the stoste shower nozzle reaches the scraper, the stoste shower nozzle is close to the axle center setting of evaporating dish, scraper and stoste shower nozzle all are located both sides about the evaporating dish is located to the latter half of evaporating dish and branch.

As the utility model discloses further modified technical scheme still includes stoste circulating device, stoste circulating device includes stoste accumulator and the stoste circulating groove that links to each other through the pipeline, and stoste accumulator is located the evaporating dish below and collects unnecessary stoste on the evaporating dish, the stoste circulating groove with the feed liquor pump is connected.

As a further improved technical scheme of the utility model, wear out at the quill shaft both ends the vacuum evaporation tank, the quill shaft drives through the speed reducer.

According to the above technical scheme, the utility model discloses a set up steam compressor and provide high temperature high pressure steam as the heat source for the evaporating dish to be linked together vacuum evaporation tank and steam compressor, for the vacuum evaporation tank provides the negative pressure on the one hand, on the other hand can carry out effectual recycle with the steam of stoste evaporation gained, has saved vacuum disk evaporation system's energy consumption, has reduced this system running cost when reinforcing evaporation efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a vacuum tray evaporation system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram illustrating the circulation of the stock solution in the vacuum tray evaporation system according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of the material discharge apparatus in fig. 2.

FIG. 4 is a schematic structural view of a material discharge apparatus according to another embodiment

Fig. 5 is a diagram illustrating a positional relationship between a scraper and a raw liquid nozzle on one side of an evaporation pan according to an embodiment of the present invention.

FIG. 6 is a diagram showing the positional relationship between the doctor blade and the raw liquid spray head on the other side of the evaporation pan in FIG. 5.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Please refer to fig. 1, which shows a vacuum tray evaporation system, comprising: the device comprises a vacuum evaporation tank 1, an evaporation tray 2, a scraper 3, a hollow shaft 4, a steam compressor 5 and a stock solution supply device 10. An evaporation chamber is formed in the vacuum evaporation tank 1, and the evaporation tray 2 is arranged in the evaporation chamber and is hollow inside. The hollow shaft 4 is horizontally arranged in the vacuum evaporation tank 1, two ends of the hollow shaft 4 penetrate out of the vacuum evaporation tank 1, and the hollow shaft 4 is driven by a speed reducer and drives the evaporation disc 2 to rotate. In this embodiment, the number of the evaporation pan 2 is plural, the plural evaporation pan 2 are arranged along the axial direction of the hollow shaft 4, and the hollow shaft 4 is communicated with the inside of the evaporation pan 2.

The vapor compressor 5 is used for providing high-temperature and high-pressure vapor for the hollow shaft and the evaporation disc and introducing compressed vapor into the hollow shaft, and comprises an air inlet end and an air outlet end, the air outlet end is connected with one end of the hollow shaft, the vapor passes through the inside of the evaporation disc and is discharged from the other end of the hollow shaft, and the air inlet end is communicated with the evaporation chamber.

The utility model discloses in, except that the stock solution evaporation in the vacuum evaporation jar 1 provides steam to vapor compressor, still need provide initial steam in order to start evaporation process to vapor compressor 5. Preferably, in the present embodiment, the vacuum tray evaporation system further comprises a steam generator 6 for providing initial steam, and the steam generator 6 is disposed between the vacuum evaporation tank 1 and the steam compressor 5. In operation, first pure water, which may be obtained from tap water by means of a reverse osmosis system, is fed into the steam generator 6. Initial steam generated by the steam generator 6 enters the steam compressor 5 to be pressurized and heated to form high-temperature and high-pressure steam, and the high-temperature and high-pressure steam is introduced into the hollow shaft 4 and further into the evaporation disc 2 and exchanges heat with stock solution on the surface of the evaporation disc 2. In other embodiments, the vapor compressor 5 may be directly externally connected to a vapor source to supply the initial vapor.

The high-temperature high-pressure steam is changed into a mixture of steam and distilled water with lower temperature after heat exchange, and is discharged from the other end of the hollow shaft 4. The other end of the hollow shaft 2 is also connected with a proportional control valve 8, and the proportional control valve 8 is used for controlling the air outlet end of the steam compressor 5 and the pressure of the steam in the hollow shaft 4. On the one hand, the proportional control valve 8 controls the steam compressor 5 to provide high-temperature high-pressure steam with a stable state, and on the other hand, the proportional control valve 8 can indirectly control the pressure at the air inlet end of the steam compressor 5 by controlling the steam pressure at the air outlet end of the steam compressor 5, so that the negative pressure in the vacuum evaporation tank 1 is in a stable state, and the arrangement improves the stability of the operation of the vacuum disc type evaporation system.

