CN1144776A - Apparatus and method for treatment of dye mill liquors - Google Patents
Apparatus and method for treatment of dye mill liquors Download PDFInfo
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- CN1144776A CN1144776A CN 95103581 CN95103581A CN1144776A CN 1144776 A CN1144776 A CN 1144776A CN 95103581 CN95103581 CN 95103581 CN 95103581 A CN95103581 A CN 95103581A CN 1144776 A CN1144776 A CN 1144776A
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Abstract
A process for treating waste dyeing liquid or similar liquid includes regulating pH value to 4 or less, and adding coagulant, adding inertial particles in it to form uniform suspension, during or before this procedure, adding high-molecular electrolytic flocculant for precipitation, and separation of clear liquid from deposit. Its apparatus is composed of collecting tank, settling tank and cylindrical internal precipitation room.
Description
The present invention relates to a kind of apparatus and method that are used to handle dyehouse waste liquid and similar waste liquid, particularly a kind of compact apparatus and novel method that is used for removing dyestuff, BOD, COD and dissolving or suspended solids from these waste liquids.
The dyehouse liquid waste results from the production and dyeing course of fabric fibre.These waste liquids contain for example dyestuff, BOD, COD and dissolving or suspended solids usually, these pollutents or be present in this waste liquid with dissolved state or with particle suspension state or colloidal state.
In this waste liquid one of the most unmanageable composition be the color component that the dyeing keratin-fiber process is produced in the fiber dyehouse.These liquid waste do not meet environmental requirement, can not directly be discharged into river, water system or urban water drain.Therefore, before dyehouse discharging, must handle,, and from this waste liquid, dyestuff removed wherein solid and other separated from contaminants.At present, the depths reason method of dyehouse waste liquid very satisfied and not with low cost also is so that install the required device of liquid waste disposal in the dyehouse or near it under limited steric requirements.
Though the present invention is special in the dyehouse liquid waste disposal, but need be appreciated that, the apparatus and method that are used to handle the dyehouse liquid waste disclosed in this invention also can be used to handle other similar waste liquid, and these waste liquids must be removed from waste liquid by pollutant component wherein before being discharged into environment.
For many years, from the waste liquid of dyehouse, remove dyestuff and become the problem of difficulty especially.Yet, find that this process is particularly suitable for from liquid waste dyestuff being removed the optimization experiment of the reduction BOD/COD that carries out from the present invention, can also greatly reduce COD simultaneously.Though dyestuff causes maximum harm to biology is also unlikely,, from point of view of environment protection, dyestuff removed from waste liquid be very important and be should top-priority problem.
Therefore, be sought after a kind of method and apparatus that is used to handle dyehouse or similar workshop-sink, so that these waste liquids after treatment can compliance with environmental protection requirements, and this treatment unit floor space is little, is adapted to be mounted within the dyehouse or near the dyehouse.
One of purpose of the present invention provides a kind of apparatus and method that are used to handle the dyehouse waste liquid, this method can be used for separating the composition of dyehouse waste liquid and similar waste liquid, make the liquid after handling to be discharged in the environment, this plant area area is little, and to a great extent less than traditional clarifying plant.
Process of the present invention has short advantage of operating time, because it almost is immediately to handle on the basis of continuous flow.Chemical reaction therebetween and mix and can finish within several minutes, by contrast, traditional defecation method must spend a few hours and just can finish.
According to method and apparatus provided by the present invention, can be used for pollutent is separated from waste liquid, this method may further comprise the steps:
(a) the pH value with this waste liquid is adjusted to 4 or lower;
(b) coagulating agent is added in the waste liquid;
(c) add inert particle, make this inert particle carrier be evenly dispersed in the waste liquid basically;
(d) this inert particle carrier is being evenly dispersed in the step of waste liquid basically, or after this step, is adding the polymer electrolyte flocculation agent, to form the throw out of this inert particle carrier, suspended solids and pollutent;
(e) make this throw out precipitation; Then
(f) this clarifying relatively liquid is separated with sedimentary throw out.
It is a kind of with pollutent isolating device from the water-based liquid waste that the present invention also provides, and this device comprises:
(a) receiving tank, liquid waste from the dyehouse is used to collect;
(b) settling bath is connected with receiving tank, and this settling bath comprises:
(i) shell,
(ii) columnar internal precipitate chamber, be used to hold and guide the flow direction of waste liquid, this settling chamber and settling bath abuts, and coaxial with the shell of settling bath, and the radius of settling chamber is less, thereby make and form the annular external channel between this shell and the settling chamber, wherein this liquid waste is directed passing the bottom that this settling chamber flows to settling bath to dirty, causes liquid waste to flow to the central part of settling bath downwards, clarified liquid then upwards and outwards flows, and passes external channel;
(c) intake vent is used to hold the discarded liquid stream from receiving tank, and guides this liquid waste to enter settling chamber in the settling bath;
(d) collector around the position that is installed in this settling bath top outer rim, is used to collect the clarified liquid that overflows from the settling bath top; And
(e) liquid waste discharge-channel is connected in the outer casing bottom of settling bath, is used for removing settling from settling bath.
