CN110540340A - Waste oil water oxidation technology and operation method - Google Patents
Waste oil water oxidation technology and operation method Download PDFInfo
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- CN110540340A CN110540340A CN201910762172.5A CN201910762172A CN110540340A CN 110540340 A CN110540340 A CN 110540340A CN 201910762172 A CN201910762172 A CN 201910762172A CN 110540340 A CN110540340 A CN 110540340A
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- waste oil
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a waste oil water oxidation technology and an operation method, which mainly comprises gas-liquid separation, flocculation separation, air flotation separation and terminal water treatment, wherein the gas-liquid separation is conveyed into gas-liquid separation equipment by a water pump and is carried out in the gas-liquid separation equipment; the flocculation separation adopts a reaction tank internally provided with a stirring and heating device, the stirring and heating device stirs and heats waste oil water or emulsion containing waste oil to the temperature of process indexes, proper amount of sulfuric acid is added under stirring to reduce the pH value of the emulsion to the range reached by the process indexes, aluminum sulfate solution is added according to proportion and stirred, and sodium hydroxide solution is slowly added. The invention has reasonable design, completely and effectively separates oil from water, can be directly discharged to a terminal water treatment process, can also be used for gas making circulating water and boiler dust removal, has high treatment efficiency and reduces the wastewater treatment cost; the waste oil is recycled, and the industrial production cost is reduced; and the emission reaches the standard, so that the water pollution is avoided.
Description
Technical Field
the invention relates to a waste oil water oxidation technology, in particular to a waste oil water oxidation technology and an operation method.
Background
The annual output of waste engine oil is huge, and the waste engine oil can be discharged to a waste water treatment plant along with industrial waste water, at present, the waste oil water discharged by a plurality of medium-sized waste water treatment plants still adopt oil separation tanks of 20 century and 80 th era, floating oil is separated by natural sedimentation, in recent years, because of the continuous change of the process of each factory and the wide use of the additive in the oil, the appearance of the waste oil discharged by the compressor is a faint yellow milk-like emulsion, and the water sample is taken and sent to a related scientific research institution for analysis to draw the conclusion that most of the lubricating oil and water discharged by the driving equipment comes from the internal lubrication of the piston type driving machine, the lubricating oil and the compression medium are contacted with each other, and as the alkali liquor is used as the desulfurizing liquid in the semi-water gas desulfurization, these substances also act as emulsifier, and the lubricating oil and the saturated water in the gas form a stable emulsified state through the processes of high-speed reciprocating motion, pressurization, temperature rise, temperature drop and the like.
in the existing treatment technology, the oil-water mixed liquid is naturally kept still for a long time and cannot be layered, after the mixed liquid is placed for about 20 days, trace floating oil appears on the upper layer, and oily sludge-like substances appear on the lower layer, but the middle part still becomes milk-like, so that the treatment efficiency is very low; even if heating is adopted, emulsion can not be separated, if waste oil is forcibly discharged to a terminal water device, a layer of extremely thin oil film is immediately generated on the water surface, and the oil film can lead bacterial sludge for water treatment to die quickly, thereby greatly increasing the cost of wastewater treatment; the oil stains can not be thoroughly treated, the water discharge amount per day reaches dozens of tons or even hundreds of tons, and the pollution to the water body is serious; poor recycling rate of the waste oil and increased industrial production cost.
Disclosure of Invention
The invention aims to provide a waste oil water oxidation technology and an operation method, which aim to solve the problems in the background technology.