In the evaporation process, vapor compressor 5 continuously extracts steam from vacuum evaporation tank 1 through the pipeline, so can form the negative pressure state in vacuum evaporation tank 1, so set up, reduced the required temperature of stoste evaporation, and then improved evaporation efficiency.

The stock solution supply device 10 is used for spraying stock solution to be evaporated to the surface of the evaporation tray 2, and the stock solution on the surface of the evaporation tray 2 is evaporated by heat to generate steam and evaporation residues. The scraper 3 is used to scrape off evaporation residue formed on the surface of the evaporation pan 2. Specifically, the raw liquid supply device 10 includes a liquid inlet pump 101, a liquid inlet pipeline 102, and a raw liquid spray head 103. Both sides of the evaporation pan 2 are provided with a stock solution spray head 103 and a scraper 3.

Referring to fig. 3 and 4, in the present embodiment, the raw liquid spray head 103 is disposed near the axis of the evaporation pan 2, and the scraper 3 and the raw liquid spray head 103 are both disposed at the lower half portion of the evaporation pan 2 and are disposed at the left and right sides of the evaporation pan 2. Specifically, the axis of the evaporation pan 2 is taken as the origin, a transverse line passing through the axis is taken as a transverse axis, a longitudinal line passing through the axis is taken as a longitudinal axis, the transverse axis and the longitudinal axis divide the evaporation pan 2 into four quadrants, the evaporation pan 2 rotates counterclockwise when viewed from one side of the evaporation pan 2, the stock solution spray head 103 is located in the fourth quadrant, and the scraper 3 is located in the third quadrant; when viewed from the other side of the evaporation pan 2, the evaporation pan 2 rotates clockwise, the stock solution ejection head 103 is located in the third quadrant, and the doctor blade 3 is located in the fourth quadrant.

Referring to fig. 1 to 3, preferably, the vacuum tray evaporation system further includes a raw liquid circulation device 20, the raw liquid circulation device 20 includes a raw liquid recovery tank 201 and a raw liquid circulation tank 202 connected by a pipeline, the raw liquid recovery tank 202 is located below the evaporation pan 2 to collect excess raw liquid on the evaporation pan 2, and the raw liquid circulation tank 201 is connected to the liquid inlet pump 101, that is, the raw liquid recovery tank 201, the raw liquid circulation tank 202, the liquid inlet pump 101, the liquid inlet pipeline 102 and the raw liquid spray head 103 form a raw liquid circulation loop.

Referring to fig. 1, the vacuum tray evaporation system further includes a steam purification device, and the steam purification device includes a spiral separator 71 disposed between the vacuum evaporation tank 1 and the steam generator 6, and a steam filter screen 72 disposed on the upper portion of the steam generator 6. The steam evaporated from the stock solution in the vacuum evaporation tank 1 carries part of the liquid and solid impurities, the mixture firstly enters the spiral separator 71, when the mixture contacts with the spiral blade of the spiral separator 71, the liquid and solid impurities in the mixture attach to the surface of the spiral blade and flow down along the surface of the spiral blade, the steam in the mixture spirally upwards and gradually separates out, and the primary purification of the steam is completed in the spiral separator 71. The steam then enters the steam generator 6 and is further filtered through the steam filter 72 at the upper portion thereof to further remove impurities. The spiral separator 71 is also externally connected with a defoaming device 9, the defoaming device 9 is used for providing defoaming agent into the spiral separator 71, and a defoaming agent inlet valve 91 is also arranged between the defoaming device 9 and the spiral separator 71.

The vacuum disc evaporation system further comprises a stock solution preheating device 30, wherein the stock solution preheating device 30 comprises a stock solution preheating tank 301 and a heat exchanger 302 arranged inside the stock solution preheating tank 301. The other end of the hollow shaft 4 communicates with the heat exchanger 302 to provide a heat source to the heat exchanger 302.

