CN113045083A - Intelligent treatment system and method for ethylene desulfurization wastewater - Google Patents
Intelligent treatment system and method for ethylene desulfurization wastewater Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 99
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 50
- 230000023556 desulfurization Effects 0.000 title claims abstract description 50
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000005977 Ethylene Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 95
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000005406 washing Methods 0.000 claims abstract description 15
- 239000003513 alkali Substances 0.000 claims abstract description 10
- 230000003647 oxidation Effects 0.000 claims description 47
- 239000007789 gas Substances 0.000 claims description 20
- 239000003518 caustics Substances 0.000 claims description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007418 data mining Methods 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 230000005501 phase interface Effects 0.000 abstract description 6
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 24
- 239000003054 catalyst Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 18
- 239000002699 waste material Substances 0.000 description 16
- 239000012071 phase Substances 0.000 description 15
- 238000012546 transfer Methods 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 238000009279 wet oxidation reaction Methods 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000012429 reaction media Substances 0.000 description 3
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- 229910052717 sulfur Inorganic materials 0.000 description 3
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- 239000012535 impurity Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
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- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- MPMSMUBQXQALQI-UHFFFAOYSA-N cobalt phthalocyanine Chemical compound [Co+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 MPMSMUBQXQALQI-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 150000007944 thiolates Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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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
-
- 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
-
- 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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides an intelligent treatment system and method for ethylene desulfurization wastewater. The intelligent processing system comprises: the system comprises an alkaline washing tower, a waste water heat exchanger, a waste water heater and an oxidation reaction device which are sequentially connected, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet, and the alkaline washing tower is provided with an alkaline liquor circulating pipeline; oxidizing water from the oxidation reaction device enters the wastewater heat exchanger from the heat source inlet, the heat source outlet is connected with a finished product tank, the alkali liquor circulation pipeline is connected with a desulfurization wastewater branch pipe, the desulfurization wastewater branch pipe is connected with the material inlet, and the material outlet is connected with a wastewater heater; the micro-interface generators are symmetrically arranged on the two side walls in the oxidation reaction device. The intelligent processing system improves the contact of the reaction phase interface after the micro-interface generator is arranged, and in addition, the intelligent processing system does not need manual operation and can realize intelligent control of the operating system.
Description
Technical Field
The invention relates to the field of ethylene desulfurization wastewater treatment, in particular to an intelligent treatment system and method for ethylene desulfurization wastewater.
Background
Ethylene is a main representative product of petrochemical industry, and has a very important position in petrochemical industry. The increase of the ethylene yield can drive and promote the increase of three synthetic materials and other organic materials, and the ethylene yield is a main mark for measuring the level of the national petrochemical industry. Therefore, the ethylene industry is vigorously developed in China, but various environmental problems are caused, and waste water and gas are generated in the ethylene production process in an indispensable way.
In the production operation of an ethylene device, a large amount of waste alkali liquor is generated by washing and removing various acid gases generated in the cracking process, and the main components of the waste alkali liquor are sulfide, residual sodium hydroxide and butter.
At present, most of domestic and foreign manufacturers adopt wet oxidation technology for treating various waste alkali liquors. Recently, when the Jilin ethylene device is put into production, the wet oxidation method is adopted to treat the desulfurization waste liquid of the alkaline washing tower, and the Jilin ethylene device and the production device are put into production simultaneously. Simple process, good effect and desulfurization rate of more than 90 percent. The method takes cobalt phthalocyanine as a catalyst and air as an oxidant to respectively oxidize sodium mercaptide and sodium sulfide in sulfur-containing wastewater from an alkaline washing tower into disulfideCompounds RSSR and Na2S2O3The main conditions are air: waste stream 100:1 (volume); the amount of the catalyst used is 5ppm/m3The sulfur content of the waste liquid is reduced from 4-5g/l to below 0.5g/l after the waste liquid is treated at normal temperature and normal pressure and the contact time is 3-5 hours, and the sulfur content of the waste liquid is lmg/1 below after the waste liquid is converged into a sewage station of a factory, so that the waste liquid reaches the national emission standard.
In the wet oxidation treatment process, although the operation temperature and pressure are not high after the catalyst is adopted, the operation can be basically realized at normal temperature and normal pressure, but the cost is higher after the catalyst is adopted, the problems of subsequent recovery and treatment of the catalyst are also considered after the subsequent reaction is finished, the operation is very inconvenient, and a lot of subsequent work is increased invisibly.
