CN104129868A - Wastewater treatment and recycling device and wastewater treatment technology - Google Patents

Wastewater treatment and recycling device and wastewater treatment technology Download PDF

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Publication number
CN104129868A
CN104129868A CN201310158590.6A CN201310158590A CN104129868A CN 104129868 A CN104129868 A CN 104129868A CN 201310158590 A CN201310158590 A CN 201310158590A CN 104129868 A CN104129868 A CN 104129868A
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waste water
gas
wastewater treatment
liquid
strainer
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CN201310158590.6A
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CN104129868B (en
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王延军
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Shaanxi Yu Yu Technology Development Co., Ltd.
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王延军
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Abstract

The invention relates to the field of reclaimed water recycling and particularly relates to a wastewater treatment and recycling device and a wastewater treatment technology. The device includes a dewatering tank used for accommodating wastewater, an regulating tank connected to a water outlet of the dewatering tank, a primary filter, a residue tank connected to the bottom of the first filter, a primary filtering liquid-inlet pump used for pumping the wastewater in the regulating tank into the primary filter, and a residue slurry transporting pump used for transporting residue slurry in the residue tank to the dewatering tank. The residue slurry transporting pump is connected to the dewatering tank. The device is large in wastewater treatment amount, is high in automatic degree, is obvious in treatment effect and is low in operation cost.

Description

The technique of wastewater treatment and reclamation set and processing waste water
Technical field
The present invention relates to middle water reuse field, relate in particular to the technique of a kind of wastewater treatment and reclamation set and processing waste water.
Background technology
Current, water resources critical shortage, as water, draining rich and influential family's Thermal Power Enterprises, aspect the utilizing of water resources, is more and more subject to the strict control of environmental administration, how to implement waste water treatment and recycling, becomes the urgent task that Present Thermal Power enterprise faces.The waste water that Thermal Power Enterprises produces mainly contains: (1) condenser cooling water, account for 25%-45% of waste water total amount, and change of water quality is little, is mainly thermal pollution; (2) rush grey waste water, account for 40%-50% of waste water total amount, main pollution factor is suspended substance, pH value, heavy metal content etc.; (3) Water Treatment waste water, accounts for 4%-6% of waste water total amount, and main pollution factor is suspended solid, pH value, heavy metal content and saltiness etc.If this part waste water can be processed and in addition reuse, can fundamentally solve the problem of water and draining, the present invention mainly processes also in addition reuse by rushing grey waste water and Water Treatment waste water.
But waste water because there are various pollution factors, easily causes the problems such as fouling, dirt, metallic corrosion in reuse process, therefore need process normally reuse of rear to it, especially to reduce its solid suspension content and water hardness.At present, in industrial production, the conventional hardness treatment process of falling mainly contains: (1) ion exchange method; (2) membrane separation process; (3) lime soda ash tenderizer; (4) add scale inhibition agent etc.These treatment processs all have some limitations: 1, ion exchange method, and treatment capacity is lower, and consumes certain raw materials such as NaCl, and Na ion concentration in water body is raise, and salinity increases; 2, membrane separation process, film fouling is stopped up frequent, and treatment capacity declines, and water use efficiency is low, and facility investment expense is high, and power consumption is large; 3, lime-soda process, reagent consumption amount is large, sediment weight is large, and in water body, Na ion concentration raises, and salinity increases; 4, add after scale inhibition agent, water body has been introduced to other pollution factor, and scale inhibition agent is expensive, cost is higher.
Current, global climate warms gradually, be mainly to cause by discharged a large amount of greenhouse gases in atmosphere, and wherein topmost greenhouse gases is carbonic acid gas, account for 60%.Thermal Power Enterprises, as a concentrated emission source of carbonic acid gas, approximately contains carbonic acid gas 13% left and right in the stack gas of its discharge.At present, the method of each Thermal Power Enterprises reducing emission of carbon dioxide is mainly Separation and Recovery carbonic acid gas from flue gas, the technology of Separation and Recovery mainly contains: absorption extraction method, adsorption method of separation, embrane method, low-temperature distillation method etc., apply maximum still absorption extraction methods, the method is mainly to using chemical solution as absorption agent, and then carry out separation, and technical process is complicated, and running cost is higher.
