CN114804270B - A wastewater reduction method combining hyperbolic tower and mechanical atomization evaporator - Google Patents

Abstract

The application relates to a wastewater treatment technology, and aims to provide a wastewater reduction method combining a hyperbolic tower and a mechanical atomization evaporator. Forming water mist vertically upwards by using a mechanical atomization evaporator, upwards diffusing and evaporating atomized liquid drops under the drive of continuous air flow, discharging water in the atomized liquid drops from the top of the tower through gasification, crystallizing and separating out inorganic salt components contained in the atomized liquid drops, and periodically collecting and processing the inorganic salt components by falling under the action of gravity; the larger droplets which are not atomized fall back into the wastewater tank under the action of gravity and then undergo the next round of circulation. The application can greatly improve the efficiency of natural evaporation, reduce the occupied area of the evaporation pond, reduce the risk of environmental pollution by a closed space, and can realize the water-salt separation with low carbon and high efficiency. The evaporation efficiency is improved and the process can be cycled. The application effectively collects salt particles and volatile organic compounds in the semi-closed tower, thereby avoiding polluting the surrounding environment; the application is energy-saving, material-saving, small in construction difficulty, small in occupied area and low in manufacturing cost.

Description

A wastewater reduction method combining hyperbolic tower and mechanical atomization evaporator

Technical field

The present invention relates to wastewater treatment technology, and in particular to a wastewater reduction method that combines a hyperbolic tower and a mechanical atomization evaporator.

Background technique

The treatment of salty and organic wastewater (including high-salt wastewater, desulfurization wastewater, aquaculture wastewater, etc.) generated during industrial production has always received widespread attention. Currently, there are two main options for treating this part of high-concentration wastewater: First, use the principle of evaporation and concentration to heat and evaporate the wastewater by burning coal, introducing boiler steam and other heat sources, and turning water and volatile organic matter into gaseous state. The salt is continuously concentrated, reaches saturated solubility, precipitates, and crystallizes into a solid state. Finally, the salt is dehydrated and dried into a solid, achieving zero discharge of waste water. Second, use natural evaporation ponds to reduce evaporation by taking advantage of natural geographical and climatic conditions. Both of the above options have their own advantages and disadvantages: the first option has a high degree of treatment and mature technology, but has high energy consumption per ton of water, and the average treatment cost per ton of water is more than 100 yuan; at the same time, the higher evaporation temperature causes Scale adheres and accumulates on the surface of the evaporator, which affects the stability and safety of the equipment operation and requires regular shutdown and descaling. The second method makes full use of natural conditions, has low operating costs, simple equipment management and maintenance, and long service life; but the disadvantage is that it covers a large area, is greatly affected by climate conditions, has low long-term efficiency, low evaporation, and has a negative impact on the evaporation pond. The anti-seepage requirements are high. Once leakage occurs, it will cause serious environmental pollution. In principle, it cannot be used to store wastewater containing volatile organic compounds. In actual situations, the application of evaporation ponds is difficult to solve the company's high-salt wastewater discharge problem, and there is also the risk of pond overflow or pond overflow.

For the above reasons, mechanical atomization evaporators, which are simple to operate and maintain, and have relatively low investment and operating costs, have become a new solution to cooperate with the natural evaporation of evaporation ponds. However, there is also the risk that the atomized wastewater droplets will fall out of the evaporation pond with the wind and pollute the surrounding environment. Moreover, this solution requires a large-area pool on site, and the water vapor generated by the mechanical atomization evaporator mist can easily accumulate in the evaporator. The saturated atmosphere formed in the surrounding environment of the evaporation pond is not conducive to further evaporation of sewage.

At present, there is no green, low-carbon, and efficient solution to treat high-concentration wastewater on the market. It has become a practical need to provide a new treatment method.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a wastewater reduction method that combines a hyperbolic tower and a mechanical atomization evaporator.

