CN217398655U - Innocent treatment device of high alkali organic waste liquid - Google Patents
Innocent treatment device of high alkali organic waste liquid Download PDFInfo
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- CN217398655U CN217398655U CN202221687317.3U CN202221687317U CN217398655U CN 217398655 U CN217398655 U CN 217398655U CN 202221687317 U CN202221687317 U CN 202221687317U CN 217398655 U CN217398655 U CN 217398655U
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Abstract
The utility model relates to a innocent treatment device of organic waste liquid of high alkali of chemical industry, including pH regulating unit, the little electrolysis unit of iron carbon, ozone sprays catalytic oxidation unit, electro-catalysis degree of depth oxidation unit and exhaust-gas purification unit, the waste liquid carries out the pH regulation through pH regulating unit, the little nanometer aeration coupling iron carbon of the little electrolysis unit of iron carbon of recycling air is little electrolysis, ozone sprays catalytic oxidation unit's ozone and sprays catalytic oxidation and electro-catalysis degree of depth oxidation unit's electrochemistry degree of depth oxidation combination processing, organic matters such as thioether, ketone are in order to decompose into CO2 and H2O2 in the organic waste liquid of high alkali, make go out water disposable processing reach the one-level standard that "comprehensive emission standard GB-2 of sewage" 1996 "COD < 100 mg/L. Compared with the traditional incineration method, wet oxidation method and the like, the method has the advantages of low equipment investment cost, good treatment effect, simple operation and operation, high safety and the like.
Description
Technical Field
The utility model relates to a processing technology field of organic waste liquid of high alkali, concretely relates to innocent treatment device that produces organic waste liquid of high alkali such as coal system alkene technology, petrochemical industry technology and petroleum refining technology.
Background
In the novel coal chemical industry process, a large amount of acid gases such as carbon dioxide and the like can be generated in the olefin production of different raw materials, and the acid gases have serious influence on the rear-end process, so that the acid gases are mainly treated by adopting a sodium hydroxide solution alkali washing mode at present. In the alkali washing process, high-alkali organic waste liquid mainly comprising sodium carbonate, sodium bicarbonate and sodium hydroxide is formed, and cross-linking polymerization or condensation reaction of ketone and aldehyde under an alkaline condition can be initiated by light hydrocarbon or diolefin free radicals to form the extremely-difficult-to-degrade butter. The butter in the high-alkali organic waste liquid is an organic oxygen-containing mixture mainly composed of aromatic compounds and aldehyde ketone compounds, and the existence of the organic oxygen-containing mixture can be unfavorable for the normal operation of the alkaline washing tower and reduce the alkaline washing effect. Meanwhile, the grease is easy to polymerize and agglomerate after being accumulated to a certain degree, and can block the filler and the distributor in the tower, so that the whole tower equipment can be blocked. The density of oil in the high-alkali organic waste liquid is relatively close to that of water, so that the oil-water separation difficulty is high, the biodegradability is poor (BOD5/CODcr is 0.15), and the high-alkali organic waste liquid has serious impact on the subsequent wastewater treatment process. The common advanced oxidation mode of butter is difficult to damage the carbon chain structure of butter, so that the important difficulty in treating high-alkali organic waste liquid mainly lies in developing a process method which has low investment cost and simple operation and can effectively degrade organic matters such as aldehyde, ketone, butter and the like.
At present, the treatment of domestic organic waste liquid mainly comprises technologies such as a chlorine oxidation method, an incineration method, a supercritical oxidation method, a wet oxidation method, a recycling method, an advanced oxidation method and the like, wherein the wet oxidation process technology is mature and widely applied, but has the defects of harsh reaction conditions, high equipment requirement, high operation cost and the like, and is introduced and used in only a few large chemical enterprises in China; the maturity of the supercritical oxidation technology is relatively low, the gas consumption of the chlorine oxidation method is high, the operation cost is high, and toxic substances such as nitrogen oxides, dioxin and the like are easily generated due to equipment corrosion in the burning method. The advanced oxidation method is used as a new technology for treating high-difficulty organic wastewater, decomposes organic matters by generating strong oxidizing intermediates such as hydroxyl radicals and the like, and is widely applied to different industries at present.
CN2013104796. X discloses a method for treating sulfur-containing waste alkali liquor, which comprises the steps of carbonizing sulfur-containing waste alkali liquor generated in a desulfurization process by using CO2 in sulfur-containing tail gas generated by an acid water gas device of an oil refinery, converting NaOH, Na2S and NaHS in the sulfur-containing waste alkali liquor into NaHCO3, Na2CO3 and H2S, and controlling the sulfide concentration in the carbonized liquid to be below 10mg/L, but the application conditions are harsh.