In addition, as informatization is developed more and more rapidly, the application of an intelligent system is more and more extensive, errors are easy to occur by adopting a manual control mode, and the labor cost is higher.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide an intelligent treatment system for ethylene desulfurization wastewater, which improves the mass transfer effect between two phases by arranging a micro-interface generator, the micro-interface generator can break bubbles into micron-level bubbles, so as to increase the phase interface area between a gas phase and a liquid phase, so that oxygen can be better fused with the ethylene desulfurization wastewater to form gas-liquid emulsion, and the oxidation reaction efficiency is improved.
Meanwhile, after the micro-interface generator is adopted, the whole intelligent treatment system can realize normal-temperature and normal-pressure operation without adopting a catalyst, the cost is saved without adopting the catalyst, the problem of secondary pollution caused by the fact that the catalyst needs to be subsequently recovered and treated is solved, the whole treatment method is simple, convenient and quick to operate, and the operation flow is correspondingly simplified.
The intelligent processing system can realize intelligent control of the operation parameters of the processing system, does not need manual control, reduces the error rate, improves the production efficiency, fully reduces the labor cost, and is worthy of wide popularization and application.
The second purpose of the invention is to provide a method for treating ethylene desulfurization wastewater by using the intelligent treatment system, the treatment method is simple and convenient to operate, the operation condition is milder, the energy consumption is low, the removal rate of harmful substances in the treated ethylene desulfurization wastewater can reach about 99%, and the method is worthy of wide popularization and application.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides an intelligent wastewater treatment system for treating ethylene desulfurization wastewater, which comprises: the system comprises an alkaline washing tower, a waste water heat exchanger, a waste water heater and an oxidation reaction device which are sequentially connected, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet, and the alkaline washing tower is provided with an alkaline liquor circulating pipeline;
the oxidized water from the oxidation reaction device enters the wastewater heat exchanger from the heat source inlet, the heat source outlet is connected with a finished product tank, the alkali liquor circulation pipeline is connected with a desulfurized wastewater branch pipe, the desulfurized wastewater branch pipe is connected with the material inlet, and the material outlet is connected with the wastewater heater;
the device comprises an oxidation reaction device, a pipeline and a gas inlet, wherein micro-interface generators are symmetrically arranged on two side walls in the oxidation reaction device and used for dispersing broken gas into bubbles;
the oxidation reaction device comprises a primary oxidation reactor and a secondary oxidation reactor which are sequentially connected, and oxidation water after oxidation treatment of the primary oxidation reactor continuously enters the secondary oxidation reactor for oxidation treatment.
The processing system also comprises an intelligent system, wherein the intelligent system consists of a big data intelligent control center for processing, storing and analyzing data, an output execution module for controlling the equipment through the output data information, and an equipment terminal controller, and the big data intelligent control center consists of a data acquisition module, a data mining module, a data storage module and a data transmission module.
Preferably, the equipment terminal controller is connected with the alkaline washing tower, the primary oxidation reactor and the secondary oxidation reactor to realize intelligent control of the equipment.
The ethylene waste alkali solution to be treated by the method contains high-concentration sodium sulfide, sodium hydrosulfide, thiolate, thiosulfate, phenols and other substances. Meanwhile, hydrocarbon polymers in the cracked gas enter the waste liquid in the alkali washing process, a layer of yellow oily matter exists on the surface of the waste liquid and exists in a water-in-oil type emulsion, the waste liquid is mainly treated by a wet oxidation technology at present, but in the wet oxidation treatment process, after the catalyst is adopted, although the operation temperature and the operation pressure are not high, the operation can be basically realized at normal temperature and normal pressure, the cost is higher after the catalyst is adopted, and after the subsequent reaction is finished, the problems of subsequent recovery and treatment of the catalyst are also considered, so that the operation is very inconvenient, and a lot of subsequent work is increased invisibly.