Further specify feature of the present invention and purpose below in conjunction with accompanying drawing.
Fig. 1 is the device synoptic diagram that is used to handle dyehouse waste liquid and similar waste liquid;
Fig. 2 is the plan view from above of the settling bath of this device among Fig. 1;
Fig. 3 is the side-view of this settling bath among Fig. 2;
Fig. 4 is the enlarged view of this settling bath among Fig. 1.
The method and apparatus that being used to of the following stated handled the dyehouse liquid waste is embodiments of the invention.Should be appreciated that those of ordinary skill in the art understand these method and apparatus, after carrying out necessary modifications, be applicable to that also handling other contains the waste liquid of dyestuff, BOD, COD and other pollutent.
Consult Fig. 1 and Fig. 4, these synoptic diagram are depicted the device that the present invention is used to handle dyehouse waste liquid process, contain dyestuff, biochemical oxygen demand (BOD) (BOD), chemical oxygen demand (COD) (COD), dissolving and suspended solids and pollutent in this liquid waste, and they may be:
(a) be dissolved in this waste liquid;
(b) be present in this waste liquid with the particle suspension state; Or
(c) be present in this waste liquid with colloidal state,
Or composition wherein.This liquid waste is referred to as " waste liquid " or " liquid waste " in this article, and both can exchange.
In the present embodiment, passage 12 is transported to this liquid waste the adjustment pond 14 from the dyehouse.Adjust pond 14 as collector or storagetank, in order to the flow of adjusting this liquid waste and the Pollutant levels of discharging by passage 12 from the dyehouse.Adjust pond 14 and can also be used as supporting device, be used for supporting device 10 and other groove, so as to reducing the floor space of device 10.
Adjust pond 14 and can select to comprise that agitator and/or gas blower (not shown) to carry out aeration and stirring, prevent to adjust the contained solid precipitation of liquid waste in the pond 14.
Coagulating agent preferably is selected from aluminium salt, ferrous salt and molysite.Coagulating agent can optionally be controlled, and, according to the kind and the character of objectionable impurities in the coagulation tank 28, coagulating agent is introduced coagulation tank 28 respectively from groove 30 and 32 that is.
Tempering tank 34 is installed within the coagulation tank 28, makes the upper limb of groove 34 inwalls lower than the upper limb 38 of cell wall 40.The liquid waste that is stored in the groove 28 can automatically be flow in the tempering tank 34 by the direction of arrow 42 indications.Agitator 44 is installed in the tempering tank 34, by axle 46 and impeller 48 with the liquid waste thorough mixing.
Suitable alkali is housed in the groove 50, is used for making the pH value in the groove 34 to bring up to 5 or higher, and in groove 34, is preferably 5.5 or higher.In the groove 52 flocculation agent is housed, in order to add in the groove 34 to form throw out.
It is sharp that this blended liquid waste contains flocculation, and the pH value is 5 or higher, and contains recuperable carrier (will discuss hereinafter), and this waste liquid can automatically flow through passage 54 and enter in the settling bath 60, and settling bath 60 is used for objectionable impurities is separated from liquid waste.
Consult Fig. 2 and Fig. 3, passage 54 is connected with settling chamber 58, and settling chamber 58 is installed among the settling bath 60.It is conical that settling bath 60 generally is, and its first half 62 is cylindrical, and Lower Half 64 is conical.Settling chamber 58 is installed in the central part in this settling bath 60 first halves 62, and clarifying liquid separates in the concentrated solution that is used for containing the higher objectionable impurities of concentration and this settling bath.The liquid waste that enters settling chamber 58 flows to the bottom of settling bath 60 downwards.Liquid waste drops to the bottom of settling bath 60 apace, the throw out and the bigger pollutent of other particle that form by flocculation agent and carrier drop on its bottom, and by the bottom sucking-off of sludge pump 66 from settling bath, become settling, enter the cyclonic separator 70 that is positioned at groove 34 tops by passage 68.Cyclonic separator 70 separates the discarded composition of deleterious throw out and other from this carrier, and liquid waste is discharged by passage 72, becomes mud.This carrier is an inert support, preferably is selected from following material: sand, aluminium sesquioxide, garnet, magnetite, rhombohedral iron ore, ilmenite and calcite.This carrier is discharged from the outlet at bottom of cyclonic separator 70, returns and enters tempering tank 34, recycling in liquid waste is next time handled.