Summary of the invention
Technical problem to be solved by this invention is that existing middle water process for reclaiming treatment capacity is little, investment cost is large, running cost is high, introduce the problems such as other foreign ions in water body, a kind of wastewater treatment and reclamation set are provided, its treatment capacity is large, level of automation is high, remove hardness successful, running cost is low.
The present invention also provides a kind of waste water treatment process, and its treatment capacity is large, and level of automation is high, removes hardness successful, and running cost is low.
Wastewater treatment of the present invention and reclamation set, it comprises the dewatering bunker for holding waste water, the equalizing tank being connected with described dewatering bunker water outlet, strainer, the slag bath being connected with the bottom of a described strainer, for the waste water in described equalizing tank being extracted into the slag slurry transferpump that once filtering liquid feeding pump and the slag slurry in described slag bath being delivered to described dewatering bunker in a described strainer, described slag slurry transferpump is connected with described dewatering bunker.
Preferably, described equalizing tank is PH equalizing tank.
Preferably, a described strainer is automatic back-washing surface filter.
Utilize described wastewater treatment and reclamation set to process a technique for waste water, comprise the steps:
Rushing grey waste water is introduced into and in dewatering bunker, carries out solid-liquid separation, lime-ash outward transport, clear liquid overflow after separation enters equalizing tank, adds milk of lime and regulates the wastewater pH in equalizing tank to make it be neutral, then by a filtration pump, delivers into strainer No. one time, waste water clear liquid after a strainer filters returns to punching ash, slag slurry enters slag bath, sends into dewatering bunker and again carries out solid-liquid separation, lime-ash outward transport with slag slurry transferpump, so circulation at least twice, completes processing and the reuse of rushing grey waste water.
To being further improved to of technique scheme, also comprise the Buffer Pool that is connected with the clear liquid mouth of a described strainer, gas liquid mixer, the liquid in described Buffer Pool is delivered to raw water pump, combined reaction pond in described gas liquid mixer, the reaction solution in described combined reaction pond is inputted to the secondary filtration liquid feeding pump in described secondary filter, and the air compressor being connected with industrial chimney, with the gas-holder that described air compressor is connected, described gas-holder be connected with described gas liquid mixer and delivery industry flue gas in described gas liquid mixer.
Preferably, described secondary filter is automatic back-washing surface filter.
Preferably, described gas-holder is pressure volume pot, and it is equipped with safety valve, residual cake valve.
Preferably, described gas liquid mixer is pressurized vessel, is equipped with liquidometer, visor, and its fluid inlet is installed Venturi tube.
Preferably, described combined reaction pond comprises reaction tank and feed liquor Buffer Pool.
Utilize described wastewater treatment and reclamation set to process a technique for waste water, it comprises the steps:
Rushing grey waste water enters dewatering bunker and carries out preliminary solid-liquid separation, the clear liquid of deviating from flows into equalizing tank, adding milk of lime regulates the waste water ph in equalizing tank to be greater than 8.5, then by a filtration pump, deliver into strainer No. one time, clear liquid overflow enters Buffer Pool, recycling raw water is pumped into gas liquid mixer, flue gas in industrial chimney enters gas-holder after compressing via air compressor, gas-holder is sent the flue gas of storage into gas liquid mixer, flue gas and waste water and clear liquid enter after overflowing and fully mixing and enter reaction tank continuation after the feed liquor Buffer Pool buffering in combined reaction pond and react, react completely and filter by entering secondary filter by secondary filtration liquid feeding pump, clear liquid direct reuse is in punching ash, filter the underflow producing and enter slag bath, via slag slurry transferpump, return to dewatering bunker and carry out solid-liquid separation, lime-ash outward transport, so repeatedly at least twice, complete the process of utilizing industrial smoke to process waste water.
The treatment unit of waste water of the present invention and reuse and treatment process, beneficial effect is:
Device adapts to the processing of the various water yields, according to the different processing water yields, selects corresponding equipment configuration, without increasing number of devices, for processing compared with the system less expensive of big yield.
The raw material that device consumes is mainly waste residue, waste gas, economic environmental protection, and running cost is low.
