CN217127205U - Contain salt organic wastewater treatment system - Google Patents
Contain salt organic wastewater treatment system Download PDFInfo
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- CN217127205U CN217127205U CN202220364783.1U CN202220364783U CN217127205U CN 217127205 U CN217127205 U CN 217127205U CN 202220364783 U CN202220364783 U CN 202220364783U CN 217127205 U CN217127205 U CN 217127205U
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Abstract
The utility model provides a salt-containing organic wastewater treatment system, which comprises an oxidation treatment device, a concentration device, a crystallization device and a biochemical pool, wherein the oxidation treatment device is provided with an oxidation reaction kettle and a feeding component for feeding into the oxidation reaction kettle, the concentration device is provided with a reverse osmosis module, and the crystallization device is provided with an evaporation tower; the reation kettle discharge end with the reverse osmosis module connect, the reverse osmosis module be equipped with concentration district and purification district, concentration district be connected with the evaporating tower, the purification district is connected with biochemical pond, the evaporating tower crystallization export, raffinate export and steam outlet have, raffinate export and steam outlet be connected with biochemical pond. The utility model discloses at first carry out oxidation treatment to waste water, get rid of most organic matter wherein, send oxidation treatment liquid to reverse osmosis module and evaporating tower again in, reduced the pollution of organic matter to the osmotic membrane, reduced the content of impurity in the inorganic salt of recovery.
Description
Technical Field
The utility model relates to an industrial wastewater treatment technical field specifically relates to a contain salt organic wastewater treatment system.
Background
Industrial processes, such as caprolactam production, produce large amounts of industrial waste water containing inorganic salts and high levels of organic matter. Caprolactam is a raw material for producing nylon-6, a large amount of organic wastewater which is difficult to degrade is generated in the production process, organic matters in the wastewater generally comprise cyclohexylamine peroxide, cyclohexane azo, anthraquinone toluene, cyclohexanone oxime and the like, and simultaneously, a large amount of ammonium sulfate serving as a byproduct is also contained in the wastewater. How to achieve harmless treatment of these industrial wastewaters and maximum utilization of resources is an important factor affecting production costs.
The patent with publication number CN112174423A provides a method for treating caprolactam production wastewater, which comprises the steps of firstly carrying out normal pressure feeding distillation treatment on the caprolactam production wastewater to obtain ammonium sulfate crystals, distillation condensate and distillation residual liquid, then recovering the ammonium sulfate crystals, recovering an upper organic layer of the distillation residual liquid, and finally introducing lower layer waste liquid of the distillation residual liquid and the distillation residual liquid into a biochemical tank for harmless treatment. The method recovers ammonium sulfate salt and organic matters in the caprolactam production wastewater to improve the resource utilization rate, but the wastewater has high-concentration organic matters during distillation, the purity of ammonium sulfate crystals is poor, and the lower layer waste liquid of the distillation residual liquid contains high-concentration organic impurities and salt, and the lower layer waste liquid is introduced into a biochemical pool to be directly treated and is difficult to reach the discharge standard.
Scheme of utility model
The utility model provides a salt-containing organic wastewater treatment system, which has the advantages of higher purity of inorganic salt recovered from wastewater, lower energy consumption and higher removal rate of organic matters in the wastewater,
in order to achieve the above purpose, the utility model adopts the following technical scheme:
a salt-containing organic wastewater treatment system comprises an oxidation treatment device, a concentration device, a crystallization device and a biochemical pond, wherein the oxidation treatment device is provided with an oxidation reaction kettle and a feeding assembly for feeding materials into the oxidation reaction kettle, the concentration device is provided with a reverse osmosis module, and the crystallization device is provided with an evaporation tower; the reation kettle discharge end with the reverse osmosis module connect, the reverse osmosis module be equipped with concentration district and purification district, concentration district be connected with the evaporating tower, the purification district is connected with biochemical pond, the evaporating tower crystallization export, raffinate export and steam outlet have, raffinate export and steam outlet be connected with biochemical pond.
