Efficient organic wastewater evaporation device

Abstract

The utility model discloses an efficient organic wastewater evaporation device which comprises a funnel-shaped evaporator, an evaporation chamber is arranged in the funnel-shaped evaporator, a gas pipe, an immersion pipe and a circulation baffle are arranged in the evaporation chamber, the gas pipe is communicated with the immersion pipe, an injection nozzle is arranged on the immersion pipe, the immersion pipe is located in the circulation baffle, and the circulation baffle is communicated with the gas pipe. The circulating baffle is used for improving the gas-liquid mixing and stirring effect. High-temperature flue gas is introduced into the gas pipe, the immersion pipe is immersed in liquid, high-temperature gas in the gas pipe is rapidly mixed with the liquid, subjected to heat exchange and evaporated after being sprayed out of the injection nozzles on the immersion pipe, in the heat exchange process, the liquid formed in the circulating baffle flows upwards and forms evaporated liquid, and descending flow is formed outside the circulating baffle. Liquid flow difference is formed inside and outside the circulating baffle, the effect of stirring liquid can be achieved, the liquid is stirred for heat exchange and evaporation under the effect of the liquid flow difference, and the efficiency of the evaporation device is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment, and particularly relates to an efficient evaporation device for organic wastewater. Background Art

[0002] With the rapid development of society and the needs of production and life, a large amount of high-salt organic waste liquid has been generated in the fields of mining, biomedicine, and domestic waste. At present, the main methods for treating high-salt organic wastewater are physical and chemical methods and biochemical methods. Among them, physical and chemical methods include electrolysis, reverse osmosis, osmosis, distillation, incineration, etc. However, these methods have high treatment costs and problems such as secondary pollution. The biochemical method of using salt-tolerant bacteria to treat high-salt organic wastewater and the combination of physical and chemical-biological and process combinations have unique advantages and broad application prospects. However, in actual application, there are problems such as long debugging time, complex process, high requirements for the professional quality of operators, and the generation of a large amount of sludge, which is difficult to post-treat.

[0003] In view of the deficiencies of the above high-salt organic waste liquid treatment methods, submerged combustion evaporation, as an efficient reduction treatment method, has attracted increasing attention: the high-temperature gas directly exchanges heat with the liquid, improving the energy utilization efficiency; the absence of a partition wall for heat exchange reduces the risk of fouling and corrosion on the evaporation wall surface; the water vapor partial pressure is relatively low during the submerged evaporation process, achieving the effect of vacuum evaporation under atmospheric pressure conditions, which is beneficial to controlling the release amount of volatile organic compounds. The heat required for evaporation comes from anaerobic biogas or landfill gas, achieving the purpose of "treating waste with waste". Compared with conventional treatment technologies, the submerged combustion evaporation technology has the following advantages:

[0004] (1) Lower cost. The heat required for evaporation treatment can come from the anaerobic biogas and landfill gas in the factory area. It has low requirements for the quality of energy and can use local materials, turning waste gas into effective energy.

[0005] (2) No special requirements for water quality. It is not sensitive to the salt content and organic matter content of the incoming water. It has a wide range of evaporation load adjustment, good effluent quality; without partition wall heating, there is no fixed evaporation surface, it is not easy to scale, and the concentration ratio is high.

[0006] (3) The post-treatment after evaporation is simple and convenient. After evaporation, a viscous solid residue and salt mud are obtained, which can be landfilled or incinerated after pressing to prevent the circulation of pollutants and salts, achieving the closed-loop full quantification treatment of high-salt organic wastewater.

[0007] At present, the submerged combustion evaporation technology is widely used in various industries: in the vaporization process of liquefied natural gas (LNG), natural gas is compressed into LNG during transportation and is usually heated and vaporized by submerged combustion when output at the terminal. This is because the water bath temperature in the submerged combustion vaporization device is lower than the ignition point of natural gas, and even if there is gas leakage, it will be washed away by the water flow; in the traditional energy-consuming industry - the glass industry, the submerged combustion melting technology is adopted, which can improve the melting efficiency, glass quality and reduce the unit energy consumption; in the field of landfill leachate treatment, the submerged combustion evaporation solves problems such as the treatment of membrane concentrates such as nanofiltration and reverse osmosis.

