CN1082580C - Method and apparatus for heat treatment of textiles - Google Patents

Abstract

In order to avoid considerable recondensation and energy losses when heat-treating textiles in a heated, evacuated steamer (6), the liquid (9) is removed (12) from the steamer (6) and pumped (14) into a container (19) for subsequent reuse after the material has been treated with saturated steam.

Description

Textiles heat-treating methods and device

The present invention relates to be connected in the method for heat treatment textiles, especially Fang Zhi cop in the steamer of water and/or a chemical supply source and a vavuum pump or bobbin yarn and the device that is used to implement this method through valve at one.

" textiles " means any structure of being made by textile raw material, and comprises the material of fabric and sheet-form.

As everyone knows, heat treatment further is processed with desirable influence for yarn etc.

During more additional chemical substance, textiles just can be reached desired state or is implemented by handling in vapor phase.

For many years, more known suitable steamer, its comprise substantially one by pivotable lid closable cylindrical shape steam-boiler.At steamer is the inside of a water-bath, and it produces steam by a heater, and realizes introducing the suitable heat treatment of material.For making steam can be penetrated into the inside of textiles better, before the heater that is used for water-bath is connected, produce a kind of vacuum.

These known steamers have some shortcomings, and it needs lot of energy to form and to keep vacuum, and in addition, steam is taken away by vavuum pump and condensation again.Its result has just limited the water vapour penetration effect of processed material and/or has caused the long processing time.

The purpose of this invention is to provide a kind of method and apparatus, it uses less energy, can make processed material that better osmotic effect is arranged, and in addition, also can reduce circulation timei and total heat treatment cycle.

The invention provides a kind of a method that is connected in heat treatment textiles in the heating steam device of water and/or chemical substance supply source and vavuum pump through valve, wherein:

-in first step, steamer is filled wants processed material,

-in second step, vavuum pump is switched on subsequently, up to the vacuum that in steamer, produces at least 100 millibars (mbar),

-in third step, fetch boiling water or the feeding valve of chemical substance supply source, and a predetermined amount of liquid is fed in the steamer forming a kind of liquid bath,

-in the 4th step, liquid bath and the vapor phase that will be formed are heated to a predetermined temperature,

-processed material kept a preselected time in saturated vapor phase after, liquid was pumped out steamer and enters in the container,

-in the 5th step, start vavuum pump once more,

-in the 6th step, being evacuated of preliminary election, after cooling and drying time, vavuum pump is turned off and surrounding air is introduced in the steamer and

-in the end in the step, material takes out from steamer.

Preferably, in second step, produce at least 50 millibars vacuum.

Have 300 liters of volumes for liquid bath, the energy-efficient that the method according to this invention can cause being about each circulation 12KWh or handle 35～40KWh at every turn.In addition, the not condensation again of water vapour that during vacuum forms, is discharged from.The volume of the non-condensation again of being saved is about 20 liters of each cycle of treatment.

This just provides following further advantage, and the quantity of required fresh water then can reduce an order of magnitude owing to liquid recirculation of the present invention.

The supply mode that another advantage is chemical substance and/or arrangement additive not only simply but also economical, and this chemical substance and/or arrangement additive only are the loads that loads on vavuum pump slightly or do not constitute vavuum pump.

Heat treatment or the result that obtained simply mode by repeating at least once being enhanced of second to the 6th step.

Heat treatment can be by reaching optimization from first temperature that increases vapor phase gradually at least one heat treatment afterwards.

Preferably, during heating treatment, in first circulation, will form at least 350 ° vapor phase temperature, and it is at least 380 ° of K in further circulating.

During the heat treatment afterwards by under a steady temperature, increasing the holdup time, can improve treatment effect, and need not to increase energy consumption.

In addition, energy also can be saved by ventilating mode, and the therefore further minimizing of entire process time, and promptly before first heat treatment finished, in an intermediate steps, break vacuum was also set up subsequently again.

Optimal way is, water and/or chemical substance are to be set in the container of size by the volume according to liquid bath in the steamer to provide, and it forms a closed-system with steamer, like this from the outside only with the loss liquid be fed in this closed-system, the liquid of this loss be since by the material of steam treated and vacuumize in residual steam cause.This just realized liquid and or the recirculation of chemical substance, and therefore economical especially and be beneficial to environmental protection.