CN201010205763.1 discloses a method for treating waste alkali liquor by high-temperature wet oxidation, which comprises the steps of keeping the liquid phase of the waste alkali liquor at 220-260 ℃ and oxidizing inorganic sulfides and organic matters in the waste alkali liquor by using oxygen in the air, wherein the desulfurization rate reaches 100%, the COD removal rate reaches 75-85%, but the salt content of effluent is higher, and the COD content still reaches about 20000mg/L, so that the effluent cannot be directly discharged into a biochemical system for treatment.
CN201310537921.7 discloses a method for treating ethylene waste lye, which utilizes wet air oxidation-micro-electrolysis reaction-adsorption precipitation-biochemical treatment (SBR) to treat ethylene high-alkali organic waste liquor, the removal rate of COD can reach more than 90 percent, and S 2- The removal rate can reach more than 99.9 percent, the recovery rate of sodium salt is more than 95 percent, but the investment and operation cost and the operation condition are harsh.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem of the prior art in the organic waste liquid of processing high alkalinity, the utility model provides a pair of innocent treatment device of organic waste liquid of high alkalinity.
The specific technical scheme is as follows:
the utility model provides a innocent treatment device of high alkali organic waste liquid, includes pH regulating unit, indisputable carbon micro-electrolysis unit, ozone spray catalytic oxidation unit, electro-catalysis degree of depth oxidation unit and exhaust purification unit to connect gradually.
The pH adjusting unit is a three-stage adjusting tank which is sequentially a 1# adjusting tank, a 2# adjusting tank and a 3# adjusting tank, and is respectively provided with a 1# stirrer, a 2# stirrer and a 3# stirrer; a2 # pH on-line instrument and a 3# pH on-line instrument are also respectively arranged on the 2# regulating tank and the 3# regulating tank.
The iron-carbon micro-electrolysis unit comprises an iron-carbon catalytic tower, a water inlet of the iron-carbon micro-electrolysis unit is provided with a pipeline mixer which is connected with the pH adjusting unit, and the pipeline mixer is also connected with a hydrogen peroxide dosing device; a microporous aeration disc is arranged in the iron-carbon catalytic tower and is connected with an air compressor; the water outlet of the iron-carbon catalytic tower is connected with an iron-carbon effluent regulating tank.
The ozone spraying catalytic oxidation unit comprises an ozone spraying catalytic tower connected with the iron-carbon micro-electrolysis unit, and the bottom of the ozone spraying catalytic oxidation unit is connected with an ozone generator.
The high-alkali organic waste liquid redistributor is arranged in the ozone spraying catalytic tower, so that the waste liquid is prevented from directly flowing away along the periphery of the wall of the ozone spraying catalytic tower to influence the treatment efficiency.
The electrocatalysis deep oxidation unit comprises an electrocatalysis adjusting tank and is connected with an electrode group and a power supply; the water outlet of the ozone spraying catalytic oxidation unit is connected with an electro-catalytic regulating tank through a cartridge filter.
The waste gas purification unit comprises an ozone destructor, a waste gas purification device and an induced draft fan which are connected in sequence;
the ozone destructor is respectively connected with the pH adjusting unit, the iron-carbon micro-electrolysis unit, the ozone spraying catalytic oxidation unit and the electrocatalysis deep oxidation unit.
The pH adjusting unit is controlled by adopting a three-stage gradient adjusting mode, the pH of the 1# adjusting tank is controlled to be between 6 and 7 by calculating the theoretical adding amount of sulfuric acid or hydrochloric acid in the pH range of the raw water of the high-alkali organic waste liquid, and then the raw water passes through the 2# adjusting tank and the 3# adjusting tank respectively, respectively adding sulfuric acid or salt through monitoring of a 2# pH online instrument and a 3# pH online instrument, respectively controlling the pH value to be between 4 and 5 and between 3 and 3.5, finally entering a pipeline mixer through a 1# lift pump connected with a 3# regulating tank, hydrogen peroxide is added through a dosing device, water enters from the bottom of the iron-carbon catalytic tower after being mixed with the high-alkali organic waste liquid after the pH is adjusted through a pipeline mixer, air is pumped by an air compressor and is released through a micropore aeration disc to generate micro-nano bubbles, carrying out ring-opening chain-breaking oxidation on long carbon chain and benzene ring organic matters in the high-alkali organic waste liquid under the catalysis of an iron-carbon filler in an iron-carbon catalytic tower; the treated wastewater automatically flows into an iron-carbon effluent regulating tank, then enters from the upper part of an ozone spray catalytic tower through a 2# lift pump connected with the regulating tank, two-stage alumina type catalysts are filled in the ozone spray catalytic tower, and a high-alkali organic waste liquid redistributor is arranged in the middle layer; the ozone generator generates ozone, the ozone enters from the bottom of the ozone spraying catalytic tower and is in countercurrent contact with the sprayed high-alkali organic waste liquid on the surface of the catalyst, so that the organic matters in the high-alkali organic waste liquid are fully degraded, and most of the organic matters in the high-alkali organic waste liquid are oxidized and decomposed into carbon dioxide and water.
