CN106587469B - Sewage treatment method and equipment - Google Patents
Sewage treatment method and equipment Download PDFInfo
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- CN106587469B CN106587469B CN201610567231.XA CN201610567231A CN106587469B CN 106587469 B CN106587469 B CN 106587469B CN 201610567231 A CN201610567231 A CN 201610567231A CN 106587469 B CN106587469 B CN 106587469B
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- 239000010865 sewage Substances 0.000 title claims abstract description 133
- 238000011282 treatment Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000002425 crystallisation Methods 0.000 claims abstract description 52
- 230000008025 crystallization Effects 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000000889 atomisation Methods 0.000 claims abstract description 37
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000002351 wastewater Substances 0.000 claims description 30
- 238000001704 evaporation Methods 0.000 claims description 18
- 230000008020 evaporation Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 10
- 239000003595 mist Substances 0.000 claims description 10
- 238000004065 wastewater treatment Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 2
- 239000012530 fluid Substances 0.000 abstract description 12
- 239000002245 particle Substances 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 150000003839 salts Chemical class 0.000 description 13
- 230000008569 process Effects 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003672 processing method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a sewage treatment method and equipment, wherein the method comprises the following steps: carrying out atomization treatment on the sewage; injecting the atomized sewage into a heater in a high-pressure environment, and heating to a preset temperature to form sewage in a vapor-liquid coexisting state; inputting the sewage in the vapor-liquid coexisting form into a crystallization evaporator, and separating out saturated pollution components in the crystallization evaporator; and condensing the water vapor in the crystallization evaporator to obtain water without the pollution component, and completing the separation of the pollution component and the water. The method is that the sewage is heated after being atomized, the atomized fluid is fine liquid particles, and the contact area of the liquid particles with the outside or a heat source is larger than that of flowing liquid when the liquid particles are heated, so that the atomized liquid particles are beneficial to heating, the heating time and the energy required by heating can be shortened, the heat source can be effectively utilized, and the energy required by heating can be saved.
Description
The present application claims priority from the chinese patent application filed on 14/10/2015 under the name of "a wastewater treatment method and apparatus" by the chinese patent office under application number 201510661224.1, the entire contents of which are incorporated herein by reference.
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment method and equipment.
Background
Industrial sewage and industrial wastewater are produced in large quantities in industrial production, and direct discharge of the industrial sewage and the industrial wastewater causes serious environmental pollution problems and even directly causes pollution of drinking water, thereby causing serious damage to human life.
At present, sewage treatment can be carried out in various modes, the common method is to adopt an evaporation technology to remove sewage and wastewater containing salt, the method is to heat the sewage and the wastewater to partially evaporate the sewage and the wastewater into water vapor, the salt content in the sewage and the wastewater is increased due to the evaporation of the water vapor, and when the saturation degree is reached, salt can be separated out from the sewage and the wastewater, so that the salt and the water are separated.
Specifically, referring to fig. 1, fig. 1 is a flow chart of a method for treating sewage by using evaporation technology in the prior art, wherein in the first step, the sewage is preheated in a preheater, and certain parameters are provided for the subsequent processes; secondly, injecting the fluid in the preheater into a heater, wherein the fluid can be heated to a necessary temperature by the heater, and the fluid in the heater is in a high-pressure state, so that the phase change of the fluid in the heater can not happen generally; and thirdly, injecting the fluid passing through the heater into the evaporation chamber, wherein the pressure of the fluid is rapidly reduced after the fluid enters the evaporation chamber to cause flash evaporation or rapid boiling of part of the liquid, the unevaporated liquid and salt are temporarily stored in the evaporation chamber, the wastewater is continuously evaporated, the concentration of salt in the wastewater is higher and higher, and when the salt in the wastewater is in a supersaturation state, the salt in the water is continuously separated out and enters the lower part of the evaporation chamber to be discharged.
However, in the above-mentioned sewage treatment method in the prior art, a large amount of heat energy needs to be consumed when the heater heats the sewage, and the water vapor may also be condensed, which also causes a problem of low heat source utilization rate, so that the method in the prior art will cause energy waste, and cannot effectively save energy.
