Peculiar smell treatment device for rectification wastewater

Abstract

The utility model discloses a rectification wastewater odor treatment device, and relates to the field of rectification wastewater treatment. The device comprises a filter, a cooling tank and a supercritical water oxidation device, an inlet of the filter is connected with a rectification wastewater conveying pipeline, an outlet of the filter is connected with an inlet of the cooling tank through a filtered wastewater conveying pipeline, and an outlet of the cooling tank is connected with an inlet of the supercritical water oxidation device through a cooled wastewater conveying pipeline; the supercritical water oxidation device is also connected with an air supply pipeline; an air compressor is arranged on the air supply pipeline; a liquid outlet of the supercritical water oxidation device is connected with a liquid discharge pipeline; and a gas outlet of the supercritical water oxidation device is connected with an exhaust funnel through an exhaust pipeline. The rectification wastewater odor treatment device adopts a mode of combining pretreatment and supercritical oxidation to treat the odor of the rectification wastewater, so that the odor in the rectification wastewater can be effectively removed, and the wastewater discharged from the liquid outlet of the supercritical water oxidation device has no obvious odor and can be further discharged into a sewage treatment system for centralized treatment.

Description

Technical Field

[0001] The utility model relates to the field of distillation wastewater treatment, in particular to a device for treating odor of distillation wastewater. Background Art

[0002] High-concentration distillation wastewater has a serious impact on the water environment and is difficult to treat. If it is directly discharged, it will cause environmental pollution. Therefore, the treatment of distillation wastewater is one of the important environmental protection topics at home and abroad.

[0003] The Chinese utility model patent with the authorization announcement number CN220149254U discloses a high-nitrogen distillation wastewater treatment device, which includes a filter housing and a treatment housing, wherein the filter housing is arranged on the treatment housing, and the filter housing is slidably connected to the treatment housing. The main feature is that the volume of the entire treatment device can be changed according to demand, which is convenient for experimenters to store and carry the wastewater treatment device.

[0004] A Chinese utility model patent with authorization announcement number CN219376598U discloses a steam treatment device for wastewater from dithionite production. The device cooperates with a steam treatment structure for wastewater from dithionite production and a second vertical rod. When a motor is started, the cylinder is driven to rotate. The first vertical rod is driven up and down through a slide groove processed on the cylinder, and the limit plate is driven to slide up and down on a slideway processed in the shell, so that water droplets hanging on the first steel plate and the second steel plate fall down into a water tank, and the moisture is collected. Part of the moisture will not flow into the exhaust pump through the collection cover, and the exhaust pump will not be damaged, thereby reducing the equipment maintenance cost.

[0005] The above wastewater treatment devices are mainly designed to facilitate the collection and transportation of wastewater and reduce equipment maintenance costs. Their treatment of harmful components in wastewater, especially the odor control effect in distillation wastewater, needs to be further improved. Utility Model Content

[0006] Based on the above technical problems, the utility model proposes a device for treating odor in distillation wastewater, which can achieve a better treatment effect on the odor in distillation wastewater through pretreatment and supercritical oxidation.

[0007] The technical solution adopted by this utility model is:

[0008] A device for treating odor of distillation wastewater, comprising a pretreatment device, a cooling device and a supercritical water oxidation device; the pretreatment device comprises a filter, the inlet of the filter is connected to the distillation wastewater delivery pipeline, and the outlet of the filter is connected to the cooling device through the filtered wastewater delivery pipeline;

[0009] The cooling device comprises a cooling tank, a filtered wastewater delivery pipeline is connected to the inlet of the cooling tank, and the outlet of the cooling tank is connected to the inlet of the supercritical water oxidation device through the cooling wastewater delivery pipeline;

[0010] The supercritical water oxidation device is also connected to an air supply pipeline, on which an air compressor is arranged;

[0011] The liquid outlet of the supercritical water oxidation device is connected to a drainage pipe, on which a drainage pump is also arranged; the gas outlet of the supercritical water oxidation device is connected to an exhaust pipe, which is connected to an exhaust pipe, on which a fan is arranged.