The waste liquid flows out from the bottom of the ozone spraying catalytic tower, enters an electro-catalytic regulating tank after being filtered by a cartridge filter to remove most suspended matters, and is subjected to electro-catalytic treatment under the action of an electrode group, and finally the COD content of the waste liquid is treated to the primary standard of the Integrated wastewater discharge Standard GB 8978 + 1996 which is less than or equal to 100 mg/L;
acid mist, organic waste gas, ozone waste gas, carbon dioxide and a small amount of volatile organic waste gas generated by the reaction in the pH adjusting unit, the iron-carbon catalytic tower, the ozone spraying catalytic tower and the electro-catalysis adjusting tank respectively enter the ozone destructor through pipeline negative pressure, and are led out from the draught fan after reaching the standard through activated carbon adsorption treatment in the waste gas purification device.
The utility model discloses to ethylene high-alkali organic waste liquid quality of water and pollutant characteristics, provided pH regulation-little electrolytic oxidation-ozone advanced oxidation-filter-electrocatalysis degree of depth oxidation combination processing, realize little electrolytic hydrogenation reduction, ozone spray catalytic oxidation, the suspended solid filters, electrocatalysis degree of depth oxidation, through combination processing, effectively avoid the little electrolysis of iron carbon and the processing cycle overlength that ozone oxidation technology exists in handling high COD waste water to and the too high problem of single electrocatalysis technology treatment cost.
The anode substrate of the electrode group of the electrocatalytic deep oxidation unit is designed by adopting a porous titanium material, so that the specific surface area is greatly increased compared with that of a traditional two-dimensional electrode, the active sites of electrocatalytic reaction are increased, and the electrocatalytic reaction efficiency is improved.
Ozone sprays oxidation unit and produces excessive ozone waste gas and carries out oxidation treatment through mixing reuse to organic component in the waste gas, adsorbs discharge to reach standard after ozone destructor eliminates meeting, effectively avoids ozone to spray the lower problem of ozone component utilization ratio among the absorption oxidation technology, has improved the active carbon simultaneously and has changed the cycle.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
Detailed Description
The technology of the present invention is further illustrated by the following specific examples. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the invention.
Example 1
The utility model provides a innocent treatment device of high-alkali organic waste liquid, includes pH adjusting unit, indisputable carbon micro-electrolysis unit, ozone spray catalytic oxidation unit, electro-catalysis degree of depth oxidation unit and exhaust purification unit to connect gradually.
The pH adjusting unit is a three-stage adjusting tank 1, is sequentially communicated with a No. 1 adjusting tank, a No. 2 adjusting tank and a No. 3 adjusting tank, and is respectively provided with a No. 1 stirrer 2, a No. 2 stirrer 3 and a No. 3 stirrer 4; a2 # pH on-line instrument 5 and a 3# pH on-line instrument 6 are also respectively installed on the 2# regulating tank and the 3# regulating tank.
The iron-carbon micro-electrolysis unit comprises an iron-carbon catalytic tower 10, a water inlet of the iron-carbon micro-electrolysis unit is provided with a pipeline mixer 9 connected with a pH adjusting unit, the pipeline mixer 9 is also connected with a hydrogen peroxide dosing device 8, and the addition amount of the hydrogen peroxide is 0.5-1.5% of the treatment amount of the high-alkali organic waste liquid; a micropore aeration disc 11 is arranged in the iron-carbon catalytic tower 10 and is connected with an air compressor 12, an air source is adopted for micropore aeration, and the liquid-gas ratio of the high-alkali organic waste liquid to air is 1-6; the water outlet of the iron-carbon catalytic tower 10 is connected with an iron-carbon effluent regulating tank 13.
