CN203269825U

CN203269825U - DMF (dimethylfomamide) recovery residue treatment system in synthetic leather manufacturing

Info

Publication number: CN203269825U
Application number: CN2013200016710U
Authority: CN
Inventors: 黄小平
Original assignee: NANPING BOSHIDA ENERGY-SAVING TECHNOLOGY Co Ltd
Current assignee: Blue Ocean Bolong Microfiber Co ltd
Priority date: 2013-01-04
Filing date: 2013-01-04
Publication date: 2013-11-06
Anticipated expiration: 2023-01-04

Abstract

The utility model provides a DMF (dimethylfomamide) recovery residue treatment system in synthetic leather manufacturing. The system comprises a vacuum processor, a vacuum pump device, a condenser, a DMF simi-finished product storage tank, a cooling tank, a cooling circulating pump, a drying boiler, a stirring machine, a heating device and a recovery boiler. The system provides a negative pressure treatment environment for the DMF residues and is matched with processes including condensation, recovery and the like, so that 40% of the DMF contained in a DMF raffinate is recovered, and meanwhile, the remained residues are subjected to compulsory stirring and evaporation to form solid-phase residues so as to improve the recovery rate of a DMF finished product and reduce the discharge of the residues. The system is a technology capable of saving energy, reducing the emission and reducing environment pollutions, and creates economic benefits for enterprises.

Description

Chemical leather DMF reclaims slag treatment system

Technical field

The utility model relates to a kind of synthetic leather waste recovery and utilizes the field, refers in particular to a kind of chemical leather DMF and reclaims slag treatment system.

Background technology

Flourish synthetic leather industry is that numerous enterprises has brought unlimited business opportunity, and for synthetic leather manufacturing concern, as dissolution with solvents PU resin with DMF in the manufacturing processed of PU leather, then flood or cover with paint, lacquer, colour wash, etc. in the surface of base cloth and form bass, utilize the solvability of DMF and water in this process, DMF is washed out, therefore produced the waste water in the wet processing manufacturing processed.Be born the initial stage at Synthetic Leather; waste water is not done to reclaim and directly discharging; but the residue that produces in the DMF of synthetic leather enterprise removal process has also caused certain pollution to environment; in recent years; along with the enhancing of the mankind to environmental protection consciousness; environmental administration makes great efforts to administer the pollution problem of synthetic leather industry repeatly in addition; for the dimethylamine that reclaims in overhead water; most of enterprise has obtained effective improvement by the dimethylamine purification system; but the environmental protection company that all transfers to qualification for residue processes, and enterprise does not have ripe treating method at present.My company has researched and developed this DMF residue treatment technology for this reason, and environment protection and the economic benefit that improves enterprise are all had significant meaning.

The utility model content

The purpose of this utility model is to have overcome defects, provides a kind of chemical leather DMF to reclaim slag treatment system.

The purpose of this utility model is achieved in that a kind of chemical leather DMF reclaims slag treatment system, and it comprises vaccum processor, vacuum pump apparatus, DMF work in-process storage tank, condenser, cooling tank, coolant circulation pump, dry pot, stirrer, heating unit and reclaims pot; Described vaccum processor connects vacuum pump apparatus, and vacuum pump apparatus connects dry pot, and described heating unit is set in dry pot, and heating unit is connected with the heat regulation valve, and described stirrer output has stirring-head to stretch in dry pot; Described dry pot one tunnel connects described recoverys pot, and is provided with baiting valve between the two, an end of another road connection condenser of dry pot, and the condenser the other end is connected with DMF work in-process tank; Described cooling tank connects dry pot, and is provided with the cooling tank inlet valve between the two; Also be provided with emptying drain tap and dreg-discharging gate on described dry pot;

In said structure, it also comprises the DMF retrieving arrangement, and the DMF retrieving arrangement is connected with DMF work in-process tank, and is provided with the work in-process tank valve between the two;

In said structure, it also comprises coolant circulation pump, and coolant circulation pump is arranged between cooling tank and dry pot;

In said structure, described vacuum pump apparatus comprises at least 2 vacuum pumps, and described vacuum pump apparatus and vaccum processor and condenser, dry pot are connected.

The beneficial effects of the utility model are to utilize the decomposition of DMF under negative pressure, velocity of evaporation than characteristics faster under normal pressure, and need not add any recovery catalyst in whole removal process, utilize high temperature forced evaporation deacidification principle, remaining solid phase slag is transferred to qualification unit and is concentrated burning disposal.Whole technology can reclaim the DMF that contains 40% in the DMF raffinate, simultaneously thereby remaining residue is formed through the action of forced stirring evaporation rate of recovery that the solid phase slag has improved the DMF finished product, also reduced the discharge capacity of residue, be the technology that a Jie Neng ﹑ Jian Pai ﹑ reduces environmental pollution, created more economic benefit to enterprise.

