WO2020233391A1

WO2020233391A1 - Crystallizer for treatment of salt-containing wastewater

Info

Publication number: WO2020233391A1
Application number: PCT/CN2020/088355
Authority: WO
Inventors: 树晓荣
Original assignee: 江苏嘉泰蒸发设备股份有限公司
Priority date: 2019-05-20
Filing date: 2020-04-30
Publication date: 2020-11-26
Also published as: CN210150755U

Abstract

Disclosed is a crystallizer for the treatment of salt-containing wastewater, the crystallizer comprising a crystallizer main body and a fixing frame. A first cavity is arranged at the lower end of the crystallizer main body, the upper end of the first cavity is higher than the liquid level of the crystallizer main body, a side wall of the first cavity is provided with a feeding pipe, the first cavity communicates with the crystallizer main body, a discharge port is provided at the upper end of the feeding pipe, an exhaust structure is arranged on the crystallizer main body, and a circulation structure is arranged on one side of the first cavity. The present invention relates to the technical field of the treatment of salt-containing wastewater. The crystallizer for the treatment of salt-containing wastewater uses the design of a barrel-type vertical elongate structure, wherein materials enter the crystallizer main body from the upper part of the crystallizer main body, formed solid particles fall from the upper part of the crystallizer main body to the bottom and are then exhausted from the crystallizer main body, and the first cavity higher than the liquid level of the crystallizer main body is formed in the lower end of the crystallizer main body and is used for exhausting gas.

Description

Crystallizer for treating salty wastewater

Technical field

The invention relates to the technical field of salt-containing wastewater treatment, in particular to a crystallizer for salt-containing wastewater treatment.

Background technique

Wastewater evaporator, based on the principle of evaporation, concentration and crystallization, uses multi-effect reduced pressure evaporation to concentrate and crystallize organic wastewater. After the salt in the concentrated solution is separated, the salt is recovered by the salt collector. The concentrated liquid is subjected to dry recovery or incineration treatment, and the evaporated condensate is generally treated by subsequent biochemical treatment, which can achieve the wastewater discharge standard.

Commonly used crystallizers are generally tank, OSLO, and DTB crystallizers. During use, especially in the environmental protection industry, most of the salt-containing wastewater contains organic matter, especially tar-containing substances. The salt is very viscous after precipitation in the crystallizer. Large; in the OSLO form of crystallizer, when the material enters the central circulation pipe in the evaporation chamber, it often sticks to the inner wall of the central circulation pipe. As the thickness of the sticking wall gradually increases, the diameter of the central circulation pipe becomes more and more. Small, long running time will block the central circulation pipe; for DTB crystallizer, no grain size materials, not only increase power consumption, but also have a series of problems such as mechanical failure; gap type crystallizer not only increases power consumption, but also has better efficiency In view of this, in-depth study of the above issues led to this case.

Summary of the invention

In view of the shortcomings of the prior art, the present invention provides a crystallizer for the treatment of salt-containing wastewater, which solves the problem that the existing crystallizer is prone to scaling and blockage during the process of treating the salt-containing wastewater.

In order to achieve the above objectives, the present invention is achieved through the following technical solutions: a crystallizer for salty wastewater treatment, comprising a crystallizer body and a fixing frame, a first cavity is installed on the lower end of the crystallizer body, and the first cavity The upper end of a cavity is higher than the liquid level of the main body of the crystallizer, a feed pipe is installed on the side wall of the first cavity and is connected to the main body of the crystallizer, and the upper end of the feed pipe is installed Discharge port, an exhaust structure is installed on the main body of the crystallizer, and a circulation structure is installed on one side of the first cavity;

The circulation structure includes: a material circulation part and a material heating part;

The material circulation part includes: a preheating water tank, a booster pump, a feed pipe and a return pipe;

The preheating water tank is installed on the right side of the fixed frame, the booster pump is installed on the preheating water tank, and the water inlet end of the preheating water tank is connected to the preheating water tank. The feed pipe is connected, the other end of the feed pipe is connected with the water outlet of the booster pump, one end of the return pipe is connected with the outlet, and the other end of the return pipe is connected with the outlet. The preheating water tank is connected.

Preferably, the material heating part includes: an electric heating wire, a heater, and a temperature sensor;

A U-shaped groove is opened on the outer side wall of the preheating water tank, the heating wire is embedded in the U-shaped groove, the heater is installed in the preheating water tank, and the temperature sensor is installed in the Said preheating water tank, and extends below the liquid surface.