Disclosure of Invention
The invention provides a sewage treatment method to solve the problems in the prior art.
The invention further provides sewage treatment equipment.
The invention provides a sewage treatment method, which comprises the following steps:
carrying out atomization treatment on the sewage;
injecting the atomized sewage into a heater in a high-pressure environment, and heating to a preset temperature to form sewage in a vapor-liquid coexisting state;
inputting the sewage in the vapor-liquid coexisting form into a crystallization evaporator, and separating out saturated pollution components in the crystallization evaporator;
and condensing the water vapor in the crystallization evaporator to obtain water without the pollution component, and completing the separation of the pollution component and the water.
Optionally, before the step of condensing the water vapor in the crystallization evaporator to obtain water without the contaminant component, the following steps are performed:
compressing the water vapor output from the crystallization evaporator by a first compressor;
inputting the compressed water vapor into the heater.
Optionally, the sewage is atomized by the following method:
water molecules of the sewage are scattered by ultrasonic waves to form the sewage into a mist shape.
Optionally, the sewage is atomized by the following method:
sewage is made to pass through the vortex fan rotating at high speed, and the high-speed rotation of the vortex fan breaks up the sewage into a mist form.
Optionally, the sewage is atomized by the following method:
introducing high-speed airflow into the sewage;
the high-speed airflow impacts the sewage and drives the sewage to spray to form a fog shape.
Optionally, the high-speed airflow introduced into the high-speed airflow in the sewage is obtained by the following method:
compressing the low-pressure air into high-pressure air by using a second compressor;
and (3) forming high-speed airflow by passing the high-pressure gas through a fine nozzle.
Optionally, the first compressor and the second compressor complete compression treatment by using a conchoidal technique.
Optionally, in the step of injecting the atomized sewage into a heater in a high-pressure environment and heating to a predetermined temperature, the heater heats the sewage in the following manner:
disposing a heat source in a center of the heater;
and a central heat source is adopted to heat the sewage extending outwards from the center.
Optionally, in the step of injecting the atomized sewage into a heater in a high-pressure environment and heating to a predetermined temperature, the heater heats the sewage in the following manner:
disposing a heat source on an inner wall of the heater;
the sewage is heated by a heat source from the outside to the center.
Optionally, in the step of injecting the atomized sewage into a heater in a high-pressure environment and heating to a predetermined temperature, the heater heats the sewage in the following manner:
high-temperature saturated steam is injected into the heater to heat the sewage.
The present invention also provides a sewage treatment apparatus comprising: the device comprises an atomization treatment device, a heater and a crystallization evaporator, wherein the atomization treatment device atomizes sewage, the atomized sewage is injected into the heater and heated to a preset temperature to form a vapor-liquid coexisting state for output, and the vapor-liquid coexisting state sewage is injected into the crystallization evaporator for crystallization evaporation treatment;
in the crystallization evaporator, saturated pollution components are separated out, water which does not contain the pollution components is obtained by condensing water vapor in the crystallization evaporator, and separation of the pollution components and the water is completed.
Optionally, the system further comprises a first compressor, wherein the first compressor compresses the water vapor discharged from the crystallization evaporator, and injects the compressed water vapor into the heater.
Optionally, the atomization treatment device comprises a second compressor, a high-speed airflow channel and a sewage injection channel, the high-speed airflow channel and the sewage injection channel are provided with an intersection point, the second compressor compresses air into high-speed airflow, and the high-speed airflow impacts sewage flowing into the intersection point to form a fog-like form.
Optionally, the first compressor and the second compressor have a crank-slider mechanism.
Compared with the prior art, the invention has the following advantages:
the invention provides a sewage treatment method, which comprises the following steps: carrying out atomization treatment on the sewage; injecting the atomized sewage into a heater in a high-pressure environment, and heating to a preset temperature to form sewage in a vapor-liquid coexisting state; inputting the sewage in the vapor-liquid coexisting form into a crystallization evaporator, and separating out saturated pollution components in the crystallization evaporator; and condensing the water vapor in the crystallization evaporator to obtain water without the pollution component, and completing the separation of the pollution component and the water. The method is that the sewage is heated after being atomized, the atomized fluid is fine liquid particles, and the contact area of the liquid particles with the outside or a heat source is larger than that of flowing liquid when the liquid particles are heated, so that the atomized liquid particles are beneficial to heating, the heating time and the energy required by heating can be shortened, the heat source can be effectively utilized, and the energy required by heating can be saved.