Description of drawings

Below in conjunction with accompanying drawing in detail concrete structure of the present utility model is described in detail

Fig. 1 is system architecture schematic diagram of the present utility model.

The 1-vaccum processor; The 2-vacuum pump apparatus; 3-DMF work in-process storage tank; The 4-condenser; The 5-cooling tank; The 6-dry pot; The 7-stirrer; 8-reclaims pot; The 9-coolant circulation pump; The 10-DMF retrieving arrangement; 11-heat regulation valve; 31-work in-process tank valve; 56-cooling tank inlet valve; The 86-baiting valve.

Embodiment

By describing technology contents of the present utility model, structural attitude in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.

The residue that existing DMF reclaims by analysis after, roughly form and see the following form:

DMF reclaims residue and forms table

Project	Content	Proterties
			Auxiliary agent.	～5%	Liquid

DMF	～40%	Liquid
			Calcium powder, wood powder and polymkeric substance	～55%	Solid

In conjunction with above-mentioned analysis, as Fig. 1, the utility model provides a kind of chemical leather DMF to reclaim slag treatment system, and it comprises vaccum processor 1, vacuum pump apparatus 2, DMF work in-process storage tank 3, condenser 4, cooling tank 5, dry pot 6, stirrer 7, heating unit and reclaims pot 8.

In above-mentioned, vaccum processor 1 connects vacuum pump apparatus 2, and vacuum pump apparatus 2 connects dry pots 6, and dry pot 6 is interior arranges described heating unit, and heating unit is connected with the heat regulation valve.7 outputs of described stirrer have stirring-head to stretch in dry pot 6, and dry pot 6 one tunnel connects described recovery pot 8, and are provided with baiting valve 86 between the two, an end of dry pot 6 another roads connection condensers 4, and condenser 4 the other ends are connected with DMF work in-process tank 3; Described cooling tank 5 connects dry pot 6, and is provided with cooling tank inlet valve 56 between the two; Also be provided with emptying drain tap and dreg-discharging gate on described dry pot 6.

As an embodiment, best system also comprises DMF retrieving arrangement 10, and DMF retrieving arrangement 10 is connected with DMF work in-process tank 3, and is provided with work in-process tank valve 31 between the two.

As an embodiment, best system also comprises coolant circulation pump 9, and coolant circulation pump 9 is arranged between cooling tank 4 and dry pot 6;

As an embodiment, better vacuum pump apparatus comprises at least 2 vacuum pumps, and vacuum pump apparatus and vaccum processor 1 and condenser 4, dry pot 6 are connected, and the quantity of vacuum pump is according to the required rank of negative pressure and the situation configuration quantity of coupling device of reaching.

Embodiment:

Chemical leather DMF reclaims slag treatment system and comprises equipment list (vertical)

The utility model system support treatment process is as follows, and it comprises:

A), produce the step that negative pressure is used for DMF raffinate drying;

This step is utilized the faster characteristics of the decomposition rate of the higher DMF of temperature, when negative pressure, and the DMF boiling point lowering, the needed heat of decomposing D MF reduces, and service temperature is low, and decomposition rate slows down, energy efficient.

Better, in this step, the negative pressure of DMF raffinate dry environment should be higher than 0.08MPa, and the DMF boiling point is low under this negative pressure, and service temperature is suitable, can reach maximum energy consumption saving.

B), the step that the DMF raffinate that enters is stirred and heats;

Because the boiling point of DMF is 153 ℃, therefore better, the heating to the DMF raffinate in this finally makes service temperature at 150 ℃-200 ℃.By strong stirring, make constantly evaporation and the recovery of liquid that contains in the DMF raffinate thus, the Gu Xing Wu ﹑ Mu Zhi Fen ﹑ Bu Mao ﹑ Tanization Gai ﹑ part small molecules PU ﹑ Zhu Ji ﹑ carbide that stays and polymkeric substance etc. at high temperature stir evaporate to dryness.

C), collect the gas that the DMF raffinate is subjected to thermal evaporation, it is carried out condensation, and with in liquid after condensation and after deliver to the step of DMF retrieving arrangement re-distillation;

D), after the DMF raffinate evaporates, stopped heating is to the logical water-cooled step of dried slag;

E), after dried slag is cooling, carry out exhaust until with the environmental stress balance after get rid of the step of dried slag;

Best, after being cooled to below 100 ℃, dried slag carries out exhaust in this step.

The technical process of this residue treatment, following turns waste into wealth, and reduces secondary pollution, and existing obvious social benefit has again the principle of economic benefit preferably.Utilize the decomposition of DMF under negative pressure, velocity of evaporation than characteristics faster under normal pressure, when negative pressure, the DMF boiling point lowering, service temperature is low, and the needed heat of decomposing D MF reduces, energy efficient.Need not add any recovery catalyst in whole removal process, utilize high temperature forced evaporation deacidification principle, remaining solid phase slag is transferred to qualification unit and is concentrated burning disposal.Whole technique can reclaim the DMF that contains 40% in the DMF raffinate, simultaneously remaining residue is evaporated the rate of recovery that forms solid phase slag (solid phase 50%, liquid phase 10%) thereby improved the DMF finished product through action of forced stirring, also reduced the discharge capacity of residue, be the technology that a Jie Neng ﹑ Jian Pai ﹑ reduces environmental pollution, created more economic benefit to enterprise.