The invention provides an intelligent treatment system specially aiming at the treatment of ethylene desulfurization wastewater to solve the technical problems, the intelligent treatment system breaks and disperses air or oxygen entering the oxidation reaction device into bubbles through arranging the micro-interface generator at the bottom of the oxidation reaction device, so that the bubbles and the wastewater form gas-liquid emulsion, thereby increasing the phase interface area between the gas and the wastewater, further improving the reaction efficiency, and melting oxygen into the wastewater as much as possible after increasing the mass transfer effect of the reaction phase interface, thus, the good treatment effect can be ensured under the conditions of normal temperature and normal pressure without adopting a catalyst, or in order to ensure better treatment effect, a few catalysts can be added, the amount of the catalyst adopted in the traditional process can be reduced sufficiently, and the catalyst can be added or not added freely according to the actual operation condition.
The intelligent processing system is specially provided with an intelligent system capable of realizing intelligent control, and the intelligent system particularly comprises a big data intelligent control center capable of realizing data processing, storage and analysis, wherein the big data intelligent control center comprises a data acquisition module, a data mining module, a data storage module and a data transmission module, so that analysis, intelligent mining and storage are carried out in the background after the control data of the field equipment are acquired, the error rate is reduced when the field equipment is subsequently controlled, the control is closer to the degree of manual control, and the feedback is more sensitive.
Through the setting of the intelligent system, the real-time monitoring and intelligent control and adjustment of key indexes such as the temperature, the pressure, the material flow and the like of each key device can be realized. Especially, the working states of important equipment such as an alkaline tower, a primary oxidation reactor, a secondary oxidation reactor and the like are more conveniently and intelligently controlled.
Preferably, the micro-interface generator is a pneumatic micro-interface generator.
Preferably, the bottom in the oxidation reaction device is provided with 3 micro-interface generators, and each micro-interface generator is communicated with the air inlet, so that the cost can be considered, and the mass transfer effect can be ensured. Wherein two micro-interface generators are arranged at symmetrical positions on the side wall of the bottom, a better mass transfer effect is achieved through hedging, and the other micro-interface generator is arranged at the bottommost part of the oxidation reaction device.
It is understood by those skilled in the art that the micro-interface generator used in the present invention can break up the gas phase and/or the liquid phase in the multi-phase reaction medium into micro-bubbles and/or micro-droplets with micron-sized diameter in a preset action mode in the micro-interface generator before the multi-phase reaction medium enters the reactor through the mechanical microstructure and/or the turbulent microstructure, so as to increase the mass transfer area of the phase boundary between the gas phase and/or the liquid phase and/or the solid phase during the reaction, improve the mass transfer efficiency between the reaction phases, and strengthen the multi-phase reaction within a preset temperature and/or a preset pressure range.
The micro-interface generator can be used for reactions of gas-liquid, liquid-solid, gas-liquid, gas-liquid-solid, liquid-solid and other multi-phase reaction media, the specific structure of the micro-interface generator can be freely selected according to different flowing media, and corresponding records are also provided in patents and documents before the specific structure and specific functional action of the micro-interface generator, and additional details are not provided herein. Meanwhile, the number and the position of the air inlets can be adjusted according to the actual engineering requirements and the factors of the height, the length, the diameter, the waste water flow rate and the like of the oxidation reaction device in the system, so that the better air supply effect is achieved, and the oxidative degradation rate is improved.
The micro-interface generator is arranged at the middle lower part in the oxidation reaction device in a way of arranging the pipeline in the micro-interface generator, the pipeline can play a role of fixedly supporting the micro-interface generator, each micro-interface generator is connected with one branch pipe, then all the branch pipes are gathered to one main pipe, and the main pipe is connected with the air inlet, so that the positions of the micro-interface generators are designed, and the mass transfer between two phases of the dispersed and smashed gas and liquid can be better realized.
The oxidation reaction device comprises two stages of oxidation reactors, wherein the structures of the oxidation reactors of each stage are consistent, the micro-interface generators are arranged at the lower parts in the reactors, and the micro-interface generators in the two stages of oxidation reactors are connected with the air compression device through air inlets. The treatment effect of the waste water is enhanced by arranging two stages of oxidation reactors.
In addition, in the scheme of the invention, the ethylene desulfurization wastewater is heated by the wastewater heat exchanger and the wastewater heater and then enters the oxidation reaction device, the temperature of the oxidation water after the reaction of the oxidation reaction device is usually higher, and in order to fully utilize the heat, the ethylene desulfurization wastewater to be treated can be introduced into the wastewater heat exchanger to be heated. The oxidation water from the oxidation reaction device can also contain a part of oxygen, so that the oxidation water is recycled to the waste water heat exchanger for heat exchange after gas-liquid separation is carried out by the gas-liquid separation tank.
