CN212198555U

CN212198555U - Salt water filter equipment for alkali preparation

Info

Publication number: CN212198555U
Application number: CN202020495695.6U
Authority: CN
Inventors: 马龙; 李杨; 武磊; 毕少华; 王鹏; 王晓明; 王果园; 柴靖宇; 王婷
Original assignee: INNER MONGOLIA JUNZHENG CHLOR-ALKALI CHEMICAL TECHNOLOGY RESEARCH INSTITUTE; INNER MONGOLIA JUNZHENG CHEMICAL CO Ltd
Current assignee: INNER MONGOLIA JUNZHENG CHLOR-ALKALI CHEMICAL TECHNOLOGY RESEARCH INSTITUTE; INNER MONGOLIA JUNZHENG CHEMICAL CO Ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-12-22
Anticipated expiration: 2030-04-07

Abstract

The utility model provides a salt solution filter equipment for soda production, which is characterized in that the salt solution filter equipment comprises a salt solution pressure pump, a preprocessor, a pressure dissolved air tank and a front reaction tank, the traditional pretreatment and the membrane filtration are changed into the simple membrane filtration, the process flow is further shortened, the process power consumption is saved, ferric trichloride and compressed air are not required to be added in the process flow, and the production cost is further reduced; a preprocessor is eliminated, so that the depreciation cost of the preprocessor is saved; simple membrane filtration on Ca in crude salt²⁺、Mg²⁺Inversion (Mg)²⁺High content of Ca²⁺Low content) insensitivity, Ca²⁺、Mg²⁺The purchase cost of the inverted original salt is lower, and the production cost can be further reduced.

Description

Salt water filter equipment for alkali preparation

Technical Field

The utility model relates to an ion membrane method system alkali production technical field specifically is a salt solution filter equipment for system alkali.

Background

The brine filtration is an important process of soda production and aims at removing impurities such as calcium, magnesium, silt and the like in crude salt, and the ion membrane alkali-making process mainly comprises the steps of primary brine filtration, secondary brine filtration and electrolysis, light brine dechlorination and membrane method nitre removal, wherein the primary brine filtration is a primary process for ensuring the continuous and stable production of the whole system. The primary brine process mainly provides qualified brine with the temperature, concentration, pH and impurity particle content meeting the requirements for subsequent processes, the traditional primary brine filtering process adopts a pretreatment and membrane filtration mode to remove calcium and magnesium ions and insoluble mechanical impurities carried in original salt, and the prepared qualified brine requires Ca²⁺+Mg²⁺Less than 1ppm and SS less than or equal to 1 ppm. With the prolonging of the operation time, the service life of the preprocessor needs to be matched with a newly-built preprocessor and the preprocessor needs to be integrally overhauled, so that the investment is large and the construction period is long.

The authorization notice is with the number: CN201810607870.3, chinese patent, discloses a new process for primary brine refining, which has a short process flow, and omits a reactor with stirring, after salt melting, two alkalis are directly added, and conveyed to the inlet of a pre-precipitation barrel through a pump, and sodium hypochlorite is added at the inlet. The sedimentation bucket function includes: two alkalis fully react, inferior sodium removes microorganism and barrel bottom and regularly puts highly concentrated mud, later directly advances the SST membrane from the salt solution that the top overflow goes out and can reach each item requirement index of refined salt solution, and the utility model discloses a to salt solution filtration technology's research, update the membrane group in the salt solution filter, under the prerequisite of guaranteeing salt solution throughput and play water index, with traditional preliminary treatment + membrane filtration change for simple membrane filtration, shorten the whole process flow of salt solution, thoroughly avoid the restriction of preliminary treatment to salt solution steady production simultaneously.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above object, the utility model provides a following technical scheme: the brine filtering device for alkali production is characterized by comprising a brine pressurizing pump, a preprocessor, a pressurized dissolved air tank and a front reaction tank.

Further, preferably, the saline pressure pump is connected with a pressure dissolved air tank through a first pipeline, and the pressure dissolved air tank is connected with the preprocessor through a second pipeline.

Further, as preferable: the brine pressure pump is connected to the second pipeline through a bypass pipeline III on the first pipeline.

Further, as preferable: the first pipeline is provided with a check valve at one end connected with the brine pressure pump, two ends of the second pipeline are respectively provided with two gate valves, and the second pipeline is provided with an adjusting valve and a flowmeter and is used for controlling the production load of primary brine.

Further, as preferable: the brine pressure pumps connected with the preprocessor are arranged into two preprocessors, the two preprocessors are connected with the front reaction tank through a pipeline four, and the pipeline four is connected with a pipeline two.