The temperature of the mixture of steam and distilled water discharged from the other end of the hollow shaft 4 is about 80 ℃, and therefore the proportion of distilled water is high. Preferably, a distilled water storage tank 305 and a distilled water pump 306 are further arranged between the hollow shaft 4 and the heat exchanger 302 to control the amount of distilled water entering the heat exchanger 302. The distilled water storage tank 305 separates the mixture of the steam and the distilled water discharged into the distilled water storage tank 305, wherein the distilled water falls into the bottom of the distilled water storage tank 305 by gravity, and the steam is light and remains in the upper part of the distilled water storage tank 305. The distilled water pump 306 pumps the distilled water in the distilled water storage tank 305 into the heat exchanger 302, exchanges heat with the stock solution to be preheated in the stock solution preheating tank 301, and then flows out, and is provided with a condensed water tank 307 for collection. In addition, an exhaust gas treatment system 308 is connected to an upper end of the distilled water storage tank 305 to purify and discharge the upper steam.

Referring to fig. 1 and 2, the vacuum disc evaporation system further includes a material discharging device 40 for discharging the evaporation residue scraped off by the scraper 3 out of the vacuum evaporation tank 1. Referring also to fig. 5, the material discharge device 40 includes a cylinder 401 having a collection port 4011 and a discharge port 4012, a screw 402, a screw drive mechanism 403, and a discharge port sealing device. The collection port 4011 is connected with the tank body of the vacuum evaporation tank 1 in a sealing way and is used for collecting evaporation residues falling from the evaporation tray 2. Referring to fig. 3, preferably, a guide plate 11 is further disposed between the collection port 4011 and the canister body of the vacuum evaporation canister 1, the guide plate 11 is disposed obliquely below the scraper 3, and a lower end of the guide plate 11 is connected to the collection port 4011 to guide the evaporation residue scraped off by the scraper 3 into the collection port 4011.

The discharge port 4012 is located outside the vacuum evaporation can 1, and is used for discharging the evaporation residue out of the vacuum evaporation can 1. The cylinder 401 is substantially cylindrical and extends in the direction of arrangement of the evaporation pan 2, and the screw 402 is provided inside the cylinder 401. The barrel 401 is divided into a collecting section and an extruding section in the axial direction of the screw 402. The collecting port 4011 is opened at the collecting section and is arranged corresponding to the scraper 3.

The utility model discloses in, collect mouthful 4011 and be a continuous rectangular shape opening, the evaporation residue that a plurality of scrapers 3 scraped is collected by this collection mouthful 4011. In another embodiment, referring to fig. 6, a plurality of collecting ports 4011 'may be provided at intervals, and a plurality of collecting ports 4012' correspond to the plurality of blades 3, respectively. The rear end of the cylinder 401 (the front end in the screw extrusion direction) is an extrusion section, and the discharge port 4012 is located at the end of the extrusion section. The extruded section of barrel 401 is a full cylinder whose wall cooperates with screw 402 for providing radially inward pressure and axially forward thrust to the evaporative residue.

The outlet port sealing means serves to dynamically seal the outlet port 4012. Specifically, as shown in fig. 5, the discharge port sealing device includes a sealing plug 404 and an elastic pressing mechanism 405, the sealing plug 404 is disposed outside the discharge port 4012 and seals the discharge port 4012, the elastic pressing mechanism 405 presses the sealing plug 404 toward the discharge port 4012, and when the screw 402 discharges the evaporation residue, the thrust of the evaporation residue on the sealing plug 404 is greater than the acting force of the elastic pressing mechanism 405 on the sealing plug 404.

In this embodiment, the screw driving mechanism 403 is preferably a motor, the elastic pressing mechanism 405 is an air cylinder, and the sealing plug 404 is disposed at an end of a piston rod of the air cylinder. Preferably, the end of the sealing plug 404 facing the outlet 4012 is provided with a tapered surface 4041, and the outlet 4012 is provided with an inverted conical surface matching the tapered surface 4041 of the sealing plug 404. In this embodiment, the sealing plug 404 is made of an elastic material, preferably a rubber material, so as to increase the sealing property.

When the evaporation residue is generated, the screw driving mechanism 403 continuously operates to drive the screw 402 to rotate, the evaporation residue is spirally extruded outwards in the barrel 102 along the axial direction of the screw 402, the thrust of the screw 402 acts on the tapered surface 4041 of the sealing plug 404 through the evaporation residue, the sealing plug 404 is extruded outwards for a certain gap, and the evaporation residue fills the gap to play a role of filling and sealing, and is continuously discharged outwards to the collecting barrel 50.

