CN101089278A

CN101089278A - Process for recovery and using sewage of wash house

Info

Publication number: CN101089278A
Application number: CNA200610092994XA
Authority: CN
Inventors: 王歌德
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-12
Filing date: 2006-06-12
Publication date: 2007-12-19

Abstract

The present invention discloses a laundry sewage recovery and reutilization process. It is characterized by that said process adopts inorganic ceramic membrane separation technique and dynamic cross-flowing filtration mode to implement heat energy recovery, sewage recovery and detergent recovery so as to make the laundry sewage be changed into useful resource.

Description

Process for recovery and using sewage of wash house

Affiliated technical field

The present invention relates to a kind of improvement of process for recovery and using sewage of wash house, its applicable and railway, hotel, hotel, hospital, the laundry of Saunas or laundry in the society.

Technical background

Because the laundry industry is a kind of water consumption, the high industry of power consumption, along with developing rapidly of laundry, the sewage of laundry discharging increases day by day, its cost is high always, therefore there is the people to propose the improvement project of correlation technique, for example, Chinese patent CN200510029068.3 number about proposing following steps in " railway wash water recovery and utilization method ": (1), laundry wash water enter anaerobic fixed film reactor after removing suspended matter in the sewage through grid; (2), the water outlet by grid enters the anaerobic hydrolysis-acidification pond, acidifying becomes small organic molecule to anaerobic activated sludge with hydrolysis of organic matter with big molecule L AS in the sewage, water outlet enters membrane bioreactor; (3), after the water outlet in anaerobic hydrolysis-acidification pond enters membrane bioreactor, the small organic molecule exhaustive oxidation that aerobic activated sludge forms the hydrolysis acidification stage becomes carbon dioxide and water, the material permeance film of holding back diameter less than film forms clear water, and clear water obtains reuse.This sewage reclaiming method is effective, but the technology more complicated, cost is also than higher.

Summary of the invention

Task of the present invention is that a kind of process for recovery and using sewage of wash house will be provided, adopt this technology can accomplish energy recovery, water reclaims and washing agent reclaims, wash water is carried out recycling treatment, reach laundry cleaner production and purpose energy-conservation, that economize on water, save washing agent, its technology advanced person, equipment manufacturing cost is low, applied range is specially adapted to the railway washing.

Task of the present invention is finished in such a way, according to the pre-wash water of doing washing, the water analysis of washings, this sewage main feature is that pollutant levels are low, contain organic matters, SS and basicity, be alkalescent, certain water temperature is arranged, therefore determine to adopt the ceramic membrane ultrafitration mode, be about to pre-wash water in the washing machine, washings are transported in the circulation water pot, deliver to the ceramic membrane filter system by pump pressure again, macromolecular substances or solid particle tunicle are held back, reach and separate the purpose that concentrates with purifying, the condensed water that forms in the ceramic membrane filter system is discharged away, the recycle-water of purifying flows into intermediate water tank, be transported to pump again and go in the washing machine to recycle, because recycle-water is through the ceramic membrane filter system handles, be a pure physical action, do not add any other chemical substance in the whole filter process, just the SS in the sewage etc. is held back, do not influence calcium ions and magnesium ions concentration in the water, therefore recycle-water can be used for prewashing fully, washing, operations such as bleaching and first pass rinsing can satisfy the washing requirement, reach the purpose of wash water resource; And ceramic membrane is a kind of milipore filter, to basicity and washing agent without any crown_interception, basicity and washing agent can enter washing process with recycle-water, can reduce adding of washing procedure basicity and washing agent, the cost expenditure of basicity and washing agent reaches the recovery of washing agent and basicity in the saving washing process; The temperature of recycle-water can reach 43.6 degrees centigrade, exceeds 23.6 degrees centigrade than 20 degrees centigrade of running water temperature, and the heat energy of this part enters washing process with recycle-water, reduces steam consumption, reaches the effect of energy recovery.

Description of drawings

Below will the present invention is further illustrated by accompanying drawing.

Fig. 1 is a process for recovery and using sewage of wash house flow chart of the present invention.

The specific embodiment

From the process chart of Fig. 1 as can be known, this process for recovery and using sewage of wash house is to enter in the washing machine prewashing or add that washing agent washs as washings by running water, then with these pre-wash waters, washings are transported in the circulation water pot and go, by pump pressure the pre-wash water in the circulation water pot, washings are delivered in the ceramic membrane filter system and are filtered, the Inorganic Ceramic Membranes of using is based on the sieve effect of porous ceramics medium and the separating substances technology of carrying out, it is to adopt dynamic cross-flow filtration mode, promptly under the driving of pressure, material liquid at film pipe internal membrane laminar surface with certain flow velocity flow at high speed, small-molecule substance (liquid) along in vertical direction see through microporous barrier, and macromolecular substances or solid particle tunicle are held back, fluid is reached separate the purpose that concentrates with purifying, the condensed water that the ceramic membrane filter system forms is discharged away, some liquid still can be got back in the circulation water pot, and after the liquid by membrane filtration enters intermediate water tank, go by defeated the getting back in the washing machine of pump again, as pre-wash water, washings, bleaching water or washings use for the first time.

The inorganic ceramic membrane that is based upon on the inorganic material basis has the incomparable advantage of polymer separation film, its anti-height Temperature can realize sterilization system on line, and chemical stability is good, and the antimicrobial degraded of energy is for organic solvent, etchant gas and little life The stability that thing corrosion performance is good, it also has the mechanical strength height, and is high pressure resistant, have good wear-resisting, flushing resistance, Pore-size distribution is narrow, and separating property is good, and infiltration capacity is big, cleaning and regeneration repeatedly, and long service life is so the laundry washing is dirty The recycling of water resource reuse is feasible, and under the prerequisite that does not affect clean result, it can also be accomplished: by ceramic membrane to washing dirt Water filters reuse, can save the running water about 70%, and the discharge capacity of decrease waste water also reduces sewage disposal The operating load of equipment, easier sewage disposal and the qualified discharge of carrying out, have in the recycle-water certain temperature and a large amount of basicity, Washing agent can reduce the steam consumption quantity of heated scrub, reduces adding of washing agent, reaches the Cost reduction expenditure.

Claims

1, a kind of process for recovery and using sewage of wash house, it is characterized in that: pre-wash water, washings in the washing machine are transported in the circulation water pot, by pump pressure the pre-wash water of circulation water pot, washings are delivered in the ceramic membrane filter system and are filtered, small-molecule substance (liquid) along in the vertical direction microporous barrier enter intermediate water tank, go by defeated the getting back in the washing machine of pump pressure again, and macromolecular material or solid particle tunicle are held back, fluid is reached separate concentrated and purifying, the condensed water of formation is discharged away.

2, by the process for recovery and using sewage of wash house of claim 1 defined, it is characterized in that: the ceramic membrane filter system adopts dynamic cross-flow filtration mode, promptly under the driving of pressure, material liquid at film pipe internal membrane laminar surface with certain flow velocity flow at high speed.