Drawings
FIG. 1 is a flow chart of a method for treating wastewater by evaporation in the prior art.
FIG. 2 is a flow chart of a wastewater treatment method according to an embodiment of the present invention.
Fig. 3 is a flowchart of an atomization processing method according to an embodiment of the present invention.
Fig. 4 is a flowchart of a method for performing an atomization process after a secondary vapor compression process according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a liquid treatment apparatus according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention provide a method for treating wastewater, which is generally to remove pollutants or components in wastewater, wherein the pollutants or components are generally salts or the like that can be dissolved in water and can be separated out from wastewater under saturated conditions, and the pollutants or components can be removed by evaporation, so the method is a method for removing pollutants or components in wastewater by using evaporation technology.
Fig. 2 is a flow chart of a sewage treatment method according to an embodiment of the present invention, and referring to fig. 2, the liquid treatment method includes:
step S201, carrying out atomization treatment on the sewage.
And carrying out atomization treatment on the sewage, wherein the atomized sewage is formed through the atomization treatment. The atomization treatment is to make the liquid into small drops through a special device and spray the small drops in a mist form.
The atomization treatment method can be various, and the liquid to be treated can be dispersed into atomized liquid particles.
The atomization of the sewage in the atomization treatment is realized by adopting the following modes:
first, sewage is passed through a vortex fan rotating at a high speed, and the high-speed rotation of the vortex fan breaks up the sewage into a mist form.
In this case, the sewage, which is generally passed through the vortex fan, has a certain flow velocity to ensure that the sewage can be sprayed to the outside after passing through the vortex fan. In vortex fan's the outside, on sewage spun direction promptly, set up a plurality of grids that have certain density and certain size, this grid can carry out further collision with the atomizing liquid drop of spun for the vaporific water droplet that adopts this atomizing mode to produce is more even, and atomization efficiency and effect are better.
The density and the number of the grids can be set according to actual requirements, and the larger the density of the grids is, the smaller the area size formed by the grids is, the finer the formed atomized liquid particles are, and the better the atomization treatment effect is.
Secondly, the water molecules of the sewage are scattered by ultrasonic waves to form the sewage into a mist form.
The ultrasonic wave has a certain vibration frequency, and water molecules are scattered through the vibration of the ultrasonic wave, so that the sewage is changed into a mist form from a flowing form.
In addition, third, the embodiment of the present invention provides the simplest and most direct atomization. Referring to fig. 3, fig. 3 is a flowchart of an atomization processing method according to an embodiment of the present invention, where the atomization processing method includes:
and step S201-1, introducing high-speed airflow into the sewage.
The atomization method is actually implemented by compressing atomization, and the high-speed gas flow is formed by compressing low-pressure air into high-pressure gas through a second compressor and then ejecting the high-pressure gas through a fine nozzle to form high-speed gas flow.
The high-speed airflow generated by the second compressor provides initial kinetic energy for collision with water molecules of the sewage, and the water molecules can be scattered to form water mist only with certain kinetic energy, specifically, the kinetic energy of the high-speed airflow collides with the water molecules, so that molecular bonds between the water molecules are destroyed, and finally the water mist is formed.
In order to correspond to the device included in the sewage treatment equipment in the following of the embodiment of the invention, the compressor provided therein is referred to as a second compressor, and the second compressor adopts the conchoid technology to realize the compression treatment process.
Step S201-2, the high-speed airflow impacts the sewage and drives the sewage to be sprayed to form a fog shape.
The step is that the high-speed airflow has a certain transmission channel, the sewage transmission also has a certain channel, and the two channels have an intersection point, the transmission channel of the high-speed airflow still sprays air according to the original direction after passing through the intersection point, the transmission channel of the sewage can be intersected with the transmission channel of the high-speed airflow from any direction, the sewage passing through the intersection point is not transmitted according to the original channel, but is driven by the high-speed airflow to spray along the transmission channel of the high-speed airflow rapidly, and the sprayed sewage is in a foggy form.
