CN108231230A - A kind of high salinity low level waste water processing system and method - Google Patents

Abstract

A high-salt-content low-radioactive wastewater treatment system: including a thermal cycle system and a cold cycle system, wherein the thermal cycle system includes a raw water tank, a peristaltic pump A, a filter, and a membrane module, wherein the raw water tank is connected to the peristaltic pump A, and the peristaltic pump A is connected to the filter, the filter is connected to the membrane module, and a flowmeter A and a thermometer C are installed in the filter and the membrane module, and the membrane module is connected to the raw water tank, and the thermometer B is set in the connection. A high-salt-content, low-radioactive wastewater treatment system method, comprising the following steps: S1: the production water is pumped to the membrane module through the peristaltic pump B in the cold water tank S2: the production water enters the refrigeration device after passing through the membrane module S3: the production water passes through the refrigeration device Then enter the cold water tank S4: After the low-level wastewater is heated in the original water tank, it enters the filter through the peristaltic pump A. S5: The low-level wastewater enters the membrane module after passing through the filter. The flow meter A and the thermometer C measure the flow and temperature respectively. S6: The low-level wastewater After the wastewater passes through the membrane module, it enters the raw water tank.

Description

A system and method for treating high-salt-content low-radioactive wastewater

technical field

The technology belongs to the field of waste water treatment, and specifically relates to a high-salt-content low-radioactive waste water treatment system and method.

Background technique

All links of the nuclear fuel nuclear cycle will produce low-level wastewater, such as low-level wastewater containing uranium and fluorine produced by uranium conversion and purification, low-level wastewater containing boric acid from nuclear power plants, various complex low-level wastewater from nuclear fuel reprocessing plants, and certain material production. High-salt low-level waste water generated during the process, etc. In order to protect the environment and human health, these wastewater must be treated safely, economically and effectively. Although such wastewater has been treated effectively, there are still problems such as complex treatment process, low efficiency and high cost. Especially for high-content (high-salt wastewater usually refers to wastewater with a mass fraction of total dissolved solids <TDS> of at least 3.5% <wastewater with a mass fraction of TDS greater than 1%>) can only be treated by traditional methods. Therefore, it is urgent to explore a treatment process with simple process flow, low application cost and high efficiency to realize the treatment of high-salinity and low-radioactive wastewater.

Contents of the invention

The purpose of the present invention is to provide a treatment system and method for high-salt low-level wastewater, which solves the technical problems in the treatment of high-salt low-level wastewater in the field of decommissioning of nuclear facilities, and realizes the discharge of such wastewater up to standard.

The technical scheme of the present invention is as follows: a high-salt-content, low-radioactive wastewater treatment system includes a thermal cycle system and a cold cycle system, wherein the thermal cycle system includes a raw water tank, a peristaltic pump A, a filter, and a membrane module, wherein the raw water tank and The peristaltic pump A is connected, the peristaltic pump A is connected to the filter, the filter is connected to the membrane module, and the membrane module is connected to the raw water tank.

The cold cycle system includes a cold water tank, a peristaltic pump B, a membrane module, and a refrigeration device, wherein the cold water tank is connected to the peristaltic pump B, the peristaltic pump B is connected to the membrane module, the membrane module is connected to the refrigeration device, and the refrigeration device is connected to the cold water tank.

A flowmeter A and a thermometer C are installed in the filter and the membrane module.

The membrane module is then connected to the raw water tank, and a thermometer B is set in the connection.

A flowmeter B and a thermometer A are installed between the peristaltic pump B and the membrane module.

Install a thermometer D between the membrane module and the refrigeration unit.

A treatment method for a high-salt-content low-level wastewater treatment system, comprising the following steps:

S1: The production water is pumped to the membrane module through the peristaltic pump B in the cold water tank;

S2: The production water enters the refrigeration device after passing through the membrane module;

S3: The production water enters the cold water tank after passing through the refrigeration device;

S4: After the low-level waste water is heated in the raw water tank, it enters the filter through the peristaltic pump A;

S5: Low-level waste water enters the membrane module after passing through the filter;

S6: After the low-level waste water passes through the membrane module, it enters the raw water tank, and the thermometer B measures the temperature.

In the S1, the flow meter B and the thermometer A measure the flow and temperature respectively.

In said S2, the thermometer D measures the temperature.

In S5, the flow meter A and the thermometer C measure the flow and temperature respectively.