In order to recover the resources in the ethylene desulfurization wastewater, reduce the difficulty of wet oxidation of the ethylene desulfurization wastewater and improve the COD removal rate of the wastewater, the ethylene desulfurization wastewater is preferably pretreated before the wet oxidation, the pretreatment comprises adding a dewatering machine and other pretreatment means, and other pretreatment modes can be adopted according to actual working conditions.
Therefore, the intelligent treatment system for the ethylene desulfurization wastewater also comprises a dehydrator, wherein the dehydrator is connected with the alkaline tower;
preferably, a raw water pump for transporting desulfurization wastewater is arranged between the alkaline tower and the dehydrator.
Preferably, a conveying pump is arranged on a connecting pipeline of the waste water heat exchanger and the dehydrator.
The dehydrator of the present invention is preferably a vacuum belt dehydrator which performs dehydration by vacuum pumping of slurry, the slurry is fed onto a filter cloth of the vacuum belt dehydrator, the filter cloth is transferred by a heavy duty rubber belt, the rubber belt is transversely provided with grooves and a through hole in the middle to allow liquid to be sucked into a vacuum chamber. And simultaneously pumping the filtrate and air to a vacuum main pipe, enabling the filtrate in the vacuum filtrate collecting pipe to enter a gas-liquid separator for gas-water separation, connecting an outlet at the top of the gas-liquid separator with a vacuum pump, and pumping the gas out of the vacuum pump. And the separated filtrate enters a filtrate receiving water tank from an outlet at the bottom of the gas-liquid separator. The slurry is pumped in vacuum and passes through a forming area, a washing area and a drying area to form a qualified filter cake, and the qualified filter cake is conveyed into a discharge chute in a discharge area and conveyed into a warehouse by a transfer belt conveyor.
Preferably, the lateral upper part of the oxidation reaction device is provided with an oxidized water outlet, and the oxidized water outlet is connected with the heat source inlet through a pipeline.
Preferably, the intelligent processing system further comprises an air compression device, the air compression device is communicated with the air inlet, and air or compressed oxygen compressed by the air compression device enters the micro-interface generator through the air inlet to be dispersed and smashed. The compressed air or oxygen from the air compressor is preferably heated in a heat exchanger before entering the micro-interface generator.
The intelligent processing system can be provided with the pump body on the corresponding connecting pipeline according to actual needs.
The intelligent treatment system for the ethylene desulfurization wastewater has high treatment capacity, can ensure that the ethylene desulfurization wastewater has higher treatment effect under the condition of lower energy consumption after being treated by the intelligent treatment system, and has the harmful substance removal rate of about 99 percent.
In addition, the invention also provides a method for treating the ethylene desulfurization wastewater, which comprises the following steps:
heating the ethylene desulfurization wastewater from the alkaline tower, then feeding the ethylene desulfurization wastewater into an oxidation reaction device, and simultaneously introducing compressed air or compressed oxygen into the oxidation reaction device to perform oxidation reaction;
the compressed air or the compressed oxygen entering the oxidation reaction device is firstly dispersed and crushed by a micro-interface generator;
in the intelligent control process of the intelligent system, the big data intelligent control center transmits the analyzed and processed real operation data to the output execution module of the control equipment, and the output execution module controls the equipment terminal controller so as to control the technical process of the field equipment.