Further, as preferable: the membrane group is set to SST membranes, each membrane group consists of 51 membrane tubes, the filtration area is 1.6 square meters, and the maximum filtration flux of the membrane group is more than or equal to 0.6m³/h。

Compared with the prior art, the beneficial effects of the utility model are that: the utility model adopts a novel SST membrane to replace the traditional salt water filtering membraneThe filtration process of the secondary brine is changed from traditional pretreatment and membrane filtration into simple membrane filtration, and compared with the prior art, the filtration process has the following characteristics: the process flow is further shortened, the process power consumption is saved, ferric trichloride and compressed air are not required to be added in the process flow, and the production cost is further reduced; a preprocessor is eliminated, so that the depreciation cost of the preprocessor is saved; simple membrane filtration on Ca in crude salt²⁺、Mg²⁺Inversion (Mg)²⁺High content of Ca²⁺Low content) insensitivity, Ca²⁺、Mg²⁺The purchase cost of the inverted original salt is lower, and the production cost can be further reduced.

Drawings

FIG. 1 is a block diagram of a brine filtration device for soda production;

FIG. 2 is a pipeline connection diagram of a brine filtering device for alkali production;

the reference numbers in the figures are: 1-saline water pressure pump, 2-preprocessor, 3-pressure dissolved air tank, 4-front reaction tank, 5-pipeline one, 6-pipeline two, 7-pipeline three, 8-pipeline four, 9-check valve, 10-regulating valve, 11, flowmeter and 12-gate valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a technical solution: the brine filtering device for alkali production is characterized by comprising a brine pressurizing pump 1, a preprocessor 2, a pressurized dissolved air tank 3 and a front reaction tank 4.

The brine pressure pump 1 is connected with the pressure dissolved air tank 3 through a first pipeline 5, and the pressure dissolved air tank 3 is connected with the preprocessor 2 through a second pipeline 6; the brine pressure pump 1 is connected with a second pipeline 6 through a third bypass pipeline 7 on the first pipeline 5; the first pipeline 5 is provided with a check valve 9 at one end connected with the brine pressure pump 1, two ends of the second pipeline 6 are respectively provided with two gate valves 12, and the second pipeline 6 is provided with an adjusting valve 10 and a flowmeter 11 and used for controlling the production load of primary brine.

The brine pressurizing pumps 1 connected with the preprocessor 2 are arranged into two preprocessors 2, the two preprocessors 2 are connected with the front reaction tank 4 through a pipeline four 8, and the pipeline four 8 is connected with a pipeline two 6.

The membrane group is set to be SST membrane, each membrane group is composed of 51 membrane tubes, the filtration area is 16 square meters, and the maximum filtration flux of the membrane group is more than or equal to 06m³And h, the process flow is further shortened, and the process power consumption is saved.

In actual work, a pipeline between a saline water pressurizing pump P-404A/B/C/D and a pressurized dissolved air tank Z-402A/B is provided with a bypass to be arranged in front of a self-control valve of a pretreatment V-405A/B outlet, and crude saline water is directly sent to a front reaction tank R-401A. Na is added into the front reaction tank R-401A₂CO₃Make Ca in the solution²⁺Precipitating, enabling crude brine to enter a brine filter after passing through a front reaction tank R-401A, a rear reaction tank R-401B and a buffer tank, enabling heated gas to sequentially enter the front reaction tank (R-401A), the rear reaction tank and the buffer tank from a preprocessor, and finally entering a membrane processor, and integrally replacing a membrane group in 5 brine filters with a novel SST membrane to realize Mg (OH)₂With CaCO₃And simultaneously removing insoluble mechanical impurities.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The brine filtering device for alkali production is characterized by comprising a brine pressurizing pump (1), a preprocessor (2), a pressurized dissolved air tank (3) and a front reaction tank (4);

the brine pressure pump (1) is connected with the pressure dissolved air tank (3) through a first pipeline (5), and the pressure dissolved air tank (3) is connected with the preprocessor (2) through a second pipeline (6);

the brine pressurizing pumps (1) connected with the preprocessors (2) are arranged into two preprocessors, the two preprocessors (2) are connected with the front reaction tank (4) through a pipeline four (8), and the pipeline four (8) is connected with a pipeline two (6).

2. The brine filtering device for alkali production as claimed in claim 1, wherein: the brine pressure pump (1) is connected with the second pipeline (6) through the first pipeline (5) and the third bypass pipeline (7).

3. The brine filtering device for alkali production as claimed in claim 2, wherein: the first pipeline (5) is provided with a check valve (9) at one end of the connection salt water pressure pump (1), two ends of the second pipeline (6) are respectively provided with two gate valves (12), and the second pipeline (6) is provided with an adjusting valve (10) and a flowmeter (11).

4. The brine filtering device for alkali production as claimed in claim 1, wherein: the membrane group is set to SST membrane, each membrane group is composed of 51 membrane tubes, the filtration area is 1.6 square meters, and the maximum filtration flux of the membrane group is more than or equal to 0.6m³/h。