Utilize thermal power plant's stack gas to process waste water nearby, realize the object of " treatment of wastes with processes of wastes against one another ", reduce on the one hand wastewater discharge, realize the recycle of water money, the carbonic acid gas of take on the other hand in stack gas is raw material, reduces the CO2 emissions of thermal power plant, existing environmental benefit, has again social benefit.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the embodiment of the present invention 1 wastewater treatment and reclamation set;
Accompanying drawing 2 is the structural representation of the embodiment of the present invention 2 wastewater treatments and reclamation set;
Wherein:
1, dewatering bunker 2, equalizing tank 3, a strainer liquid feeding pump
4, strainer 5, slag bath 6, a slag are starched transferpump
7, Buffer Pool 8, raw water pump 9, combined reaction pond
10, secondary filter liquid feeding pump 11, secondary filter 12, chimney
13, air compressor 14, gas-holder 15, gas liquid mixer
16, reaction tank 17, feed liquor Buffer Pool.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
Embodiment 1:
Wastewater treatment of the present invention and reclamation set, as shown in Figure 1, equalizing tank that it comprises dewatering bunker 1 for holding waste water, be connected with described dewatering bunker 1 water outlet 2, strainer 4, the slag bath 5 being connected with the bottom of a strainer 4, for the waste water in equalizing tank 2 being extracted into the slag slurry transferpump 6 that once filtering liquid feeding pump 3 and the slag slurry in slag bath 5 being delivered to dewatering bunker 1 in a strainer 4, slag slurry transferpump 6 is connected with dewatering bunker 1.Equalizing tank is pH regulator pond, by adding lime white to regulate pH value.No. one time strainer 4 is automatic back-washing surface filter.
The present embodiment is mainly to remove to rush the suspended solid in grey waste water, technical process is: rush grey waste water and be introduced into and in dewatering bunker, carry out solid-liquid separation, lime-ash outward transport, clear liquid overflow after separation enters equalizing tank, adding milk of lime regulates the wastewater pH in equalizing tank to make it be neutral, then by a filtration pump, deliver into strainer No. one time, waste water clear liquid after a strainer filters returns to punching ash, slag slurry enters slag bath, with slag slurry transferpump, send into dewatering bunker and again carry out solid-liquid separation, lime-ash outward transport, so circulation at least twice, complete processing and the reuse of rushing grey waste water.
The present embodiment dewatering bunker is equipment for separating liquid from solid, and treatment capacity is large.
Strainer of the present embodiment is automatic back-washing surface filter, adopts surface filtration technology to hold back solid particulate and suspended substance, can make the suspended solid in waste water again reduce, and clear liquid water outlet can reach SS≤20mg/l.
The principle of work of strainer and secondary filter is: the solid particulate in waste water and suspended substance are retained down gradually by the filter membrane of strainer, while just starting, the tiny suspended substance of part can pass filter membrane, cause water outlet SS to be difficult to reach requirement, opening clear liquid refluxes, make this part water return to equalizing tank, along with suspended solid forms filter cake on filter membrane surface, the SS content of water outlet is more and more lower, until limpid, closing clear liquid refluxes, limpid filtrate flows into next process certainly from clear liquid mouth, increase along with filter cake thickness, filter pressure raises gradually, reach after a threshold value, start recoil and deslagging program, filter cake is under the gravity recoil effect of part filtrate, depart from filter membrane surface, to strainer conical lower portion, assemble, enter slag bath, complete thus filtration.
Embodiment 2:
Wastewater treatment of the present invention and reclamation set, as shown in Figure 2, equalizing tank that it comprises dewatering bunker 1 for holding waste water, be connected with dewatering bunker 1 water outlet 2, strainer 4, secondary filter 11, the slag bath 5 being connected with the bottom of strainer 4 and secondary filter 11, for the waste water in equalizing tank 2 being extracted into the slag slurry transferpump 6 that once filtering liquid feeding pump 3 and the slag slurry in slag bath 5 being delivered to dewatering bunker 1 in a strainer 4, slag slurry transferpump 6 is connected with dewatering bunker 1.Equalizing tank 2 is PH equalizing tank, and No. one time strainer 4 is automatic back-washing surface filter.
