CN215559638U - Harmless treatment device for high-salt organic wastewater containing sodium phenolate - Google Patents
Harmless treatment device for high-salt organic wastewater containing sodium phenolate Download PDFInfo
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Abstract
The utility model discloses a harmless treatment device for high-salt organic wastewater containing sodium phenolate, which comprises: the system comprises an acid adjusting reactor, an evaporative crystallization device, a microwave pretreatment device, a microwave pyrolysis system and a refined salt system; wherein: the upper part of the acid regulation reactor is provided with a feed inlet and a first water outlet, and the lower part of the acid regulation reactor is provided with a second water outlet; the first water outlet is connected with a water inlet of the evaporative crystallization device; the second water outlet is connected with the water inlet of the microwave pretreatment device; the discharge hole of the evaporative crystallization device and the discharge hole of the microwave pretreatment device are both connected with the feed inlet of the microwave pyrolysis system; the discharge hole of the microwave pyrolysis system is connected with the feed inlet of the refined salt system. The harmless treatment device for the high-salt organic wastewater containing sodium phenate provided by the utility model can solve the problem of treatment of the high-salt organic wastewater containing sodium phenate in industrial wastewater, simultaneously realizes resource utilization of waste, promotes green and healthy development of related enterprises, and drives industry to upgrade.
Description
Technical Field
The utility model belongs to the technical field of wastewater treatment, and particularly relates to a harmless treatment device for high-salt organic wastewater containing sodium phenolate.
Background
With the rapid development of the industry in China, the discharge amount of industrial wastewater is increasing day by day. Industrial wastewater has the characteristics of strong pollution (toxicity), difficult treatment and the like, if the industrial wastewater cannot be effectively treated and flows into the natural environment, the industrial wastewater can seriously deteriorate the water resource environment, reduce the soil productivity, threaten the grain production, hinder the economic development and directly form serious threat to the survival of human beings and other organisms. How to realize the harmlessness, reduction and reclamation of industrial wastewater becomes a pain point and a focus of attention in social development. Especially high-salt organic wastewater containing a large amount of toxic organic matters and high-concentration salt discharged in the industrial production processes of agriculture, pharmacy, fine chemistry industry and the like can not directly pass through biochemical treatment means, and the biochemical treatment is carried out after industrial salt in the wastewater is crystallized and separated; meanwhile, because the waste water contains organic matters such as formaldehyde and alcohols and phenolic substances which are difficult to degrade and have high boiling points, the waste water needs to be distilled at high temperature, and the obtained salt is crystallized into waste salt which cannot be recycled.
High-salt organic wastewater containing sodium phenolate is usually generated in the fine chemical industry, the wastewater is alkaline due to product characteristics, and the wastewater contains a large amount of other benzene series besides the sodium phenolate. Sodium phenolate is an organic substance with the chemical formula C6H5ONaCan be prepared by reacting phenol with sodium hydroxide, and can be used as antiseptic and organic synthesis intermediateAnd (3) a body. Sodium phenolate is unstable and easily oxidized and can react with strong oxidants. Decomposed by high heat to release toxic gas. And has strong irritation; pulmonary edema can result after inhalation; splash into the eye can cause eye burn; skin contact can cause burns; oral administration can corrode digestive tract, resulting in severe burn, abdominal pain, emesis, and bloody stool; renal damage may ensue after poisoning.