The present invention also provides the device that is used to implement said method, it comprises a heating steam device that is connected in water and/or chemical substance supply source and vavuum pump through valve, at least one container wherein is set, one pump and at least two valves to be being used for the supply of liquid and/or chemical substance, and this valve is used for that controlling liquid enters steamer and liquid is discharged from steamer.

Optimal way is that an electric heater unit is arranged in the space of the liquid bath in the steamer at least.Therefore this electric heater unit is especially favourable, because it can be controlled very neatly and good effect arranged.Some other heating system, for example steam-heating system also can be adopted economically according to effective energy.

Be preferably, vavuum pump is a kind of water ring pump or rotary vane pump.Very economic of water ring pump and be applicable to that vacuum reaches 30 millibars.The against vacuum degree is 5 millibars, needs to use rotary vane pump.

Embodiment of the present invention will be described by an example below in conjunction with accompanying drawing, wherein:

Fig. 1 is the rough schematic view of the steam unit that is used to handle cop according to the present invention,

Fig. 2 be according to the characteristic temperature curve map of vapor phase in the steamer of Fig. 1 device and

Fig. 3 is with respect to ambient air, the pressue-graph relevant with Fig. 2.

According to Fig. 1, gas exhaust piping is by reference number 1 expression, and the vavuum pump 2 with motor M is connected on the gas exhaust piping 1.Vacuum line 3 be connected on the input side of vavuum pump 2 (rotary vane pump) and by valve V1 and an exhaust pipe 4 and with the internal communication of steamer 6.

Another valve V2 also is provided with on the exhaust pipe 4 and is connected in an air pipe line 5.

A liquid bath 8, it liquid, aqueous 9 can reach the inside that plane N 1 and electric heater unit 10 are set up known steamer 6 itself.

At one end, steamer 6 is provided with a pivotable lid 7, and this lid has a vertical pivots 7a.The material G that will handle is imported in the steamer 6 by opening lid 7, and material 6 is by steam treatment in steamer 6.

Power line 11 is directed to a control module by electric heater unit 10, its regulatory function by+/-expression.

One liquid line 12 is drawn and is connected on pump line road 13 and the feeding pipe 22 by steamer 6.

Pump line road 13 is by valve V3, has the liquor pump 14 of motor M and pressure piping 15 and draws and receive valve V7, on V8 and the V9.Valve V7-V9 is connected to the bottom of liquid container 19-21 by I/O pipeline 16-18 as parts.Each of these liquid containers (jar) has a vent line 19 '-21 ' accordingly.

Valve V4-V6 also is arranged on I/O pipeline 16-18 and goes up and be connected on the feeding pipe 22.

Running according to Fig. 1 allocation plan is simple relatively: the inside of steamer 6 is by valve-off V2, opens valve V1 and connects vavuum pump 2 through vacuum lines 3 and 1 and be evacuated down to the low pressure of hope.Consequently, processed material is also become substantially do not have and retain air.

Valve 4 on the water pot 19 now is opened, and valve 9 still is closed, so that water is drawn in the steamer by feeding pipe 22 and liquid line 12, and water is just inserted the horizontal N1 of arrival position in the liquid bath 8 like this.Valve-off 4 and electric heater 10 are started simultaneously by connecting power supply subsequently, consequently in steamer 6 inner formation vapor phases, and owing to saturated steam is penetrated among the material G.

After the predetermined retention time, control module turn-offs heater 10, closes a V3 and V9 and is opened, and valve V4 still is closed and liquor pump 14 is switched on; Water is pumped back in the water pot 19 and turns back on the approximate water surface N2 position.The displaced air that causes thus then can be discharged from by vent line 19 '.

Similar is, acid or alkali can be input in the steamer 6 and can be sucked back by pump more subsequently by chemical substance jar 20.

Another advantage of this allocation plan is to be connected on the liquid wax jar after the steam processing in the end, so that material G, promptly with the processed of the spun yarn of cop form.

Fig. 2 and Fig. 3 have represented 1000 millibars the environmental pressure of heat treated characteristic curve in fact begun to be carried out by to(for) cop.Owing to illustrated reason, show low pressure with simple form among Fig. 3.

