WO2018233547A1

WO2018233547A1 - Pure water preparation method and device

Info

Publication number: WO2018233547A1
Application number: PCT/CN2018/091275
Authority: WO
Inventors: 易汉平; 周思齐; 周虎
Original assignee: 易汉平; 周思齐
Priority date: 2017-06-18
Filing date: 2018-06-14
Publication date: 2018-12-27
Also published as: SG11201911987XA; CN107089695A

Abstract

A pure water preparation method. Phase change transfer purification of water is implemented by means of a steam pressure difference generated by an air pump (6). Gas on a raw water side is conveyed to a pure water side by means of the air pump (6), and raw water is changed from a liquid state into a gas state. On the pure water side, steam is changed from the gas state to the liquid state. Also disclosed are a pure water preparation method, a seawater desalination method, and a seawater desalination device.

Description

Pure water preparation method and device

Technical field

This invention relates to water treatment, and more particularly to the purification of water.

Background technique

Distillation is an effective method for water purification, mainly through the phase change to achieve water purification. However, atmospheric distillation has the problem of high energy consumption. Vacuum distillation can reduce the distillation temperature and save energy. However, it is still necessary to heat the raw water during vacuum distillation, and it also consumes a lot of energy.

Summary of the invention

It is an object of the present invention to provide a water purification process that can be used with low energy consumption. The working principle of the invention is to realize the phase change transfer purification of water by using a gas pump to manufacture a vapor pressure difference. The air pump can transport the raw water side gas to the pure water side, and maintain the raw water side air pressure lower than the pure water side air pressure. The steam is transferred from the raw water side to the pure water side under the action of the air pump, the steam pressure on the raw water side is low, and the vapor pressure on the pure water side is high. On the raw water side, the vapor pressure is lower than the saturated vapor pressure of the raw water, and the raw water changes from a liquid to a gaseous state; on the pure water side, the vapor pressure is greater than the saturated vapor pressure of the pure water, and the water vapor changes from a gaseous state to a liquid water. The change of raw water from a liquid to a gaseous state occurs under vacuum. The change of raw water from liquid to gas is an endothermic process. The raw water can be heated by external heating to accelerate the vaporization process, or it can be externally heated without heating to provide the energy required for vaporization. The change of water vapor from gaseous to liquid water is an exothermic process, which can be either natural cooling or forced cooling by raw water. This water purification method is a continuous working method.

A pure water preparation device mainly comprises a raw water inlet pipe, a raw water outlet pipe, a vacuum vaporization chamber, a steam liquefaction chamber, a raw water inlet pump, a gas pump, a pure water outlet pump, a raw water inlet valve, a raw water outlet valve, a steam pipeline valve, Pure water outlet valve, steam pipeline, pure water outlet pipe. The vacuum vaporization chamber is connected with a raw water inlet pipe, a raw water outlet pipe and a steam pipe. The raw water inlet pipe is provided with a raw water inlet valve and a raw water inlet water pump, the raw water outlet pipe is installed with a raw water outlet valve, the steam pipe is installed with a steam pipe valve, and the steam is installed. The pipeline is connected to the air pump and the steam liquefaction chamber at the same time. The steam liquefaction chamber is connected with a pure water outlet pipe, and the pure water outlet pipe is installed with a pure water outlet valve and a pure water outlet pump. The raw water is driven by the raw water inlet pump to enter the vacuum vaporization chamber through the raw water inlet valve through the raw water inlet pipe, and some of the raw water is vaporized in the vacuum vaporization chamber, and the remaining raw water flows out through the raw water outlet pipe and the raw water outlet valve. The water vapor vaporized in the vacuum vaporization chamber is pumped into the steam liquefaction chamber by the air pump through the steam pipeline, and the water vapor is liquefied into pure water in the steam liquefaction chamber, and the pure water is discharged from the pure water outlet pipe through the pure water outlet valve under the action of the pure water discharge pump. . The vacuum of the vacuum vaporization chamber is maintained by the gravity of the raw water, and the raw water level of the vacuum vaporization chamber is higher than the raw water inlet liquid surface by 9-10 meters. Further, the raw water can be heated by various means, and the higher the temperature of the raw water, the faster the vaporization speed. Further, the raw water can be accelerated by spraying in a vacuum vaporization chamber, and the raw water can also be accelerated by various ways of enlarging the liquid-gas interface. Further, the steam liquefaction chamber can be equipped with various condensing devices to accelerate the liquefaction of the steam. Further, the cooling water of the condensing device installed in the steam liquefaction chamber is the raw water entering the device.