The Processing Example of coupling system, technique:

A), open vacuum pump apparatus produce negative pressure in dry pot, negative pressure is to 0.08MPa, and is dry in order to the DMF raffinate;

B), start stirrer and open baiting valve the DMF raffinate is entered in dry pot, then opens the heat regulation valve and begin the dry pot heating, and the red-tape operati temperature is at 150 ℃-200 ℃;

C), open cold condenser water circle device, the DMF raffinate enters DMF work in-process storage tank after being subjected to the gas of thermal evaporation to become liquid through condenser condenses in dry pot, with in the alkali that arranges in DMF work in-process storage tank and after raffinate enter DMF retrieving arrangement re-distillation;

D), after the DMF raffinate evaporates, close heat regulation valve stopped heating, open the cooling tank inlet valve, adopt recirculated water that dried slag is cooling;

E), after dried slag is cooled to 100 ℃, the emptying drain tap of opening dry pot carries out exhaust, until the dry pot internal and external pressure balance, opens the dreg-discharging gate of dry pot, and the dried slag in dry pot is discharged outside pot.

The effect that the technical scheme that the utility model provides is gone into operation is as follows:

The sequence number project name	Unit	Quantity
			One production scale	?	?
1 processes level of residue	T/ day	2
			2 reclaim DMF(content 35%)	T/ day	0.7
2 years operation days	?	150
			Three main raw material(s)s, firing rate	?	?

?

1	Residue	T/	300
				2	Bunker coal	T/	53
Four	Utility power consumes	?	?
				1	Recirculated water (with reclaiming cooling tower)	m3/h	20
2	Electricity consumption (opening 150 days by recovery)	Kwh/a	64800
				3	Working capacity	kw	18
Five	Three wastes discharge amount	?	?
				?	Dried slag after processing	T/	195
Six	The device gross investment	Ten thousand yuan	105
				Seven	Annual sales revenue (in DMF)	Ten thousand yuan	60
Eight	Average annual total cost	Ten thousand yuan	9.2
				Nine	The annual profit total value	Ten thousand yuan	50
Ten	Payback period	?	2.5 year
				?	If consider the handling of saving	?	1.5 year

Electricity is by 0.6 yuan/kwh, and coal is 9.2 ten thousand yuan (not containing Abschreibungskosten and labor wage) by 1000 yuan/t, operation total cost; After this device operation, annual approximately 105 tons of the DMF that reclaim calculate by 5700 yuan/t more, and enterprise increases by 600,000 yuan of sales revenue; Save residue dispose approximately 24.15 ten thousand yuan of expense expenditures (the expense expenditure disposed of Fujian synthetic leather enterprise residue is 2300 yuan/t at present, reducing row's residue 105t year, the expense expenditure by minimum 2300 yuan/t).

As fully visible, the environmental benefit of the technical scheme that provides of the utility model is obvious; From Economic and Efficiency Analysis as can be known, enterprise also can obtain economic benefit preferably when obtaining environmental benefit.

The above is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification sheets and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.

Claims

1. a chemical leather DMF reclaims slag treatment system, it is characterized in that: it comprises vaccum processor, vacuum pump apparatus, condenser, DMF work in-process storage tank, cooling tank, coolant circulation pump, dry pot, stirrer, heating unit and reclaims pot; Described vaccum processor connects vacuum pump apparatus, and vacuum pump apparatus connects dry pot, and described heating unit is set in dry pot, and heating unit is connected with the heat regulation valve, and described stirrer output has stirring-head to stretch in dry pot; Described dry pot one tunnel connects described recoverys pot, and is provided with baiting valve between the two, an end of another road connection condenser of dry pot, and the condenser the other end is connected with DMF work in-process tank; Described cooling tank connects dry pot, and is provided with the cooling tank inlet valve between the two; Also be provided with emptying drain tap and dreg-discharging gate on described dry pot.

2. chemical leather DMF as claimed in claim 1 reclaims slag treatment system, and it is characterized in that: it also comprises the DMF retrieving arrangement, and the DMF retrieving arrangement is connected with DMF work in-process tank, and is provided with the work in-process tank valve between the two.

3. chemical leather DMF as claimed in claim 1 reclaims slag treatment system, and it is characterized in that: it also comprises coolant circulation pump, and coolant circulation pump is arranged between cooling tank and dry pot.

4. chemical leather DMF as claimed in claim 1 reclaims slag treatment system, and it is characterized in that: described vacuum pump apparatus comprises at least 2 vacuum pumps, and described vacuum pump apparatus and vaccum processor and condenser, dry pot are connected.