In order to solve the above technical problems, the solution adopted by the present invention is:

A wastewater reduction method that combines a hyperbolic tower and a mechanical atomization evaporator is provided. The method is based on the following wastewater reduction device; the device includes:

Wastewater tanks, which are circular in cross-section;

Support base, set around the edge of the wastewater pool;

The support frame is fixed on the support base and is a frame structure assembled from multiple single components;

The hyperbolic tower is a hollow structure with an open top and bottom composed of a lower ring beam, a tube wall and a top rigid ring. The side edges of its axial section are in a symmetrical hyperbola shape; the lower ring beam is fixedly installed on the support frame, and the double curved tower is composed of a lower ring beam, a tube wall and a top rigid ring. There is a gap between the bottom of the curved tower and the edge of the wastewater pool as an air inlet;

Mechanical atomizing evaporator is located in the waste pool, and its inlet end is connected to the water supply pipeline and water pump;

The salt collection device is a frustoconical cylinder arranged coaxially with the hyperbolic tower. Its upper opening is smaller than the lower opening, and the bottom is fixed at the edge of the waste pool;

This method specifically includes:

(1) Use a water pump to transport the wastewater in the wastewater pool to the mechanical atomization evaporator through the water supply pipeline. The mechanical atomization evaporator breaks it into droplets with a particle size of less than 10 microns, forming a liquid that can pass through the upper opening of the salt collection device. vertical upward water mist;

(2) Warm and dry new air enters the interior of the tower from the air inlet at the bottom of the hyperbolic tower; when the air enters the narrow place in the middle of the tower from the open area at the bottom of the tower, due to the reduction in the cross-sectional area in the tower, the airflow accelerates forward to produce continuous Strong winds can always maintain the gas flow inside the hyperbolic tower;

(3) The atomized droplets in the water mist diffuse upward and evaporate driven by the continuous air flow, and the water in them vaporizes rapidly and is discharged from the top of the tower; the inorganic salt components contained in it crystallize and separate, and fall to the salt due to gravity. On the particle collection device, it is collected and processed regularly by manual or mechanical equipment;

(4) Larger droplets that cannot be atomized, including salt, oil droplets and macromolecular organic matter, fall back into the wastewater pool under the action of gravity, and then undergo the next round of atomization and evaporation, water and salt separation, and droplet fall back. the process of;

(5) Through the above-mentioned cyclic process, the purpose of removing salt from wastewater is achieved.

As a preferred solution of the present invention, when treating odor-containing wastewater, an adsorption-type exhaust gas deodorization device is installed at the top opening of the hyperbolic tower to adsorb odor substances in the atomized steam.

As a preferred solution of the present invention, waste water is preheated by using factory waste heat or waste heat in winter; the heated wastewater is then transported to a mechanical atomization evaporator to accelerate diffusion and evaporation.

As a preferred solution of the present invention, the main design features of the hyperbolic tower include: total height H of the tower body, diameter D ₁ of the tower bottom, height h of the air inlet, diameter D ₂ of the throat, and height H _a of the throat; preferably Design dimensions are as follows:

(1) The height of the hyperbolic tower is 25 to 100 meters, the diameter of the tower bottom is 15 to 60 meters, and the ratio of the total height of the tower to the diameter of the tower bottom is H/D ₁ = 1.2 to 1.4;

(2) The ratio of the height of the air inlet to the diameter of the tower bottom h/D ₁ =0.08~0.09;

(3) The ratio of the throat diameter to the tower bottom diameter D ₂ /D ₁ =0.5~0.6; the ratio of the throat height to the total height of the tower H _a /H = 0.7~0.8;

(4) The tangent value of the angle between the bottom edge of the shell and the vertical axis tanθ=0.30~0.35.

As a preferred solution of the present invention, the support base and support frame are made of stainless steel, or hot-dip galvanized or carbon steel materials coated with anti-corrosion coating; the inner wall surface of the hyperbolic tower is thermally sprayed with anti-corrosion material , or lined with corrosion-resistant plastic or fiberglass.