[0012] Preferably, the distillation wastewater delivery pipeline is connected to the water outlet of the distillation tower.

[0013] Preferably, the filter comprises a filter housing, a filter screen and a packing layer are arranged inside the filter housing, and the packing layer is located above the filter screen.

[0014] Preferably, the cooling tank comprises a tank body, and a water cooling chamber is arranged on the outside of the tank body, the top of the water cooling chamber is connected to the cold water inlet, and the bottom of the water cooling chamber is connected to the cold water outlet.

[0015] Preferably, the supercritical water oxidation device comprises a supercritical water oxidation device body, and a heating and temperature raising device is arranged on the supercritical water oxidation device body.

[0016] Preferably, the drainage pipe is connected to a sewage treatment system.

[0017] The beneficial technical effects of the utility model are:

[0018] The utility model adopts a combination of pretreatment and supercritical oxidation to treat the odor of distillation wastewater, which can effectively remove the odor in the distillation wastewater. The wastewater discharged from the liquid outlet of the supercritical water oxidation device has no obvious odor and can be further discharged into the sewage treatment system for centralized treatment.

[0019] The utility model adopts the filtering and cold feeding method, so that the distillation wastewater first passes through the filter to remove the corrosive substances in the distillation wastewater, and then passes through the cooling tank for water cooling, which can effectively reduce the corrosiveness of the distillation wastewater to the subsequent supercritical water oxidation device and can improve the odor treatment effect of the distillation wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0021] Figure 1 This is a schematic diagram of the structural principle of an implementation method of the utility model;

[0022] Figure 2This is a schematic diagram of the structural principle of another embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the structural principle of the filter in the utility model;

[0024] Figure 4 This is a schematic diagram of the structural principle of the cooling tank in the utility model;

[0025] In the figure: 1-filter, 2-distillation wastewater delivery pipeline, 3-filtered wastewater delivery pipeline, 4-cooling tank, 5-cooling wastewater delivery pipeline, 6-supercritical water oxidation device, 7-air supply pipeline, 8-air compressor, 9-drainage pipeline, 10-drainage pump, 11-exhaust pipeline, 12-exhaust cylinder, 13-fan, 14-wastewater treatment system;

[0026] 101-filter housing, 102-filter screen, 103-filling layer;

[0027] 401 - tank body, 402 - water cooling chamber, 403 - cold water inlet, 404 - cold water outlet. DETAILED DESCRIPTION

[0028] Supercritical water oxidation technology has the advantages of thorough treatment, rapid reaction, and no secondary pollution. It is particularly advantageous in treating wastewater and waste that are difficult to treat with conventional methods. It is a technology with broad application prospects. Supercritical water oxidation has broad prospects in the fields of organic wastewater, sludge, and solid waste treatment.

[0029] When water is above its critical point (Tc=374℃, Pc=22.1MPa), it is in a state between liquid and gas. Compared with the state of normal water, it has significant differences in properties, specifically reduced hydrogen bonds, decreased density and ion product, and very low dielectric constant, which makes water completely miscible with non-polar organic matter and gas to form a single homogeneous system. This makes supercritical water have high diffusivity and fast transmission capacity.

[0030] Based on the special solvent properties of supercritical water, supercritical water oxidation has received widespread attention. The principle of SCWO reaction is to use supercritical water as a reaction medium to oxidize and decompose organic matter. The oxidants used are H2O2, O2, etc. In the SCWO process, since supercritical water is an excellent solvent for both organic matter and oxygen, and the amount of oxygen provided during the reaction is sufficient, because the reaction is in an oxygen-rich homogeneous phase, mass transfer and heat transfer will not be restricted by the presence of the phase interface. At the same time, the reaction temperature is as high as 500°C, which greatly improves the oxidation rate and oxidation capacity. It can even achieve a very high destruction rate for organic matter within a few seconds. The SCWO reaction is complete and thorough, and rapid oxidation is achieved for organic matter that is difficult to degrade naturally. In the SCWO reaction, the C and H elements of organic matter are completely oxidized into CO2 and H2O; organic nitrogen and inorganic nitrogen are converted into N2; Cl, ​​P, S and metal elements are converted into HCl, H2SO4, H3PO4 and salt precipitation. These salts can be selectively separated from the system under the conditions of pressure reduction and cooling to achieve complete oxidation degradation and green emissions.

