阅读说明：本技术 水处理用多膜集成-蒸发结晶耦合系统 (Multi-membrane integration-evaporative crystallization coupling system for water treatment ) 是由 熊治 李志丰 潘盼 于 2021-08-23 设计创作，主要内容包括：本发明公开了水处理用多膜集成-蒸发结晶耦合系统,包括储料罐、蒸发器、气液分离器、送气装置以及结晶槽；所述储料罐和蒸发器之间设置有预热装置；所述蒸发器的顶端设置有排汽口；所述排汽口和预热装置连接,向预热装置内输送蒸汽；所述预热装置和蒸汽收集装置连接,将残余蒸汽送入蒸汽收集装置内。本发明的水处理用多膜集成-蒸发结晶耦合系统,通过设置预热装置,在污水进入蒸发器前,对污水进行预热,提高蒸发器蒸发速度；预热装置的热源采用蒸发器产生的蒸汽,一方面,对蒸汽中的热量进行利用,预热装置不需要外加热源,节约能源和使用成本；更重要的是,蒸汽对污水进行预热时,和污水换热,降低蒸汽温度,便于后续冷凝,提高水的回收效率。(The invention discloses a multi-membrane integration-evaporation crystallization coupling system for water treatment, which comprises a storage tank, an evaporator, a gas-liquid separator, a gas supply device and a crystallization tank, wherein the storage tank is provided with a storage tank; a preheating device is arranged between the storage tank and the evaporator; the top end of the evaporator is provided with a steam outlet; the steam outlet is connected with the preheating device and used for conveying steam into the preheating device; the preheating device is connected with the steam collecting device and sends the residual steam into the steam collecting device. According to the multi-membrane integration-evaporative crystallization coupling system for water treatment, the preheating device is arranged, so that the sewage is preheated before entering the evaporator, and the evaporation speed of the evaporator is increased; the heat source of the preheating device adopts the steam generated by the evaporator, on one hand, the heat in the steam is utilized, the preheating device does not need an external heating source, and the energy and the use cost are saved; more importantly, when the sewage is preheated by the steam, the steam exchanges heat with the sewage, the steam temperature is reduced, the subsequent condensation is facilitated, and the recovery efficiency of the water is improved.)

1. The multi-membrane integration-evaporative crystallization coupling system for water treatment comprises a storage tank (1), an evaporator (2), a gas-liquid separator (3), a gas supply device (4) and a crystallization tank (5);

the material storage tank (1) is connected with the evaporator (2) and used for conveying sewage into the evaporator (2); an aeration device (21) is arranged at the bottom end of the evaporator (2), and the air supply device (4) is connected with the aeration device (21); a steam collecting device (22) is arranged at the top end of the evaporator (2), and the steam collecting device (22) is connected with the gas-liquid separator (3); a drain outlet (23) is formed in the bottom end of the evaporator (2), the drain outlet (23) is connected with the crystallization tank (5), and the concentrated sewage is discharged into the crystallization tank (5); the method is characterized in that:

a preheating device (6) is arranged between the storage tank (1) and the evaporator (2); the top end of the evaporator (2) is provided with a steam outlet (24); the steam outlet (24) is connected with the preheating device (6) and used for conveying steam into the preheating device (6); the preheating device (6) is connected with the steam collecting device (22) and sends the residual steam into the steam collecting device (22).

2. The multi-membrane integrated-evaporative crystallization coupled system for water treatment as claimed in claim 1, wherein: the preheating device (6) comprises a first heat exchanger (61) and a second heat exchanger (62); the first heat exchanger (61) and the second heat exchanger (62) are sequentially arranged along the sewage flow direction; the steam outlet (24) is connected with a second heat exchanger (62); the second heat exchanger (62) is connected with the first heat exchanger (61); the first heat exchanger (61) is connected with a steam collecting device (22); the first heat exchanger (61) is provided with a first water storage tank (611).

3. The multi-membrane integrated-evaporative crystallization coupled system for water treatment as claimed in claim 2, wherein: the gas-liquid separator (3) is connected with the first heat exchanger (61) through a pipeline.