Also comprise the Buffer Pool 7 that is connected with the clear liquid mouth of a strainer 4, gas liquid mixer 15, by the liquid in Buffer Pool 7 deliver to raw water pump 8 in gas liquid mixer 15, combined reaction pond 9, by the secondary filtration liquid feeding pump 10 in the reaction solution input secondary filter 11 in combined reaction pond 9, and the air compressor 13 being connected with industrial chimney 12, the gas-holder 14 that is connected with air compressor 13, gas-holder 14 be connected with gas liquid mixer 15 and delivery industry flue gas in gas liquid mixer 15.Combined reaction pond 9 comprises reaction tank 16 and feed liquor Buffer Pool 17.
Secondary filter 11 is automatic back-washing surface filter, because its filtering accuracy is high, can greatly improve hardness clearance, can guarantee the degree of cleaning of reuse water simultaneously.Experiment showed, by secondary filter lower than the water hardness of common precipitation.Gas-holder 14 is pressure volume pot, and it is equipped with the parts such as safety valve, residual cake valve.Gas liquid mixer 15 is pressurized vessel, is equipped with liquidometer, visor, and its fluid inlet is installed Venturi tube.
The present embodiment is the suspended solid of removing in waste water on the one hand, to utilize coal steam-electric plant smoke to reduce water hardness on the other hand, technical process is: rush grey waste water and enter dewatering bunker and carry out preliminary solid-liquid separation, the clear liquid of deviating from flows into equalizing tank, adding milk of lime regulates the waste water ph in equalizing tank to be greater than 8.5, then by a filtration pump, deliver into strainer No. one time, clear liquid overflow enters Buffer Pool, recycling raw water is pumped into gas liquid mixer, flue gas in industrial chimney enters gas-holder after compressing via air compressor, gas-holder is sent the flue gas of storage into gas liquid mixer, flue gas and waste water and clear liquid enter after overflowing and fully mixing and enter reaction tank continuation after the feed liquor Buffer Pool buffering in combined reaction pond and react, react completely and filter by entering secondary filter by secondary filtration liquid feeding pump, clear liquid direct reuse is in punching ash, filter the underflow producing and enter slag bath, via slag slurry transferpump, return to dewatering bunker and carry out solid-liquid separation, lime-ash outward transport, so repeatedly at least twice, complete the process of utilizing industrial smoke to process waste water.
Embodiment 2 is the improvement on embodiment 1 basis, the main principle of using carbonic acid gas to fall water hardness, under alkaline condition, the acid group calcium ions and magnesium ions solubleness of dissolving in waste water reduces, part calcium ions and magnesium ions is separated out, form precipitation, by a filtering separation, this part hardness is removed, and because waste water is alkalescence, the calcium hydroxide wherein dissolving is more, again by the calcium hydroxide reaction of solubility in the carbonic acid gas in flue gas and waste water, form precipitation of calcium carbonate, through filtration again, reach the object that continues to reduce water hardness.
Embodiment 3:
The present embodiment is the expanded application of embodiment 2, its treatment unit is identical with embodiment 2, be mainly the Water Treatment waste water that produces based on thermal power plant with to rush grey waste water quality basic identical, and its water yield not very large, after it is processed, can be used as to rush and in grey process, lose supplementing of the water yield.
Be more than the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims (10)

1. wastewater treatment and a reclamation set, is characterized in that:
Comprise the dewatering bunker (1) for holding waste water, the equalizing tank (2) being connected with described dewatering bunker (1) water outlet, a strainer (4), the slag bath (5) being connected with the bottom of a described strainer (4), the slag slurry transferpump (6) for the waste water in described equalizing tank (2) being extracted into the once filtration liquid feeding pump (3) in a described strainer (4) and the slag slurry in described slag bath (5) being delivered to described dewatering bunker (1), described slag slurry transferpump (6) is connected with described dewatering bunker (1).
