CN208327559U - A kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation - Google Patents

A kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation Download PDF

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CN208327559U
CN208327559U CN201820425379.4U CN201820425379U CN208327559U CN 208327559 U CN208327559 U CN 208327559U CN 201820425379 U CN201820425379 U CN 201820425379U CN 208327559 U CN208327559 U CN 208327559U
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high temperature
water
water tank
outlet
ultrafiltration membrane
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李克非
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Harbin Industrial University Boshi Environmental Engineering Co Ltd
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Harbin Industrial University Boshi Environmental Engineering Co Ltd
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Abstract

The utility model discloses a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation, belong to industrial wastewater treatment device technical field.The equipment includes caching water tank, water supply pump, high temperature ultrafiltration membrane system, intermediate water tank, high-pressure pump, high temperature counter-infiltration system, clear water water tank and backwashing pump;Caching water tank is connected by water supply pump with high temperature ultrafiltration membrane system;High temperature ultrafiltration membrane system is connected with intermediate water tank;Intermediate water tank is connected by high-pressure pump with high temperature counter-infiltration system;High temperature counter-infiltration system is connected with clear water water tank;Intermediate water tank is connected by backwashing pump with high temperature ultrafiltration membrane system.Hot industry waste water can be effectively treated in the device, reduce the pollutant load in hot industry waste water, and maintain it under higher state of temperature, recycled advantageous as high-temperature water, save water resource, energy saving.Utility model device is suitable for processing industrial wastewater.