[0008] Although the submerged combustion evaporation is widely used, many problems that need to be solved urgently have also emerged during its use; among them, the evaporation efficiency, which has the most important impact on the performance of the evaporator, increases slowly. For a specific evaporator, its evaporation efficiency is closely related to the immersion depth of the evaporation liquid, the concentration ratio and the structural design.

[0009] Immersion depth: The immersion depth determines the adequacy of heat transfer between gas and liquid; with a smaller immersion depth, the heat transfer between gas and liquid is insufficient, and the heat in the high-temperature flue gas cannot be effectively transferred to the liquid phase, resulting in low heat transfer efficiency; while when the immersion depth is too high, the back pressure of the combustion chamber increases, and the power consumption of the fuel and gas pipelines is large, reducing the economy. As the immersion depth increases, the heat transfer efficiency between gas and liquid will continuously increase, and when the immersion depth increases to a certain level, the heat transfer between gas and liquid has reached the limit, the heat transfer efficiency between gas and liquid no longer increases, and too high an immersion depth will weaken the evaporation chamber circulation, which is not conducive to heat and mass transfer.

[0010] Concentration ratio: As the concentration ratio increases, the evaporation rate of the liquid phase continuously decreases. This is because as the concentration ratio increases, the density of the salt mud liquid phase continuously increases, which makes the density difference between gas and liquid continuously increase. Under the same working conditions, as the concentration ratio increases, the buoyancy of the gas phase in the liquid phase is greater, and the residence time in the liquid phase is shorter, and the heat transfer effect between gas and liquid deteriorates, resulting in a decrease in evaporation efficiency.

[0011] Equipment configuration: The current mainstream air distribution method of the evaporator is the direct injection type, and the gas-liquid heat transfer process has reached the limit, making it difficult to improve the evaporation efficiency; during the evaporation process, due to continuous salt mud deposition at the bottom of the evaporator, the drainage pipeline is blocked, resulting in the concentration ratio of the equipment being strictly limited.

[0012] In the existing publicly disclosed patent documents:

[0013] (1) For example, in the patent document with the authorization publication number CN1211289C and the name of the side - vertical submerged combustion evaporator for concentrated leachate, the burner is side - vertical. A tail nozzle is led out from the lower part of the burner and extends into the lower part of the evaporation area of the evaporator. The leachate feed pipe is introduced from above the side wall of the evaporator. Steam passes through the steam return pipe and is burned by the landfill gas burner to remove organic components. The concentrated leachate is discharged from the sedimentation area. This evaporator has the advantages of simple structure and flexible use. However, due to the direct - through salt discharge design, there is a risk of salt discharge pipeline blockage at high concentration ratios.

[0014] (2) Another example is the patent document with the publication number CN207990655U and the name of an intermediate - wall water - cooled direct - through porous flat submerged combustion device. In this device, high - temperature flue gas is in direct contact with the liquid to be evaporated, and then heat transfer and mass transfer occur. It has the advantages of fast heat transfer rate, high heat utilization rate, further extending the service life of silicon carbide sleeves and immersion tubes, reducing equipment cost investment, strengthening convective heat transfer, and partially reducing the noise and vibration during equipment operation. However, due to the water - cooled design, it has extremely high requirements for the quality of the evaporation liquid. Liquids with high salt content and high hardness cannot be processed, otherwise it will cause pipeline blockage and reduce the safety of the equipment.

[0015] (3) Still another example is the patent document with the authorization publication number CN1278963C and the name of the two - stage treatment method of evaporation incineration and evaporation concentration for landfill leachate. The submerged combustion evaporation technology is used to treat the concentrated liquid, which is divided into two stages: evaporation incineration and evaporation concentration, and is realized by a primary evaporator and a secondary evaporator respectively. The primary evaporator evaporates as many volatile organic compounds as possible from the leachate and then burns and destroys them through a secondary burner. The secondary evaporator aims to evaporate water from the leachate and concentrate the leachate. This device has obvious advantages in terms of pollution emission. However, since the steam circulates back to the combustion chamber, it increases the partial pressure of water vapor in the flue gas, resulting in an increase in evaporation temperature and a decrease in evaporation efficiency.