The ozone spraying catalytic oxidation unit comprises an ozone spraying catalytic tower 15 connected with the iron-carbon micro-electrolysis unit, a high-alkali organic waste liquid redistributor 16 is arranged in the ozone spraying catalytic tower, the bottom of the ozone spraying catalytic oxidation unit is connected with an ozone generator 17, the concentration of the generated ozone is 200g/L, and the liquid-gas ratio of the high-alkali organic waste liquid to the ozone is 0.25-1; the joint of the ozone generator 17 and the ozone spraying catalytic tower 15 is provided with a single check valve which can prevent the high-alkali organic waste liquid from entering the ozone generator 17.
The electrocatalysis deep oxidation unit comprises an electrocatalysis adjusting tank 20, and is provided with an electrode group 21 and a power supply 22; the effluent of the ozone spraying catalytic oxidation unit is connected with an electro-catalytic regulating tank 20 through a cartridge filter 18, and the cartridge filter 18 adopts a bag filter; electrode group 21 cathodeThe electrode is made of one or more of titanium, stainless steel, carbon, brass, lanthanum tungsten and the like, the anode of the electrode group 21 is made of a porous titanium material as a substrate, powder suspension of one or more oxides of ruthenium iridium, ruthenium iridium platinum and iridium tantalum is subjected to MHz ultrasonic mixing and then is deposited in an inert atmosphere to prepare the electrode, and the thickness of the prepared coating is 3-5 mu m; the electrode group 21 adopts the over-flow type circulation treatment, the distance between the electrode groups is 0.5cm, the anode current density is 45-60 mA/cm 2 。
The waste gas purification unit comprises an ozone destructor 24, a waste gas purification device 25 and an induced draft fan 26 which are connected in sequence;
the ozone destructor 24 is respectively connected with the pH adjusting unit, the iron-carbon micro-electrolysis unit, the ozone spraying catalytic oxidation unit and the electro-catalytic deep oxidation unit.
The pH adjusting unit is controlled by adopting a three-stage gradient adjusting mode, the pH of the 1# adjusting tank is controlled to be 6-7 by calculating the theoretical adding amount of sulfuric acid or hydrochloric acid in the pH range of raw water of the high-alkali organic waste liquid, the raw water passes through the 2# adjusting tank and the 3# adjusting tank respectively, the sulfuric acid with the concentration of 1% -5% or the hydrochloric acid with the concentration of 5% -10% is added respectively through the monitoring of the 2# pH on-line instrument 5 and the 3# pH on-line instrument 6, the pH is controlled to be 4-5 and 3-3.5 respectively, finally the raw water enters the pipeline mixer 9 through the 1# lifting pump 7 connected with the 3# adjusting tank, hydrogen peroxide is added through the medicine adding device 8, the raw water enters the bottom of the iron-carbon catalytic tower 10 after being mixed with the high-alkali organic waste liquid after the pH adjustment through the pipeline mixer 9, air is pumped by the air compressor 12 and is released through the microporous aeration disc 11 to generate micro-nano bubbles, and long carbon chains in the high-alkali organic waste liquid under the catalytic action of the iron-carbon filler in the iron-carbon catalytic tower 10, Carrying out ring-opening chain-breaking oxidation on benzene ring organic matters; the treated wastewater automatically flows into an iron-carbon effluent regulating tank 13, then enters from the upper part of an ozone spray catalytic tower 15 through a 2# lifting pump 14 connected with the regulating tank, the ozone spray catalytic tower 15 is filled with a two-stage alumina type catalyst, and the middle layer is a high-alkali organic waste liquid redistributor 16; the ozone generator 17 generates ozone, enters from the bottom of the ozone spraying catalytic tower 15, and is in countercurrent contact with the sprayed high-alkali organic waste liquid on the surface of the catalyst, so that the organic matters in the high-alkali organic waste liquid are fully degraded, and most organic matters in the high-alkali organic waste liquid are oxidized and decomposed into carbon dioxide and water.
The waste liquid flows out from the bottom of the ozone spraying catalytic tower 15, enters the electro-catalysis regulating tank 20 after being filtered by the cartridge filter 18 to remove most suspended matters, and is subjected to electro-catalysis treatment under the electrode action of the electrode group 21, and finally the COD content of the waste liquid is treated to be less than or equal to 100mg/L in the first-level standard of the Integrated wastewater discharge Standard GB 8978 + 1996 and is discharged through the 3# lift pump 23.