DRAWINGS

The drawing is a schematic diagram of the pure water preparation device of the present invention, wherein 1 - raw water inlet pipe, 2 - raw water outlet pipe, 3 - vacuum vaporization chamber, 4 - steam liquefaction chamber, 5 - raw water feed pump, 6 - air pump, 7 - Pure water pump, 8 - raw water inlet valve, 9 - raw water outlet valve, 10 - steam pipeline valve, 11 - pure water outlet valve, 12 - steam pipeline, 13 - pure water outlet pipe.

Detailed ways

Embodiment 1

A seawater desalination device is mainly composed of a seawater inlet pipe, a seawater outlet pipe, a vacuum vaporization chamber, a steam liquefaction chamber, a seawater inlet pump, a gas pump, and a pure water outlet pump, wherein the vacuum vaporization chamber is connected with a seawater inlet pipe and a seawater outlet water. The pipeline, the steam pipeline, the seawater inlet pipeline are installed with a seawater inlet valve and a seawater inlet water pump, the seawater outlet pipeline is installed with a seawater outlet valve, the steam pipeline is installed with a steam pipeline valve, and the steam pipeline is simultaneously connected with the air pump, the steam liquefaction chamber, and the steam liquefaction chamber. The pure water outlet pipe is connected, and the pure water outlet pipe is installed with a pure water outlet valve and a pure water outlet pump. The vacuum vaporization chamber is higher than the sea surface by more than 9 meters, the vacuum of the vacuum vaporization chamber is maintained by the gravity of the seawater itself, and the steam liquefaction chamber is located at the sea surface. Next, the steam liquefaction chamber cooling device is sea water. A seawater desalination method, in which the seawater enters the vacuum vaporization chamber by the action of the water pump, the seawater is vaporized under vacuum, and the steam is transferred to the steam liquefaction chamber by the action of the air pump, and the steam is liquefied into pure water in the steam liquefaction chamber; the steam on the seawater side The pressure is lower than the vapor pressure on the pure water side. On the seawater side, the vapor pressure is lower than the saturated vapor pressure of seawater, and the seawater is changed from liquid water to water vapor; on the pure water side, the vapor pressure is greater than the saturated vapor pressure of pure water, and the water vapor becomes Liquid water. The concentration of seawater that is not vaporized rises and is discharged from the seawater outlet pipe. Further, the vacuum vaporization chamber is equipped with a heating device, and the heating device may be a solar heating device or a vapor compression liquefaction heat releasing device. Further, the vacuum vaporization chamber is equipped with a spray device, and the seawater is sprayed by the spray device to form small water droplets, which can accelerate the vaporization of the seawater.

Embodiment 2

A pure water preparation device mainly comprises a raw water inlet pipe, a raw water outlet pipe, a vacuum vaporization chamber, a steam liquefaction chamber, a raw water inlet water pump, a gas pump and a pure water outlet pump, wherein the vacuum vaporization chamber is connected with a raw water inlet pipe and raw water. The water outlet pipe and the steam pipe are provided with a raw water inlet valve and a raw water inlet water pump, a raw water outlet pipe is installed with a raw water outlet valve, a steam pipe is installed with a steam pipe valve, and the steam pipe is connected to the air pump, the steam liquefaction chamber, and the steam liquefaction. The chamber is connected with a pure water outlet pipe. The pure water outlet pipe is equipped with a pure water outlet valve and a pure water outlet pump. The vacuum vaporization chamber is higher than the original water surface by more than 9 meters, and the vacuum of the vacuum vaporization chamber is maintained by the gravity of the raw water itself, and the steam liquefaction chamber is maintained. Located under the original water surface, the steam liquefaction chamber cooling device is raw water. A pure water preparation method, the raw water enters the vacuum vaporization chamber in the action of the feed water pump, the raw water is vaporized under vacuum, the steam is transferred to the steam liquefaction chamber under the action of the air pump, and the steam is liquefied into pure water in the steam liquefaction chamber; the raw water side The vapor pressure is lower than the vapor pressure on the pure water side. On the raw water side, the vapor pressure is lower than the saturated vapor pressure of the raw water, and the raw water is changed from the liquid water to the water vapor; on the pure water side, the vapor pressure is greater than the saturated vapor pressure of the pure water, and the water vapor becomes Into liquid water. The raw water that is not vaporized is discharged from the raw water outlet pipe. Further, the vacuum vaporization chamber is equipped with a heating device, and the heating device may be a solar heating device or a vapor compression liquefaction heat releasing device. Further, the vacuum vaporization chamber is equipped with a spray device, and the raw water is sprayed by the spray device to form small water droplets, which can accelerate the vaporization of the raw water.