In the description of the present invention, it should be noted that the terms "connected", "connected" and "connected" include direct connection and indirect connection, and the meanings of the direct connection and the indirect connection are as follows: a → B is the direct connection between A and B, A → C → B is the indirect connection between A and B through C; the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses at first adopt an oxidation treatment device to handle waste water, get rid of most organic matter wherein, obtain the oxidation treatment liquid, again afterwards with the oxidation treatment liquid leading-in to the enrichment facility in, adopt the reverse osmosis module to handle, the reverse osmosis module is handled the back, the less purification waste water of solute content can be obtained in its purification district, the higher concentrated waste water of solute content can be obtained in the concentration district, purification waste water is because COD and salt content are lower, can directly lead-in carry out innocent treatment to biochemical pond, concentrated waste water then leads to further processing to in the crystallization device. In the evaporation tower of crystallization device, concentrated waste water is appeared the crystallization under the heating, compare in direct crystallization, the required liquid evaporation capacity greatly reduced of concentrated waste water, the energy consumption has been reduced, simultaneously because organic matter is got rid of by most in oxidation reation kettle in the upstream step, therefore the osmotic membrane receives organic matter to pollute less when the reverse osmosis module is concentrated, osmotic membrane life is longer, organic matter impurity is also less in the inorganic salt that retrieves when the evaporation tower crystallization obtained, follow-up purification step is simpler. The steam generated by the evaporation tower is collected through a steam outlet and is guided into the biochemical pool, and the residual liquid is guided into the biochemical pool through a residual liquid outlet, so that the organic matters are harmlessly treated to the maximum extent.
Furthermore, the steam outlet is connected with a condensing device, and the condensing device is connected with the biochemical pool.
Further, the feeding assembly comprises a wastewater feeding device and an oxidant feeding device.
Further, oxidant feed arrangement sets up air inlet pipe and oxygen inlet pipe including parallelly connected, the air inlet pipe be connected with air conveyer, the oxygen inlet pipe be connected with oxygenerator and oxygen conveyer, air inlet pipe and oxygen inlet pipe converge and form the total inlet pipe of oxidant.
Further, waste water feed arrangement include waste water storage jar and waste water inlet pipe, waste water inlet pipe and oxidant total inlet pipe converge the back and form the reation kettle inlet pipe, reation kettle inlet pipe be connected with reation kettle's feed end.
In recent years, in the field of oxidation treatment of industrial wastewater, subcritical water oxidation has been increasingly applied. The general oxidation treatment needs to add strong oxidation reagents such as peroxide, chloric acid and the like, and most of the oxidation treatment needs to react with organic matters under an acidic condition, so that the method has high cost on one hand and serious corrosion on a reaction kettle on the other hand. The subcritical water oxidation method can adopt air or oxygen as a catalyst, and does not need to be carried out under acidic conditions, so that the method has higher economic benefit. The utility model discloses be equipped with parallelly connected air inlet pipe and oxygen inlet pipe, both converge and form the total inlet pipe of oxidant, through the flow of air-conditioning inlet pipe or oxygen inlet pipe, can form the oxygen boosting air of different oxygen contents in the total inlet pipe of oxidant, because different types of industrial waste water COD content is different, the utility model discloses oxygen content among the accessible control oxygen boosting air handles different industrial waste water to control cost under the prerequisite of guaranteeing the organic matter clearance. The oxygen-enriched air in the oxidant main feeding pipe and the wastewater in the wastewater feeding pipe are fully mixed and contacted in the feeding pipe of the reaction kettle and are guided into the oxidation reaction kettle together, so that the oxidation efficiency is improved.
Furthermore, the reaction kettle feeding pipe is connected with a heat exchanger, the reaction kettle feeding pipe is connected with a cold fluid channel of the heat exchanger, and the discharge end of the oxidation reaction kettle is connected with a hot fluid channel of the heat exchanger. The wastewater and enriched air are combined in the heat exchanger for further mixing.
Furthermore, the discharge end of the oxidation reaction kettle is connected with a gas-liquid separation device, a gas phase outlet of the gas-liquid separation device is connected with a tail gas treatment device, and a liquid phase outlet of the gas-liquid separation device is connected with the reverse osmosis module. Since the oxidation reaction occurring in the oxidation reaction vessel generates a large amount of gas such as carbon dioxide, it is necessary to separate and depressurize the gas in a gas-liquid separator.
Furthermore, the oxygen generating device is a pressure swing adsorption oxygen generator.