Description

A kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation
Technical field
The utility model relates to a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation, belong to Industry Waste Technical field of water treatment equipment.
Background technique
Hot industry water and waste water be mainly derived from oil refining, chemical industry, chemical fertilizer, oil exploitation, etc. many industrial circles.Such as heat The heat tracing condensed water in high temperature of the steam condensate in power power plant, oil-refining chemical;From the devices such as oil plant catalytic cracking plus hydrogen Acid steam water;Oil field extracted water etc. from oil extraction, wherein most oil content is low, containing low compared with salt, calorific value is high, such as with 80 DEG C of waste water water temperature calculating, with normal temperature phase ratio (25 DEG C), the value of calorific value is about 10.0 yuans or so, therefore, in height These industrial wastewaters are recycled under temperature state, can not only recycle water resource, and energy-saving and emission-reduction is significant, and can get considerable Economic benefit.At present except high temperature oil-containing condensed water is in addition to progress is partially recycled, other hot waste waters are largely all made of cooling Afterwards, the processing modes such as flocculation, flotation, filtering, biochemistry, using qualified discharge as processing intent;Or simple reuse is carried out, cause water Low use is cleaned former if oil plant is by the heat tracing condensed water direct reuse of oil-containing to desalting in oil refinery technique as electric desalting water Oil, due to can not effectively recycle the thermal energy of waste water, causes the huge waste of energy in above-mentioned treatment process.
Membrane technology (ultra filtration, nanofiltration, reverse osmosis) is oil removing, desalination and the most effective technological means of purified water, oneself is extensively The multiple fields in water process are applied on ground, as the development of membrane material can carry out phase to such waste water using film resistant to high temperature It should handle.
Utility model content
The purpose of the present invention is to provide a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation, pass through The high temperature moisturizing of the device treated high temperature clear water may be used as other production technologies.
To achieve the above object, the invention provides the following technical scheme:
A kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation, the equipment include caching water tank 1, are supplied water Pump 2, high temperature ultrafiltration membrane system 3, intermediate water tank 4, high-pressure pump 5, high temperature counter-infiltration system 6, clear water water tank 7 and backwashing pump 8;Its In: multiple tubular type refractory ceramics ultrafiltration membranes placed side by side are equipped with inside the high temperature ultrafiltration membrane system 3;The high temperature ultrafiltration Membranous system 3 is additionally provided with water intake 31, water outlet 32, backwash water inlet 33 and outlet water outlet 34;The high temperature reverse osmosis Permeable system 6 includes multiple groups rolling high temperature reverse osmosis membrane assembly placed side by side, and every group of rolling high temperature reverse osmosis membrane assembly is by multiple Rolling high temperature reverse osmosis membrane is monomer series-connected to be formed;The high temperature counter-infiltration system 6 is additionally provided with high temperature counter-infiltration system water inlet 61, High temperature counter-infiltration system water outlet 62 and the outer outlet 63 of concentrated water;The intermediate water tank 4 is equipped with intermediate water tank water inlet 41, intermediate Water outlet of water tank 42 and intermediate water tank backwash water outlet 43;The water outlet of the caching water tank 1 and the water inlet of water supply pump 2 It is connected;The water outlet of the water supply pump 2 is connected with the water intake 31 of high temperature ultrafiltration membrane system 3;The high temperature ultrafiltration membrane system The water outlet 32 of system 3 is connected with intermediate water tank water inlet 41;The water inlet phase of the intermediate water tank water outlet 42 and high-pressure pump 5 Even;The water outlet of the high-pressure pump 5 is connected with high temperature counter-infiltration system water inlet 61;The high temperature counter-infiltration system water outlet 62 It is connected with the water inlet of clear water water tank 7;The intermediate water tank backwash water outlet 43 is connected with the water inlet of backwashing pump 8;Institute The water outlet for stating backwashing pump 8 is connected with the backwash water inlet 33 of high temperature ultrafiltration membrane system 3.
Further, the membrane material of the rolling high temperature reverse osmosis membrane monomer is fully aromatic polyamide-urea.
Further, the aperture of the refractory ceramics tubular ultra-filtration membrane is 0.001 μm -0.1 μm.
Further, the outer outlet 63 of the concentrated water of the high temperature counter-infiltration system 6 connects external blowdown pipeline.,
Further, the outlet water outlet 34 of the high temperature ultrafiltration membrane system 3 connects exterior tubing.
Further, described device is backwashed by the way of periodic running, and periodically in the process of running.
The main component devices function of utility model device is as follows:
1) water tank 1 is cached: as balanced reservoir, primarily to downstream high temperature ultrafiltration system stable water supply;
2) water supply pump 2: the power for entering high temperature ultrafiltration membrane system is provided;
3) high temperature ultrafiltration membrane system 3: pretreatment hot industry waste water;
