CN104129868B - The technique of wastewater treatment and reclamation set and processing waste water - Google Patents
The technique of wastewater treatment and reclamation set and processing waste water Download PDFInfo
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- CN104129868B CN104129868B CN201310158590.6A CN201310158590A CN104129868B CN 104129868 B CN104129868 B CN 104129868B CN 201310158590 A CN201310158590 A CN 201310158590A CN 104129868 B CN104129868 B CN 104129868B
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Abstract
The present invention relates to middle water reuse field, be specifically related to the technique of a kind of wastewater treatment and reclamation set and processing waste water, device comprises the drainage bin for holding waste water, the regulating reservoir being connected with described drainage bin delivery port, filter, the slag bath being connected with the bottom of a described filter, for the waste water in described regulating reservoir being extracted into once filtering liquid feeding pump and the slag slurry in described slag bath being delivered to the slag slurry delivery pump of described drainage bin in a described filter, described slag slurry delivery pump is connected with described drainage bin. It is large that the present invention has wastewater treatment capacity, and automaticity is high, and treatment effect is obvious, the advantage that operating cost is low.
Description
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 resource critical shortage, as water, draining rich and influential family's Thermal Power Enterprises, aspect the utilizing of water resource, 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 suspension, pH value, content of beary metal etc.; (3) Water Treatment waste water, accounts for 4%-6% of waste water total amount, and main pollution factor is solid suspension, pH value, content of beary metal and salt content 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, metal erosion in reuse process, therefore needs it to process normally reuse of rear, especially will reduce its solid suspension content and water hardness. At present, in industrial production, the conventional hardness processing method of falling mainly contains: (1) ion-exchange; (2) membrane separation process; (3) lime soda ash tenderizer; (4) add scale inhibition agent etc. These processing methods all have some limitations: 1, ion-exchange, and treating capacity is lower, and consumes the raw materials such as certain NaCl, and Na ion concentration in water body is raise, and salinity increases; 2, membrane separation process, film fouling is stopped up frequent, and treating capacity declines, and water use efficiency is low, and equipment 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 carbon dioxide, account for 60%. Thermal Power Enterprises, as a concentrated emission source of carbon dioxide, approximately contains carbon dioxide 13% left and right in the flue gas of its discharge. At present, the method of each Thermal Power Enterprises reducing emission of carbon dioxide is mainly from flue gas, to separate to reclaim carbon dioxide, separating the technology reclaiming mainly contains: absorption and separation method, adsorption method of separation, embrane method, low temperature distillation method etc., apply maximum still absorption and separation methods, the method is mainly using chemical solution as absorbent, and then separate, technological process complexity, operating cost is higher.
Summary of the invention
Technical problem to be solved by this invention is that existing middle water process for reclaiming treating capacity is little, investment cost is large, operating 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 treating capacity is large, automaticity is high, remove hardness successful, operating cost is low.
The present invention also provides a kind of waste water treatment process, and its treating capacity is large, and automaticity is high, removes hardness successful, and operating cost is low.
Wastewater treatment of the present invention and reclamation set, it comprises the drainage bin for holding waste water, the regulating reservoir being connected with described drainage bin delivery port, filter, the slag bath being connected with the bottom of a described filter, for the waste water in described regulating reservoir being extracted into the slag slurry delivery pump that once filtering liquid feeding pump and the slag slurry in described slag bath being delivered to described drainage bin in a described filter, described slag slurry delivery pump is connected with described drainage bin.
Preferably, described regulating reservoir is pH regulating reservoir.
Preferably, a described filter 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 drainage bin, carries out Separation of Solid and Liquid, lime-ash outward transport, clear liquid overflow after separation enters regulating reservoir, adds milk of lime and regulates the wastewater pH in regulating reservoir to make it be neutral, then delivers into filter No. one time by a filter pump, waste water clear liquid after a filter filters returns to punching ash, slag slurry enters slag bath, sends into drainage bin and again carries out Separation of Solid and Liquid, lime-ash outward transport with slag slurry delivery pump, 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 filter, air and liquid mixer, the liquid in described Buffer Pool is delivered to raw water pump, combined reaction pond in described air and liquid mixer, the reactant liquor in described combined reaction pond is inputted to the secondary filter liquid feeding pump in described aflter-fillter, and the air compressor being connected with industrial chimney, with the air accumulator that described air compressor is connected, described air accumulator be connected with described air and liquid mixer and delivery industry flue gas in described air and liquid mixer.
Preferably, described aflter-fillter is automatic back-washing surface filter.
Preferably, described air accumulator is pressure volume pot, and it is equipped with safety valve, residual cake valve.