The method for treating the ethylene desulfurization wastewater has the advantages of simple and convenient operation, milder operation condition and low energy consumption, the removal rate of harmful substances and COD in the treated ethylene desulfurization wastewater can reach 99 percent, the discharge of industrial wastes is reduced, the method is more environment-friendly, the whole-process intelligent control can be realized, the artificial control is not needed, and the method is worthy of wide popularization and application.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the intelligent treatment system for the ethylene desulfurization wastewater, the mass transfer effect between two phases is improved by arranging the micro-interface generator, and the micro-interface generator can break bubbles into micron-level bubbles, so that the phase interface area between a gas phase and a liquid phase is increased, oxygen can be better fused with the ethylene desulfurization wastewater to form gas-liquid emulsion, and the oxidation reaction efficiency is improved;
(2) in the intelligent wastewater treatment system, the two-stage oxidation reactor is adopted to enhance the treatment effect of wastewater;
(3) the intelligent wastewater treatment system has the advantages of simple structure, less three wastes, realization of full recycling of oxygen and small occupied area;
(4) the intelligent wastewater treatment system improves the mass transfer effect between two phases by arranging the micro-interface generator, reduces energy consumption and production cost, and obviously improves the oxidation reaction efficiency;
(5) the intelligent treatment system can realize normal-temperature and normal-pressure operation without adopting a catalyst, not only saves the cost, but also avoids the problem of secondary pollution caused by the fact that the catalyst needs to be subsequently recovered and treated, the whole treatment method is simpler, more convenient and faster to operate, and the operation flow is correspondingly simplified;
(6) the intelligent processing system provided by the invention can realize analysis, intelligent mining processing and storage of the field control parameter background by arranging the big data intelligent control center, and is convenient, rapid and intelligent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of an intelligent treatment system for ethylene desulfurization wastewater provided by an embodiment of the invention;
fig. 2 is a functional block diagram of an intelligent system according to an embodiment of the present invention.
Description of the drawings:
10-an alkaline washing tower; 11-an alkali liquor circulation line;
12-an alkali liquor circulating pump; 13-a desulfurized waste water branch pipe;
20-dewatering machine; 30-raw water pump;
40-a waste water heat exchanger; 41-material inlet;
42-material outlet; 43-heat source inlet;
44-heat source outlet; 50-a waste water heater;
60-a secondary oxidation reactor; 61-an oxidized water outlet;
62-a micro-interface generator; 63-air inlet;
64-a pneumatic device; 65-a vent;
70-a primary oxidation reactor; 80-a delivery pump;
90-finished product tank; 100-a buffer tank;
110-a gas-liquid separation tank; 120-intelligent system.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. 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. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to more clearly illustrate the technical solution of the present invention, the following description is made in the form of specific embodiments.
Examples
Referring to fig. 1, an intelligent treatment system for ethylene desulfurization wastewater according to an embodiment of the present invention includes an alkaline tower 10, a wastewater heat exchanger 40, a wastewater heater 50, an oxidation reaction device, and an air compressor 74, which are connected in sequence.
Wherein, the waste water heat exchanger 40 is respectively provided with a material inlet 41, a material outlet 42, a heat source inlet 43 and a heat source outlet 44, the alkaline tower is provided with an alkaline liquor circulating pipeline 11, the alkaline liquor circulating pipeline 11 is provided with an alkaline liquor circulating pump 12, alkaline liquor is sprayed in the alkaline tower 10 to carry out desulfurization treatment on acid gas, when the alkaline liquor is saturated, waste liquor is formed and needs to be treated, the desulfurization waste water branch pipe 13 connected from the alkaline liquor circulating pipeline 11 is conveyed to carry out wet oxidation treatment, the desulfurization waste water branch pipe 13 is connected with the material inlet 41, oxidized water from an oxidation reaction device enters the waste water heat exchanger 60 from the heat source inlet 43, the heat source outlet 44 is connected with a finished product tank 90, the material outlet 42 is connected with a waste water heater 50, in the waste water heat exchanger 40, the oxidized water after the reaction of the oxidation reaction device exchanges heat with the ethylene desulfurization waste water to be treated, thereby achieving the effect of fully utilizing energy.