As a preferred solution of the present invention, the support base and support frame have any of the following installation methods:

(1) The support base is ring-shaped around the edge of the waste pool, the support frame is arranged in a ring shape on the support base, and the gaps between the individual components of the support frame are used as air inlets;

(2) Multiple support bases are evenly arranged around the edge of the waste pool in a point shape, and the support frame is arranged in a circular shape on each support base. The gaps between the bottom of the tower and the waste pool and between the individual components of the support frame are used as tuyere;

(3) The support base is in a circular shape surrounding the edge of the waste pool, and multiple support frames are evenly arranged on the support base in a point shape. The gaps between the bottom of the tower and the support base and between the individual components of the support frame are used as tuyere;

(4) Multiple support bases are evenly arranged around the edge of the waste pool in a point shape. A separate support frame is set on each support base. The gaps between the bottom of the tower and the waste pool and between the individual components of the support frame are used as air inlets.

As a preferred embodiment of the present invention, the mechanical atomization evaporator has any one of the following arrangement methods:

(1) There is one mechanical atomization evaporator located in the center of the waste pool;

(2) There are multiple mechanical atomization evaporators, which are evenly arranged in the waste pool in a circumferential direction and maintain axial symmetry with the hyperbolic tower;

(3) There are multiple mechanical atomization evaporators, one of which is located in the center of the waste pool, and the rest are evenly arranged in the waste pool in a circumferential direction and maintain axial symmetry with the hyperbolic tower;

(4) There are multiple mechanical atomization evaporators, which are evenly arranged on the surface of the waste pool in a point shape.

As a preferred solution of the present invention, the water pump is installed on the floating platform; there are multiple mechanical atomization evaporators, and each mechanical atomization evaporator is equipped with a water pump respectively, or shares a water pump.

As a preferred solution of the present invention, several inspection doors are provided at the bottom of the tower wall of the hyperbolic tower.

As a preferred solution of the present invention, the edge of the waste pool is provided with an annular plate extending inward, and the bottom edge of the frustoconical cylinder of the salt collection device is fixedly connected to the inner edge of the annular plate by welding.

Description of the invention principle:

1. The present invention uses a broken mechanical atomization evaporator to quickly atomize the incoming wastewater into small droplets, greatly increasing the contact area between concentrated salt water and air, and increasing the evaporation speed. At the same time, warm and dry new air is introduced, and the "draft" of the hyperbolic tower is used to blow the atomized droplets upward. During this process, the water mist diffuses and evaporates upward toward the top of the tower, and the salt particles precipitate and are collected by the salt collection device to achieve water-salt separation; while large droplets containing particles such as salt, oil droplets, and macromolecular organic matter are It falls back to the wastewater pool under the action of gravity, and circulates for atomization and evaporation, which can continuously evaporate, reduce and treat wastewater.

2. The working principle of the broken mechanical atomization steamer is to use special high-speed rotating blades to break the liquid pumped out by the water pump multiple times. The water droplets are thrown high into the sky under the high-speed rotation of the impeller at the same time, and the water droplets fall to complete the evaporation process. The applicant compared several types of atomized evaporators and found that the broken mechanical atomized evaporator has the best evaporation effect for high-salt wastewater in evaporation ponds and is therefore the most suitable.

3. The natural ventilation conditions of the hyperbolic tower provide power for the upward diffusion and evaporation of atomized droplets and the upward flow of water vapor, reducing the installation and maintenance costs and energy consumption of fan power equipment. Therefore, this structure is easier to maintain than a mechanical ventilation tower and saves electrical energy; at the same time, the hyperbolic tower occupies a smaller area than an evaporation pond, has a compact layout, and has less water loss.

4. The semi-open hyperbolic tower limits the evaporation of wastewater and the crystallization and solidification of salt in a relatively closed space, and uses a salt collection device to capture and collect the salt particles, thus preventing the salt particles from floating randomly and polluting the environment.

5. The hyperbolic tower limits the evaporation of volatile organic compounds in wastewater to a semi-enclosed space, and can use exhaust gas deodorization equipment to further collect volatile organic compounds, thus preventing organic matter in wastewater from evaporating with the evaporation of water and causing pollution. Atmospheric Environment.

6. The hyperbolic tower wall shape is used to take advantage of the natural strong wind formed when the air enters the narrow valley mouth from the open area, the cross-sectional area of the airflow is reduced, and the circulating airflow accelerates forward. From a structural point of view, the hyperbolic tower wall has curvature in both the horizontal and vertical directions. Compared with the cylindrical and conical towers, the stress in the lower half of the tower wall is smaller, and the wall thickness is reduced, which can be achieved with the same material. Greater volume.