Preferably, described air and liquid mixer is pressure vessel, is equipped with liquid level gauge, visor, and its 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 drainage bin and carries out preliminary Separation of Solid and Liquid, the clear liquid of deviating from flows into regulating reservoir, adding milk of lime regulates the pH value of waste water in regulating reservoir to be greater than 8.5, then deliver into filter No. one time by a filter pump, clear liquid overflow enters Buffer Pool, recycling raw water is pumped into air and liquid mixer, flue gas in industrial chimney enters air accumulator after compressing via air compressor, air accumulator is sent the flue gas of storage into air and 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, after reacting completely, filter through entered aflter-fillter by secondary filter liquid feeding pump, clear liquid direct reuse is in punching ash, filter the underflow producing and enter slag bath, return to drainage bin via slag slurry delivery pump and carry out Separation of Solid and Liquid, lime-ash outward transport, so repeatedly at least twice, complete the process of utilizing industrial smoke to process waste water.
The treating apparatus 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, selects corresponding equipment configuration according to the different processing water yields, 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 operating cost is low.
Utilize thermal power plant's flue 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 water money and recycle, on the other hand taking the carbon dioxide in flue gas as raw material, reduce the CO2 emissions of thermal power plant, existing environmental benefit, has again social benefit.
Brief description of the drawings
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, drainage bin 2, regulating reservoir 3, a filter liquid feeding pump
4, filter 5, slag bath 6, a slag are starched delivery pump
7, Buffer Pool 8, raw water pump 9, combined reaction pond
10, aflter-fillter liquid feeding pump 11, aflter-fillter 12, chimney
13, air compressor 14, air accumulator 15, air and liquid mixer
16, reaction tank 17, feed liquor Buffer Pool.
Detailed description of the invention
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, regulating reservoir that it comprises drainage bin 1 for holding waste water, be connected with described drainage bin 1 delivery port 2, filter 4, the slag bath 5 being connected with the bottom of a filter 4, for the waste water in regulating reservoir 2 being extracted into the slag slurry delivery pump 6 that once filtering liquid feeding pump 3 and the slag slurry in slag bath 5 being delivered to drainage bin 1 in a filter 4, slag slurry delivery pump 6 is connected with drainage bin 1. Regulating reservoir is pH regulating reservoir, by adding lime white to regulate pH value. No. one time filter 4 is automatic back-washing surface filter.
The present embodiment is mainly to remove the solid suspension rushing in grey waste water, technological process is: rush grey waste water and be introduced into and in drainage bin, carry out Separation of Solid and Liquid, lime-ash outward transport, clear liquid overflow after separation enters regulating reservoir, adding milk of lime regulates the wastewater pH in regulating reservoir to make it be neutral, then deliver into filter No. one time by a filter pump, waste water clear liquid after a filter filters returns to punching ash, slag slurry enters slag bath, send into drainage bin with slag slurry delivery pump and again carry out Separation of Solid and Liquid, lime-ash outward transport, so circulation at least twice, complete processing and the reuse of rushing grey waste water.
The present embodiment drainage bin is equipment for separating liquid from solid, and treating capacity is large.
Filter of the present embodiment is automatic back-washing surface filter, adopts surface filtration technology to hold back solid particle and suspension, can make the solid suspension in waste water again reduce, and clear liquid water outlet can reach SS≤20mg/l.
The operation principle of filter and aflter-fillter is: the solid particle in waste water and suspension are retained down gradually by the filter membrane of filter, while just beginning, the tiny suspension 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 regulating reservoir, along with solid suspension 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, along with the increase of 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, assemble to filter conical lower portion, enter slag bath, complete thus filtration.
Embodiment 2:
Wastewater treatment of the present invention and reclamation set, as shown in Figure 2, regulating reservoir that it comprises drainage bin 1 for holding waste water, be connected with drainage bin 1 delivery port 2, filter 4, aflter-fillter 11, the slag bath 5 being connected with the bottom of filter 4 and aflter-fillter 11, for the waste water in regulating reservoir 2 being extracted into the slag slurry delivery pump 6 that once filtering liquid feeding pump 3 and the slag slurry in slag bath 5 being delivered to drainage bin 1 in a filter 4, slag slurry delivery pump 6 is connected with drainage bin 1. Regulating reservoir 2 is PH regulating reservoir, and No. one time filter 4 is automatic back-washing surface filter.
Also comprise the Buffer Pool 7 that is connected with the clear liquid mouth of a filter 4, air and liquid mixer 15, by the liquid in Buffer Pool 7 deliver to raw water pump 8 in air and liquid mixer 15, combined reaction pond 9, by the secondary filter liquid feeding pump 10 in the reactant liquor input aflter-fillter 11 in combined reaction pond 9, and the air compressor 13 being connected with industrial chimney 12, the air accumulator 14 that is connected with air compressor 13, air accumulator 14 be connected with air and liquid mixer 15 and delivery industry flue gas in air and liquid mixer 15. Combined reaction pond 9 comprises reaction tank 16 and feed liquor Buffer Pool 17.
Aflter-fillter 11 is automatic back-washing surface filter, because its filtering accuracy is high, can greatly improve hardness clearance, can ensure the cleannes of recycle-water simultaneously. Experiment showed, by secondary filter lower than the water hardness of common precipitation. Air accumulator 14 is pressure volume pot, and it is equipped with the parts such as safety valve, residual cake valve. Air and liquid mixer 15 is pressure vessel, is equipped with liquid level gauge, visor, and its inlet is installed Venturi tube.