According to the related research reports at home and abroad, the specific method generally adopted for treating the high-salinity organic wastewater mainly comprises the following steps: biological methods, ion exchange methods, membrane separation methods, evaporation methods, pyrolysis/incineration methods, and the like. However, when high-salt organic wastewater containing sodium phenolate is treated, the traditional technical methods expose a series of problems from theory to practice: the biological method is only suitable for low-salt wastewater treatment due to the limited adaptability of microbial flora to salinity; when the ion exchange method is used for treating wastewater, if the salt content is too high, the exchanger can quickly reach the saturated capacity, the regeneration period is short, a large amount of regeneration agents are consumed, the consumption of washing water is increased, the treatment cost is increased, and the operation is complicated, so that the ion exchange method is only suitable for treating wastewater with low organic matter content; when the membrane method is used for treating wastewater, organic matters are easy to cause membrane pollution, which directly causes the reduction of water yield and the deterioration of water quality of produced water, and needs to be stopped for cleaning, thereby shortening the service life of the membrane and increasing the operation cost; the evaporative condensation method represented by MVR/MED is operated in a high-temperature and high-pressure environment, substances in the wastewater are easy to scale and coke, the efficiency is reduced, and pipelines are blocked, so that the equipment cannot be stably operated for a long time; when the pyrolysis/incineration method is used for treating the wastewater with high salt content, inorganic salts such as molten NaCl fall on the bottom and the inner wall of the incinerator, so that the equipment is seriously corroded and blocked. In view of the above, there is a need to develop a method for treating high-salinity organic wastewater with high efficiency and environmental friendliness.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a harmless treatment device for high-salinity organic wastewater containing sodium phenolate.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a harmless treatment device for high-salt organic wastewater containing sodium phenate comprises:
the acid adjusting reactor is used for adjusting the high-salt organic wastewater containing the sodium phenolate into acidity and layering the high-salt organic wastewater to form a water phase and an organic phase; the acid regulation reactor can be a conventional barrel-shaped container, high-salt organic wastewater containing sodium phenolate is firstly conveyed into the acid regulation reactor, then acid liquor is added into the acid regulation reactor to regulate the pH value of the wastewater to be weakly acidic, then the wastewater is kept stand for a period of time, and then the phenomenon of water phase and organic phase layering can occur, and then the subsequent treatment is carried out;
the evaporative crystallization device is used for removing water contained in the water phase to obtain waste salt containing organic matters; preferably, the evaporative crystallization device is an evaporator, and specifically can be an MVR evaporator; and the condensed water discharged by the evaporator enters a biochemical pool, and the condensed water is subjected to sewage treatment through the biochemical pool and can be discharged after reaching the standard.
The microwave pretreatment device is used for removing water and low-volatility organic matters contained in the organic phase to obtain organic solid waste; preferably, the microwave pretreatment device is a microwave dryer. Because the organic phase contains a large amount of moisture, if the organic phase directly enters a microwave pyrolysis system, the time and energy are consumed, and the production efficiency is low, so that the microwave pretreatment device is used for preheating the organic phase before microwave, and the subsequent microwave pyrolysis is continued after the moisture and low-volatility organic matters contained in the organic phase are removed, so that the energy is saved, the consumption is reduced, and the treatment efficiency is improved.
The microwave pyrolysis system is used for carrying out microwave heating pyrolysis on waste salt containing organic matters and organic solid waste to obtain inorganic salt; the microwave thermal cracking system can be a TS-MP500 microwave thermal cracking system which is an existing product in the market, and organic matters are heated to a certain temperature and then pyrolyzed through microwave heating. The exhaust port of the microwave pyrolysis system is connected with a waste gas treatment system, the used waste gas treatment system adopts an RTO system, and the RTO system is a waste gas treatment system with mature technology in the market. The waste salt containing organic matters and the organic solid waste can generate polluted waste gas in the cracking process, and the polluted waste gas is treated by an RTO system, so that the polluted waste gas is discharged after reaching the standard.
The refined salt system is used for refining and recycling inorganic salt; preferably, the refined salt system comprises a dissolving and filtering device and a heating and drying device; the dissolving and filtering device comprises a dissolving device and a centrifugal machine, wherein the dissolving device is a cylinder with a stirring device.
Wherein: the upper part of the acid regulation reactor is provided with a feed inlet and a first water outlet, and the lower part of the acid regulation reactor is provided with a second water outlet; the first water outlet is connected with a water inlet of the evaporative crystallization device; the second water outlet is connected with a water inlet of the microwave pretreatment device; the discharge hole of the evaporative crystallization device and the discharge hole of the microwave pretreatment device are both connected with the feed inlet of the microwave pyrolysis system; and a discharge hole of the microwave pyrolysis system is connected with a feed inlet of the refined salt system.
The working principle of the harmless treatment device for the high-salt organic wastewater containing sodium phenolate provided by the utility model is as follows:
sodium phenolate has a stable structure in an alkaline environment, but is easily reacted with an acid to generate phenol and sodium salt, and the reaction formula is as follows: c6H5ONa+H+＝C6H5OH+Na+The generated phenol is an organic matter and is immiscible with water to form an organic phase; the sodium salt is an inorganic salt and is dissolved in the water phase. Because the density of phenol is higher than that of water, the organic phase and the water phase are layered, the upper layer is the water phase, and the lower layer is the organic phase. Discharging the layered water phase from a first water outlet of the acid regulation reactor into an evaporative crystallization device, and removing water contained in the water phase through the evaporative crystallization device to obtain waste salt containing organic matters; discharging the layered organic phase from a second water outlet of the acid regulation reactor, allowing the organic phase to enter a microwave pretreatment device, and removing water and low-volatility organic matters contained in the organic phase through the microwave pretreatment device to obtain organic solid waste; conveying the organic waste salt and the organic solid waste to a microwave pyrolysis system for microwave heating pyrolysis to obtain inorganic salt; and finally, conveying the inorganic salt to a refined salt system for refining to obtain recyclable refined salt.