The side upper part of the secondary oxidation reactor 60 is provided with an oxidized water outlet 61, the oxidized water from the oxidized water outlet 61 is firstly subjected to gas-liquid separation in a gas-liquid separation tank 110 and then is connected with a heat source inlet 43 through a pipeline, the lower part in the secondary oxidation reactor 60 is provided with a micro-interface generator 62, the micro-interface generator 62 is used for dispersing the crushed gas into bubbles, the bottom wall of the secondary oxidation reactor 60 is provided with a gas inlet 63, the gas inlet 63 is connected with the micro-interface generator 62 through a pipeline, an air pressure device 64 is communicated with the gas inlet 63, and the air or oxygen compressed by the air pressure device 64 enters the micro-interface generator 62 through the gas inlet 63 to realize the crushing and dispersion of the gas so as to enhance the mass transfer effect between the two phases. The air compressor means 64 is preferably an air compressor. The air or oxygen compressed by the air compressor is heated by the heat exchanger and then enters the micro-interface generator 62. The type of air compressor can be selected as a centrifugal air compressor, and the type of compressor is low in cost and convenient to use. The type of the micro-interface generator 62 is a pneumatic micro-interface generator 62, the number of the micro-interface generators 62 is 3, the micro-interface generators 62 are symmetrically arranged on the two side walls in the secondary oxidation reactor 60, and the micro-interface generators 62 are further arranged at the bottom of the secondary oxidation reactor 60, so that the symmetrical arrangement can realize hedging and enhance the mass transfer effect. The oxidized water from the secondary oxidation reactor 60 is directly sent to the waste water heat exchanger 40 for heat exchange, and is cooled down after heat exchange and then is conveyed to the finished product tank 90 for storage. The structure of the primary oxidation reactor 70 corresponds to the structure of the secondary oxidation reactor 60. The water from the product tank 90 may continue to undergo subsequent desalination by conventional means of the prior art.
This intelligent processing system has still included vacuum belt hydroextractor 20, and this vacuum belt hydroextractor 20 is connected with caustic wash tower 10, is provided with the raw water pump 30 that is used for transporting desulfurization waste water between caustic wash tower 10 and the hydroextractor 20, is provided with delivery pump 80 on the connecting tube of waste water heat exchanger 40 and hydroextractor 20, and the waste water after breaking away from impurity from vacuum belt hydroextractor 20 is kept in buffer tank 100 temporarily, then enters into waste water heat exchanger 40 through delivery pump 80 from buffer tank 100.
The intelligent system 120 is electrically connected to the caustic washing tower 10, the primary oxidation reactor 70, and the secondary oxidation reactor 60 in the above embodiments, so as to achieve actual intelligent control of each device, and a flow chart of the specific intelligent system is shown in fig. 2.
In the above embodiment, the number of the micro-interface generators 62 is not limited, and in order to increase the dispersion and mass transfer effects, additional micro-interface generators 62 may be additionally provided, especially, the installation position of the micro-interface generator 62 is not limited, and the micro-interface generator may be external or internal, and when the micro-interface generator is internal, the micro-bubble generator may be installed on the side wall in the kettle in a manner of being oppositely arranged, so as to realize the opposite flushing of the micro-bubbles coming out from the outlet of the micro-interface generator 62.
In the two embodiments, the number of the pump bodies is not specifically required, and the pump bodies can be arranged at corresponding positions according to requirements.
The working process and principle of the intelligent treatment system for ethylene desulfurization wastewater of the present invention are briefly described as follows:
after the nitrogen gas purges the caustic tower 10, the wastewater heat exchanger 40, the wastewater heater 50, the pipelines of the oxidation reaction device and the inside of the oxidation reaction device, the ethylene desulfurization wastewater in the caustic tower 10 is sent to the dehydrator 20 through the raw water pump 30 for pretreatment to remove impurities, and the pretreated wastewater is temporarily stored in the buffer tank 100.
Then, the ethylene desulfurization wastewater is sent into a wastewater heat exchanger 40 through a delivery pump 80 for heat exchange, and then is further heated through a wastewater heater 50, the heated ethylene desulfurization wastewater enters an oxidation reaction device for oxidation treatment, and sequentially passes through a first-stage oxidation reactor 70 and a second-stage oxidation reactor 60 for two-stage oxidation treatment, compressed air or compressed oxygen is introduced from the bottom of the oxidation reaction device, and is firstly treated by a micro-interface generator 62 and then undergoes oxidation reaction, so as to improve the mass transfer efficiency of a phase interface, and vent holes 75 are formed in the tops of the first-stage oxidation reactor 70 and the second-stage oxidation reactor 60.
The oxidation water after oxidation reaction in the oxidation reaction device returns to the waste water heat exchanger 50 from the top of the oxidation reaction device for heat exchange and cooling treatment, and then is conveyed to the finished product tank 90 for storage.
The above steps are repeated circularly to make the whole intelligent processing system run stably.