The remarkable effect of the present invention is that: the tubular membrane module adopted in the present invention adopts the air-gap membrane distillation method to design the process flow, which can realize the standard treatment of high-salinity and low-release wastewater, and has the advantages of simple process, low cost and high efficiency. advanced features

Description of drawings

Fig. 1 is the schematic diagram of the high salinity low radioactive wastewater treatment system of the present invention

In the figure: 1 raw water tank, 2 peristaltic pump A, 3 filter, 4 membrane module, 5 cold water tank, 6 refrigeration device, 7 flow meter A, 8 thermometer A, 9 thermometer B, 10 flow meter B, 11 thermometer C, 12 thermometer D, 13 peristaltic pump B

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

A high-salt-content low-radioactive wastewater treatment system: including a thermal cycle system and a cold cycle system, wherein the thermal cycle system includes a raw water tank 1, a peristaltic pump A2, a filter 3, and a membrane module 4, wherein the raw water tank 1 and the peristaltic pump A2 connection, the peristaltic pump A2 is connected to the filter 3, the filter 3 is connected to the membrane module 4, and a flow meter A7 and a thermometer C11 are installed in the filter 3 and the membrane module 4, and the membrane module 4 is connected to the raw water tank 1, and in Set the thermometer B9 in the connection.

The cold cycle system includes a cold water tank 5, a peristaltic pump B13, a membrane module 4, and a refrigeration device 6, wherein the cold water tank 5 is connected to the peristaltic pump B13, and the peristaltic pump B13 is connected to the membrane module 4, and a flow meter is installed between the peristaltic pump B13 and the membrane module 4 B10, thermometer A8, the membrane module 4 is connected to the refrigeration device 6, and a thermometer D12 is installed between the membrane module 4 and the refrigeration device 6, and the refrigeration device 6 is connected to the cold water tank 5.

The membrane module 4 is divided into cold and hot sides, thereby isolating the liquid in the hot circulation system and the cold circulation system.

A system method for treating high-salt low-level wastewater, comprising the following steps:

S1: The production water is pumped to the membrane module 4 through the peristaltic pump B13 in the cold water tank 5, and the flow meter B10 and the thermometer A8 measure the flow and temperature respectively;

S2: The production water enters the refrigeration device 6 after passing through the membrane module 4, and the temperature is measured by the thermometer D12;

S3: The production water enters the cold water tank 5 after passing through the refrigeration device 6;

S4: After the low-level wastewater is heated in the raw water tank 1, it enters the filter 3 through the peristaltic pump A2;

S5: The low-level waste water enters the membrane module 4 after passing through the filter 3, and the flow meter A7 and the thermometer C11 measure the flow and temperature respectively;

S6: The low-level waste water enters the raw water tank 1 after passing through the membrane module 4, and the temperature is measured by the thermometer B9.

Claims (9)

1. A high-salt-content low-radioactive wastewater treatment system is characterized in that: it comprises a heat circulation system and a cold circulation system, wherein the heat circulation system comprises a raw water tank (1), a peristaltic pump A (2), a filter (3) . Membrane module (4), wherein the raw water tank (1) is connected to the peristaltic pump A (2), the peristaltic pump A (2) is connected to the filter (3), the filter (3) is connected to the membrane module (4), and the membrane Component (4) is connected to the original water tank (1) again. The cold circulation system includes a cold water tank (5), a peristaltic pump B (13), a membrane module (4), and a refrigeration device (6), wherein the cold water tank (5) is connected to the peristaltic pump B (13), and the peristaltic pump B (13) is connected to The membrane module (4), the membrane module (4) is connected to the refrigeration device (6), and the refrigeration device (6) is connected to the cold water tank (5). 2. A high-salt-content low-radioactive wastewater treatment system according to claim 1, characterized in that: a flowmeter A (7) and a thermometer C are installed in the filter (3) and the membrane module (4) (11). 3. A high-salt-content and low-radiation wastewater treatment system according to claim 2, characterized in that: the membrane module (4) is connected to the raw water tank (1), and a thermometer B (9) is set in the connection . 4. A high-salt-content, low-radioactive wastewater treatment system according to claim 3, characterized in that: a flowmeter B (10) and a thermometer A are installed between the peristaltic pump B (13) and the membrane module (4) (8). 5. A high-salt-content low-emission wastewater treatment system according to claim 4, characterized in that: a thermometer D (12) is installed between the membrane module (4) and the refrigeration device (6). 6. A treatment method of a high-salt-content low-level wastewater treatment system as claimed in claim 5, characterized in that: comprising the following steps: S1: The production water is pumped to the membrane module (4) through the peristaltic pump B (13) in the cold water tank (5); S2: The production water enters the refrigeration device (6) after passing through the membrane module (4); S3: the production water enters the cold water tank (5) after passing through the refrigeration device (6); S4: After the low-level waste water is heated in the raw water tank (1), it enters the filter (3) through the peristaltic pump A (2); S5: the low-level waste water enters the membrane module (4) after passing through the filter (3); S6: After passing through the membrane module (4), the low-level waste water enters the raw water tank (1), and the thermometer B (9) measures the temperature. 7. The method for treating high-salt-content and low-radioactive wastewater according to claim 6, characterized in that: in the S1, the flow meter B (10) and the thermometer A (8) respectively measure the flow and temperature. 8. A method for treating high-salt-content and low-radioactive wastewater according to claim 6, characterized in that: in said S2, the thermometer D (12) measures the temperature. 9. A method for treating high-salt-content and low-radioactive wastewater according to claim 6, characterized in that: in said S5, the flow meter A (7) and the thermometer C (11) respectively measure the flow and temperature.