2. wastewater treatment and reclamation set according to claim 1, is characterized in that:
Also comprise the Buffer Pool (7) being connected with the clear liquid mouth of a described strainer (4), gas liquid mixer (15), liquid in described Buffer Pool (7) is delivered to the raw water pump (8) in described gas liquid mixer (15), combined reaction pond (9), reaction solution in described combined reaction pond (9) is inputted to the secondary filtration liquid feeding pump (10) in described secondary filter (11), and the air compressor (13) being connected with industrial chimney (12), the gas-holder (14) being connected with described air compressor (13), described gas-holder (14) is connected with described gas liquid mixer (15) and delivery industry flue gas arrives in described gas liquid mixer (15).
3. wastewater treatment and reclamation set according to claim 2, is characterized in that:
Described secondary filter (11) is automatic back-washing surface filter.
4. wastewater treatment and reclamation set according to claim 2, is characterized in that:
Described gas-holder (14) is pressure volume pot, and it is equipped with safety valve, residual cake valve.
5. wastewater treatment and reclamation set according to claim 2, is characterized in that:
Described gas liquid mixer (15) is pressurized vessel, is equipped with liquidometer, visor, and its fluid inlet is installed Venturi tube.
6. wastewater treatment and reclamation set according to claim 2, is characterized in that:
Described combined reaction pond (9) comprises reaction tank (16) and feed liquor Buffer Pool (17).
7. wastewater treatment and reclamation set according to claim 1, is characterized in that:
Described equalizing tank (2) is PH equalizing tank.
8. wastewater treatment and reclamation set according to claim 1, is characterized in that:
A described strainer (4) is automatic back-washing surface filter.
9. utilize wastewater treatment and reclamation set described in claim 1 to process a technique for waste water, it is characterized in that, comprise the steps:
Rushing grey waste water is introduced in dewatering bunker (1) and carries out solid-liquid separation, lime-ash outward transport, clear liquid overflow after separation enters equalizing tank (2), adding milk of lime regulates the wastewater pH in equalizing tank (2) to make it be neutral, then by a filtration pump (3), deliver into a strainer (4), waste water clear liquid after a strainer (4) filters returns to punching ash, slag slurry enters slag bath (5), with slag, starching transferpump (6) sends into dewatering bunker (1) and again carries out solid-liquid separation, lime-ash outward transport, so circulation at least twice, completes processing and the reuse of rushing grey waste water.
10. utilize wastewater treatment and reclamation set described in claim 2 ~ 6 any one to process a technique for waste water, it is characterized in that, comprise the steps:
Rushing grey waste water enters dewatering bunker (1) and carries out preliminary solid-liquid separation, the clear liquid of deviating from flows into equalizing tank (2), adding milk of lime regulates the waste water ph in equalizing tank (2) to be greater than 8.5, then by a filtration pump (3), deliver into a strainer (4), clear liquid overflow enters Buffer Pool (7), recycling raw water pump (8) is sent into gas liquid mixer (15), flue gas in industrial chimney (12) enters gas-holder (14) after compressing via air compressor (13), gas-holder (14) is sent the flue gas of storage into gas liquid mixer (15), flue gas and waste water and clear liquid enter after overflowing and fully mixing and enter reaction tank (16) continuation after feed liquor Buffer Pool (17) buffering in combined reaction pond (9) and react, react completely and filter by entered secondary filter (11) by secondary filtration liquid feeding pump (10), clear liquid direct reuse is in punching ash, filter the underflow producing and enter slag bath (5), via slag slurry transferpump (6), return to dewatering bunker (1) and carry out solid-liquid separation, lime-ash outward transport, so repeatedly at least twice, complete the process of utilizing industrial smoke to process waste water.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104787738A (en) * 2015-04-29 2015-07-22 瓮福(集团)有限责任公司 Purification method of dilute acid in wet-process phosphoric acid production
CN106430676A (en) * 2016-10-11 2017-02-22 机械工业仪器仪表综合技术经济研究所 Green water-saving inspection and detection laboratory

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CN1623936A (en) * 2004-10-26 2005-06-08 南京工业大学 Technology for recovering ash water of coal-fired power plant and system of sealing circulating for recovering thereof
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN106430676A (en) * 2016-10-11 2017-02-22 机械工业仪器仪表综合技术经济研究所 Green water-saving inspection and detection laboratory

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