[0016] In summary, in order to meet the needs of industrial production, the submerged combustion evaporation technology urgently needs to be improved. Summary of the Invention

[0017] In order to solve the technical problem of low efficiency of traditional evaporators in the background technology, the main object of the present invention is to provide an efficient evaporation device for organic wastewater, which can solve the above problems.

[0018] In order to achieve the above object, the technical solution of the present invention is as follows: An efficient evaporation device for organic wastewater includes a funnel - shaped evaporator. The inside of the funnel - shaped evaporator is an evaporation chamber. The evaporation chamber is provided with a gas pipe, an immersion pipe and a circulation baffle. The gas pipe and the immersion pipe are communicated. The immersion pipe is provided with an ejector nozzle. The immersion pipe is located inside the circulation baffle, and the circulation baffle is used to enhance the gas - liquid mixing and stirring effect.

[0019] In this solution, a gas burner pipe, a submerged pipe and a circulation baffle are arranged in a funnel-shaped evaporator. High-temperature flue gas is introduced into the gas burner pipe. The submerged pipe is immersed in the liquid. After the high-temperature gas in the gas burner pipe is ejected from the ejector nozzle on the submerged pipe, it quickly mixes with the liquid, conducts heat exchange and evaporation. During the heat exchange process, since the submerged pipe is inside the circulation baffle, an upward liquid flow is formed inside the circulation baffle to form an evaporation liquid, and a downward flow is formed outside the circulation baffle. That is to say, a liquid flow difference is formed inside and outside the circulation baffle, which can stir the liquid. The liquid outside enters the circulation baffle from the bottom of the circulation baffle. The continuous circulation not only stirs the liquid for heat exchange and evaporation due to the action of the liquid flow difference, but also greatly improves the efficiency of the evaporation device. And the ejector nozzle has a jet force for spraying hot flue gas around, further improving the heat exchange and evaporation efficiency after the flue gas is ejected. The structure of this device is simple, and the circulation baffle is ingeniously conceived. It can stir the mailed wastewater in the funnel-shaped evaporator to cooperate with the gas burner pipe and the submerged pipe for heat exchange and evaporation after gas-liquid mixing. At the same time, the funnel-shaped evaporator is wider at the top and narrower at the bottom, and the evaporated salt sludge will sink downward, which is convenient for centralized treatment.

[0020] Further, the circulation baffle is an annular baffle that is wider at the top and narrower at the bottom and has openings at the top and bottom. The upper end of the circulation baffle faces the top of the funnel-shaped evaporator, and the ejector nozzle faces the upper opening of the circulation baffle. In this way, when gas-liquid mixing occurs, an upward flow will be formed by the flue gas driving the evaporation liquid inside the circulation baffle, and a downward flow will be formed outside the circulation baffle. The ejection process strengthens the internal and external circulation of the circulation baffle. At the same time, the diameter of the bottom of the circulation baffle is smaller, which reduces the flow velocity of the downward flow near the inner wall of the funnel-shaped evaporator, facilitating the separation of salt sludge and its downward settlement to the bottom of the funnel-shaped evaporator for discharge.

[0021] Further, the ejector nozzle includes a spray pipe, a bracket, an ejector pipe and a wire mesh. The spray pipe is installed on the submerged pipe. The ejector pipe is installed on the spray pipe through the bracket. The wire mesh is installed inside the ejector pipe. The submerged pipe, the spray pipe and the ejector pipe are connected. The ejector force is strengthened in the ejector pipe. After installing the wire mesh at the outlet end of the ejector pipe, it can break and further strengthen the mixing and distribution between gas and liquid, and can also break some impurity particles, facilitating their settlement to the inner bottom of the funnel-shaped evaporator for discharge.