in order to achieve the purpose, the invention provides the following technical scheme:
A waste oil water oxidation technology and an operation method thereof mainly comprise gas-liquid separation, flocculation separation, air flotation separation and terminal water treatment, wherein the gas-liquid separation is conveyed into gas-liquid separation equipment by a water pump and is carried out in the gas-liquid separation equipment;
the flocculation separation adopts a reaction tank internally provided with a stirring and heating device, the stirring and heating device stirs and heats waste oil water or emulsion containing the waste oil to the temperature of the process index, a proper amount of sulfuric acid is added under stirring to reduce the pH value of the emulsion to the range reached by the process index, aluminum sulfate solution is added according to the proportion and stirred, sodium hydroxide solution is slowly added, and the pH value of the solution to be treated is adjusted;
the air floatation separation adopts air blowing equipment matched with the first oil separation tank to blow air into the bottom of the tank to form tiny air bubbles, which is helpful for leading the oil-containing flocculate to rise to the surface and achieving the separation of the oil-containing flocculate and the water phase;
The water body at the lower part of the first oil separation tank flows to a second oil separation tank through a conduction pipe by means of hydrostatic pressure to be stood, the floating oil separated at the upper part is conveyed into a reaction tank with a stirring and heating device arranged inside through a movable oil suction machine, and the wastewater at the lower part enters a third oil separation tank through the conduction pipe;
And adding polyaluminium sulfate and anion compound demulsifier into the third oil separation tank, allowing the water body at the lower part of the oil separation tank to flow to a fourth tank through a conducting pipe by virtue of hydrostatic pressure, and performing terminal water treatment in the fourth tank, wherein the terminal water treatment adopts a biomembrane sewage treatment technology.
As a further scheme of the invention: the reaction tank with stirring and heating device heats the demulsified lubricating waste oil from the second oil separation tank and the third oil separation tank, concentrated sulfuric acid is added successively at intervals with less component, after the acid is added to reach the gene conversion standard of oil hydrocarbon, the stirring is continued to be carried out for static separation, neutral water is added when the stirring is close to the static separation, the stirring is continued to be carried out for static separation after the stirring is carried out for the static separation, and the thorough slag separation and clear oil are taken as the reference.
As a still further scheme of the invention: heating the waste oil, adding clear water, continuously rotating to static component, discharging after static component is converted, and determining the discharge according to the separation speed.
as a still further scheme of the invention: after standing, the oil product is filtered by a vacuum oil filter, and various additives are added to ensure that the regenerated oil product reaches the national quality standard of purchased new oil and is implemented according to the GB 12691-92 and GB3141 standards.
Compared with the prior art, the invention has the beneficial effects that:
the invention has reasonable design, completely and effectively separates oil from water, can be directly discharged to a terminal water treatment process, can also be used for gas making circulating water and boiler dust removal, has high treatment efficiency and reduces the wastewater treatment cost; the waste oil is recycled, and the industrial production cost is reduced; and the emission reaches the standard, so that the water pollution is avoided.
Drawings
FIG. 1 is a schematic flow chart of waste oil water oxidation technology and operation method.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the embodiment of the present invention, a waste oil water oxidation technology and an operation method mainly include gas-liquid separation, flocculation separation, air flotation separation and terminal water treatment, wherein the gas-liquid separation is delivered to a gas-liquid separation device by a water pump, and gas-liquid separation is performed in the gas-liquid separation device;
The flocculation separation adopts a reaction tank internally provided with a stirring and heating device, the stirring and heating device stirs and heats waste oil water or emulsion containing the waste oil to the temperature of process indexes, a proper amount of sulfuric acid is added under stirring to reduce the pH value of the emulsion to the range reached by the process indexes, an aluminum sulfate solution with the concentration of 50 percent is added according to the proportion, after stirring for 5min, a sodium hydroxide solution with the concentration of 50 percent is slowly added, the pH value of the solution to be treated is adjusted to 4.5-9.0, and the adding amount enables flocs produced by the emulsion and the aluminum sulfate sodium hydroxide to be optimized;
the air floatation separation adopts air blowing equipment matched with the first oil separation tank to blow air into the bottom of the tank to form tiny air bubbles, which is helpful for leading the oil-containing flocculate to rise to the surface and achieving the separation of the oil-containing flocculate and the water phase;
The water body at the lower part of the first oil separation tank flows to a second oil separation tank through a conduction pipe by means of hydrostatic pressure to be stood, the floating oil separated at the upper part is conveyed into a reaction tank with a stirring and heating device arranged inside through a movable oil suction machine, and the wastewater at the lower part enters a third oil separation tank through the conduction pipe;