Claims

A pure water preparation method mainly purifies water by a liquid-vapor-liquid phase change. On the raw water side, the vapor pressure is lower than the saturated vapor pressure of the raw water, and the raw water is changed from liquid water to water vapor, on the pure water side. The vapor pressure is greater than the saturated vapor pressure of pure water, and the water vapor becomes liquid water, which is characterized in that: 1) the steam on the raw water side is transferred from the raw water side to the pure water side by the air pump; 2) the gas pressure on the raw water side is lower than pure The gas pressure on the water side; 3) the conversion of raw water from liquid water to water vapor occurs under vacuum; 4) The liquid-vapor-liquid phase change prepared by pure water is continuously performed.
A process for producing pure water according to claim 1, wherein the vacuum in which the raw water is changed from liquid water to water vapor in a vacuum state is maintained by the gravity of the water itself.
A pure water preparation device for realizing the method for preparing pure water according to claim 1, which is mainly composed of a raw water inlet pipe, a raw water outlet pipe, a vacuum vaporization chamber, a steam liquefaction chamber, a raw water feed water pump, a gas pump, and a pure water discharge pump, and is characterized in that The vacuum vaporization chamber is connected with a raw water inlet pipe, a raw water outlet pipe and a steam pipe. The raw water inlet pipe is provided with a raw water inlet valve and a raw water inlet water pump, the raw water outlet pipe is installed with a raw water outlet valve, the steam pipe is installed with a steam pipe valve, and the steam is installed. The pipeline is connected to the air pump and the steam liquefaction chamber at the same time. The steam liquefaction chamber is connected with a pure water outlet pipe. The pure water outlet pipe is installed with a pure water outlet valve and a pure water outlet pump; the raw water enters the vacuum vaporization chamber in the action of the feed water pump, and the raw water is in a vacuum state. Under the vaporization, the steam is transferred to the steam liquefaction chamber by the action of the air pump, and the steam is liquefied into pure water in the steam liquefaction chamber; the raw water without vaporization is discharged from the raw water outlet pipe.
The pure water preparation apparatus according to claim 3, wherein the vacuum of the vacuum vaporization chamber is maintained by gravity of the raw water, and the vacuum vaporization chamber is higher than the liquid level of the raw water by more than 9 meters.
A pure water preparation apparatus according to claim 3, wherein the vacuum vaporization chamber has a heating means, and the raw water can be heated to accelerate vaporization by heating.
A pure water preparation apparatus according to claim 3, wherein the vacuum vaporization chamber has a spray device, and the raw water can be accelerated by a spray to vaporize.
A pure water preparation apparatus according to claim 3, wherein the vapor liquefaction chamber has a forced cooling means, and the water vapor can be accelerated by the forced cooling means.
A pure water preparation apparatus according to claim 7, wherein the cooling water of the steam liquefaction chamber forced cooling means is raw water entering the apparatus.
A seawater desalination method, characterized in that seawater enters a vacuum vaporization chamber by the action of a feed water pump, and the seawater is vaporized under vacuum, and the steam is transferred to the steam liquefaction chamber by the action of the air pump, and the steam is liquefied into pure water in the steam liquefaction chamber; The vapor pressure on the side is lower than the vapor pressure on the pure water side. On the seawater side, the vapor pressure is lower than the saturated vapor pressure of seawater, and the seawater changes from liquid water to water vapor; on the pure water side, the vapor pressure is greater than the saturated vapor pressure of pure water, water The vapor turns into liquid water; the vacuum in the vacuum vaporization chamber is maintained by the gravity of the seawater itself, which cools against the seawater.
The invention relates to a seawater desalination device, which mainly comprises a raw water seawater inlet pipe, a seawater outlet pipe, a vacuum vaporization chamber, a steam liquefaction chamber, a seawater inlet water pump, a gas pump and a pure water outlet pump, wherein the vacuum vaporization chamber is connected with a seawater inlet pipe and seawater. The water outlet pipe, the steam pipe, the seawater inlet pipe are installed with a seawater inlet valve and a seawater inlet water pump, the seawater outlet pipe is installed with a seawater outlet valve, the steam pipe is installed with a steam pipe valve, the steam pipe is simultaneously connected with the steam liquefaction chamber, and the steam liquefaction chamber is connected There is a pure water outlet pipe, and the pure water outlet pipe is installed with a pure water outlet valve and a pure water outlet pump, which is characterized in that the vacuum vaporization chamber is higher than the sea surface by more than 9 meters, and the steam liquefaction chamber is located below the sea surface.