4) intermediate water tank 4: as balanced reservoir, primarily to downstream high temperature counter-infiltration system stable water supply;
5) high-pressure pump 5: the power for entering high temperature counter-infiltration system is provided;
6) high temperature counter-infiltration system 6: processing hot industry waste water generates clean water and is sent into clear water water tank, generates concentrated water and makees Enter sewage pipeline for discharge of wastewater;
7) clear water water tank 7: caching high temperature counter-infiltration system generates clear water;
8) waste water system the outer outlet 63 of the concentrated water of high temperature counter-infiltration system 6: is discharged into outside reverse osmosis concentrated water;
9) backwashing pump: power is provided for the online backwash of high temperature ultrafiltration system.
The import of 1 water outlet of water tank connection water supply pump 2, the outlet of water supply pump 2 connection high temperature ultrafiltration are cached in the utility model Film device import in film processing system, refractory ceramics ultrafiltration membrane is placed in film device side by side, and film device outlet connects intermediate water Case import, intermediate water tank outlet connection high temperature counter-infiltration system water supply pump inlet, water supply pump discharge connect high temperature counter-infiltration system Water inlet, several groups reverse osmosis membrane assembly, every group of reverse osmosis membrane assembly are several reverse osmosis membranes side by side in high temperature counter-infiltration system Monomer series-connected stroke, high temperature counter-infiltration system clear water output connect clear water water tank, and high temperature counter-infiltration system concentrated water outlet connection is outer Portion's blowdown pipeline.
Utility model device is run after a period of time, suspends water supply water supply pump 1, starts backwashing pump 8, super to high temperature Filter system carries out back flush.
The high temperature ultrafiltration membrane system method of operation of the utility model is dead-end filtration, timing backwash.
The utility model high temperature counter-infiltration system core is high temperature resistant ultrafiltration membrane, and membrane material is with fully aromatic polyamide-urea Based on.
The ultrafiltration membrane system method of operation uses water tank inlet-water supply pump 1- high temperature ultrafiltration membrane-centre water in the utility model The combination of case-backwashing pump 8.Considered based on cost of investment/operating cost, the method for operation uses periodic running, timing Backwash.High temperature lime set is sent into high temperature ultrafiltration membrane by water supply pump 1, and water outlet enters intermediate water tank and caches.Operation after a certain period of time, is adopted With pause water supply pump 1, start backwashing pump 8, produces water using high temperature ultrafiltration membrane, i.e. the water of intermediate water tank carries out high temperature ultrafiltration membrane Back flush, to guarantee the operating status of high temperature ultrafiltration membrane.
Utility model device to obtain clean water, and then is returned for handling the hot waste water generated in industrial production Use water.
Refractory ceramics tubular ultra-filtration membrane and coiled reverse osmosis membrane are used in the utility model, the former is high temperature inorganic Film, the latter are high temperature organic film, and refractory ceramics tubular ultra-filtration membrane has the characteristics that work under high temperature, can at high temperature oil removing, Except the performance of the mechanical admixtures such as iron, silicon, and acid and alkali-resistance;Coiled reverse osmosis membrane has metastable desalination at high operating temperatures Rate and resistance to acid and alkali.Due to design parameter of the film when handling high-temperature water, such as the salt rejection rate of film, the film surface flow velocity of water, film The selection of the materials such as pressure drop, the flow of inlet water of film, the cleaning method of film and putamina, pipeline and design of common film process etc. exist aobvious The difference of work.
Ultrafiltration membrane Ceramics film in the utility model has separative efficiency height, effect stability, chemical stability good, resistance to Soda acid, organic solvent-resistant, resistance to bacterium, high temperature resistant, antipollution, high mechanical strength, regenerability is good, separation process is simple, low energy consumption, Numerous advantages such as simple and convenient operation and maintenance, long service life.
Utility model device by high temperature lime set with being pumped to high temperature ultrafiltration system, to go oil emulsion etc. in water removal non-solvable Solution property organic matter (particle size range is greater than 0.1 μm) and metal oxide etc.;Then the production water of the first step is sent reverse osmosis to high temperature System further removes dissolubility oils or other inorganic pollutions in water removal, and the clear water of generation is then to produce water, can be used for ABS etc. The moisturizing of production technology.
High temperature lime set handled by utility model device is the steam condensate generated in ethylbenzene dehydrogenation technique, feature Are as follows: COD < 80.0mg/L;Oil content < 5.0mg/L;Conductivity < 50 μ s/cm;Total iron < 1.0mg/L;85 DEG C of temperature <.
The utility model the utility model has the advantages that
The utility model provides a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation, the device energy Hot industry waste water is enough effectively treated, reduces the pollutant load in hot industry waste water, and maintain it in higher temperature It under state, is recycled advantageous as high-temperature water, saves water resource, energy saving.The device is by using intermediate water tank As balanced reservoir, it can guarantee downstream high temperature counter-infiltration system stable water supply.