To sum up, use the utility model discloses can gain following beneficial effect:
1. the utility model discloses during the inorganic salt in the recovery waste water, at first adopt the reverse osmosis method to get rid of a large amount of moisture, make the concentration of inorganic salt improve, send the solution after the concentration to the evaporation tower in carrying out the crystallization again, greatly reduced the solvent amount of required evaporation when the evaporation crystallization, reduced the energy consumption.
2. The utility model discloses at first carry out oxidation treatment to waste water, get rid of most organic matter wherein, send oxidation treatment liquid to reverse osmosis module and evaporating tower again in, reduced the organic matter to the pollution of reverse osmosis module mesoosmotic membrane, reduced the organic impurity content of inorganic salt crystal in the evaporating tower.
3. The utility model discloses an organic matter in the oxidation reaction kettle can adopt subcritical water oxidation method to decompose waste water, when using this method, parallelly connected air inlet pipe and the oxygen inlet pipe can be designed to oxidant feed arrangement, two pipes converge and form the total inlet pipe of oxidant, flow through adjusting air inlet pipe or oxygen inlet pipe, can form the oxygen boosting air of different oxygen contents in the total inlet pipe of oxidant to be suitable for the industrial waste water of different COD content, make the organic matter clearance higher, the simultaneous control cost.
4. The utility model discloses an oxygen boosting air and waste water gather intensive mixing at reation kettle inlet pipe and heat exchanger and lead-in again to oxidation reaction cauldron in, make oxidation reaction cauldron internal oxidation efficiency higher.
Drawings
FIG. 1 is a schematic structural diagram of a salt-containing organic wastewater recovery treatment system in an embodiment;
in the figure.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
As shown in FIG. 1, the present embodiment provides a salt-containing organic wastewater treatment system, which mainly comprises four units, namely an oxidation treatment device, a concentration device, a crystallization device and a biochemical pond, for performing harmless treatment on organic matters in salt-containing organic wastewater and simultaneously recovering inorganic salts in the wastewater.
Specifically, the oxidation treatment device comprises an oxidation reaction kettle 1 for oxidation reaction of organic matters in wastewater and a series of feeding assemblies arranged at the feeding end of the oxidation reaction kettle, wherein each feeding assembly comprises an oxidant feeding device and a wastewater feeding device, the oxidant feeding device comprises an air conveyor 11 and an oxygen conveyor 12 which are arranged in parallel, the air conveyors are connected with air feeding pipes, the oxygen conveyors are connected with oxygen feeding pipes, the air conveying pipes and the oxygen conveying pipes are finally converged to form a total oxidant feeding pipe, and a pressure swing adsorption oxygen generator 13 is arranged at the upstream of each oxygen conveyor and used for providing oxygen for the oxygen conveyors. Oxygen-enriched air with different oxygen contents can be obtained in the total oxidant feeding pipe by adjusting the process parameters of the air conveyor, the oxygen conveyor and the pressure swing adsorption oxygen generator; waste water feed arrangement includes a waste water storage jar 14, and waste water storage jar passes through the waste water inlet pipe and to the feeding of oxidation reaction cauldron direction, is connected with first filter at the waste water inlet pipe at first, gets rid of the solid impurity in the waste water, and the waste water inlet pipe joins with the total inlet pipe of oxidant afterwards, forms the reation kettle inlet pipe, and waste water and oxygen-enriched air can realize mixing in the reation kettle inlet pipe. The feed pipe of the reaction kettle is firstly connected with a heat exchanger 15, so that the wastewater and the oxygen-enriched air in the feed pipe of the reaction kettle are heated when passing through the cold fluid channel, and simultaneously the wastewater and the oxygen-enriched air are further uniformly mixed in the cold fluid channel, and then the feed pipe of the reaction kettle passes through a secondary heater and is finally connected to the feed end of the reaction kettle. The oxidation treatment liquid led out from the discharge end of the reaction kettle firstly passes through a hot fluid channel of a heat exchanger 15, passes through a heat source for the heat exchanger, and then is led into a gas-liquid separator 5. The gas phase outlet of the gas-liquid separator is connected with a tail gas treatment device 51, the tail gas can be discharged after being purified by the tail gas treatment device and the liquid phase is introduced into the concentration device after being treated by the second filter.