Clarifying liquid upwards flows through annular zone 82, between the cell wall 80 of the settling bath 60 of annular zone 82 in settling chamber and the first half 62 zones.Can be clear that from Fig. 3 zone 82 is annular passages, upwards flow in order to guide clarifying liquid.When more liquid waste flows to settling chamber 58 from tempering tank 34, when being full of groove 60, clarifying liquid can upwards flow, and overflows from groove 60, enters the Receiving bin 74 that is positioned at groove 60 neighborings.Clarifying liquid flows out by gravity, is discharged in water drain, river or other the outside discharging container by Receiving bin outlet 76.
Following experiment utilizes method of the present invention to carry out, and its result is as follows:
Table 1
Feeding liquid output liquid reduced rate %
BOD 830mg/l 430mg/L 48.2％
Color 500tcu 50tcu 90%
Feeding liquid output liquid reduced rate %
BOD 540mg/l 170mg/L 68.5％
Color 2,000tcu 140tcu 93%
The settling velocity of this settling bath is very fast, and the residence time is very short, thereby makes this waste liquid clarification.As a result, the floor space of this device is very little, under same continuous flow condition, compares with the tradition precipitation clarifying plant of same treatment amount, and its floor space only is 5% or littler.
Claims (20)
1. method that is used to handle dyehouse waste liquid and similar waste liquid, this method can be used for objectionable impurities separated from the water-based waste liquid in dyehouse or similar waste liquid removes, and it is characterized in that may further comprise the steps:
(a) the pH value with waste liquid is adjusted to 4 or lower;
(b) coagulating agent is added in the waste liquid;
(c) make the inert particle carrier be evenly dispersed in the waste liquid basically;
(d) this inert particle carrier is being evenly dispersed in the step of waste liquid basically, or after this step, is adding flocculation agent, to form the throw out of inert particle and pollutent;
(e) make this throw out precipitation; And
(f) clarifying relatively continuous flow is separated with sedimentary throw out.
2. the method that is used to handle dyehouse waste liquid and similar waste liquid according to claim 1 is characterized in that comprising that the pH value with this waste liquid is adjusted to 3 or lower.
3. the method that is used to handle dyehouse waste liquid and similar waste liquid according to claim 1 and 2 is characterized in that also comprising that the step described in the claim 1 (b) adds coagulating agent and afterwards the pH value of this waste liquid is adjusted to 5 or higher.
4. the method that is used to handle dyehouse waste liquid and similar waste liquid according to claim 3 is characterized in that also comprising that the step described in the claim 1 (b) adds coagulating agent and afterwards the pH value of this waste liquid is adjusted to 5.5 or higher.
5. according to the method that is used to handle dyehouse waste liquid and similar waste liquid described in the claim 1,2 or 4, it is characterized in that also comprising the processing throw out, so that this inert particle carrier is separated from this liquid and pollutent, and the carrier after will separating imports the waste liquid after this coagulating agent is handled again, with the inert particle carrier in the step (c) that is formed on claim 1.
6. the method that is used to handle dyehouse waste liquid and similar waste liquid according to claim 1 is characterized in that this coagulating agent is selected from following material, comprising: aluminium salt, ferrous salt and molysite.
7. the method that is used to handle dyehouse waste liquid and similar waste liquid according to claim 1 is characterized in that this inert particle is selected from following material: sand, aluminium sesquioxide, garnet, magnetite, rhombohedral iron ore, iron iron ore and calcite.
8. device that is used to handle dyehouse waste liquid and similar waste liquid, this device is used for objectionable impurities is separated from the water-based waste liquid, it is characterized in that comprising:
(a) receiving tank, waste liquid from the dyehouse is used to collect;
(b) settling bath is connected with receiving tank, and this settling bath comprises:
(i) shell,
(ii) columnar internal precipitate chamber is used to hold and guide the flow direction of this waste liquid, settling chamber and settling bath abuts, and coaxial with the shell of settling bath, the radius of settling chamber is less, forms the annular external channel between this shell and the settling chamber thereby make;
Wherein this liquid waste is directed passing the bottom that this settling chamber flows to settling bath to dirty, causes liquid waste to flow to the central part of settling bath downwards, and clarified liquid then upwards and outwards flows, and passes external channel;
(c) intake vent is used to hold the discarded liquid stream from receiving tank, and guides this waste liquid to enter settling chamber in the settling bath;
(d) collector around the position that is installed in this settling bath top outer rim, is used to collect the clarified liquid that overflows from the settling bath top; And
(e) discharging of waste liquid passage is connected in the bottom of settling bath, is used for removing settling from settling bath.
9. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 8 is characterized in that this settling chamber is installed in the top of this receiving tank.
10. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 9 is characterized in that this settling chamber is by this receiving tank supporting.
11. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 8 is characterized in that this intake vent is designed to certain angle and is connected with settling bath, so that waste water utilization gravity flows into settling bath from receiving tank.
12. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 8, it is characterized in that also comprising coagulation tank, be used to hold waste liquid from receiving tank, and this waste liquid entered intake vent, this coagulation tank also comprises the coagulation tank divider, is used for according to dosage coagulating agent being distributed entering this coagulation tank.
13. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 8, it is characterized in that also comprising tempering tank, be used to hold waste liquid from this receiving tank, and waste liquid entered intake vent, this tempering tank also comprises the tempering tank divider, is used for the inert particle carrier distribution is entered this tempering tank.
14. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 13, it is characterized in that also comprising cyclonic separator, be used for separating by whirlwind is discharged this inert particle carrier from this exit passageway settling, this cyclonic separator comprises the refuse relief outlet that is used to discharge mud, and the carrier relief outlet that is used for the isolated vectors discharge is entered this tempering tank.
15. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 13, it is characterized in that also comprising coagulation tank, be used to hold waste liquid from this receiving tank. and this waste liquid is entered this tempering tank, this coagulation tank also comprises the coagulation tank divider, is used for the coagulating agent distribution is entered this coagulation tank.
16. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 15, it is characterized in that also comprising pH adjustment tank, be used to hold waste liquid from this receiving tank, and this waste liquid entered this coagulation tank, this pH adjustment tank also comprises the pH adjustment tank divider, is used for the acid reagent distribution is entered this pH adjustment tank.
17. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 13, it is characterized in that this tempering tank also comprises the alkaline substance divider, be used for this alkaline substance is distributed the waste liquid that enters in this tempering tank, in order to improve the pH value of liquid in this tempering tank.
18. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 8 is characterized in that the shell of this settling bath comprises conical half area, it is connected with columniform upper half area, and the settling chamber roughly is installed in this cylindrical region.
19. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 16 is characterized in that this pH adjustment tank, coagulation tank and tempering tank are installed in the top of this receiving tank.
20. the device that is used to handle dyehouse waste liquid and similar waste liquid according to claim 19, it is characterized in that this tempering tank is installed in the upper half area of this coagulation tank, and the upper limb height of this coagulation cell wall of upper limb aspect ratio of this tempering tank inwall that is positioned at coagulation tank inside is low, so that the waste liquid in this coagulation tank can be automatically flow into tempering tank from the top of this inwall, and can not overflow by this coagulation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103581 CN1144776A (en) | 1995-03-27 | 1995-03-27 | Apparatus and method for treatment of dye mill liquors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103581 CN1144776A (en) | 1995-03-27 | 1995-03-27 | Apparatus and method for treatment of dye mill liquors |
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| Publication Number | Publication Date |
|---|---|
| CN1144776A true CN1144776A (en) | 1997-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95103581 Pending CN1144776A (en) | 1995-03-27 | 1995-03-27 | Apparatus and method for treatment of dye mill liquors |
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| CN (1) | CN1144776A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819014A (en) * | 2012-11-16 | 2014-05-28 | 李彦民 | Rear alkalifying coagulation process |
| WO2017143806A1 (en) * | 2016-02-26 | 2017-08-31 | 盐城市华鸥实业有限公司 | Glass device for recovering and multilevel processing chemical waste water |
| CN112624281A (en) * | 2020-11-19 | 2021-04-09 | 温华环境科技（北京）有限公司 | Carrier for loading precipitation and flocculation precipitation method of carrier |
| CN114835303A (en) * | 2022-06-07 | 2022-08-02 | 西安交通大学 | Coral reef-like floc induction forming method for improving removal efficiency of small molecular organic matters |
-
1995
- 1995-03-27 CN CN 95103581 patent/CN1144776A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819014A (en) * | 2012-11-16 | 2014-05-28 | 李彦民 | Rear alkalifying coagulation process |
| WO2017143806A1 (en) * | 2016-02-26 | 2017-08-31 | 盐城市华鸥实业有限公司 | Glass device for recovering and multilevel processing chemical waste water |
| CN112624281A (en) * | 2020-11-19 | 2021-04-09 | 温华环境科技（北京）有限公司 | Carrier for loading precipitation and flocculation precipitation method of carrier |
| CN114835303A (en) * | 2022-06-07 | 2022-08-02 | 西安交通大学 | Coral reef-like floc induction forming method for improving removal efficiency of small molecular organic matters |
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