Compared with the existing technology, the technical effects of the present invention are:

1. By effectively combining the advantages of the mechanical atomization evaporator to accelerate evaporation and the hyperbolic tower's natural ventilation, the present invention greatly improves the efficiency of natural evaporation and reduces the area occupied by the evaporation pond. At the same time, the enclosed space reduces the risk of environmental pollution and can It is used to treat desulfurization wastewater from thermal power plants, high-salt wastewater from coal chemical industry, livestock breeding wastewater, landfill leachate, food processing wastewater, etc., to achieve water-salt separation with low carbon and high efficiency.

2. This invention is based on a hyperbolic tower and a mechanical atomization evaporator, performs atomization and evaporation in a semi-enclosed space, and makes full use of the advantages of the "draft" of the hyperbolic tower to effectively realize and improve the discharge of atomized vapor and the fall of large droplets. , thus forming a stable process of "introducing dry air → discharging moisture", achieving an effect similar to atomization and evaporation in an evaporation pond, but improving the evaporation efficiency, and the process can be cycled.

3. The present invention limits the atomization and evaporation of waste water, the crystallization and solidification of salt, and the volatilization of organic matter in a semi-closed tower, and effectively collects salt particles and volatile organic matter to avoid contaminating the surrounding environment.

4. The present invention can use auxiliary heating equipment to increase the temperature of concentrated brine and increase the evaporation of waste water. The required heating source can be used as waste heat from the factory, thereby saving costs.

5. The present invention saves energy and materials, has low construction difficulty, small area and low cost.

Description of the drawings

Figure 1 is a schematic structural diagram of the wastewater reduction device in the present invention.

The reference numbers in the figure are: 1-hyperbolic tower; 2-mechanical atomization evaporator; 3-salt collection device; 4-waste pool; 5-water pump; 6-water supply pipeline; 7-support frame; 8- Support base; 9-Exhaust gas deodorization equipment.

Detailed ways

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The method of wastewater reduction that combines a hyperbolic tower and a mechanical atomization evaporator according to the present invention is implemented based on a wastewater reduction device; as shown in Figure 1, the device includes: a wastewater pool 4, with a cross section It is circular in shape; the support base 8 is set around the edge of the waste pool 4; the support frame 7 is fixed on the support base 8 and is a frame structure assembled from multiple single components; the hyperbolic tower 1 is composed of a lower ring The hollow structure is composed of a beam, a tube wall and a top rigid ring with top and bottom openings. The side edges of its axial section are in a symmetrical hyperbolic shape; the lower ring beam is fixedly installed on the support frame 7, and the bottom of the hyperbolic tower 1 is in contact with the wastewater. There is a gap as an air inlet between the edges of the pool 4; the mechanical atomization evaporator 2 is located above the liquid level in the waste pool 1, and its inlet end is connected to the water supply pipe 6 and the water pump 5; the salt particle collection device 3 is connected with The hyperbolic tower 1 is a coaxially arranged frustoconical cylinder, the upper opening of which is smaller than the lower opening, and the bottom is fixed on the edge of the wastewater pool 4 . The edge of the wastewater pool 4 can be further provided with an annular plate extending inward, and the bottom edge of the frustoconical cylinder of the salt collection device 3 is fixedly connected to the inner edge of the annular plate by welding. Several access doors are provided at the bottom of the tower wall of the hyperbolic tower 1.