Detailed description of the invention
Fig. 1 the utility model structure diagram;
(1, cache water tank;2, water supply pump;3, high temperature ultrafiltration membrane system;31, water intake;32, water outlet;33, recoil Wash water inlet;34, outlet water outlet;4, intermediate water tank;41, intermediate water tank water inlet;42, intermediate water tank water outlet;43, it is intermediate Water tank backwashes water outlet;5, high-pressure pump;6, high temperature counter-infiltration system;61, high temperature counter-infiltration system water inlet;62, high temperature is anti- Osmosis system water outlet;63, the outer outlet of concentrated water;7, clear water water tank;8, backwashing pump).
Specific embodiment
The utility model is described further combined with specific embodiments below, following embodiment will be helpful to this field Technical staff further understands the utility model, but does not limit present embodiment in any form.
Embodiment is described with reference to Fig. 1, a kind of high temperature generated for handling Ethyl Benzene Dehydrogenation Plant of present embodiment The equipment of lime set, the processing unit include caching water tank 1, water supply pump 2, high temperature ultrafiltration membrane system 3, intermediate water tank 4, high-pressure pump 5, High temperature counter-infiltration system 6, clear water water tank 7 and backwashing pump 8;Wherein: being equipped with inside the high temperature ultrafiltration membrane system 3 and place side by side Multiple tubular type refractory ceramics ultrafiltration membranes;The high temperature ultrafiltration membrane system 3 is additionally provided with water intake 31, water outlet 32, instead Rinse water inlet 33 and outlet water outlet 34;The high temperature counter-infiltration system 6 includes multiple groups rolling high temperature reverse osmosis placed side by side Permeable membrane component, every group of rolling high temperature reverse osmosis membrane assembly are formed by multiple rolling high temperature reverse osmosis membranes are monomer series-connected;The high temperature Counter-infiltration system 6 is additionally provided with high temperature counter-infiltration system water inlet 61, high temperature counter-infiltration system water outlet 62 and the outer outlet of concentrated water 63;The intermediate water tank 4 is equipped with intermediate water tank water inlet 41, and intermediate water tank water outlet 42 and intermediate water tank backwash water outlet 43;The water outlet of the caching water tank 1 is connected with the water inlet of water supply pump 2;The water outlet and high temperature ultrafiltration membrane of the water supply pump 2 The water intake 31 of system 3 is connected;The water outlet 32 of the high temperature ultrafiltration membrane system 3 is connected with intermediate water tank water inlet 41; The intermediate water tank water outlet 42 is connected with the water inlet of high-pressure pump 5;The water outlet and high temperature counter-infiltration system of the high-pressure pump 5 Water inlet 61 is connected;The high temperature counter-infiltration system water outlet 62 is connected with the water inlet of clear water water tank 7;The intermediate water tank is anti- Water outlet 43 is rinsed to be connected with the water inlet of backwashing pump 8;The water outlet of the backwashing pump 8 and high temperature ultrafiltration membrane system 3 Backwash water inlet 33 is connected.
The membrane material of rolling high temperature reverse osmosis membrane monomer is fully aromatic polyamide-urea in present embodiment.
The aperture of refractory ceramics tubular ultra-filtration membrane is 0.001 μm -0.1 μm in present embodiment.
The outer outlet 63 of the concentrated water of present embodiment high temperature counter-infiltration system 6 connects external blowdown pipeline.,
The outlet water outlet 34 of present embodiment high temperature ultrafiltration membrane system 3 connects exterior tubing.
Device is backwashed by the way of periodic running, and periodically in the process of running in present embodiment.
The main component devices function of present embodiment device is as follows:
1) water tank 1 is cached: as balanced reservoir, primarily to downstream high temperature ultrafiltration system stable water supply;
2) water supply pump 2: the power for entering high temperature ultrafiltration membrane system is provided;
3) high temperature ultrafiltration membrane system 3: pretreatment hot industry waste water;
4) intermediate water tank 4: as balanced reservoir, primarily to downstream high temperature counter-infiltration system stable water supply;
5) high-pressure pump 5: the power for entering high temperature counter-infiltration system is provided;
6) high temperature counter-infiltration system 6: processing hot industry waste water generates clean water and is sent into clear water water tank, generates concentrated water and makees Enter sewage pipeline for discharge of wastewater;
7) clear water water tank 7: caching high temperature counter-infiltration system generates clear water;
8) waste water system the outer outlet 63 of the concentrated water of high temperature counter-infiltration system 6: is discharged into outside reverse osmosis concentrated water;
9) backwashing pump 8: power is provided for the online backwash of high temperature ultrafiltration system.
Present embodiment processing unit working principle:
Hot industry waste water enters caching water tank 1, stabilizing water quality and water, guarantees that upstream device continuously operates normally;Through High temperature ultrafiltration membrane system 3 is sent by water supply pump 2, includes ceramic super-filtering film in high temperature ultrafiltration membrane system 3, hot industry can be removed Partial contamination substance in waste water, treated, and hot industry waste water enters the caching of intermediate water tank 4, and stabilizing water quantity is downstream high temperature Counter-infiltration system provides progress;It is sent into high temperature counter-infiltration system 6 via high-pressure pump 5, high temperature counter-infiltration system 6 is provided with high temperature resistant Coiled reverse osmosis membrane, hot industry waste water pass through reverse osmosis membrane filtration, and clear water enters 7 clear water water tanks, concentrated water discharge;7 clear water water Water is finally produced in case for system.
The import of 1 water outlet of water tank connection water supply pump 2, the outlet of water supply pump 2 connection high temperature ultrafiltration are cached in present embodiment Film device import in film processing system, refractory ceramics ultrafiltration membrane is placed in film device side by side, and film device outlet connects intermediate water Case import, intermediate water tank outlet connection high temperature counter-infiltration system water supply pump inlet, water supply pump discharge connect high temperature counter-infiltration system Water inlet, several groups reverse osmosis membrane assembly, every group of reverse osmosis membrane assembly are several reverse osmosis membranes side by side in high temperature counter-infiltration system Monomer series-connected stroke, high temperature counter-infiltration system clear water output connect clear water water tank, and high temperature counter-infiltration system concentrated water outlet connection is outer Portion's blowdown pipeline.
Present embodiment device is run after a period of time, suspends water supply water supply pump 1, starts backwashing pump 8, super to high score Filter system carries out back flush.
Present embodiment device to obtain clean water, and then is returned for handling the hot waste water generated in industrial production Use water.Refractory ceramics tubular ultra-filtration membrane and coiled reverse osmosis membrane are used in present embodiment, the former is high temperature inorganic film, after Person is high temperature organic film, and refractory ceramics tubular ultra-filtration membrane has the characteristics that work under high temperature, can at high temperature oil removing, remove The performance of the mechanical admixtures such as iron, silicon, and acid and alkali-resistance;Coiled reverse osmosis membrane has metastable salt rejection rate at high operating temperatures And resistance to acid and alkali.Due to design parameter of the film when handling high-temperature water, such as the salt rejection rate of film, the pressure of the film surface flow velocity of water, film The selection of the materials such as drop, the flow of inlet water of film, the cleaning method of film and putamina, pipeline and design of common film process etc. exist significant Difference.
Ultrafiltration membrane Ceramics film in present embodiment has separative efficiency height, effect stability, chemical stability good, resistance to Soda acid, organic solvent-resistant, resistance to bacterium, high temperature resistant, antipollution, high mechanical strength, regenerability is good, separation process is simple, low energy consumption, Numerous advantages such as simple and convenient operation and maintenance, long service life.
The high temperature ultrafiltration membrane system method of operation of present embodiment is dead-end filtration, timing backwash.
The ultrafiltration membrane system method of operation uses water tank inlet-water supply pump 1- high temperature ultrafiltration membrane-centre water in present embodiment The combination of case-backwashing pump 8.Considered based on cost of investment/operating cost, the method for operation uses periodic running, timing Backwash.High temperature lime set is sent into high temperature ultrafiltration membrane by water supply pump 1, and water outlet enters intermediate water tank and caches.Operation after a certain period of time, is adopted With pause water supply pump 1, start backwashing pump 8, produces water using high temperature ultrafiltration membrane, i.e. the water of intermediate water tank carries out high temperature ultrafiltration membrane Back flush, to guarantee the operating status of high temperature ultrafiltration membrane.
Present embodiment device by high temperature lime set with being pumped to high temperature ultrafiltration system, to go oil emulsion etc. in water removal non-solvable Solution property organic matter (particle size range is greater than 0.1 μm) and metal oxide etc.;Then the production water of the first step is sent reverse osmosis to high temperature System further removes dissolubility oils or other inorganic pollutions in water removal, and the clear water of generation is then to produce water, can be used for ABS etc. The moisturizing of production technology.
High temperature lime set handled by present embodiment device is the steam condensate generated in ethylbenzene dehydrogenation technique, feature Are as follows: COD < 80.0mg/L;Oil content < 5.0mg/L;Conductivity < 50 μ s/cm;Total iron < 1.0mg/L;85 DEG C of temperature <.
Hot industry waste water can be effectively treated in present embodiment device, and the pollutant reduced in hot industry waste water contains Amount, and maintain it under higher state of temperature, it is recycled advantageous as high-temperature water, saves water resource, save energy Consumption.The device, as balanced reservoir, can guarantee downstream high temperature counter-infiltration system stable water supply by using intermediate water tank.
Although the utility model has been disclosed in the preferred embodiment as above, it is not intended to limit the utility model, and is appointed What person skilled in the art can do various changes and modification, therefore without departing from the spirit and scope of the utility model The protection scope of the utility model should subject to the definition of the claims.