The utility model has the beneficial effects that:
according to the utility model, the acid liquor is added into the wastewater in the acid regulation reactor, so that the organic phase and the water phase are layered, the content of organic matters in the layered water phase is greatly reduced, and the organic matters are directly heated by an evaporative crystallization device, so that the high-efficiency separation of inorganic salt and the water phase can be realized, and the condensed water and the inorganic salt can be obtained. And the organic phase is subjected to microwave pyrolysis by adopting a microwave pyrolysis system, and most of inorganic salt is distributed in the water phase in the layering step, so that the problem of temperature overlapping of pyrolysis of organic matters and melting of the inorganic salt can be avoided, and the batch industrial treatment is facilitated.
The harmless treatment device for the high-salt organic wastewater containing sodium phenate provided by the utility model can solve the problem of treatment of the high-salt organic wastewater containing sodium phenate in industrial wastewater, simultaneously realizes resource utilization of waste, protects ecological environment, promotes green and healthy development of related enterprises, and drives industry upgrading.
Drawings
FIG. 1 is a block diagram of the harmless treatment device for high-salt organic wastewater containing sodium phenolate provided by the utility model;
FIG. 2 is a flow chart of a harmless treatment process of high-salt organic wastewater containing sodium phenolate.
Detailed Description
The utility model is further described with reference to the following figures and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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.
In the present invention, "fixed" or "mounted" means that two parts connected to each other are fixed together, and are generally fixed together by welding, screws, or gluing. "movably mounted" means that two parts are connected together and are capable of relative movement.
In the present invention, unless otherwise explicitly stated or limited, the terms "connected" and "connected" are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "first" and "second" do not denote any particular quantity or order, but rather are used to distinguish one element from another.
Referring to fig. 1, a harmless treatment apparatus for high-salt organic wastewater containing sodium phenolate includes:
the acid adjusting reactor is used for adjusting the high-salt organic wastewater containing the sodium phenolate into acidity and layering the high-salt organic wastewater to form a water phase and an organic phase;
the evaporative crystallization device is used for removing water contained in the water phase to obtain waste salt containing organic matters; furthermore, the evaporative crystallization device is an evaporator, condensed water discharged by the evaporator enters a biochemical pool, and the condensed water is subjected to sewage treatment through the biochemical pool and can be discharged after reaching the standard;
the microwave pretreatment device is used for removing water and low-volatility organic matters contained in the organic phase to obtain organic solid waste; preferably, the microwave pretreatment device is a microwave dryer. Because the organic phase contains a large amount of moisture, if the organic phase directly enters a microwave pyrolysis system, the time and energy are consumed, and the production efficiency is low, so that the microwave pretreatment device is used for preheating the organic phase before microwave, and the subsequent microwave pyrolysis is continued after the moisture and low-volatility organic matters contained in the organic phase are removed, so that the energy is saved, the consumption is reduced, and the treatment efficiency is improved.
The microwave pyrolysis system is used for carrying out microwave heating pyrolysis on waste salt containing organic matters and organic solid waste to obtain inorganic salt; furthermore, an exhaust port of the microwave pyrolysis system is connected with a waste gas treatment system, and an RTO system is selected as the waste gas treatment system. The method comprises the following steps of (1) generating polluted waste gas in the cracking process of waste salt containing organic matters and organic solid waste, and treating the polluted waste gas through an RTO (regenerative thermal oxidizer) system to enable the polluted waste gas to reach the standard and then be discharged;
the refined salt system is used for refining and recycling inorganic salt; further, the refined salt system comprises a dissolving and filtering device and a heating and drying device; the dissolving and filtering device comprises a dissolving device and a centrifugal machine, wherein the dissolving device is a cylinder with a stirring device. The heating and drying device can be an oven, an evaporator and the like.