[0022] Further, there are at least two submerged pipes, which are evenly distributed along the outer wall of the end of the gas burner pipe; there are at least two ejector nozzles on each submerged pipe. That is, multiple submerged pipes are evenly arranged along the outside of the gas burner pipe, and multiple ejector nozzles are arranged on each submerged pipe, greatly improving the evaporation efficiency after gas-liquid mixing.

[0023] Furthermore, a sludge well is provided at the bottom of the funnel-shaped evaporator. A drain pipe is also installed on the inclined side wall at the bottom of the funnel-shaped evaporator, and the drain pipe is located above the side of the sludge well. That is to say, the sludge well is located directly below the funnel-shaped evaporator, the drain pipe is located on the side wall, and the height of the drain pipe is higher than the height of the sludge well. When discharging the residual liquid after evaporation, the sludge will not block the drain pipe upwards, preventing the problem of sludge blocking the pipeline that often occurs during drainage.

[0024] Furthermore, a screw pump is installed on the sludge well, and a drain valve is installed on the drain pipe. The sludge has poor fluidity, and it is facilitated to be discharged by the pumping of the screw pump. The drain valve controls the drainage of the drain pipe.

[0025] Furthermore, a baffle plate is also installed on the inner wall at the top of the funnel-shaped evaporator. The baffle plate extends downward from the top wall of the funnel-shaped evaporator. When the evaporation liquid containing moisture floats upward to the baffle plate, it will condense into water droplets on the baffle plate and fall back into the liquid in the evaporation chamber.

[0026] Furthermore, the gas pipe extends downward from the top of the funnel-shaped evaporator, and a burner is correspondingly installed at the top of the gas pipe. A chimney and a demister are also installed at the top of the funnel-shaped evaporator. The burner is used to convert the gas into high-temperature flue gas, then transmit it into the gas pipe, and enter the combustion chamber to exchange heat with the organic wastewater to be evaporated.

[0027] Furthermore, a manhole, a liquid level gauge, a flushing water inlet, and a water inlet are also installed on the side wall of the funnel-shaped evaporator. The flushing water inlet and the water inlet are located on both sides of the funnel-shaped evaporator respectively; a handhole is also provided at the bottom of the funnel-shaped evaporator. The manhole and the handhole facilitate the maintenance personnel to carry out maintenance, and the liquid level gauge facilitates observing the water level of the internal organic wastewater in the funnel-shaped evaporator. The flushing water inlet and the water inlet are located on both sides of the funnel-shaped evaporator respectively, so that flushing and water inlet do not interfere with each other, and after the flushing water inlet is opened, the inner wall of the funnel-shaped evaporator can be flushed in all directions.

[0028] An evaporation method includes:

[0029] S1. Open the water inlet, and introduce the organic wastewater to a position 10 mm - 40 mm below the immersion pipe. Open the water inlet again 10 minutes after igniting the burner, and introduce the organic wastewater to a position 20 mm - 35 mm above the immersion pipe; if the initial liquid level is very high, the pressure at the gas outlet end of the gas pipe is large, and the burner is not easily ignited; adding an appropriate amount of wastewater initially can prevent dry burning and damage to the evaporator; after the flue gas is normally introduced into the gas pipe, introduce the liquid to an appropriate height. After continuous experiments, the evaporation efficiency is the highest when the liquid level is maintained at 20 mm - 35 mm above the immersion pipe.

[0030] S2. In the ejector pipe, gas-liquid is forced to mix. When it exits the ejector pipe, the wire mesh breaks, which reinforces the mixing and distribution between gas and liquid again (not understood), and breaks some impurity particles, facilitating the subsequent gas-liquid mixing evaporation and the sedimentation of large salt mud particles.

[0031] S3. The flue gas enters the evaporation chamber and mixes with the evaporation liquid again. After passing through the baffle plate, it condenses into liquid droplets and falls back into the evaporation liquid. Part of the flue gas is discharged from the chimney.