In any case, the liquid flowing in this step may be formed into atomized liquid particles. In this step, the formed atomized sewage needs to be heated in the subsequent step, and the liquid in the atomized form is composed of a plurality of fine water droplets, so that the contact area between the atomized liquid and the air or the external heat source is large, and therefore, in the heating process, the contact area between the atomized liquid and the heat source or the air is large, the heating speed and the heating efficiency are improved, and the energy of the heat source required in the heating process can be saved.
In addition, the atomized liquid is heated, so that energy sources can be saved, the heating time can be shortened on the premise of heating to a certain temperature, and another beneficial effect is generated for the sewage treatment process.
Step S202, injecting the atomized sewage into a heater in a high-pressure environment, and heating to a preset temperature to form sewage in a vapor-liquid coexisting state.
In this step, the atomized sewage is heated without a morphological phase change, and the high pressure environment of the heater causes the boiling point of water to be increased, and the sewage is heated to a predetermined temperature in the heater, thereby forming a vapor-liquid coexisting form of sewage. Specifically, in the heating process, since the boiling point of water is increased and the predetermined temperature does not reach the boiling point of water under the corresponding pressure, the contaminated water is not completely evaporated into water vapor but exists in the heater in a state where both gas and liquid coexist.
The gas-liquid coexisting form corresponds to a solid, and comprises a gas form and a liquid form, and the gas and the liquid are also converted with each other.
The heating mode in the heater can be various, and can be divided into heating by adopting an electric heating wire, radiation heating or steam heating according to the heating mode.
For example, the heating method may be heating by saturated steam, and specifically, the sewage is heated by injecting high-temperature saturated steam into the heater.
Further, the heat source positions may be classified into center heating and peripheral heating.
Specifically, in the first central heating mode, a heat source is arranged in the center of the heater; and a central heat source is adopted to heat the sewage extending outwards from the center.
In the second peripheral heating mode, a heat source is arranged on the inner wall of the heater; the sewage is heated by a heat source from the outside to the center.
Step S203, inputting the sewage in the vapor-liquid coexisting form into a crystallization evaporator, and precipitating saturated pollution components in the crystallization evaporator.
The sewage in the vapor-liquid coexisting form which passes through the heater is injected into the crystallization evaporator, the pressure of the sewage in the vapor-liquid coexisting form is rapidly reduced after the sewage enters the crystallization evaporator, so that part of the liquid is flashed or boiled rapidly, unevaporated liquid and salt are temporarily stored in the evaporation chamber, the wastewater is evaporated continuously, the concentration of the salt in the wastewater is higher and higher, and when the salt in the wastewater is in a supersaturation state, the salt in the water is separated out continuously and enters the lower part of the crystallization evaporator to be discharged.
The heating treatment and the crystallization evaporation treatment in steps S202 and S203 are generally conventional treatment methods, and the respective treatments are performed in a heater and a crystallization evaporator, respectively. However, the method provided by the embodiment of the invention treats atomized sewage in the heating treatment process instead of the traditional common flowing liquid sewage, so that the steps are introduced, the atomized liquid is heated more simply and energy is saved, and the heating treatment process can utilize heat energy more effectively compared with the traditional heating process, and has better heating effect and high heating efficiency.
And step S204, condensing the water vapor in the crystallization evaporator to obtain water without the pollution component, and completing the separation of the pollution component and the water.
In addition, when the evaporation technology is used to remove pollutants and components in the sewage, a secondary vapor recompression (MVR) process is generally used, i.e., the water vapor output from the crystallization evaporator is compressed by a first compressor; and inputting the water vapor subjected to the compression treatment into the heater.
In combination with the sewage treatment method provided by the embodiment of the invention, the sewage is firstly subjected to atomization treatment, so that a recompression treatment process can be added to the method implemented by the invention.
Specifically, referring to fig. 4, fig. 4 is a flowchart of a method for performing an atomization process after a secondary vapor compression process according to an embodiment of the present invention.