4. The multi-membrane integrated-evaporative crystallization coupled system for water treatment as claimed in claim 1, wherein: the aeration device (21) comprises a hollow disc body (211) and an aeration membrane (212); the aeration film (212) includes a plurality; the lower end of the aeration film (212) is inserted on the disc body (211) and is communicated with the inside of the disc body (211); the air supply device (4) is communicated with the disc body (211).

5. The multi-membrane integrated-evaporative crystallization coupled system for water treatment as claimed in claim 1, wherein: the steam collecting device (22) comprises a hollow collecting disc (221) and a heat exchange pipe (222); the collecting disc (221) is connected with the heat exchange tube (222); the heat exchange pipe (222) is connected with the gas-liquid separator (3); the collecting tray (221) is provided with a plurality of air inlet nozzles (2211).

6. The multi-membrane integrated-evaporative crystallization coupled system for water treatment as defined in claim 4, wherein: the air supply device (4) comprises a fan (41); the fan (41) is connected with the disc body (211) through a gas pipeline; and a filter (411) is arranged on a gas pipeline between the fan (41) and the disc body (211).

Technical Field

The invention relates to the technical field of sewage treatment equipment, in particular to a multi-membrane integration-evaporative crystallization coupling system for water treatment.

Background

Sewage treatment is a process of purifying sewage to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly used in daily life of common people.

Evaporative crystallization is a common method for sewage treatment, and the treatment technology is rapidly developed along with the enhancement of human resources and environmental awareness. However, the existing evaporative crystallization sewage treatment equipment has the following problems: firstly, the evaporation speed is low, the time of the whole process is long, and a large amount of time is consumed for sewage treatment; secondly, the heat utilization rate is low, and the heat in the steam is not utilized, so that the resource waste is caused; recovery rate is low, and partial steam is emptied, which causes waste of water resources and energy. Based on the above statement, how to design a multi-membrane integration-evaporative crystallization coupling system for water treatment is the technical problem to be solved by the invention.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a multi-membrane integration-evaporative crystallization coupling system for water treatment.

The invention solves the technical problems through the following technical means:

the multi-membrane integration-evaporation crystallization coupling system for water treatment comprises a storage tank, an evaporator, a gas-liquid separator, a gas supply device and a crystallization tank;

the storage tank is connected with the evaporator and used for conveying sewage into the evaporator; the bottom end of the evaporator is provided with an aeration device, and the air supply device is connected with the aeration device; the top end of the evaporator is provided with a steam collecting device, and the steam collecting device is connected with the gas-liquid separator; the bottom end of the evaporator is provided with a drain outlet, the drain outlet is connected with the crystallization tank, and the concentrated sewage is discharged into the crystallization tank;

a preheating device is arranged between the storage tank and the evaporator; the top end of the evaporator is provided with a steam outlet; the steam outlet is connected with the preheating device and used for conveying steam into the preheating device; the preheating device is connected with the steam collecting device and sends the residual steam into the steam collecting device.

As an improvement of the above technical solution, the multi-membrane integration-evaporative crystallization coupling system for water treatment comprises a preheating device and a heat exchanger, wherein the preheating device comprises a first heat exchanger and a second heat exchanger; the first heat exchanger and the second heat exchanger are sequentially arranged along the flow direction of the sewage; the steam outlet is connected with the second heat exchanger; the second heat exchanger is connected with the first heat exchanger; the first heat exchanger is connected with the steam collecting device; and a first water storage tank is arranged on the first heat exchanger.

As an improvement of the technical scheme, the gas-liquid separator is connected with the first heat exchanger through a pipeline.

As the improvement of the technical proposal, the multi-membrane integration-evaporative crystallization coupling system for water treatment comprises an aeration device, a water treatment device and a water treatment device, wherein the aeration device comprises a hollow disk body and an aeration membrane; the aeration membrane comprises a plurality of membranes; the lower end of the aeration film is inserted on the tray body and is communicated with the interior of the tray body; the air supply device is communicated with the tray body.