[0032] S4. Inside the circulation baffle, the flue gas drives the evaporation liquid to form an upward flow, while a downward flow is formed outside the circulation baffle. The flow rate of the downward flow near the inner wall of the funnel-shaped evaporator decreases, and the salt mud separates and enters the salt mud well. The circulation baffle plays a role in agitating the wastewater in the evaporation chamber to enter the circulation baffle for gas-liquid mixing and then evaporation, improving the efficiency.

[0033] S5. When the evaporation ends, the burner is turned off. The combustion-supporting air continues to enter the gas pipe. When the temperature in the gas pipe drops below 100 °C, the fan is turned off, the drain pipe and the screw pump are opened to discharge the residual liquid and the salt mud respectively; the flushing water inlet is opened for flushing.

[0034] Compared with the prior art, the advantages of the present invention are as follows:

[0035] (1) A circulation baffle is arranged around the immersion pipe in the funnel-shaped evaporator. In this way, when gas-liquid is mixed and evaporated, a liquid flow difference is formed inside and outside the circulation baffle, continuously agitating the organic wastewater in the evaporation chamber and improving the evaporation efficiency.

[0036] (2) A wire mesh is arranged inside the ejector nozzle on the immersion pipe, which can break and further strengthen the mixing and distribution between gas and liquid, and also break some impurity particles, facilitating the sedimentation to the bottom of the funnel-shaped evaporator and then being discharged.

[0037] (3) The drain pipe is located above the side of the salt mud well and discharges separately, solving the problem that the salt mud will block the drain pipe.

[0038] (4) A baffle plate is also installed on the inner wall of the top of the funnel-shaped evaporator. The evaporation liquid will condense into liquid again and fall back into the combustion chamber here. Description of the Drawings

[0039] In order to make the content of the present invention easier to be clearly understood, the following further details the present invention according to specific embodiments in combination with the drawings, where

[0040] Figure 1 is the overall structural schematic diagram of the evaporation device in the present invention;

[0041] Figure 2 is the side view of the circulation baffle in the present invention;

[0042] Figure 3It is the top view of the circulation baffle in the present invention;

[0043] Figure 4 It is the structural schematic diagram of the immersion pipe arranged on the outer periphery of the gas pipe in the present invention;

[0044] Figure 5 It is the structural schematic diagram of the ejector nozzle in the present invention.

[0045] Explanation of reference numerals: 1 Burner; 2 Chimney; 3 Demister; 4 Manhole; 5 Liquid level gauge; 6 Drain valve; 7 Baffle plate; 8 Immersion pipe; 9 Gas pipe; 10 Ejector nozzle; 10-1 Nozzle; 10-2 Bracket; 10-3 Ejector pipe; 10-4 Wire mesh; 11 Funnel-shaped evaporator; 12 Evaporation chamber; 13 Circulation baffle; 14 Handhole; 15 Sludge well; 16 Screw pump; 17 Flushing water inlet; 18 Water inlet. Detailed implementation manners

[0046] The present invention will be described in detail below in conjunction with the embodiments shown in the drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present invention.

[0047] Embodiment:

[0048] As Figure 1As shown in the figure, the present invention provides an efficient evaporation device for organic wastewater, including a funnel-shaped evaporator 11. Inside the funnel-shaped evaporator 11 is an evaporation chamber 12. Inside the evaporation chamber 12, there are a gas burner pipe 9, an immersion pipe 8, and a circulation baffle 13. The gas burner pipe 9 is connected to the immersion pipe 8. An ejector nozzle 10 is provided on the immersion pipe 8. The immersion pipe 8 is located inside the circulation baffle 13, and the circulation baffle 13 is used to enhance the gas-liquid mixing and agitation effect. In this solution, a gas burner pipe 9, an immersion pipe 8, and a circulation baffle 13 are arranged in the funnel-shaped evaporator 11. High-temperature flue gas is introduced into the gas burner pipe 9, and the immersion pipe 8 is immersed in the liquid. After the high-temperature gas in the gas burner pipe 9 sprays out from the ejector nozzle 10 on the immersion pipe 8, it quickly mixes with the liquid, conducts heat exchange, and evaporates. During the heat exchange process, since the immersion pipe 8 is inside the circulation baffle 13, liquid flows upward inside the circulation baffle 13 to form evaporation liquid, while a downward flow is formed outside the circulation baffle 13. That is to say, a liquid flow difference is formed inside and outside the circulation baffle 13, which can play a role in agitating the liquid. The external liquid enters the circulation baffle 13 from the bottom of the circulation baffle 13. Continuous circulation not only agitates the liquid for heat exchange and evaporation due to the liquid flow difference, but also greatly improves the efficiency of the evaporation device. And the ejector nozzle 10 has a jet force for spraying hot flue gas around, further improving the heat exchange and evaporation efficiency after the flue gas is sprayed. The structure of this device is simple, and the concept of the circulation baffle 13 is ingenious. It can agitate the mailed wastewater in the funnel-shaped evaporator 11 to cooperate with the gas burner pipe 9 and the immersion pipe 8 for heat exchange and evaporation after gas-liquid mixing. At the same time, the upper part of the funnel-shaped evaporator 11 is wide and the lower part is narrow, and the evaporated salt sludge will sink downward, facilitating centralized treatment.

[0049] Preferably, a salt sludge well 15 is provided at the bottom of the funnel-shaped evaporator 11. A drain pipe is also installed on the inclined side wall at the bottom of the funnel-shaped evaporator 11. The drain pipe is located above the side of the salt sludge well 15. That is to say, the salt sludge well 15 is located directly below the funnel-shaped evaporator 11, the drain pipe is located on the side wall, and the height of the drain pipe is higher than the height of the salt sludge well 15. When discharging the residual liquid after evaporation, the salt sludge will not block the drain pipe upward, preventing the problem of salt sludge blocking the pipeline often encountered during drainage. A screw pump 16 is installed on the salt sludge well 15, and a drain valve 6 is installed on the drain pipe. The salt sludge has poor fluidity, and it is facilitated to be discharged by the pumping of the screw pump. The drain valve 6 controls the drainage of the drain pipe.

[0050] Preferably, a baffle plate 7 is also installed on the inner wall at the top of the funnel-shaped evaporator 11. The baffle plate 7 extends downward from the top wall of the funnel-shaped evaporator 11. When the evaporation liquid containing moisture floats upward to the baffle plate 7, it will condense into water droplets on the baffle plate 7 and fall back into the liquid in the evaporation chamber 12.

[0051] Preferably, the gas pipe 9 extends downward from the top of the funnel-shaped evaporator 11. A burner 1 is correspondingly installed at the top of the gas pipe 9. A chimney 2 and a demister 3 are also installed at the top of the funnel-shaped evaporator 11. The burner 1 is used to convert gas into high-temperature flue gas, which is then transmitted into the gas pipe 9. After entering the combustion chamber, it exchanges heat with the organic wastewater to be evaporated.

[0052] Preferably, a manhole 4, a liquid level gauge 5, a flushing water inlet 17 and a water inlet 18 are further installed on the side wall of the funnel-shaped evaporator 11. The flushing water inlet 17 and the water inlet are located on both sides of the funnel-shaped evaporator 11 respectively; a handhole 14 is further provided at the bottom of the funnel-shaped evaporator 11. The manhole 4 and the handhole 14 facilitate maintenance by maintenance personnel, and the liquid level gauge

[0053] 5 facilitates observing the water level of the internal organic wastewater in the funnel-shaped evaporator 11. The flushing water inlet 17 and the water inlet 18 are located on both sides of the funnel-shaped evaporator 11 respectively, so that flushing and water inlet do not interfere with each other. After the flushing water inlet 17 is opened, the inner wall of the funnel-shaped evaporator 11 can be flushed in all directions.