The enrichment facility is equipped with reverse osmosis module 2, and the reverse osmosis module is equipped with a concentration zone 22 and a purification district 21, and the oxidation treatment liquid that gets into in the reverse osmosis module has formed the high enriched liquid that is in the concentration zone under the effect of osmotic membrane and has been in the low dense liquid in purification district, and solute content such as inorganic salt and organic matter is all less in the low dense liquid, can directly arrange to carry out innocent treatment in biochemical pond 4, and high dense liquid is then leading-in to handle in the crystallization facility. The crystallizing device is provided with an evaporating tower 3, the top of the evaporating tower is provided with a steam outlet, the bottom of the evaporating tower is provided with a crystallizing outlet and a residual liquid outlet, the steam outlet is connected with a condenser, the steam reaching the condenser is liquefied and then discharged into a biochemical pool, and the residual liquid is discharged into the biochemical pool after operations such as pH adjustment and the like.
The utility model discloses only describe above and realize the required main equipment of purpose and structure, some with the utility model discloses technical scheme does not have the equipment of direct relevance, if be arranged in control pipe liquid pump, the buffer tank of setting between two processing unit of liquid flow, is the conventional technique in this field, consequently no longer gives unnecessary details.
Claims (8)
1. The utility model provides a contain salt organic waste water processing system which characterized in that: the device comprises an oxidation treatment device, a concentration device, a crystallization device and a biochemical pool, wherein the oxidation treatment device is provided with an oxidation reaction kettle and a feeding assembly for feeding materials into the oxidation reaction kettle; the reation kettle discharge end with the reverse osmosis module connect, the reverse osmosis module be equipped with concentration district and purification district, concentration district be connected with the evaporating tower, the purification district is connected with biochemical pond, the evaporating tower crystallization export, raffinate export and steam outlet have, raffinate export and steam outlet be connected with biochemical pond.
2. A salt-containing organic wastewater treatment system according to claim 1, characterized in that: the steam outlet is connected with a condensing device, and the outlet end of the condensing device is connected with the biochemical tank.
3. A salt-containing organic wastewater treatment system according to claim 1, characterized in that: the feeding assembly comprises a wastewater feeding device and an oxidant feeding device.
4. A salt-containing organic wastewater treatment system according to claim 3, characterized in that: oxidant feed arrangement sets up air inlet pipe and oxygen inlet pipe including parallelly connected, the air inlet pipe be connected with air conveyer, the oxygen inlet pipe be connected with oxygenerator and oxygen conveyer, air inlet pipe and oxygen inlet pipe converge and form the total inlet pipe of oxidant.
5. A salt-containing organic wastewater treatment system according to claim 4, characterized in that: waste water feed arrangement include waste water storage jar and waste water inlet pipe, waste water inlet pipe and oxidant total inlet pipe converge the back and form the reation kettle inlet pipe, reation kettle inlet pipe be connected with reation kettle's feed end.
6. A salt-containing organic wastewater treatment system according to claim 5, characterized in that: the feeding assembly further comprises a heat exchanger, a feeding pipe of the reaction kettle is connected with a cold fluid channel of the heat exchanger, and a discharging end of the oxidation reaction kettle is connected with a hot fluid channel of the heat exchanger.
7. A salt-containing organic wastewater treatment system according to claim 1, characterized in that: the discharge end of the oxidation reaction kettle is connected with a gas-liquid separation device, a gas phase outlet of the gas-liquid separation device is connected with a tail gas treatment device, and a liquid phase outlet of the gas-liquid separation device is connected with the reverse osmosis module.
8. A salt-containing organic wastewater treatment system according to claim 4, characterized in that: the oxygen generating device is a pressure swing adsorption oxygen generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220364783.1U CN217127205U (en) | 2022-02-23 | 2022-02-23 | Contain salt organic wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220364783.1U CN217127205U (en) | 2022-02-23 | 2022-02-23 | Contain salt organic wastewater treatment system |
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| CN217127205U true CN217127205U (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220364783.1U Active CN217127205U (en) | 2022-02-23 | 2022-02-23 | Contain salt organic wastewater treatment system |
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Address after: Room 303, 3 / F, building 4, 972 Moganshan Road, Gongshu District, Hangzhou City, Zhejiang Province 310000 Patentee after: Hangzhou Shenrui Environment Co.,Ltd. Address before: 310011 No. 972 Moganshan Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU SUNRISE WATER AFFAIRS Co.,Ltd. |
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