Preferably, the exhaust structure includes: an evaporative air guide part and a steam condensing part;

The evaporating air guide part is installed between the crystallizer main body and the first cavity, and the steam condensing part is installed on the fixed frame, and is located on the left side of the crystallizer main body, and is connected to the The evaporating air guide is connected.

Preferably, the evaporative air guide portion includes: a cross baffle, a gas phase tube, and an air flow baffle;

The cross baffle is installed in the crystallizer main body, the gas phase tube is installed between the crystallizer main body and the first cavity, and its two ends are respectively connected to the crystallizer main body and the first cavity. The upper end surface of the body is connected, and the air flow baffle is arranged in the main body of the crystallizer and is located at the position of the exhaust port at the upper end of the main body of the crystallizer.

Preferably, the steam condensing part includes: a condensate water tank, a vacuum pump, and a cooling water supply component;

The condensate water tank is installed on the fixed frame and is located on the left side of the first cavity, and is connected with the crystallizer main body, and the vacuum pump is installed on the condensate water tank and is connected to the The condensate water tank is in communication, and the cooling water supply assembly is arranged on the left side of the condensate water tank.

Preferably, the cooling water supply assembly includes: a cooling water tank, a semiconductor refrigeration fin, a circulating pump and a cooling water pipe;

The cooling water tank is installed on the left side of the condensate water tank. The cooling surface of the semiconductor refrigeration fin is attached to the cooling water tank, and the circulating pump is installed on the cooling water tank and connected to the cooling water tank The cooling water pipe is sleeved on the outside of the condensate water tank, and its two ends are respectively communicated with the circulating pump and the cooling water tank.

Beneficial effect

The invention provides a crystallizer for treating salt-containing wastewater. It has the following beneficial effects: the crystallizer for salty wastewater treatment adopts a cylindrical vertical structure design. The material enters the crystallizer body at the upper part of the crystallizer body, and the formed solid particles hang from the upper part of the crystallizer body to the bottom. After being discharged out of the main body of the crystallizer, a first cavity higher than the liquid level of the main body of the crystallizer is installed at the lower end of the main body of the crystallizer for exhaust. The upper part of the material in the first cavity is clear liquid, and the circulation pump It is transported to the heat exchanger to be heated or cooled, and then sent to the upper part of the crystallizer body to circulate. The device has a simple structure and is not prone to scaling and clogging, which solves the problem that the existing crystallizer is prone to scaling in the process of treating salty wastewater. And the problem of clogging.

Description of the drawings

Fig. 1 is a schematic view of the front structure of a crystallizer for treating salt-containing wastewater according to the present invention.

Fig. 2 is a schematic top view of a crystallizer for treating salt-containing wastewater according to the present invention.

Fig. 3 is a partially enlarged schematic diagram of a crystallizer for treating salt-containing wastewater according to the present invention.

In the picture: 1- The main body of the crystallizer; 2- The fixed frame; 3- The first cavity; 4- Feed pipe; 5- Preheating water tank; 6-Booster pump; 7- Feed pipe; 8- Return pipe ; 9- electric heating wire; 10- heater; 11- temperature sensor; 12- cross baffle; 13- gas phase tube; 14- air flow baffle; 15- condensate tank; 16- vacuum pump; 17- cooling water tank; 18- semiconductor Refrigeration sheet; 19-circulation pump; 20-cooling water pipe.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Through the personnel in the field, connect all the electrical components in this case and their adapted power supply through wires, and should select the appropriate controller according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principles In the electrical connection, the electrical connection is completed in the order of the electrical components. The detailed connection method is a well-known technology in the field. The following mainly introduces the working principle and process, and does not explain the electrical control.

Example: As can be seen from Figures 1-3 of the specification, this case is a crystallizer for salty wastewater treatment, including a crystallizer body 1 and a fixing frame 2. The lower end of the crystallizer body 1 is provided with a first cavity 3, The upper end of a cavity 3 is higher than the liquid level of the main body 1 of the crystallizer. A feed pipe 4 is installed on the side wall of the first cavity 3 and communicated with the main body 1 of the crystallizer. The upper end of the feed pipe 4 is equipped with a discharge pipe.口, an exhaust structure is installed on the main body 1 of the mold, and a circulation structure is installed on one side of the first cavity 3;

The above-mentioned circulation structure includes: the material circulation part and the material heating part. The positional relationship and connection relationship are as follows:

The above-mentioned material circulation unit includes: the preheating water tank 5, the booster pump 6, the feed pipe 7 and the return pipe 8. The positional relationship and connection relationship are as follows:

The preheating water tank 5 is installed on the right side of the fixed frame 2, the booster pump 6 is installed on the preheating water tank 5, and its water inlet end is connected to the preheating water tank 5, and one end of the feeding pipe 7 is connected to the feeding pipe 4 , The other end of the feed pipe 7 is connected with the water outlet of the booster pump 6, one end of the return pipe 8 is connected with the discharge port, and the other end of the return pipe 8 is connected with the preheat water tank 5.