[0054] As Figures 1 - 3 shown, the circulating baffle 13 is an annular baffle with a wider upper part and a narrower lower part and upper and lower openings. The upper end of the circulating baffle faces the top of the funnel-shaped evaporator 11, and the ejector nozzle 10 faces the upper opening of the circulating baffle. In this way, when gas-liquid is mixed, an upward flow will be formed in the circulating baffle 13 by the flue gas driving the evaporation liquid, and a downward flow will be formed outside the circulating baffle 13. The ejection process strengthens the internal and external circulation of the circulating baffle 13. At the same time, the diameter of the bottom of the circulating baffle 13 is smaller, so that the flow rate of the downward flow near the inner wall of the funnel-shaped evaporator 11 is reduced, which facilitates the separation of salt sludge and sedimentation downward to the bottom of the funnel-shaped evaporator 11 and then discharged.

[0055] As Figure 4 shown, there are at least two immersion pipes 8, which are evenly distributed along the outer wall of the end of the gas pipe 9; there are at least two ejector nozzles 10 on each immersion pipe 8. That is, a plurality of the immersion pipes 8 are evenly arranged along the outside of the gas pipe 9, and a plurality of ejector nozzles 10 are arranged on each immersion pipe 8, greatly improving the evaporation efficiency after gas-liquid mixing.

[0056] As Figure 5As shown, the ejector nozzle 10 includes a nozzle tube 10-1, a bracket 10-2, an ejector tube 10-3, and a wire mesh 10-4. The nozzle tube 10-1 is installed on the immersion tube 8. The ejector tube 10-3 is installed on the nozzle tube 10-1 through the bracket 10-2. The wire mesh 10-4 is installed inside the ejector tube 10-3. The immersion tube 8, the nozzle tube 10-1, and the ejector tube 10-3 are in communication. The ejector force is strengthened in the ejector tube 10-3. After installing the wire mesh 10-4 at the outlet end of the ejector tube 10-3, the mixing and distribution between gas and liquid can be broken and strengthened again, and some impurity particles can also be broken, facilitating sedimentation to the bottom of the funnel-shaped evaporator 11 and then being discharged.

[0057] An evaporation method includes:

[0058] S1. Open the water inlet, introduce organic wastewater to a position 10 mm - 40 mm below the immersion tube 8, and then open the water inlet again 10 minutes after igniting the burner 1 to introduce organic wastewater to a position 20 mm - 35 mm above the immersion tube 8. If the initial liquid level is very high, the pressure at the gas outlet end of the gas pipe 9 is high, and the burner 1 is not easily ignited. Add an appropriate amount of wastewater initially to prevent dry burning and damage to the evaporator. After the flue gas is normally introduced into the gas pipe 9, introduce the liquid to an appropriate height. After continuous experiments, the evaporation efficiency is the highest when the liquid level is maintained at 20 mm - 35 mm above the immersion tube 8.

[0059] S2. Force the mixing of gas and liquid in the ejector tube 10-3. When exiting the ejector tube 10-3, the wire mesh 10-4 breaks and strengthens the mixing and distribution between gas and liquid again (not understood), and breaks some impurity particles, facilitating the subsequent gas-liquid mixed evaporation and the sedimentation of large salt sludge particles.

[0060] S3. The flue gas enters the evaporation chamber 12 and mixes with the evaporation liquid again, and after passing through the baffle 7, it condenses into liquid droplets and falls back into the evaporation liquid, and part of the flue gas is discharged from the burner 2;

[0061] S4. Inside the circulation baffle 13, the flue gas drives the evaporation liquid to form an upward flow, while a downward flow is formed outside the circulation baffle 13. The flow rate of the downward flow near the inner wall of the funnel-shaped evaporator 11 decreases, and the salt sludge separates and enters the salt sludge well 15. The circulation baffle 13 plays a role in agitating the wastewater in the evaporation chamber 12 to enter the circulation baffle 13 for gas-liquid mixing and then evaporation, improving the efficiency.

[0062] S5. When the evaporation ends, turn off the burner 1. The combustion-supporting air continues to enter the gas pipe 9. When the temperature inside the gas pipe 9 drops below 100 °C, turn off the fan, open the drain pipe and the screw pump 16 to discharge the residual liquid and the salt sludge respectively; open the flushing water inlet 17 for flushing.