The intelligent treatment system ensures that wet oxidation is carried out at normal temperature and normal pressure by laying the micro-interface generation system, and does not need to adopt a catalyst. Compared with the intelligent treatment system for the ethylene desulfurization wastewater in the prior art, the intelligent treatment system has the advantages of few equipment components, small occupied area, low energy consumption, low cost, high safety, controllable reaction and wide popularization and application value.
In a word, the intelligent treatment system for the ethylene desulfurization wastewater has high treatment capacity, and after the treatment by the intelligent treatment system, the ethylene desulfurization wastewater can have a higher treatment effect under the condition of lower energy consumption, and the removal rate of harmful substances and COD can reach 99%.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an intelligent processing system of ethylene desulfurization waste water which characterized in that includes: the system comprises an alkaline washing tower, a waste water heat exchanger, a waste water heater and an oxidation reaction device which are sequentially connected, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet, and the alkaline washing tower is provided with an alkaline liquor circulating pipeline;
the oxidized water from the oxidation reaction device enters the wastewater heat exchanger from the heat source inlet, the heat source outlet is connected with a finished product tank, the alkali liquor circulation pipeline is connected with a desulfurized wastewater branch pipe, the desulfurized wastewater branch pipe is connected with the material inlet, and the material outlet is connected with the wastewater heater;
the device comprises an oxidation reaction device, a pipeline and a gas inlet, wherein micro-interface generators are symmetrically arranged on two side walls in the oxidation reaction device and used for dispersing broken gas into bubbles;
the oxidation reaction device comprises a primary oxidation reactor and a secondary oxidation reactor which are sequentially connected, and oxidation water after oxidation treatment of the primary oxidation reactor continuously enters the secondary oxidation reactor for oxidation treatment;
the intelligent system consists of a big data intelligent control center for processing, storing and analyzing data, an output execution module for controlling equipment through output data information and an equipment terminal controller, wherein the big data intelligent control center consists of a data acquisition module, a data mining module, a data storage module and a data transmission module;
preferably, the equipment terminal controller is connected with the alkaline washing tower, the primary oxidation reactor and the secondary oxidation reactor to realize intelligent control of the equipment.
2. The intelligent processing system according to claim 1, further comprising a dehydration engine coupled to the caustic tower.
3. The intelligent processing system according to claim 2, wherein a raw water pump for transporting desulfurization wastewater is arranged between the caustic tower and the dehydrator.
4. The intelligent processing system according to claim 1, wherein the micro-interface generator is a pneumatic micro-interface generator.
5. The intelligent treatment system according to claim 1, wherein a micro-interface generator is arranged at the bottom of the oxidation reaction device, the number of the micro-interface generators is 3, and each micro-interface generator is communicated with the air inlet.
6. The intelligent treatment system according to any one of claims 1 to 5, wherein the side upper part of the oxidation reaction device is provided with an oxidized water outlet, and the oxidized water outlet is connected with the heat source inlet through a pipeline.
7. The intelligent treatment system according to claim 3, wherein a delivery pump is arranged on a connecting pipeline of the wastewater heat exchanger and the dehydrator.
8. The intelligent processing system according to any of claims 1-5, further comprising an air compressor, the air compressor being in communication with the air inlet.
9. The intelligent processing system according to claim 2, wherein the extractor is of the type of a vacuum belt extractor.
10. The method for treating the ethylene desulfurization wastewater by using the intelligent treatment system as claimed in any one of claims 1 to 9, characterized by comprising the steps of:
heating the ethylene desulfurization wastewater from the alkaline tower, then feeding the ethylene desulfurization wastewater into an oxidation reaction device, and simultaneously introducing compressed air or compressed oxygen into the oxidation reaction device to perform oxidation reaction;
the compressed air or the compressed oxygen entering the oxidation reaction device is firstly dispersed and crushed by a micro-interface generator;
in the intelligent control process of the intelligent system, the big data intelligent control center transmits the analyzed and processed real operation data to the output execution module of the control equipment, and the output execution module controls the equipment terminal controller so as to control the technical process of the field equipment.
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| CN201911367590.0A CN113045083A (en) | 2019-12-26 | 2019-12-26 | Intelligent treatment system and method for ethylene desulfurization wastewater |
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| CN201911367590.0A CN113045083A (en) | 2019-12-26 | 2019-12-26 | Intelligent treatment system and method for ethylene desulfurization wastewater |
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Application publication date: 20210629 |