Claims (6)

1. a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation, which is characterized in that the equipment includes slow Water tank (1), water supply pump (2), high temperature ultrafiltration membrane system (3), intermediate water tank (4), high-pressure pump (5), high temperature counter-infiltration system (6), clear water water tank (7) and backwashing pump (8);Wherein: being equipped with inside the high temperature ultrafiltration membrane system (3) placed side by side multiple Tubular type refractory ceramics ultrafiltration membrane;The high temperature ultrafiltration membrane system (3) is additionally provided with water intake (31), water outlet (32), instead Rinse water inlet (33) and outlet water outlet (34);The high temperature counter-infiltration system (6) includes that multiple groups rolling placed side by side is high Warm reverse osmosis membrane assembly, every group of rolling high temperature reverse osmosis membrane assembly are formed by multiple rolling high temperature reverse osmosis membranes are monomer series-connected;Institute State high temperature counter-infiltration system (6) and be additionally provided with high temperature counter-infiltration system water inlet (61), high temperature counter-infiltration system water outlet (62) and The outer outlet (63) of concentrated water;The intermediate water tank (4) be equipped with intermediate water tank water inlet (41), intermediate water tank water outlet (42) and in Between water tank backwash water outlet (43);The water outlet of caching water tank (1) is connected with the water inlet of water supply pump (2);The confession The water outlet of water pump (2) is connected with the water intake (31) of high temperature ultrafiltration membrane system (3);The high temperature ultrafiltration membrane system (3) Water outlet (32) be connected with intermediate water tank water inlet (41);The water inlet of the intermediate water tank water outlet (42) and high-pressure pump (5) Mouth is connected;The water outlet of the high-pressure pump (5) is connected with high temperature counter-infiltration system water inlet (61);The high temperature counter-infiltration system Water outlet (62) is connected with the water inlet of clear water water tank (7);Intermediate water tank backwash water outlet (43) and backwashing pump (8) Water inlet be connected;Backwash water inlet (33) phase of the water outlet of the backwashing pump (8) and high temperature ultrafiltration membrane system (3) Even.
2. a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation according to claim 1, feature It is, the membrane material of the rolling high temperature reverse osmosis membrane monomer is fully aromatic polyamide-urea.
3. a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation according to claim 1, feature It is, the aperture of the refractory ceramics tubular ultra-filtration membrane is 0.001 μm -0.1 μm.
4. a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation according to claim 1, feature It is, the outer outlet (63) of the concentrated water of the high temperature counter-infiltration system (6) connects external blowdown pipeline.
5. a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation according to claim 1, feature It is, the outlet water outlet (34) of the high temperature ultrafiltration membrane system (3) connects exterior tubing.
6. a kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation according to claim 1, feature It is, described device uses periodic running mode in the process of running, and timing backwashes.
CN201820425379.4U 2018-03-26 2018-03-26 A kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation Active CN208327559U (en)

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Application Number Priority Date Filing Date Title
CN201820425379.4U CN208327559U (en) 2018-03-26 2018-03-26 A kind of equipment for handling the high temperature lime set of Ethyl Benzene Dehydrogenation Plant generation

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115403113A (en) * 2022-11-02 2022-11-29 山东辰智电子科技有限公司 Sewage filtering device with switchable filtering components

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115403113A (en) * 2022-11-02 2022-11-29 山东辰智电子科技有限公司 Sewage filtering device with switchable filtering components

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