CN215102091U

CN215102091U - Evaporation and separation system for high-salinity wastewater

Info

Publication number: CN215102091U
Application number: CN202120710422.3U
Authority: CN
Inventors: 周林; 吴晓兵
Original assignee: Alashanmeng Zhonghuan Wandai Environment Industry Co ltd
Current assignee: Alashanmeng Zhonghuan Wandai Environment Industry Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-12-10
Anticipated expiration: 2031-04-07

Abstract

The utility model discloses an evaporation piece-rate system of high salt waste water, it includes waste water pipeline, circulating water pond, 1 at least lift pump, a plurality of evaporation units of group and controller. The utility model has the advantages that: the utility model has simple connection structure and easy realization, ensures the evaporation and concentration effect of the waste water, ensures the concentration of the concentrated waste water to be stable, avoids the problem of sudden crystallization and system blockage, and further avoids the volatile substances from diffusing to pollute the environment; the scaling and corrosion of heat exchange equipment in the evaporation process are slowed down, and the service life of the equipment is prolonged; the utility model discloses an automated control, the effectual accurate control that improves the technology process, the personnel's work load that significantly reduces, convenient operation, safety and stability are high.

Description

Evaporation and separation system for high-salinity wastewater

The technical field is as follows:

the utility model relates to an evaporation piece-rate system, in particular to evaporation piece-rate system of high salt waste water.

Background art:

the industrial discharged high-salt wastewater can directly cause river water quality pollution and harm ecological environment and human health, and meanwhile, for industry, the high-salt wastewater can corrode industrial equipment and shorten the service life of the equipment.

At present, high-salinity wastewater discharged by industry is generally treated by adopting an evaporative crystallization mode, wherein the evaporative crystallization is a process that solid matters are precipitated from steam and solution in a crystal state, is a basic operation unit in a chemical process, and is also one of important means for separating and purifying the matters.

In the existing evaporative crystallization technology or equipment, the following problems exist: 1. the temperature in the evaporator and the flow and pressure of the waste water entering the evaporator are changed greatly, so that the evaporation and concentration effect is not ideal, the problem of overhigh concentration of the evaporated waste water is caused, and the situations of sudden crystallization, system blockage and environmental pollution caused by the diffusion of volatile substances are caused; 2. the heating mode of the existing evaporator generally adopts steam heating or electric heating, high-salinity wastewater needs to be heated by a heat exchanger, and the wastewater usually contains a large amount of calcium-magnesium metal plasma, so that scaling on the inner wall of the heat exchanger is easy to occur, and equipment is corroded.

The utility model has the following contents:

an object of the utility model is to provide a connection structure is simple, improve equipment life, and has realized automated control's evaporation piece-rate system of high salt waste water.

The utility model discloses by following technical scheme implement: the patent aims at providing an evaporation separation system of high-salinity wastewater, which comprises a wastewater pipeline, a circulating water tank, at least 1 lifting water pump, a plurality of groups of evaporation units and a controller,

the water outlet of the waste water pipeline is communicated with the water inlet of the circulating water pool; the water outlet of the circulating water tank is communicated with the water inlet of each lifting water pump; the water outlet of each lifting water pump is communicated with the water inlet of the water outlet main pipe;

the evaporator set comprises an evaporator and a hot air blower; the air inlet of the evaporator is communicated with the air outlet of the air heater; a water inlet pipe is communicated with the water inlet of the evaporator;

the water inlet of the water inlet pipe is communicated with the water outlet of the main water outlet pipe; the water outlet of the evaporator is communicated with the water inlet of the water return main pipe; the water outlet of the water return main pipe is communicated with the water inlet of the circulating water tank;

a pressure sensor is arranged on the water outlet main pipe; each water inlet pipe is provided with an adjusting valve and a flow sensor; a temperature sensor is arranged on a pipeline between the air heater and the evaporator; the signal output ends of the pressure sensor, each flow sensor and the temperature sensor are connected with the signal input end of the controller through signals; and the signal output end of the controller is respectively in signal connection with the signal input ends of the lifting water pump, the air heater and the regulating valve.

Further, the device also comprises a temporary wastewater storage tank, wherein a main water inlet pipe is communicated with a water inlet of the temporary wastewater storage tank; the water outlet of each evaporator is communicated with the water inlet of the water inlet main pipe;

a density sensor and a liquid level sensor are arranged in the circulating water tank, a shutoff valve is arranged on the wastewater pipeline, a return water valve is arranged on the return water main pipe, and a water passing valve is arranged on the water inlet main pipe;

the signal output ends of the density sensor and the liquid level sensor are in signal connection with the signal input end of the controller; and the signal output end of the controller is respectively in signal connection with the signal input ends of the shutoff valve, the water return valve and the water passing valve.