adding polyaluminium sulfate and anion compound demulsifier into the third oil separation tank, wherein 500 mL of polyaluminium sulfate (with the concentration of 10%) and 500 mL of anion PAM (with the concentration of 0.1%) are respectively added into each ton of water, the water body at the lower part of the oil separation tank flows to a fourth tank through a conducting pipe by virtue of hydrostatic pressure, and the fourth tank is used for carrying out terminal water treatment, wherein the terminal water treatment adopts a biomembrane sewage treatment technology;
heating the demulsified lubricating waste oil sent from the second oil separation tank and the third oil separation tank to 60 ℃ by a reaction tank with a stirring and heating device, adding concentrated sulfuric acid with 7 percent of total oil mass at small component, successively and slightly at intervals, adding the concentrated sulfuric acid within 20 min, continuing to stir in air for 35 min for static transfer after the acid reaches the oil-hydrocarbon genetic transformation standard, adding 2.5 percent of neutral water when the static transfer is approached, continuing to stir slightly for 5min, then statically separating slag, discharging slag for the first time after the static transfer for 35 min, determining the slag-gathering separation condition on site at the later stage, wherein the total control time of the concentrated acid oxidation link is 15-25 h, the slag separation is thorough, and the oil is clear;
Raising the temperature of the waste oil to 95 ℃, using 35 ℃ water, controlling the water adding amount to be 9-14% of the total oil amount, gradually adding the water within 15min, continuously rotating for 30 min to convert static minute, discharging the oil after 5min after the static minute, determining the separation speed at the later stage, wherein the acid oil washing frequency is 2-3 times generally, and the total time of the washing link is 23-30 h;
After standing, the oil product is filtered by a vacuum oil filter, and various additives are added to ensure that the regenerated oil product reaches the national quality standard of outsourcing new oil and is implemented according to the GB 12691-92 and GB3141 standards by taking the impurity content of the oil product less than 0.007%, the oil color of the oil product is clearly transparent and is 100% measured by a 200mL cup and the golden yellow light blue fluorescent state as the standard.
the working principle of the invention is as follows:
the invention relates to a waste oil water oxidation technology and an operation method, and the existing demulsification method comprises the following steps: by adopting an acid-alum method, the process and equipment are simpler, the effect is stable, the efficiency is low, the effluent oil content is higher, and the COD content of the effluent is higher; adding aluminum salt and ferric salt with strong coagulation effect, generally combining coagulation sedimentation or air floatation process, but forming floccule in the wastewater treatment process, resulting in reduction of oil recovery rate; the polymer method is mainly characterized in that high-price organic polymers are added, the organic polymers generally mainly have the adsorption and bridging effects, and the method is suitable for emulsified oil wastewater which is difficult to demulsify;
compared with the currently adopted demulsification method, the waste oil emulsified by the technology is completely and effectively separated from water, the COD content in the waste water reaches 360 mg/L, the waste oil can be directly discharged to a terminal water treatment process, and can also be used as gas making circulating water and boiler dust removal, the waste oil is recycled, the waste oil recovery cost can be increased when the waste oil is sold for sale, energy is saved, consumption is reduced, and water body pollution is avoided;
The main equipment comprises 1 gas-liquid separation equipment, 2 reaction tanks with built-in stirring and heating devices, 1 sulfuric acid tank and 2 additive storage tanks, wherein the sulfuric acid tank is formed by welding steel plates, is resistant to pressure of more than 0.6 MPa and needs to be buried underground, and comprises 1 underground oil separation tank, a reinforced concrete structure, 2 vacuum oil filters, 2 movable oil suction machines and 2 additive storage tanks.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A waste oil water oxidation technology and operation method, mainly include gas-liquid separation, flocculation separation, air flotation separation and terminal water treatment, characterized by that, the said gas-liquid separation adopts the water pump to transport into gas-liquid separation equipment, carry on the gas-liquid separation in the gas-liquid separation equipment;
The flocculation separation adopts a reaction tank internally provided with a stirring and heating device, the stirring and heating device stirs and heats waste oil water or emulsion containing the waste oil to the temperature of process indexes, a proper amount of sulfuric acid is added under stirring to reduce the pH value of the emulsion to the range reached by the process indexes, a sodium hydroxide solution is added to adjust the pH value of the solution to be treated to 4.5-9.0, and the addition amount enables flocs produced by the emulsion and the sodium aluminum sulfate and the sodium hydroxide to be optimized;
the air floatation separation adopts air blowing equipment matched with the first oil separation tank to blow air into the bottom of the tank to form tiny air bubbles, which is helpful for leading the oil-containing flocculate to rise to the surface and achieving the separation of the oil-containing flocculate and the water phase;
the water body at the lower part of the first oil separation tank flows to a second oil separation tank through a conduction pipe by means of hydrostatic pressure to be stood, the floating oil separated at the upper part is conveyed into a reaction tank with a stirring and heating device arranged inside through a movable oil suction machine, and the wastewater at the lower part enters a third oil separation tank through the conduction pipe;
And adding 600 mL of polyaluminium sulfate and 600 mL of anionic PAM into each ton of water in the third oil separation tank, allowing the water body at the lower part of the oil separation tank to flow to a fourth tank through a conducting pipe by virtue of hydrostatic pressure, and performing terminal water treatment in the fourth tank by adopting a biomembrane sewage treatment technology.