The present embodiment is the solid suspension of removing in waste water on the one hand, to utilize coal steam-electric plant smoke to reduce water hardness on the other hand, technological process is: rush grey waste water and enter drainage bin and carry out preliminary Separation of Solid and Liquid, the clear liquid of deviating from flows into regulating reservoir, adding milk of lime regulates the pH value of waste water in regulating reservoir to be greater than 8.5, then deliver into filter No. one time by a filter pump, clear liquid overflow enters Buffer Pool, recycling raw water is pumped into air and liquid mixer, flue gas in industrial chimney enters air accumulator after compressing via air compressor, air accumulator is sent the flue gas of storage into air and 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, after reacting completely, filter through entered aflter-fillter by secondary filter liquid feeding pump, clear liquid direct reuse is in punching ash, filter the underflow producing and enter slag bath, return to drainage bin via slag slurry delivery pump and carry out Separation of Solid and Liquid, 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 carbon dioxide to fall water hardness, under alkali condition, the acid group calcium ions and magnesium ions solubility of dissolving in waste water reduces, part calcium ions and magnesium ions is separated out, form precipitation, by an isolated by filtration, 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 carbon dioxide 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 treating apparatus 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 is not very large, can be used as to rush in grey process, to lose supplementing of the water yield after it is processed.
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 (8)
1. wastewater treatment and a reclamation set, is characterized in that:
Comprise the drainage bin (1) for holding waste water, the regulating reservoir (2) being connected with described drainage bin (1) delivery port, a filter (4), the slag bath (5) being connected with the bottom of a described filter (4), for the waste water in described regulating reservoir (2) being extracted into the once filtration liquid feeding pump (3) in a described filter (4) and the slag slurry in described slag bath (5) being delivered to the slag slurry delivery pump (6) of described drainage bin (1), described slag slurry delivery pump (6) is connected with described drainage bin (1);
Also comprise the Buffer Pool (7) being connected with the clear liquid mouth of a described filter (4), air and liquid mixer (15), liquid in described Buffer Pool (7) is delivered to the raw water pump (8) in described air and liquid mixer (15), combined reaction pond (9), by the secondary filter liquid feeding pump (10) in the reactant liquor input aflter-fillter (11) in described combined reaction pond (9), and the air compressor (13) being connected with industrial chimney (12), the air accumulator (14) being connected with described air compressor (13), described air accumulator (14) is connected with described air and liquid mixer (15) and delivery industry flue gas arrives in described air and liquid mixer (15).
2. wastewater treatment and reclamation set according to claim 1, is characterized in that:
Described aflter-fillter (11) is automatic back-washing surface filter.
3. wastewater treatment and reclamation set according to claim 1, is characterized in that:
Described air accumulator (14) is pressure volume pot, and it is equipped with safety valve, residual cake valve.
4. wastewater treatment and reclamation set according to claim 1, is characterized in that:
Described air and liquid mixer (15) is pressure vessel, is equipped with liquid level gauge, visor, and its inlet is installed Venturi tube.
5. wastewater treatment and reclamation set according to claim 1, is characterized in that:
Described combined reaction pond (9) comprises reaction tank (16) and feed liquor Buffer Pool (17).
6. wastewater treatment and reclamation set according to claim 1, is characterized in that:
Described regulating reservoir (2) is pH regulating reservoir.
7. wastewater treatment and reclamation set according to claim 1, is characterized in that:
A described filter (4) is automatic back-washing surface filter.
8. utilize wastewater treatment and reclamation set described in claim 1 ~ 5 any one to process a technique for waste water, it is characterized in that, comprise the steps:
Rushing grey waste water enters drainage bin (1) and carries out preliminary Separation of Solid and Liquid, the clear liquid of deviating from flows into regulating reservoir (2), adding milk of lime regulates the pH value of waste water in regulating reservoir (2) to be greater than 8.5, then deliver into a filter (4) by a filter pump (3), clear liquid overflow enters Buffer Pool (7), recycling raw water pump (8) is sent into air and liquid mixer (15), flue gas in industrial chimney (12) enters air accumulator (14) after compressing via air compressor (13), air accumulator (14) is sent the flue gas of storage into air and 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, after reacting completely, filter through entered aflter-fillter (11) by secondary filter liquid feeding pump (10), clear liquid direct reuse is in punching ash, filter the underflow producing and enter slag bath (5), return to drainage bin (1) via slag slurry delivery pump (6) and carry out Separation of Solid and Liquid, lime-ash outward transport, so repeatedly at least twice, complete the process of utilizing industrial smoke to process waste water.
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| 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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Effective date of registration: 20170424 Address after: 710043 Shaanxi province Xi'an Beilin District torch Road No. 4 B511 Patentee after: Shaanxi Yu Yu Technology Development Co., Ltd. Address before: Xianyang City, Shaanxi province 710043 Zheng Jie, Sanyuan County Chengguan town of South Gate No. 100 Patentee before: Wang Yanjun |