The method is executed before step S204, and specifically executed as follows:
in step S401, the water vapor output from the crystallization evaporator is compressed by a first compressor.
The liquid has been subjected to a crystallization evaporation process in the crystallization evaporator in the above step S203, and the water vapor generated by the crystallization evaporator is subjected to a compression process by a first compressor which compresses the water vapor outputted from the crystallization evaporator at a low temperature and a low pressure to form water vapor having a high temperature and a high pressure, which is subjected to a heating process in the next step S402.
Step S402, inputting the water vapor subjected to the compression treatment into the heater.
The step is that the water vapor compressed by the first compressor is used as a heat source to be injected into the heater for further heating, and then the water vapor continues to enter the crystallization evaporator and the first compressor for circulation treatment.
In addition, the water vapor compressed by the first compressor can be atomized, and liquid water droplets can exist in the water vapor, so that fluid in a more uniform atomized form can be formed after the atomization. Thus, the cycle is as follows: firstly, water vapor passing through a crystallization evaporator enters a first compressor to form high-pressure water vapor, the high-pressure water vapor is atomized and then enters the heating device for heating treatment, the heated fluid enters the crystallization evaporator again, the non-evaporated fluid can separate out saturated substances under the condition that the pollutants are saturated, the evaporated water vapor enters the first compressor again, and the treatment is carried out in a circulating mode.
The method for carrying out atomization treatment after the water vapor compression treatment of the crystallization evaporator can effectively utilize the residual heat energy, compress and reuse the water vapor, and can improve the utilization rate and the heating efficiency of a heat source by combining the compression treatment and the atomization treatment of the liquid vapor, so that the two modes are combined for use, so that the method has a more remarkable effect in a sewage treatment process; on the other hand, the heating time can be saved, and the efficiency of sewage treatment is improved.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a liquid treatment apparatus according to an embodiment of the present invention, the liquid treatment apparatus includes an atomization treatment device 501, a heater 502, and a crystallization evaporator 503, the atomization treatment device atomizes sewage, the atomized sewage is injected into the heater and heated to a predetermined temperature, a vapor-liquid coexisting state is formed, and the atomized sewage is injected into the crystallization evaporator to perform crystallization evaporation treatment.
In the crystallization evaporator, saturated pollution components are separated out, water which does not contain the pollution components is obtained by condensing water vapor in the crystallization evaporator, and separation of the pollution components and the water is completed.
Preferably, the system further comprises a first compressor, wherein the first compressor compresses the water vapor discharged from the crystallization evaporator and injects the compressed water vapor into the heater.
Preferably, the atomization treatment device comprises a second compressor, a high-speed airflow channel and a sewage injection channel, the high-speed airflow channel and the sewage injection channel are provided with an intersection point, the second compressor compresses air into high-speed airflow, and the high-speed airflow impacts sewage flowing into the intersection point to form a fog-like state.
Preferably, the first compressor and the second compressor have a crank-slider mechanism.
Since the liquid treatment apparatus described above has a correspondence with the method described above, reference is made to the description of the method described above for the case of the apparatus.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto, and variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (10)
1. A method of treating wastewater, comprising:
carrying out atomization treatment on sewage through a vortex fan rotating at a high speed, wherein the vortex fan breaks up the sewage into a fog shape through high-speed rotation, and a plurality of grids with certain density and size are arranged in the sewage spraying direction;
injecting the atomized sewage into a heater in a high-pressure environment, and heating to a preset temperature to form sewage in a vapor-liquid coexisting state, wherein a heat source is arranged in the center of the heater, and the sewage is heated by a central heat source in a manner that the sewage extends outwards from the center;
inputting the sewage in the vapor-liquid coexisting form into a crystallization evaporator, and separating out saturated pollution components in the crystallization evaporator;
condensing the water vapor in the crystallization evaporator to obtain water without the pollution component, and completing the separation of the pollution component and the water;
wherein before the step of condensing the water vapor in the crystallization evaporator to obtain water without the pollution component, the method further comprises the following steps:
compressing the water vapor output from the crystallization evaporator by a first compressor to obtain high-pressure water vapor, and atomizing the high-pressure water vapor; inputting the high-pressure steam subjected to the atomization treatment into the heater.