Wherein: the upper part of the acid regulation reactor is provided with a feed inlet and a first water outlet, and the lower part of the acid regulation reactor is provided with a second water outlet; the first water outlet is connected with a water inlet of the evaporative crystallization device; the second water outlet is connected with a water inlet of the microwave pretreatment device; the discharge hole of the evaporative crystallization device and the discharge hole of the microwave pretreatment device are both connected with the feed inlet of the microwave pyrolysis system; and a discharge hole of the microwave pyrolysis system is connected with a feed inlet of the refined salt system.
The process for treating the high-salt organic wastewater containing sodium phenolate by using the harmless treatment device is shown in figure 2, firstly, the high-salt organic wastewater containing sodium phenolate is added into an acid regulation reactor, then hydrochloric acid is added into the acid regulation reactor through a feed inlet to regulate the pH of the wastewater to about 6, and after standing and layering, a water phase and an organic phase are formed, wherein the COD (chemical oxygen demand) and the TDS (total dissolved solids) in the water phase are detected to be 49000mg/L and 150000mg/L respectively; the COD in the organic phase was 128000 mg/L. Then discharging the water phase from a first water outlet of the acid regulation reactor into an evaporative crystallization device, removing water contained in the water phase through the evaporative crystallization device to obtain waste salt containing organic matters, wherein the TOC of the waste salt is 49400mg/kg, and discharged condensate water (COD is 19000mg/L and TDS is 250mg/L) enters a biochemical pool to be treated and discharged after reaching the standard; discharging the organic phase from a second water outlet of the acid regulation reactor, allowing the organic phase to enter a microwave pretreatment device, and removing water contained in the organic phase through the microwave pretreatment device to ensure that the thermal weight loss of the organic phase reaches about 40 percent to obtain organic solid waste; conveying the waste salt containing the organic matters and the organic solid waste to a microwave pyrolysis system for microwave heating pyrolysis to obtain inorganic salt, wherein the TOC of the inorganic salt is 21 mg/kg; and finally, conveying the inorganic salt to a refined salt system for refining to obtain recyclable refined salt. In the treatment process, the waste gas discharged by the microwave pyrolysis system is treated by the RTO system, so that the polluted waste gas is discharged after reaching the standard.
Claims (5)
1. The utility model provides a be used for high salt organic waste water innocent treatment device containing sodium phenolate which characterized in that: the method comprises the following steps:
the acid adjusting reactor is used for adjusting the high-salt organic wastewater containing the sodium phenolate into acidity and layering the high-salt organic wastewater to form a water phase and an organic phase;
the evaporative crystallization device is used for removing water contained in the water phase to obtain waste salt containing organic matters;
the microwave pretreatment device is used for removing water and low-volatility organic matters contained in the organic phase to obtain organic solid waste;
the microwave pyrolysis system is used for carrying out microwave heating pyrolysis on waste salt containing organic matters and organic solid waste to obtain inorganic salt;
the refined salt system is used for refining and recycling inorganic salt;
wherein: the upper part of the acid regulation reactor is provided with a feed inlet and a first water outlet, and the lower part of the acid regulation reactor is provided with a second water outlet; the first water outlet is connected with a water inlet of the evaporative crystallization device; the second water outlet is connected with a water inlet of the microwave pretreatment device; the discharge hole of the evaporative crystallization device and the discharge hole of the microwave pretreatment device are both connected with the feed inlet of the microwave pyrolysis system; and a discharge hole of the microwave pyrolysis system is connected with a feed inlet of the refined salt system.
2. The harmless treatment device for the high-salt organic wastewater containing sodium phenolate according to claim 1, characterized in that: the evaporative crystallization device is an evaporator, and condensed water discharged by the evaporator enters the biochemical pool.
3. The harmless treatment device for the high-salt organic wastewater containing sodium phenolate according to claim 1, characterized in that: the microwave pretreatment device is a microwave dryer.
4. The harmless treatment device for the high-salt organic wastewater containing sodium phenolate according to claim 1, characterized in that: and an exhaust port of the microwave pyrolysis system is connected with a waste gas treatment system.
5. The harmless treatment device for the high-salt organic wastewater containing sodium phenolate according to claim 1, characterized in that: the refined salt system comprises a dissolving and filtering device and a heating and drying device; the dissolving and filtering device comprises a dissolving device and a centrifugal machine, wherein the dissolving device is a cylinder with a stirring device.
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