The material of the support base 8 and the support frame 7 can be stainless steel, or hot-dip galvanized or carbon steel with anti-corrosion coating on the outside; the inner wall surface of the hyperbolic tower 1 is thermally sprayed with anti-corrosion material, or with corrosion resistance. Plastic or fiberglass lining. The support base 8 and the support frame 7 have any one of the following installation methods: (1) the support base 8 is in a circular shape surrounding the edge of the waste pool 4, and the support frame 7 is arranged in a circular shape on the support base 8 to support the frame 7 The gaps between the individual components are used as air inlets; (2) Multiple support bases 8 are evenly arranged around the edge of the waste pool 4 in a point shape, and the support frame 7 is arranged in an annular shape on each support base 8, with the bottom of the tower The gaps between the waste pool 4 and the individual components of the support frame 7 are used as air inlets; (3) the support base 8 is in a circular shape surrounding the edge of the waste pool 4, and multiple support frames 7 are evenly arranged in a point shape on the edge of the waste pool 4. On the support base 8, the gap between the tower bottom and the support base 8 and between the individual components of the support frame 7 is used as the air inlet; (4) multiple support bases 8 are evenly arranged in a point shape around the edge of the waste pool 4, A separate support frame 7 is provided on each support base 8, and the gap between the tower bottom and the waste pool and between the individual components of the support frame 7 is used as an air inlet. Each of the above options can be selected based on comprehensive consideration of factors such as the size of the waste pool 4, the size of the hyperbolic tower 1, the wastewater treatment capacity, etc., to obtain the most appropriate air intake volume.

The mechanical atomization evaporator 2 can use a high-speed rotating fluid atomizing device, a mechanical atomizing device that uses a high-speed rotating machine to atomize, a pneumatic atomizing device that uses high-speed airflow to violently impact the liquid and then expands it, or an ultrasonic atomizing device. The installation method is to install a buoyancy tube at the bottom and place it on the water surface of the wastewater pool, or the bottom is fixed to the wastewater pool. The atomization direction can also be horizontal or vertical downward. In order to maximize efficiency, the present invention selects the mechanical atomization evaporator 2 to be located within the projection range of the upper opening of the salt particle collection device 3, and the atomization direction is vertically upward. The salt particle collection device 3 can also choose a plurality of separate extending inclined plates to replace the overall frustoconical cylinder structure. The specific configuration quantity can be determined based on the actual salt content of the incoming water and whether the salt particles leak during the evaporation process.

The mechanical atomization evaporator 2 can have any of the following layout methods: (1) there is one mechanical atomization evaporator 2, located in the center of the waste pool 4; (2) there are multiple mechanical atomization evaporators 2, They are evenly arranged in the waste pool 4 in a circumferential direction and maintain axial symmetry with the hyperbolic tower 1; (3) There are multiple mechanical atomization evaporators 2, one of which is located in the center of the waste pool 4, and the rest are arranged in a circular manner. They are evenly arranged in the waste pool and maintain axial symmetry with the hyperbolic tower 1; (4) There are multiple mechanical atomization evaporators 2, which are evenly arranged on the surface of the waste pool in a point shape. The water pump 5 is installed on the floating platform; when there are multiple mechanical atomization evaporators 2, each mechanical atomization evaporator 2 is equipped with a water pump 5 to facilitate control and maintenance, or a water pump 5 is shared to reduce costs. .

Based on the above device, the wastewater reduction method combined with hyperbolic tower and mechanical atomization evaporator specifically includes:

(1) Use the water pump 5 to transport the wastewater in the waste pool 4 to the mechanical atomization evaporator 2 through the water supply pipe 6. The mechanical atomization evaporator 2 breaks it into liquid droplets with a particle size of less than 10 microns, forming salt particles that can pass through Collect vertical upward water mist from the upper opening of device 3;

(2) Warm and dry new air enters the interior of the tower from the air inlet at the bottom of hyperbolic tower 1; when the air enters the narrow place in the middle of the tower from the open area at the bottom of the tower, due to the reduction in the cross-sectional area in the tower, the airflow accelerates and advances. Continuous strong wind can always maintain the gas flow inside the hyperbolic tower 1;

(3) The atomized droplets in the water mist diffuse upward and evaporate driven by the continuous air flow, and the water in them vaporizes rapidly and is discharged from the top of the tower; the inorganic salt components contained in it crystallize and separate, and fall to the salt due to gravity. On the particle collection device 3, it is collected and processed regularly by manual or mechanical equipment;

(4) Larger droplets that cannot be atomized, including salt, oil droplets and macromolecular organic matter, fall back into the wastewater pool 4 under the action of gravity, and then undergo the next round of atomization evaporation, water-salt separation, droplet The process of falling back;

(5) Through the above-mentioned cyclic process, the purpose of removing salt from wastewater is achieved.