Further, the air outlet of the evaporator is communicated with the air inlet of the demister; and the liquid outlet of the demister is communicated with the water inlet of the evaporator.

The utility model has the advantages that: 1. the utility model has simple connection structure and easy realization; the pressure, the flow and the hot air temperature of the air heater are detected through a pressure sensor, a flow sensor and a temperature sensor, signals are transmitted to a controller, and then a lifting water pump, a regulating valve and the air heater are controlled and regulated, so that the heating temperature in an evaporator, the flow and the pressure of waste water entering the evaporator are constant, the evaporation and concentration effects of the waste water are ensured, the concentration of the concentrated waste water is stable, the problem that a system is blocked by sudden crystallization is avoided, and further the environment pollution caused by the diffusion of volatile substances is avoided; 2. the hot air is adopted to heat the wastewater for evaporation, and a heat exchanger is not needed, so that the problem that heat exchange equipment is difficult to adapt to high concentration in the evaporation crystallization process of high-salt water in the prior art can be effectively solved, the scaling and corrosion of the heat exchange equipment in the evaporation process are reduced, and the service life of the equipment is prolonged; 3. the utility model discloses an automated control, the effectual accurate control that improves the technology process, the personnel's work load that significantly reduces, convenient operation, safety and stability are high.

Description of the drawings:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a control schematic diagram of the present invention.

The system comprises a waste water pipeline 1, a circulating water tank 2, a lifting water pump 3, an evaporation unit 4, an evaporator 41, a hot air blower 42, a water inlet pipe 43, a regulating valve 44, a flow sensor 45, a controller 5, a temporary waste water storage tank 6, a main water outlet pipe 7, a main water return pipe 8, a pressure sensor 9, a temperature sensor 10, a main water inlet pipe 11, a density sensor 12, a liquid level sensor 13, a shut-off valve 14, a water return valve 15, a water passing valve 16 and a demister 17.

The specific implementation mode is as follows:

as shown in fig. 1-2, an evaporation separation system for high-salinity wastewater comprises a wastewater pipeline 1, a circulating

water tank

2, 2

lift pumps

3, 3 groups of evaporation units 4, a controller 5 and a temporary wastewater storage tank 6, wherein a water outlet of the wastewater pipeline 1 is communicated with a water inlet of the circulating water tank 2; the water outlet of the circulating water tank 2 is communicated with the water inlet of each lifting water pump 3; the water outlet of each lifting water pump 3 is communicated with the water inlet of the main water outlet pipe 7; the evaporator set 4 comprises an evaporator 41 and a hot air blower 42; the air inlet of the evaporator 41 is communicated with the air outlet of the air heater 42, hot air is adopted to heat the wastewater for evaporation, and a heat exchanger is not needed, so that the problem that heat exchange equipment is difficult to adapt to high concentration in the evaporation crystallization process of high-salt water in the prior art can be effectively solved, the scaling and corrosion of the heat exchange equipment in the evaporation process are reduced, and the service life of the equipment is prolonged; a water inlet pipe 43 is communicated with the water inlet of the evaporator 41; the water inlet of the water inlet pipe 43 is communicated with the water outlet of the main water outlet pipe 7; the water outlet of the evaporator 41 is communicated with the water inlet of the water return main pipe 8; the water outlet of the water return main pipe 8 is communicated with the water inlet of the circulating water tank 2; a pressure sensor 9 is arranged on the main water outlet pipe 7; each water inlet pipe 43 is provided with a regulating valve 44 and a flow sensor 45; a temperature sensor 10 is provided in the duct between the hot air blower 42 and the evaporator 41.

A main water inlet pipe 11 is communicated with the water inlet of the temporary wastewater storage tank 6; the water outlet of each evaporator 41 is communicated with the water inlet of the main water inlet pipe 11; a density sensor 12 and a liquid level sensor 13 are arranged in the circulating water tank 2, a shutoff valve 14 is arranged on the waste water pipeline 1, a return water valve 15 is arranged on the return water main pipe 8, and a water passing valve 16 is arranged on the water inlet main pipe 11.

The air outlet of the evaporator 41 is communicated with the air inlet of the demister 17; the liquid outlet of the demister 17 is communicated with the water inlet of the evaporator 41.

The signal output ends of the pressure sensor 9, each flow sensor 45, the temperature sensor 10, the density sensor 12 and the liquid level sensor 13 are connected with the signal input end of the controller 5 through signals; the signal output ends of the controller 5 are respectively connected with the signal input ends of the lifting water pump 3, the hot air blower 42, the regulating valve 44, the shutoff valve 14, the water return valve 15 and the water passing valve 16 through signals.