[0031] Regarding the mechanism of supercritical water oxidation reaction, it is generally believed that it is a free radical reaction, just like wet oxidation. The oxidants used in the supercritical water oxidation process are mostly hydrogen peroxide or oxygen. Hydrogen peroxide and oxygen can be transformed into each other quickly in the supercritical water system to reach equilibrium. No matter which oxidant is added, the corresponding reaction mechanism is basically the same.

[0032] Based on the above principle, the utility model proposes a device for treating odor of distillation wastewater.

[0033] like Figure 1 As shown, a device for treating odor of distillation wastewater comprises a pretreatment device, a cooling device and a supercritical water oxidation device. The pretreatment device comprises a filter 1, the inlet of the filter 1 is connected to the distillation wastewater delivery pipeline 2, and the outlet of the filter 1 is connected to the cooling device through the filtered wastewater delivery pipeline 3. The cooling device comprises a cooling tank 4, the filtered wastewater delivery pipeline 3 is connected to the inlet of the cooling tank 4, and the outlet of the cooling tank 4 is connected to the inlet of the supercritical water oxidation device 6 through the cooling wastewater delivery pipeline 5. The supercritical water oxidation device 6 is also connected to an air supply pipeline 7, through which air is provided to the supercritical water oxidation device 6. An air compressor 8 is arranged on the air supply pipeline 7. The liquid outlet of the supercritical water oxidation device 6 is connected to a drainage pipeline 9, and a drainage pump 10 is also arranged on the drainage pipeline 9. The gas outlet of the supercritical water oxidation device 6 is connected to an exhaust pipeline 11, the exhaust pipeline 11 is connected to an exhaust pipe 12, and a fan 13 is arranged on the exhaust pipeline 11.

[0034] The utility model adopts a combination of pretreatment and supercritical oxidation to treat the odor of distillation wastewater, which can effectively remove the odor in the distillation wastewater, and the wastewater discharged through the liquid outlet of the supercritical water oxidation device has no obvious odor.

[0035] For raw materials with high content of corrosive substances in distilled water, a pretreatment section is added to separate and remove the corrosive substances in the raw materials, which is used to effectively reduce the corrosiveness of the raw materials to subsequent supercritical equipment. In addition, the corrosiveness increases sharply with the increase of temperature. The use of cold feeding method is an effective anti-corrosion measure. Therefore, the distilled water first passes through a filter to remove specific corrosive substances in the raw materials, and then passes through a cooling tank to use a cold feeding method to effectively reduce the corrosiveness of the raw materials to the equipment. After the distilled water is treated by the supercritical water oxidation device 6, the wastewater has no obvious odor.

[0036] The above-mentioned distillation wastewater delivery pipeline 2 is connected to the water outlet of the distillation tower.

[0037] The above-mentioned supercritical water oxidation device 6 includes a supercritical water oxidation device body, and a heating and temperature raising device is provided on the supercritical water oxidation device body. The supercritical water oxidation device 6 can be heated and heated by the heating and temperature raising device. From the specific treatment results, the wastewater is heated to 150°C in the supercritical water oxidation device for reaction, and the oxidized liquid after the reaction is completed is compared with the original water for odor, and the odor has no obvious change. The wastewater is heated to 200°C in the supercritical water oxidation device for reaction, and the oxidized liquid after the reaction is completed is compared with the original water for odor. The odor has improved, but the odor is still very heavy. The wastewater is heated to 260°C in the supercritical water oxidation device for reaction, and the oxidized liquid after the reaction is completed is compared with the original water for odor, and there is no obvious odor. According to the experimental results, when treating the wastewater, it is necessary to heat it to above 260°C, and the distillation wastewater is suitable for deodorization and deodorization treatment using a supercritical water oxidation device.

[0038] like Figure 2 As shown, the drainage pipe 9 is connected to the sewage treatment system 14. The wastewater treated by the supercritical water oxidation device has no obvious odor and can be further discharged into the sewage treatment system 14 for mixing with conventional sewage for centralized treatment.