2. The wastewater treatment method according to claim 1, wherein the wastewater is atomized by the following method:
water molecules of the sewage are scattered by ultrasonic waves to form the sewage into a mist shape.
3. The wastewater treatment method according to claim 1, wherein the wastewater is atomized by the following method:
introducing high-speed airflow into the sewage;
the high-speed airflow impacts the sewage and drives the sewage to spray to form a fog shape.
4. The wastewater treatment method according to claim 3, wherein the high-speed airflow introduced into the wastewater is obtained by:
compressing the low-pressure air into high-pressure air by using a second compressor;
and (3) forming high-speed airflow by passing the high-pressure gas through a fine nozzle.
5. The wastewater treatment method according to claim 4, wherein the first compressor and the second compressor perform compression treatment by a conchoid technique.
6. The wastewater treatment method according to claim 1, wherein in the step of injecting the atomized wastewater into a heater in a high-pressure environment and heating the wastewater to a predetermined temperature, the heater heats the wastewater in the following manner:
disposing a heat source on an inner wall of the heater;
the sewage is heated by a heat source from the outside to the center.
7. The wastewater treatment method according to claim 1, wherein in the step of injecting the atomized wastewater into a heater in a high-pressure environment and heating the wastewater to a predetermined temperature, the heater heats the wastewater in the following manner:
high-temperature saturated steam is injected into the heater to heat the sewage.
8. An apparatus for treating wastewater, comprising: the sewage treatment system comprises an atomization treatment device, a heater and a crystallization evaporator, wherein the atomization treatment device atomizes sewage, a vortex fan is adopted by the atomization treatment device, a plurality of grids with certain density and size are arranged in the spraying direction of the sewage, the atomized sewage is injected into the heater and heated to a preset temperature to form a vapor-liquid coexisting state for output, the vapor-liquid coexisting state sewage is injected into the crystallization evaporator to carry out crystallization evaporation treatment, the heat source of the heater is arranged in the center of the heater, and the sewage is heated by a central heat source to extend outwards from the center;
in the crystallization evaporator, saturated pollution components are separated out, water vapor in the crystallization evaporator is condensed to obtain water which does not contain the pollution components, and the separation of the pollution components and the water is completed;
the sewage treatment equipment also comprises a first compressor, wherein the first compressor is used for compressing the water vapor discharged by the crystallization evaporator to obtain high-pressure water vapor and atomizing the high-pressure water vapor; injecting the high-pressure steam subjected to the atomization treatment into the heater.
9. The wastewater treatment apparatus of claim 8, wherein the atomization treatment device comprises a second compressor, a high-speed airflow channel and a wastewater injection channel, the high-speed airflow channel and the wastewater injection channel have an intersection, the second compressor compresses air into high-speed airflow, and the high-speed airflow impacts wastewater flowing into the intersection to form a mist shape.
10. The wastewater treatment apparatus of claim 9, wherein the first and second compressors have a crank-slider mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015106612241 | 2015-10-14 | ||
| CN201510661224 | 2015-10-14 |
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| Publication Number | Publication Date |
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| CN106587469A CN106587469A (en) | 2017-04-26 |
| CN106587469B true CN106587469B (en) | 2020-12-08 |
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| CN201610567231.XA Expired - Fee Related CN106587469B (en) | 2015-10-14 | 2016-07-19 | Sewage treatment method and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730779A (en) * | 2012-07-24 | 2012-10-17 | 天津城市建设学院 | Solar zero-liquid-discharge sea water desalting plant and method |
| CN102786108A (en) * | 2012-08-29 | 2012-11-21 | 山东潍坊润丰化工有限公司 | Brine desalting method and system |
| CN104326519A (en) * | 2013-07-23 | 2015-02-04 | 朱宝泉 | Evaporative condensation type sea water desalination device |
| CN104784948A (en) * | 2015-04-27 | 2015-07-22 | 卢征春 | Energy-saving atmospheric evaporation synthesis and recovery system |
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