As shown in Figure 3, steamer 6 is evacuated to 5 millibars of pressure, after this from water pot 19 water is imported and heating, has the temperature of about 350 ° of K with generation, keeps constant 2 minutes vapor phase; As shown in Figure 2.During this technology, the pressure in the steamer 6 rises to about 420 millibars.

The surplus of break vacuum and steam is released in the air (environment), as Fig. 1 by exhaust pipe 4 and valve V2 then.

As shown in Figure 3, then produce 5 millibars vacuum again and begin second cycle of treatment.In this case, during the liquid that is provided by chemical substance jar 20 was heated, the temperature of vapor phase increased to 380 ° of K, and then pressure will be raised to 1300 millibars absolute pressure.

Identical mode occurs in the 3rd circulation, wherein uses the water wax solution that comes from liquid wax jar 21 to form liquid bath 8.

Prove very favorable aspect the heat treatment optimization with respect to increasing heat time heating time and retention time in first circulation that circulates in subsequently making.

The first circulation 1.C begins and continues 3 minutes after the technology 1.V that finds time for the first time; The second and the 3rd circulation 2.C and 3.C respectively have 4.0 minute perdurabgility.Promptly during residual moisture is removed from material, afterwards, finish whole heat treatment at the 4th exhaust technology 4.V.Above-mentioned material is a kind of cotton; Net weight is at the cop of 120g.

As being seen by Fig. 2 and 3, all heat treatment comprises that wax is applied on the yarn, although be very large cop, final duration is 18.5 minutes.

According to processed material and desired technology,,, may be favourable if a stram condenser additionally is connected to the upstream of vavuum pump 2 for economic reasons.

This processing technology also can be implemented under the vacuum that is higher than 50 millibars of pressure.Yet especially can increase process time when material is very heavy and/or is compressed, and handles quality and can reduce.

Claims (8)

1. the method for a heat treatment textiles (G) in heating steam device (6), described heating steam device (6) is connected to water by valve (V4-V9) and pump (14) with valve (V3) and/or chemical substance supply source (19-21) is gone up and by valve (V1, V2) be connected on the vavuum pump (2), wherein:

-in first step, steamer (6) is filled material to be processed (G), it is characterized in that:

-in second step, vavuum pump (2) is switched on, up to the vacuum that produces at least 100 millibars of absolute pressures in steamer (6);

-in third step, fetch boiling water and or the feeding valve (V7-V9) of chemical substance supply source (19-21), and a predetermined amount of liquid is fed in the steamer to form a kind of liquid bath (9);

-in the 4th step, liquid bath (9) and the vapor phase that is formed are heated to a predetermined temperature by a heater (10) that makes up;

-at processed textiles (G) after saturated vapor keeps a scheduled time in mutually, liquid is pumped out steamer (6) and enters into a container (19-21);

-in the 5th step, enable vavuum pump (2) once more,

-in the 6th step, in predetermined vacuumizing, after cooling and drying time, vavuum pump (2) is turned off and surrounding air is fed in the steamer (6) and

-in the end in the step, material (G) is taken out from steamer (6).

2. according to the method for claim 1, it is characterized in that the vacuum that produces is at least 50 millibars in second step.

3. according to the method for claim 1 or 2, it is characterized in that second to the 6th step is repeated once at least.

4. according to the method for claim 3, the temperature that it is characterized in that vapor phase is heat-treated at least one heat treatment afterwards from first to be increased.

5. according to the method for claim 4, it is characterized in that during heating treatment, in first circulation, will form the vapor phase temperature of at least 350 ° of K, and it is at least 380 ° of K in further circulating.

6. according to the method for claim 4, it is characterized in that steady temperature period during first heat treatment is shorter than heat treatment thereafter.

7. according to the method for claim 4, it is characterized in that before first heat treatment finished, in an intermediate steps, break vacuum also produced subsequently again.

8. according to the method for claim 1, it is characterized in that water and/or chemical substance are to provide from the container that the volume according to liquid bath the steamer sets size, and it forms a closed-system with steamer, by the outside only with the loss liquid be fed in this closed-system, the liquid of this loss be since by the material of steam treatment and find time in residual moisture cause.

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