As the improvement of the technical proposal, the multi-membrane integration-evaporative crystallization coupling system for water treatment comprises a hollow collecting tray and a heat exchange tube; the collecting tray is connected with the heat exchange tube; the heat exchange tube is connected with the gas-liquid separator; the collecting tray is provided with a plurality of air inlet nozzles.

As an improvement of the technical scheme, the multi-membrane integration-evaporative crystallization coupling system for water treatment comprises a fan; the fan is connected with the disc body through a gas pipeline; and a filter is arranged on a gas pipeline between the fan and the disc body.

The invention has the advantages that: according to the multi-membrane integration-evaporative crystallization coupling system for water treatment, the preheating device is arranged, so that the sewage is preheated before entering the evaporator, and the evaporation speed of the evaporator is increased; the heat source of the preheating device adopts the steam generated by the evaporator, on one hand, the heat in the steam is utilized, the preheating device does not need an external heating source, and the energy and the use cost are saved; more importantly, when the sewage is preheated by the steam, the steam exchanges heat with the sewage, the steam temperature is reduced, the subsequent condensation is facilitated, and the recovery efficiency of the water is improved.

Drawings

FIG. 1 is a schematic structural diagram of a multi-membrane integration-evaporative crystallization coupling system for water treatment according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1, referring to the attached drawings, a multi-membrane integrated-evaporative crystallization coupling system for water treatment comprises a storage tank 1, an evaporator 2, a gas-liquid separator 3, a gas supply device 4 and a crystallization tank 5;

the material storage tank 1 is connected with the evaporator 2, and sewage is sent into the evaporator 2; the bottom end of the evaporator 2 is provided with an aeration device 21, and the air supply device 4 is connected with the aeration device 21; a steam collecting device 22 is arranged at the top end of the evaporator 2, and the steam collecting device 22 is connected with the gas-liquid separator 3; a drain outlet 23 is formed in the bottom end of the evaporator 2, the drain outlet 23 is connected with the crystallization tank 5, and the concentrated sewage is discharged into the crystallization tank 5;

a preheating device 6 is arranged between the material storage tank 1 and the evaporator 2; the top end of the evaporator 2 is provided with a steam outlet 24; the steam outlet 24 is connected with the preheating device 6 and used for conveying steam into the preheating device 6; the preheating device 6 is connected with the steam collecting device 22, and residual steam is sent into the steam collecting device 22;

by arranging the preheating device 6, the sewage is preheated before entering the evaporator 2, so that the evaporation speed of the evaporator is increased; the heat source of the preheating device 6 adopts the steam generated by the evaporator 2, on one hand, the heat in the steam is utilized, the preheating device 6 does not need an external heat source, and the energy and the use cost are saved; more importantly, when the sewage is preheated by the steam, the steam exchanges heat with the sewage, the steam temperature is reduced, the subsequent condensation is facilitated, and the recovery efficiency of water is improved;

when the sewage is specifically treated, the sewage enters the preheating device 6 from the storage tank 1, enters the evaporator 2 after being preheated, is evaporated and crystallized, certainly, in order to convey the sewage, the water pump 101 is arranged on a pipeline between the storage tank 1 and the evaporator 2, in order to accelerate the evaporation of the sewage, the heater 202 is arranged in the evaporator 2, and heats the sewage in the evaporator 2, during the evaporation, the air supply device 4 sends external air into the aeration device 21, the aeration device 21 carries out aeration treatment on the sewage, and the evaporation efficiency is improved by utilizing the entrainment effect of bubbles; part of the evaporated steam is collected by the steam collecting device 22 and then sent into the gas-liquid separator 3, and water is recovered after condensation; the other part is sent into a preheating device 6 through a pipeline to carry out preheating treatment on the sewage, part of steam after heat exchange is condensed into water to be collected, and part of uncondensed steam is sent into a steam collecting device 22 through a pipeline and then sent into a gas-liquid separator 3 to carry out gas-liquid separation;

according to the multi-membrane integration-evaporative crystallization coupling system for water treatment, the preheating device is arranged, so that the sewage is preheated before entering the evaporator, and the evaporation speed of the evaporator is increased; the heat source of the preheating device adopts the steam generated by the evaporator, on one hand, the heat in the steam is utilized, the preheating device does not need an external heating source, and the energy and the use cost are saved; more importantly, when the sewage is preheated by the steam, the steam exchanges heat with the sewage, the steam temperature is reduced, the subsequent condensation is facilitated, and the recovery efficiency of the water is improved.