[0039] like Figure 3 As shown, the filter 1 includes a filter housing 101, and a filter screen 102 and a packing layer 103 are arranged inside the filter housing 101, and the packing layer 103 is located above the filter screen 102. The filter can effectively remove corrosive substances such as acid in the distillation wastewater through the combination of the filter screen 102 and the packing layer 103, which increases the odor treatment effect and effectively reduces the corrosiveness of the raw materials to the subsequent supercritical water oxidation device 6.

[0040] like Figure 4As shown, the cooling tank 4 includes a tank body 401, and a water cooling chamber 402 is arranged outside the tank body 401. The top of the water cooling chamber 402 is connected to a cold water inlet 403, and the bottom of the water cooling chamber 402 is connected to a cold water outlet 404. The utility model adopts a water cooling method, so that the raw materials entering the supercritical water oxidation device 6 can be quickly cooled to the required temperature, effectively reducing the corrosiveness of the distillation wastewater to the subsequent supercritical water oxidation device 6, and can improve the odor treatment effect of the distillation wastewater.

[0041] The utility model treats distillation wastewater, and the wastewater treatment capacity is: 500t / d. The influent concentration is shown in Table 1 below.

[0042] Table 1

[0043] Serial number Test items Customer provides water inlet data Measured data 1 Wastewater treatment capacity / / 2 Appearance / Dispersed particles 3 color / Off-white 4 COD(mg / L) 20000-30000 17875 5 TOC(mg / L) / 4850 6 pH / 5.8 7 Water temperature (℃) / / 8 Organic ingredients Polyols containing C5-C8 / 9 Odor concentration 50000

[0044] The pH value was determined by the glass electrode method; TOC was determined by Shimadzu TOC-L tester; COD was determined by potassium dichromate method.

[0045] After the above wastewater is treated by the distillation wastewater odor treatment device of the utility model, the COD content is less than 150mg / L and the TOC content is less than 30mg / L, both of which are lower than the national standard. In addition, the wastewater has no obvious odor and meets the environmental protection treatment requirements.

[0046] The parts not mentioned in the above methods can be realized by adopting or drawing on existing technologies.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for treating odor of distillation wastewater, characterized in that: It includes a pretreatment device, a cooling device and a supercritical water oxidation device; the pretreatment device includes a filter, the inlet of the filter is connected to the distillation wastewater delivery pipeline, and the outlet of the filter is connected to the cooling device through the filtered wastewater delivery pipeline; The cooling device comprises a cooling tank, a filtered wastewater delivery pipeline is connected to the inlet of the cooling tank, and the outlet of the cooling tank is connected to the inlet of the supercritical water oxidation device through the cooling wastewater delivery pipeline; The supercritical water oxidation device is also connected to an air supply pipeline, on which an air compressor is arranged; The liquid outlet of the supercritical water oxidation device is connected to a drainage pipe, on which a drainage pump is also arranged; the gas outlet of the supercritical water oxidation device is connected to an exhaust pipe, which is connected to an exhaust pipe, on which a fan is arranged.

2. The device for treating odor of distillation wastewater according to claim 1, characterized in that: The distillation wastewater delivery pipeline is connected to the water outlet of the distillation tower.

3. The device for treating odor of distillation wastewater according to claim 1, characterized in that: The filter comprises a filter housing, a filter screen and a packing layer are arranged inside the filter housing, and the packing layer is located above the filter screen.

4. The device for treating odor of distillation wastewater according to claim 1, characterized in that: The cooling tank comprises a tank body, and a water cooling chamber is arranged on the outside of the tank body. The top of the water cooling chamber is connected to a cold water inlet, and the bottom of the water cooling chamber is connected to a cold water outlet.

5. The device for treating odor of distillation wastewater according to claim 1, characterized in that: The supercritical water oxidation device comprises a supercritical water oxidation device body, on which a heating and temperature-raising device is arranged.

6. The device for treating odor of distillation wastewater according to claim 1, characterized in that: The drainage pipe is connected to a sewage treatment system.

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