To sum up, the utility model discloses a vacuum disk evaporation system has following advantage:

1. the steam compressor is arranged to provide high-temperature and high-pressure steam for the evaporation tray as a heat source, and the vacuum evaporation tank is communicated with the steam compressor, so that negative pressure is provided for the vacuum evaporation tank, and the steam obtained by evaporation of the stock solution can be effectively recycled, the energy consumption of a vacuum tray type evaporation system is saved, the evaporation efficiency is enhanced, and the operation cost of the system is reduced;

2. by arranging the stock solution preheating device, the stock solution is preheated by using the mixture of the steam and the distilled water after heat exchange in the evaporation tray, so that the temperature of the stock solution entering the vacuum evaporation tank is increased, the heat required by evaporation of the stock solution is reduced, the energy consumption is further saved, and the cost is reduced;

3. the evaporation tray is arranged, so that the heat exchange area of the stock solution during evaporation is increased, the evaporation efficiency is high, evaporation residues can be timely collected through the scraper, evaporation can be continuously performed, and the influence of accumulation of the evaporation residues on the heat exchange efficiency is prevented;

4. through setting up the material eduction gear who adapts to vacuum environment, in time discharge the vacuum evaporation jar with the evaporation residue when guaranteeing vacuum evaporation jar in vacuum for the sustainable operation of vacuum disk evaporation system further improves the evaporation efficiency of this system and the handling capacity of stoste.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the technical personnel in the technical field should understand that the technical personnel in the technical field can still modify the present invention or substitute the same, and all the technical solutions and the improvements thereof that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A vacuum tray evaporation system, comprising:

the hollow shaft drives the evaporation disc to rotate, and the hollow shaft is communicated with the inside of the evaporation disc;

the stock solution supply device is used for spraying stock solution to be evaporated to the surface of the evaporation disc; and

2. The vacuum pan evaporation system of claim 1, further comprising a steam generator disposed between the vacuum evaporation canister and the steam compressor.

3. The vacuum tray evaporation system of claim 2, further comprising a steam purification device, wherein the steam purification device comprises a spiral separator arranged between the vacuum evaporation tank and the steam generator and a steam filter screen arranged at the upper part of the steam generator.

4. The vacuum tray evaporation system of claim 1, further comprising a raw liquid preheating device, wherein the raw liquid preheating device comprises a raw liquid preheating tank and a heat exchanger arranged inside the raw liquid preheating tank, and the other end of the hollow shaft is communicated with the heat exchanger to provide a heat source for the heat exchanger.

5. The vacuum disc evaporation system of claim 4, wherein a distilled water storage tank and a distilled water pump are further provided between the hollow shaft and the heat exchanger to control the amount of distilled water entering the heat exchanger.

6. The vacuum disc evaporation system of claim 1, wherein a proportional control valve is further connected to the other end of the hollow shaft, the proportional control valve being configured to control the pressure of the vapor in the hollow shaft and the outlet end of the vapor compressor.

7. The vacuum tray evaporation system of claim 1, further comprising a material discharge device, the material discharge device comprising a barrel having a collection port for collecting evaporation residue falling from the evaporation tray and a discharge port, a screw driving mechanism, and a discharge port sealing device, the discharge port sealing device comprising a sealing plug and an elastic pressing mechanism, the sealing plug being disposed outside the discharge port and sealing the discharge port, the elastic pressing mechanism pressing the sealing plug toward the discharge port.

8. The vacuum disc evaporation system according to claim 7, wherein the elastic pressing mechanism is a cylinder, and the sealing plug is arranged at an end of a piston rod of the cylinder; the end, facing the discharge port, of the sealing plug is provided with a conical surface, and the discharge port is provided with an inverted conical surface matched with the conical surface of the sealing plug.

9. The vacuum tray evaporation system of claim 1, wherein the stock solution supply device comprises a solution inlet pump, a solution inlet pipeline and a stock solution spray head.

10. The vacuum tray evaporation system of claim 9, wherein the stoste spray head and the scraper are disposed on both sides of the evaporation tray, the stoste spray head is disposed near the axis of the evaporation tray, and the scraper and the stoste spray head are disposed on the lower half portion of the evaporation tray and are disposed on the left and right sides of the evaporation tray.

11. The vacuum tray evaporation system of claim 9, further comprising a raw liquid circulation device, wherein the raw liquid circulation device comprises a raw liquid recovery tank and a raw liquid circulation tank which are connected through a pipeline, the raw liquid recovery tank is positioned below the evaporation tray to collect excess raw liquid on the evaporation tray, and the raw liquid circulation tank is connected with the liquid inlet pump.

12. The vacuum disc evaporation system of claim 1, wherein the hollow shaft passes out of the vacuum evaporation tank at both ends, and the hollow shaft is driven by a speed reducer.