Specific application examples:

The hyperbolic tower 1 in this example includes a lower ring beam, a cylinder wall, and a top rigid ring. The lower ring beam is located at the bottom, and the self-weight of the tower and other loads it bears are transmitted to the foundation through the lower ring beam. The cylinder wall is the main part. It is a hyperbolic thin-walled space structure without ribs or columns that is conducive to natural ventilation. The inner wall can be treated with surface thermal spray corrosion-resistant paint or corrosion-resistant lining, or it can be directly made of plastic (such as PE (polyethylene) or fiberglass tube wall. The shape and wall thickness of the cylinder wall (shell) need to be checked through shell optimization calculation and buckling stability. The top rigid ring is located at the top of the hyperbolic tower to enhance the rigidity and stability of the top of the shell. The wastewater pool 4 for storing waste concentrated brine is located directly below the bottom of the tower. The wastewater pool is a circular pool about 2 meters deep under the ground and is built of reinforced concrete. The supporting parts of the hyperbolic tower 1 are built on the edge of the waste pool 4. The hyperbolic tower 1 is supported by the stainless steel support frame 7 (optional triangular frame) and the support base 8 arranged along the circumference of the waste pool 4, so that the tower body There is a gap between the bottom and the waste pool 4 as an air inlet, through which new air enters to form the required natural ventilation conditions. The space in the tower above the waste pool 4 is equipped with a salt particle collection device 3 for regularly processing the collected salt particles. The salt collecting device 3 can also play a role in reducing the inlet radius of the new air and planning the flow path to increase the inlet wind speed. A broken mechanical atomization evaporator 2 is arranged inside the hyperbolic tower 1. The mechanical atomization evaporator 2 is installed on a floating platform placed at the liquid level of the waste pool 4 through support columns. An impeller is provided on the power output shaft of the mechanical atomizing evaporator 2, and an annular nozzle hole is fixed below. The water outlet of the annular nozzle hole is located below the impeller. One or more mechanical atomization evaporators 2 are used according to the actual required evaporation amount. The atomization direction of the mechanical atomization evaporator 2 is vertical to the ground and upward. The mechanical atomization evaporator 2 can be arranged along the circumference of the tower or in the center. The water pump 5 is installed on the floating platform and is connected to the mechanical atomization evaporator 2 through the water supply pipe 6 that rises to the water surface of the waste pool 4 to transport concentrated brine to the mechanical atomization evaporator 2 . A certain number of inspection doors are provided on the bottom side wall of the hyperbolic tower 1 to facilitate internal inspection and cleaning of accumulated salt particles. The top air outlet of the hyperbolic tower 1 is optionally equipped with an adsorption exhaust gas deodorization equipment 9. The exhaust gas deodorization equipment 9 is an adsorption exhaust gas treatment device based on activated carbon and resin. If the high-concentration wastewater being treated does not contain volatile organic compounds or odorless pollutants (such as high salt water), the exhaust gas deodorization equipment 9 may be unnecessary to simplify the solution and save costs.

The above-mentioned wastewater reduction device can be used to evaporate and treat high-concentration wastewater containing salt and organic matter, evaporate and reduce the water in the wastewater, and effectively collect salt and organic matter. During specific use, warm and dry new air enters the tower body from the gap at the bottom of the hyperbolic tower 1. When the air enters the narrow part in the middle of the tower from the open place, the cross-sectional area of the airflow decreases, so the airflow accelerates forward. Strong winds are formed, resulting in continuous natural ventilation, that is, the "draft" shown in Figure 1. At the same time, the waste brine in the waste pool 4 below the tower is transported to the mechanical atomization evaporator 2 through the water supply pipeline 6 through the water pump 5. The high-speed rotating impeller of the mechanical atomization evaporator 2 breaks the water into particles below 10 microns. small droplets, forming water mist. Under the action of the "draft", the atomized small droplets diffuse upward and evaporate, and the moisture in them vaporizes rapidly and is discharged from the top of the tower. It is deodorized through the tail gas deodorization equipment 9 at the air outlet, while the inorganic salt components The crystals precipitate and fall to the salt particle collection device 3 due to gravity, and the collected salt particles are processed regularly. Unatomized large droplets containing particles such as salt, oil droplets, and macromolecular organic matter fall back into the wastewater pool under the action of gravity, and once again undergo the process of atomization and evaporation, separation of water and salt, and fall back, and the cycle continues. In cold winter, the concentrated brine in the wastewater pool can be preheated and then transported to the mechanical atomization evaporator to accelerate diffusion evaporation. The above process can achieve continuous atomization, evaporation, and reduction of high-concentration wastewater throughout the year. The required heating source can be used as waste heat from the factory, thereby saving costs.