As an improvement of the above technical solution; the preheating device 6 comprises a first heat exchanger 61 and a second heat exchanger 62; the first heat exchanger 61 and the second heat exchanger 62 are sequentially arranged along the sewage flow direction; the steam outlet 24 is connected with a second heat exchanger 62; the second heat exchanger 62 is connected with the first heat exchanger 61; the first heat exchanger 61 is connected with the steam collecting device 22; the first heat exchanger 61 is provided with a first water storage tank 611;

preheating device 6 adopts two heat exchangers, make steam and sewage carry out the heat transfer, carry out preheating to sewage, during the heat transfer, steam gets into second heat exchanger 62 from evaporimeter 2, reentrant first heat exchanger 61 after second heat exchanger 62 heat transfer, partial condensation behind the inside heat transfer of first heat exchanger 61, the comdenstion water is collected by first aqua storage tank 611, the part is sent into vapour and liquid separator 3 through steam collection device 22 and is condensed the recovery once more, of course, be provided with second aqua storage tank 31 on vapour and liquid separator 3, collect the water of vapour and liquid separator condensation, required energy when practicing thrift sewage evaporation crystallization greatly, improve evaporation crystallization efficiency.

As a modification of the above technical solution, the gas-liquid separator 3 is connected with the first heat exchanger 61 through a pipeline;

the gas-liquid separator 3 is connected with the first heat exchanger 61 through a pipeline, part of uncondensed steam enters the first heat exchanger 61 for heat exchange and condensation, steam circulation is formed among the preheating device 6, the steam collecting device 22 and the gas-liquid separator 3, the cooling of the steam, the preheating of sewage and the recovery of condensate water of the steam are completed in the circulating process, and the recovery efficiency and the resource utilization rate are greatly improved.

As an improvement of the above technical solution, the aeration device 21 comprises a hollow disc body 211 and an aeration membrane 212; the aeration film 212 includes a plurality; the lower end of the aeration film 212 is inserted on the tray body 211 and is communicated with the inside of the tray body 211; the air supply device 4 is communicated with the disc body 211;

the air supply device 4 sends air into the disc body 211, the air is sent into the aeration membrane 212 through the disc body 211, compact bubbles are generated after the air passes through the aeration membrane 212, and when the air passes through sewage, the feed liquid is evaporated by utilizing the gas-liquid entrainment effect of the bubbles to evaporate and crystallize the sewage, so that water resources are recovered.

As a modification of the above technical solution, the vapor collecting device 22 includes a hollow collecting tray 221 and a heat exchanging pipe 222; the collecting tray 221 is connected with the heat exchange pipe 222; the heat exchange pipe 222 is connected with the gas-liquid separator 3; a plurality of air inlet nozzles 2211 are arranged on the collecting disc 221;

steam enters the collecting tray 221 through the air inlet nozzle 2211 and then enters the gas-liquid separator 3 after passing through the heat exchange tube 222, and when the steam passes through the heat exchange tube 222, the steam exchanges heat with sewage in the evaporator 2, so that the temperature of the steam is reduced, subsequent condensation is facilitated, and on the other hand, the sewage is heated, so that the evaporation efficiency is improved, the overall energy utilization rate is high, and the requirements of energy conservation and emission reduction are met.

As an improvement of the above technical solution, the air supply device 4 includes a fan 41; the fan 41 is connected with the disc body 211 through a gas pipeline;

of course, in order to prevent dust or other contaminants in the air from entering the aeration apparatus 21, prevent the aeration membrane 212 from being clogged, and ensure the permeability of the aeration membrane 212, a filter 411 is disposed on the air pipe between the blower 41 and the disk 211.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.