[0063] Working principle: Open the water inlet, and introduce organic wastewater to a position 10 mm - 40 mm below the immersion pipe 8. After igniting the burner 1, open the water inlet again after 10 minutes, and introduce organic wastewater to a position 20 mm - 35 mm above the immersion pipe 8; Under the action of the ejector nozzle 10, the waste liquid undergoes gas-liquid mixing for heat exchange and evaporation. The inner and outer circulation of the circulation baffle 13 stirs to improve the evaporation efficiency. The vaporized evaporation liquid condenses water droplets at the position of the baffle 7 and then falls back into the combustion chamber again. The flue gas is discharged from the burner 2; When finishing, first close the burner 1. The combustion-supporting air continues to enter the gas pipe 9. When the temperature in the gas pipe 9 drops to

[0064] below 100 °C, turn off the fan, and open the drain pipe and the screw pump

[0065] 16, and discharge the residual liquid and salt sludge respectively; Finally, open the flushing water inlet 17 to flush the inner wall of the evaporator.

[0066] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0067] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An efficient evaporation device for organic wastewater, characterized in that, It includes a funnel-shaped evaporator (11). Inside the funnel-shaped evaporator (11) is an evaporation chamber (12). Inside the evaporation chamber (12), there are a gas burner pipe (9), a submerged pipe (8), and a circulation baffle (13). The gas burner pipe (9) is connected to the submerged pipe (8). An ejector nozzle (10) is provided on the submerged pipe (8). The submerged pipe (8) is located inside the circulation baffle (13), and the circulation baffle (13) is used to enhance the gas-liquid mixing and agitation effect.

2. The high-efficiency evaporation device for organic wastewater according to claim 1, wherein The circulation baffle (13) is an annular baffle that is wider at the top and narrower at the bottom and has openings at both the top and bottom.

3. The high-efficiency evaporation device for organic wastewater according to claim 1, wherein, The ejector nozzle (10) includes a nozzle pipe (10-1), a bracket (10-2), an ejector pipe (10-3), and a wire mesh (10-4). The nozzle pipe (10-1) is installed on the submerged pipe (8). The ejector pipe (10-3) is installed on the nozzle pipe (10-1) through the bracket (10-2). The wire mesh (10-4) is installed inside the ejector pipe (10-3). The submerged pipe (8), the nozzle pipe (10-1), and the ejector pipe (10-3) are connected.

4. An efficient evaporation device for organic wastewater according to claim 1, characterized in that, There are at least two submerged pipes (8), which are evenly distributed along the outer wall of the end of the gas burner pipe (9); there are at least two ejector nozzles (10) on each submerged pipe (8).

5. An efficient evaporation device for organic wastewater according to claim 1, characterized in that, A slime well (15) is provided at the bottom of the funnel-shaped evaporator (11). A drain pipe is also installed on the inclined side wall at the bottom of the funnel-shaped evaporator (11), and the drain pipe is located above the side of the slime well (15).

6. An efficient evaporation device for organic wastewater according to claim 5, characterized in that, A screw pump (16) is installed on the slime well (15), and a drain valve (6) is installed on the drain pipe.

7. An efficient evaporation device for organic wastewater according to claim 1, characterized in that, A baffle plate (7) is also installed on the inner wall at the top of the funnel-shaped evaporator (11), and the baffle plate (7) extends downward from the top wall of the funnel-shaped evaporator (11).

8. An efficient evaporation device for organic wastewater according to claim 1, characterized in that, The gas burner pipe (9) extends downward from the top of the funnel-shaped evaporator (11). A burner (1) is correspondingly installed at the top of the gas burner pipe (9). A chimney (2) and a demister (3) are also installed at the top of the funnel-shaped evaporator (11).

9. An efficient evaporation device for organic wastewater according to claim 1, characterized in that, A manhole (4), a liquid level gauge (5), a flushing water inlet (17), and a water inlet (18) are also installed on the side wall of the funnel-shaped evaporator (11). The flushing water inlet (17) and the water inlet are located on both sides of the funnel-shaped evaporator (11); a handhole (14) is also provided at the bottom of the funnel-shaped evaporator (11).

Images