Regarding the geometric dimensions of the main parts of the hyperbolic tower (total height H of the tower body, diameter D ₁ of the tower bottom, height h of the air inlet, diameter D ₂ of the throat, height H _{a of} the throat, unit: m), it is necessary to It is determined based on the amount of water required to be treated, as long as the ratio of tower height to tower bottom diameter is appropriate. For example, this application calculates based on optimization:

(1) The ratio H/D ₁ of the total height of the water tower to the diameter of the tower bottom is generally taken as: H/D ₁ =1.2~1.4;

Among them: the low value is suitable for windy areas; the high value is suitable for towers with high cost per unit area. The reasonable height of the hyperbolic tower is 25 to 100 meters, and the diameter of the tower bottom is 15 to 60 meters, which is determined according to the needs and quantity. If 25 meters is high enough, choose a 25-meter tower height, which can reduce costs.

(2) The ratio h/D ₁ between the height of the air inlet and the diameter of the tower bottom. This value directly affects the air flow pattern and aerodynamic resistance within the height range of the air inlet. Generally, it is taken as: h/D ₁ =0.08~0.09;

(3) The ratio of the diameter of the throat to the diameter of the tower bottom, D ₂ /D ₁ , and the ratio of the height of the throat to the total height of the tower, H _a /H, are generally taken as: D ₂ /D ₁ =0.5~0.6; H _a /H＝0.7～0.8;

(4) The tangent value tanθ of the angle between the bottom edge of the shell and the vertical axis. Using a larger value can reduce the wind stress and thereby reduce the pull-out force of the shell and the base. However, it will affect the stability of the shell and produce a larger force in the foundation. The horizontal force is generally taken as tanθ=0.30~0.35.