It can be seen from the above that when in use, the preheating tank 5 preheats the salt-containing industrial wastewater, and the preheated industrial wastewater is injected into the first chamber through the feed pipe 7 and the feed pipe 4 through the booster pump 6 The crystallizer body 1 at the upper end of the body 3 is evaporated and crystallized by the crystallizer body 1. The material enters the crystallizer body 1 at the upper part of the crystallizer body 1, and the formed solid particles move from the upper part of the crystallizer to the crystallizer body 1. After the bottom of the tank hangs, it is discharged out of the crystallizer body 1, and the incompletely evaporated liquid enters the preheating tank 5 through the return pipe 8 on the side wall of the first cavity 3 for circulating evaporation, and the high-temperature water vapor generated by the evaporation enters the discharge气 structure.

As a preferred solution, further, the material heating part includes: an electric heating wire 9, a heater 10, and a temperature sensor 11. The positional relationship and the connection relationship are as follows:

A U-shaped groove is opened on the outer wall surface of the preheating water tank 5, the heating wire 9 is embedded in the U-shaped groove, the heater 10 is installed in the preheating tank 5, and the temperature sensor 11 is installed in the preheating tank 5 and extending Into the liquid surface, when in use, the temperature sensor 11 detects the salty wastewater in the preheating water tank 5, and when the temperature in the preheating water tank 5 is lower than the set value, an electrical signal is sent to the controller, The controller controls the electric heating wire 9 to heat and heat the side wall of the preheating tank 5, and controls the heater 10 to heat the waste water in the preheating tank, so as to improve the efficiency of conversion and crystallization.

As a preferred solution, and further, the exhaust structure includes: an evaporative air guide part and a steam condensing part, the positional relationship and connection relationship of which are as follows:

The evaporation air guide is installed between the crystallizer main body 1 and the first cavity 3, and the steam condensing part is installed on the fixed frame 2, and is located on the left side of the crystallizer main body 1, and communicates with the evaporation air guide.

As a preferred solution, further, the evaporation air guide includes: a cross baffle 12, a gas phase pipe 13, and an air flow baffle 14. The positional relationship and connection relationship are as follows:

The cross baffle 12 is installed in the mold main body 1, and the gas phase tube 13 is installed between the mold main body 1 and the first cavity 3, and its two ends are respectively opposite to the upper end faces of the mold main body 1 and the first cavity 3 Connected, the air flow baffle 14 is installed in the crystallizer main body 1, and is located at the position of the exhaust port at the upper end of the crystallizer main body 1, facilitating rapid exhaust and quickly leading out the vapor generated by evaporation.

As a preferred solution, furthermore, the steam condensing part includes: a condensate tank 15, a vacuum pump 16, and a cooling water supply assembly, and the positional relationship and connection relationship are as follows:

The condensate water tank 15 is installed on the fixed frame 2 and is located on the left side of the first cavity 3 and is connected with the main body 1 of the mold. The vacuum pump 16 is installed on the condensate water tank 15 and communicates with the condensate water tank 15, and the cooling water The supply component is installed on the left side of the condensate tank 15, and the vacuum pump 16 is used to quickly export the high temperature water vapor generated by evaporation into the condensate tank 15, and cool the condensate tank 15 through the cooling water supply component to accelerate the cooling speed.