2. the waste oil water oxidation technology and the operation method of claim 1, wherein the reaction tank with the built-in stirring and heating device heats the demulsified lubricating waste oil from the second oil separation tank and the third oil separation tank to 60 ℃, concentrated sulfuric acid with less component, which is gradually and slightly added at intervals and has a total oil content of 7% is added within 20 min, after the acid addition reaches the oil-hydrocarbon genetic transformation standard, the stirring is continued for 35 min to perform static separation, 2.5% neutral water is added when the static separation is approached, the stirring is continued for 5min to perform static separation, the first slag removal is performed 35 min later, the field determination is performed according to the separation condition of the slag accumulation, the total control time of the concentrated acid oxidation link is 15-25 h, the slag separation is thorough, and the oil is clear.
3. the waste oil water oxidation technology and the operation method according to claim 1, wherein the temperature of the waste oil is raised to 95 ℃ by the reaction tank with the built-in stirring and heating device, 35 ℃ water is used, the water addition amount is controlled to be 9% -14% of the total oil amount, the water addition is finished gradually within 15min, the waste oil is continuously rotated for 30 min to rotate for static separation, the waste oil is discharged once after 5min after the static separation, the later period is determined according to the separation speed, the acid oil washing frequency is usually 2-3 times, and the total time of the washing process is 23-30 h.
4. the waste oil water oxidation technology and the operation method of the claim 1, wherein after the reaction tank with the built-in stirring and heating device is placed still, the oil product is conveyed to a vacuum oil filter for filtration, and based on the condition that the impurity of the oil filter is less than 0.007%, the color of the oil is measured by a 200mL cup and is clear and transparent 100%, and the golden yellow light blue fluorescent state is taken as a reference, various additives are added to enable the regenerated oil product to reach the national quality standard of purchased new oil, and the operation is carried out according to the GB 12691-92 and GB3141 standards.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910762172.5A CN110540340A (en) | 2019-08-19 | 2019-08-19 | Waste oil water oxidation technology and operation method |
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| CN201910762172.5A CN110540340A (en) | 2019-08-19 | 2019-08-19 | Waste oil water oxidation technology and operation method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120103914A1 (en) * | 2010-06-24 | 2012-05-03 | Gang Yuan | Centralized Sump Oil and Acid Oil treatment process and System |
| CN108911260A (en) * | 2018-08-09 | 2018-11-30 | 山西太钢不锈钢股份有限公司 | A kind of waste emulsified mixture treatment process |
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- 2019-08-19 CN CN201910762172.5A patent/CN110540340A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120103914A1 (en) * | 2010-06-24 | 2012-05-03 | Gang Yuan | Centralized Sump Oil and Acid Oil treatment process and System |
| CN108911260A (en) * | 2018-08-09 | 2018-11-30 | 山西太钢不锈钢股份有限公司 | A kind of waste emulsified mixture treatment process |
Non-Patent Citations (1)
| Title |
|---|
| 张建立: "浅谈压缩机乳化废油水的再生处理方法", 《河南化工》 * |
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Application publication date: 20191206 |