The applicant believes that the above has shown and described the basic principles and main features of the present invention and the advantages of the patent of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have other aspects. Various changes and modifications are possible, which fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. A wastewater reduction method that combines a hyperbolic tower and a mechanical atomization evaporator, characterized in that the method is implemented based on the following wastewater reduction device; the device includes: Wastewater tanks, which are circular in cross-section; Support base, set around the edge of the wastewater pool; The support frame is fixed on the support base and is a frame structure assembled from multiple single components; The hyperbolic tower is a hollow structure with an open top and bottom composed of a lower ring beam, a tube wall and a top rigid ring. The side edges of its axial section are in a symmetrical hyperbola shape; the lower ring beam is fixedly installed on the support frame, and the double curved tower is composed of a lower ring beam, a tube wall and a top rigid ring. There is a gap between the bottom of the curved tower and the edge of the wastewater pool as an air inlet; Mechanical atomizing evaporator is located in the waste pool, and its inlet end is connected to the water supply pipeline and water pump; The salt collection device is a frustoconical cylinder arranged coaxially with the hyperbolic tower. Its upper opening is smaller than the lower opening, and the bottom is fixed at the edge of the waste pool; This method specifically includes: (1) Use a water pump to transport the wastewater in the wastewater pool to the mechanical atomization evaporator through the water supply pipeline. The mechanical atomization evaporator breaks it into droplets with a particle size of less than 10 microns, forming a droplet that can pass through the upper opening of the salt collection device. vertical upward water mist; (2) Warm and dry new air enters the interior of the tower from the air inlet at the bottom of the hyperbolic tower; when the air enters the narrow place in the middle of the tower from the open area at the bottom of the tower, due to the reduction in the cross-sectional area in the tower, the airflow accelerates forward to produce continuous Strong winds can always maintain the gas flow inside the hyperbolic tower; (3) The atomized droplets in the water mist diffuse upward and evaporate driven by the continuous air flow, and the water in them vaporizes quickly and is discharged from the top of the tower; the inorganic salt components contained in it crystallize and precipitate, and fall to the salt due to gravity. On the particle collection device, it is collected and processed regularly by manual or mechanical equipment; (4) Larger droplets that cannot be atomized, including salt, oil droplets and macromolecular organic matter, fall back into the wastewater pool under the action of gravity, and then undergo the next round of atomization and evaporation, water-salt separation, and droplet fall back. the process of; (5) Through the above-mentioned cyclic process, the purpose of removing salt from wastewater is achieved; When treating wastewater containing odor, an adsorption exhaust gas deodorization device is installed at the top opening of the hyperbolic tower to absorb odorous substances in the atomized steam; In winter, the waste water is preheated using factory waste heat or waste heat; the heated wastewater is then transported to a mechanical atomization evaporator to accelerate diffusion and evaporation. 2. The method according to claim 1, characterized in that the main design features of the hyperbolic tower include: total tower height H, tower bottom diameter D ₁ , air inlet height h, throat diameter D ₂ , Throat height _Ha ; the preferred design dimensions are as follows: (1) The height of the hyperbolic tower is 25 to 100 meters, the diameter of the tower bottom is 15 to 60 meters, and the ratio of the total height of the tower to the diameter of the tower bottom is H/D ₁ =1.2~1.4; (2) The ratio of the height of the air inlet to the diameter of the tower bottom h/D ₁ =0.08~0.09; (3) The ratio of throat diameter to tower bottom diameter D ₂ /D ₁ =0.5~0.6; the ratio of throat height to total tower height _Ha /H=0.7~0.8; (4) The tangent value of the angle between the bottom edge of the shell and the vertical axis tanθ=0.30~0.35. 3. The method according to claim 1, characterized in that the support base and support frame are made of stainless steel, or hot-dip galvanized or carbon steel materials coated with anti-corrosion coating; the tower of the hyperbolic tower The surface of the inner wall is thermally sprayed with anti-corrosion materials, or lined with corrosion-resistant plastic or fiberglass. 4. The method according to claim 1, characterized in that the support base and the support frame have any one of the following installation methods: (1) The support base is in a circular shape surrounding the edge of the waste pool, and the support frame is arranged in a circular shape on the support base, with the gaps between the individual components of the support frame as the air inlet; (2) Multiple support bases are evenly arranged around the edge of the waste pool in a point shape, and the support frame is arranged in a circular shape on each support base. The gap between the bottom of the tower and the waste pool and between the individual components of the support frame is used as the center. tuyere; (3) The support base is ring-shaped around the edge of the waste pool, and multiple support frames are evenly arranged on the support base in a point shape. The gaps between the bottom of the tower and the support base and between the individual components of the support frame are used as the tuyere; (4) Multiple support bases are evenly arranged around the edge of the waste pool in a point shape. A separate support frame is set on each support base. The gaps between the bottom of the tower and the waste pool and between the individual components of the support frame are used as air inlets. 5. The method according to claim 1, characterized in that the mechanical atomization evaporator has any one of the following arrangement methods: (1) There is one mechanical atomization evaporator located in the center of the waste pool; (2) There are multiple mechanical atomization evaporators, which are evenly arranged in the waste pool in a circumferential direction and maintain axial symmetry with the hyperbolic tower; (3) There are multiple mechanical atomization evaporators, one of which is located in the center of the waste pool, and the rest are evenly arranged in the waste pool in a circumferential direction and maintain axial symmetry with the hyperbolic tower; (4) There are multiple mechanical atomization evaporators, which are evenly arranged on the surface of the waste pool in a point shape. 6. The method according to claim 1, characterized in that the water pump is located on a floating platform; there are multiple mechanical atomization evaporators, and each mechanical atomization evaporator is equipped with a water pump respectively, or Shared water pump. 7. The method according to claim 1, characterized in that several access doors are provided at the bottom of the tower wall of the hyperbolic tower. 8. The method according to claim 1, characterized in that an annular plate extending inward is provided at the edge of the waste pool, and the bottom edge of the frustoconical cylinder of the salt collection device is welded to the annular plate. The inner edge of the fixed connection.