The working process is as follows: the wastewater pipeline 1 conveys wastewater into the circulating water tank 2, the lifting water pump 3 conveys the wastewater into the evaporator 41 respectively, hot air is conveyed into the evaporator 41 through the hot air blower 42 to carry out evaporation concentration on the wastewater, evaporated steam is discharged into the demister 17 from a gas outlet of the evaporator 41, liquid drops in the steam are intercepted by the demister 17, the rest of gas is discharged outside, and the intercepted liquid is conveyed back into the evaporator 41; the waste water evaporated by the evaporator 41 returns to the circulating water tank 2 again for re-evaporation, the process is continuously circulated, the density of the waste water in the circulating water tank 2 is gradually increased, the density sensor 12 in the circulating water tank 2 detects the density of the waste water constantly and transmits a signal to the controller 5, when the detected density value reaches a set value, the controller 5 controls the water return valve 15 to be closed, the water passing valve 16 is opened, and the concentrated waste water is discharged to the temporary waste water storage tank 6 for temporary storage for the treatment of the next process; the liquid level sensor 13 in the circulating water tank 2 detects the change of the liquid level in the circulating water tank 2 at any time and transmits a signal to the controller 5, when the liquid level is reduced to a set lower limit value, the controller 5 controls the shut-off valve 14 to be opened, the water return valve 15 to be opened and the water passing valve 16 to be closed to supplement the waste water in the circulating water tank 2, and when the liquid level is increased to a set upper limit value, the controller 5 controls the shut-off valve 14 to be closed to stop supplementing the waste water in the circulating water tank 2.

The pressure sensor 9 detects the pressure of the wastewater in the main water outlet pipe 7 at any time, and transmits a signal to the controller 5, when the detected pressure value is lower than a set lower limit value, the controller 5 controls the lifting water pumps 3 to be opened to be large, if the detected pressure value is still unable to reach the set lower limit value when the lifting water pumps are opened to the maximum, the controller 5 controls the second lifting water pump 3 to be started and opened to be large until the detected pressure value reaches a set value range, when the detected pressure value exceeds a set value upper limit, the lifting water pumps 3 are controlled to be opened to be small, and if the detected pressure value when the lifting water pumps are both opened still exceeds the set value upper limit, the controller 5 controls one lifting water pump 3 to be closed until the detected pressure value reaches the set value range, so that the working pressure of the main water outlet pipe 7 is stable all the time, and the purpose of constant-pressure water supply is achieved; the flow sensor 45 on the water inlet pipe 43 of each evaporator 41 detects the flow of the wastewater entering the evaporator 41 at any time and transmits a signal to the controller 5, when the detected flow value is lower than a set lower limit value, the controller 5 controls the regulating valve 44 to be opened, and when the detected flow value is higher than a set upper limit value, the controller 5 controls the regulating valve 44 to be opened, the opening degree of the regulating valve 44 is changed, so that the water inlet amount entering the evaporator 41 is regulated, and the wastewater enters the evaporator 41 at a constant flow; the temperature sensor 10 detects the temperature of hot air entering the evaporator 41 from the hot air blower 42 at any time, and transmits a signal to the controller 5, when the detected temperature value is lower than a set lower limit value, the controller 5 controls the hot air blower 42 to be turned on, and when the detected temperature value is higher than a set upper limit value, the controller 5 controls the hot air blower 42 to be turned on, so that the hot air blower 42 is ensured to effectively output hot air with constant temperature; heating temperature in the evaporimeter 41 and the waste water flow and the pressure that get into in the evaporimeter 41 are invariable through above-mentioned control, have guaranteed the evaporative concentration effect of waste water, guarantee simultaneously that the concentration after the waste water is concentrated is stable, avoids appearing the problem emergence that crystallization blocks up the system suddenly, and then avoids the volatile class material to spread out the polluted environment.

The utility model discloses connection structure is simple, easily realizes, and has realized automated control, the effectual accurate control that improves the process, the personnel's work load that significantly reduces, convenient operation, and safety and stability is high.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An evaporation separation system for high-salinity wastewater is characterized by comprising a wastewater pipeline, a circulating water tank, at least 1 lifting water pump, a plurality of groups of evaporation units and a controller,

2. The high-salinity wastewater evaporation and separation system according to claim 1, further comprising a wastewater temporary storage tank, wherein a water inlet main pipe is arranged on a water inlet of the wastewater temporary storage tank in a communication manner; the water outlet of each evaporator is communicated with the water inlet of the water inlet main pipe;

3. The evaporative separation system for high-salinity wastewater according to claim 1 or 2, wherein the air outlet of the evaporator is communicated with the air inlet of the demister; and the liquid outlet of the demister is communicated with the water inlet of the evaporator.