As a preferred solution, furthermore, the cooling water supply assembly includes: a cooling water tank 17, a semiconductor refrigeration fin 18, a circulating pump 19, and a cooling water pipe 20. The positional relationship and connection relationship are as follows:

The cooling water tank 17 is installed on the left side of the condensate water tank 15 and the cooling surface of the semiconductor cooling fin 18 is attached to the cooling water tank 17, the circulating pump 19 is installed on the cooling water tank 17, and is connected to the cooling water tank 17, and the cooling water pipe 20 is sleeved on The condensate tank 15 is outside, and its two ends are respectively connected to the circulating pump 19 and the cooling water tank 17. The semiconductor refrigeration fins 18 cool the cooling liquid in the cooling water tank 17, and the cooling liquid is poured into the cooling pipe through the circulating pump 19, and The condensate tank 15 is cooled by the cooling pipe.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes Other elements of, or also include elements inherent to this process, method, article or equipment. Without more restrictions. The sentence "including an element defined by ... does not exclude the existence of other identical elements in the process, method, article, or equipment including the element."

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A crystallizer for salty wastewater treatment, comprising a crystallizer body (1) and a fixing frame (2), characterized in that a first cavity (3) is installed on the lower end of the crystallizer body (1), and The upper end of the first cavity (3) is higher than the liquid level of the crystallizer main body (1), and a feed pipe (4) is installed on the side wall of the first cavity (3), and is connected with the crystallizer The main body (1) of the crystallizer is connected, the upper end of the feed pipe (4) is provided with a discharge port, the main body (1) of the crystallizer is provided with an exhaust structure, and the first cavity (3) is one There is a circulation structure on the side;

The circulation structure includes: a material circulation part and a material heating part;

The material circulation part includes: a preheating water tank (5), a booster pump (6), a feeding pipe (7) and a feeding pipe (8);

The preheating water tank (5) is installed on the right side of the fixing frame (2), the booster pump (6) is installed on the preheating tank (5), and its water inlet is connected to the preheating water tank (5). The hot water tank (5) is connected, one end of the feeding pipe (7) is connected to the feeding pipe (4), and the other end of the feeding pipe (7) is connected to the water outlet of the booster pump (6) The material return pipe (8) is communicated with the discharge port at one end, and the other end of the material return pipe (8) is communicated with the preheating water tank (5).
The crystallizer for treating salt-containing wastewater according to claim 1, wherein the material heating part comprises: an electric heating wire (9), a heater (10) and a temperature sensor (11);

A U-shaped groove is opened on the outer wall surface of the preheating water tank (5), the heating wire (9) is embedded in the U-shaped groove, and the heater (10) is installed in the preheating water tank ( In 5), the temperature sensor (11) is installed in the preheating water tank (5) and extends below the liquid surface.
The crystallizer for treating salt-containing wastewater according to claim 1, wherein the exhaust structure comprises: an evaporation air guide part and a steam condensation part;

The evaporating air guide part is installed between the crystallizer body (1) and the first cavity (3), and the steam condensing part is installed on the fixing frame (2) and is located in the crystallizer The left side of the main body (1) of the device is communicated with the evaporation air guide part.
The crystallizer for the treatment of salt-containing wastewater according to claim 3, characterized in that the evaporation air guide part comprises: a cross baffle (12), a gas phase pipe (13) and an air flow baffle (14);

The cross baffle (12) is installed in the crystallizer main body (1), and the gas phase tube (13) is installed between the crystallizer main body (1) and the first cavity (3), And its two ends are respectively communicated with the upper end surface of the crystallizer body (1) and the first cavity (3), and the airflow baffle (14) is installed in the crystallizer body (1) and is located in the crystallizer body (1). The position of the exhaust port at the upper end of the crystallizer body (1).
The crystallizer for treating salt-containing wastewater according to claim 3, wherein the steam condensing part comprises: a condensate tank (15), a vacuum pump (16) and a cooling water supply component;

The condensate tank (15) is installed on the fixing frame (2) and is located on the left side of the first cavity (3), and is connected with the crystallizer body (1), and the vacuum pump ( 16) Installed on the condensation water tank (15) and communicated with the condensation water tank (15), and the cooling water supply assembly is installed on the left side of the condensation water tank (15).
The crystallizer for treating salt-containing wastewater according to claim 5, wherein the cooling water supply assembly includes: a cooling water tank (17), a semiconductor refrigeration fin (18), a circulating pump (19) and a cooling Water pipe (20);

The cooling water tank (17) is installed on the left side of the condensate water tank (15). The cooling surface of the semiconductor refrigeration fin (18) is attached to the cooling water tank (17), and the circulating pump (19) is installed Is arranged on the cooling water tank (17) and communicates with the cooling water tank (17). The cooling water pipe (20) is sleeved on the outside of the condensate water tank (15), and its two ends are respectively connected to the circulating water The pump (19) and the cooling water tank (17) are connected.