Acid mist, organic waste gas, ozone waste gas and carbon dioxide, a small amount of volatile organic waste gas that the reaction respectively produced in pH adjusting unit, iron carbon catalytic tower, ozone spray catalytic tower and the electro-catalysis adjusting tank all get into ozone destructor 24 through the pipeline, after active carbon adsorption treatment up to standard in exhaust gas purification device 25, draw the emission from the draught fan.
Application example 2:
DMTO of certain coal chemical industry&The pH value of the high-alkali organic waste liquid generated by the process of preparing ethylene from methanol in a PP plant is 12-13, the COD is 9800mg/L, and the TDS is 35-46 mg/L. Adjusting the pH value to 3.0-3.5 by adopting hydrochloric acid, introducing the high-alkali organic waste liquid into a micro-electrolysis reaction unit, setting the gas-liquid ratio to be 2:1, and setting the treatment capacity to be 1.5m 3 The aeration mode is air micro-nano aeration, the adding amount of hydrogen peroxide is 1.0%, the retention time is 90min, and the COD of the iron-carbon effluent is degraded to 5000-6000 mg/L; the micro-electrolysis effluent enters an ozone spraying advanced oxidation unit, the concentration of ozone is set to be 200g/L, the dosage of an ozone catalyst is 50kg/m 3 H, liquid-gas ratio of 0.5L/m 3 The retention time is 45min, and the COD content is degraded to 2000-3000 mg/L; ozone spraying advanced oxidation effluent enters an electro-catalytic deep oxidation unit, a titanium substrate DSA electrode is adopted as an anode of an electrode group, a titanium electrode is adopted as a cathode, and the current density is set to be 50mA/cm 2 The area of the anode is 1.5m 2 The effective retention time is 60min, and the COD can be degraded to be within 100 mg/L.
Finally, it should be noted that: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a innocent treatment device of high-alkali organic waste liquid which is characterized in that, includes pH adjusting unit, indisputable carbon little electrolysis unit, ozone spray catalytic oxidation unit, electro-catalysis degree of depth oxidation unit and exhaust purification unit to connect gradually.
2. The apparatus for detoxifying a high-alkali organic waste liquid according to claim 1, wherein the pH adjusting means is a three-stage adjustment tank comprising a 1# adjustment tank, a 2# adjustment tank, and a 3# adjustment tank, and is equipped with a 1# stirrer, a 2# stirrer, and a 3# stirrer, respectively; a2 # pH on-line instrument and a 3# pH on-line instrument are also respectively arranged on the 2# regulating tank and the 3# regulating tank.
3. The device for the harmless treatment of the high-alkali organic waste liquid according to claim 1, wherein the iron-carbon micro-electrolysis unit comprises an iron-carbon catalytic tower, a water inlet of the iron-carbon micro-electrolysis unit is provided with a pipeline mixer connected with a pH adjusting unit, and the pipeline mixer is further connected with a hydrogen peroxide dosing device; a microporous aeration disc is arranged in the iron-carbon catalytic tower and is connected with an air compressor; the water outlet of the iron-carbon catalytic tower is connected with an iron-carbon effluent regulating tank.
4. The apparatus for harmless treatment of high alkali organic waste liquid according to claim 1, wherein the ozone spraying catalytic oxidation unit comprises an ozone spraying catalytic tower connected with the iron-carbon micro-electrolysis unit, and the bottom of the ozone spraying catalytic tower is connected with an ozone generator.
5. The apparatus for harmless treatment of high alkali organic waste liquid according to claim 4, wherein a redistributor for high alkali organic waste liquid is provided inside the ozone spraying catalytic tower.
6. The apparatus for harmless treatment of high alkali organic waste liquid according to claim 1, wherein the electrocatalytic deep oxidation unit comprises an electrocatalytic regulation tank, and is connected with an electrode group and a power supply; the water outlet of the ozone spraying catalytic oxidation unit is connected with an electro-catalytic regulating tank through a cartridge filter.
7. The apparatus for harmless treatment of high alkali organic waste liquid according to claim 1, wherein the exhaust gas purification unit comprises an ozone destructor, an exhaust gas purification apparatus, and an induced draft fan, which are connected in sequence;
the ozone destructor is respectively connected with the pH adjusting unit, the iron-carbon micro-electrolysis unit, the ozone spraying catalytic oxidation unit and the electro-catalytic deep oxidation unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221687317.3U CN217398655U (en) | 2022-07-01 | 2022-07-01 | Innocent treatment device of high alkali organic waste liquid |
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| CN202221687317.3U CN217398655U (en) | 2022-07-01 | 2022-07-01 | Innocent treatment device of high alkali organic waste liquid |
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