JPS6130068B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a heat supply method in a fiber dyeing apparatus.

[Technical background of the invention and its problems]

The prior art will be explained with reference to FIG.

In the dyeing machine 1, the fiber yarn 5 is immersed in the dyeing liquid 7 and rotated by the roller 4. The dyeing liquid 7 flows into the coil 6 of the heat exchanger 3 through the pipe 12, is heated by steam, and is raised to a temperature in the range of about 80 to 130°C, and then flows out from the nozzle 9 and is dyed while rotating the fiber thread 5. Let soak evenly and dye. Depending on the type of fiber, the temperature of the dyeing liquid 7 is raised to a predetermined value in the range of approximately 80 to 130°C. The temperature of the dyeing solution 7 is regulated by well water flowing through a temperature regulating heat exchanger 23. Also, inside the dyeing machine 1, well water is diluted with cold water pipe 16.
The hot water at about 40°C flows in through the conduit 31. Steam to the heating heat exchanger 3 is introduced through the evaporation pipe 15 and steam pipe 11 of the boiler 2, while condensed water flows into the boiler 2 through the return pipe 14 and is circulated.

Well water for the dyeing apparatus is pumped up from the well by a pipe 32, stored in a well water tank 21, and then distributed to conduits 17, 18, 19 at a temperature of about 16°C. That is, the well water that has flowed into the conduit 17 is supplied to the boiler 2 and the dilution cold water pipe 16, and the well water that has flowed into the conduit 18 is supplied to the temperature adjustment heat exchanger 23.
The well water that flows into the conduit 19 is supplied to the heat exchanger 20.

The amount of used heated waste water flowing out from dyeing machine 1 is approximately 48~
enters the tube 22 in the heat exchanger 20 at a temperature of 60°C;
After exchanging heat with the well water at about 16° C. flowing in the pipe 21 and heating it, it becomes waste water at about 38° C. and flows into the drainage tank 27 via the pipe 13. Wastewater from other equipment also flows into the wastewater tank 27 through a pipe 29, and together with the wastewater flows into a wastewater treatment facility 30 through a pipe 28 at about 34°C, where it is treated and then discharged to the outside.

On the other hand, the well water heated by the heat exchanger 20 is approximately 40℃
The hot water flows into the hot water tank 25 as hot water. Hot water of 50°C or lower, which has been passed through the temperature adjusting heat exchanger 23 to adjust the temperature of the dyeing liquid, also flows into the hot water tank 25, and flows into the conduit 31 together with the hot water at a temperature of about 40°C.

Dyeing using such conventional dyeing machines ranges from normal temperature dyeing solutions to dyeing temperatures that vary depending on the type of fiber, such as animal, vegetable, and chemical fibers (80℃ to 130℃).
The dyeing machine is heated in batches depending on the type of fiber and the type of coloring, and the dyeing solution is heated from 16℃ of well water or room temperature of city water to the temperature of each stage mentioned above. The dyeing process is continued for about 2 to 3 hours, during which time the dyeing solution is heated, temperature controlled, slowly cooled, drained (overflow), and discarded. Since the staining solution is around 34℃, the raw water is 16℃ after all.
Most of it is discarded after the temperature has risen from 34°C to 34°C. Conventional methods use plate coolers and coil heat exchangers to exchange heat, but the increase in efficiency is minimal, and if you add in the conventional facilities without heat exchangers, the heat loss will increase. is huge. In addition, surface tension in the gaps between the twisted yarns prevented the dyeing solution from seeping into the yarn, making it impossible to quickly transfer the acceleration, dyeing solution seepage, and dyeing temperature. This resulted in unevenness and the disadvantage that the process had to be continued for a long time.

[Purpose of the invention]

The object of the present invention is to eliminate the huge heat loss of the prior art and save boiler fuel, thereby achieving energy savings, increasing the dyeing speed, and eliminating dye run-through and uneven dyeing.

[Summary of the invention]

The present invention operates a heat pump to heat the hot waste liquid discharged from a dyeing machine as a heat source, and heats the liquid from a refrigerant condensing temperature at which the coefficient of performance of the heat pump is at least 2.5 to a required dyeing solution temperature, that is, for example, 70 The present invention relates to a heat supply method in a textile dyeing apparatus that uses a boiler to heat the temperature range from ℃ to about 130℃.

Further, the present invention operates a heat pump to heat the temperature liquid discharged from the dyeing machine as a heat source, and also controls the dyeing liquid in the dyeing machine to a required temperature, so that the heated hot water is supplied to the heating side of the heat pump. The present invention relates to a heat supply method in a textile dyeing apparatus in which heating is performed by a boiler between the refrigerant condensation temperature and the required dyeing solution temperature at which the coefficient of performance of the heat pump is at least 2.5. The present invention also relates to the heat supply method for generating ultrasonic waves in the dyeing machine to promote dyeing.

[Embodiments of the invention]

An example of implementation of the present invention will be explained with reference to FIG.
In the figure, parts having the same reference numerals as in FIG. 1 have the same structure and operation as in FIG. 1.

A portion of the well water pumped up from the well and stored in the well water tank 21 remains at a temperature of 16°C and is stored in the hot water storage tank 25a.
is supplied to The heated wastewater that flowed into the wastewater tank 27 via the pipe 13 and the wastewater that flowed from the pipe 29 are approximately 34
It is stored in a wastewater tank at a temperature of ℃, and the pipe 28, 106
The temperature potential of this heated waste water is then used as a heat source and is transferred to a heat absorber (evaporator) 104 of a heat pump 101 operated by an electric motor 105 and a compressor 102.
After flowing in at a temperature of 23°C and imparting heat, it flows into the wastewater treatment facility 30 as wastewater at a temperature of 23°C. On the other hand, the heat absorbed by the heat absorber 104 is released by the condenser (heater) 103 of the heat pump 101. The hot water at the inlet of the hot water tank 25a with an average temperature of 45°C flows from the pipe 107 to the condenser 10.
3, the temperature is raised to 50 to 60°C by the heat described above, and the hot water is stored in the hot water storage tank 25a through the pipe 108. This hot water is pumped from the supply pipe 31 to the dyeing machine 1 at a temperature of 50 to 60℃.
Supplied at a temperature of

Then, the dyeing liquid in the dyeing machine 1 is heated to, for example, 90° C. by the heating heat exchanger 3. Fiber thread 5 is this
It is dyed by immersing it in a dye solution at 90°C. In the heat pump 101, the refrigerant evaporation temperature of the evaporator 104 is +15
℃, and the refrigerant condensation temperature of the condenser 103 is 60℃, the condenser outlet hot water is heated to about 55℃.

Therefore, the steam from the boiler 2 is heated by the temperature difference of 35°C from 55°C to 90°C. As shown in FIG. 3, the coefficient of performance of the electric heat pump is much lower than the theoretical value, but in the case of the above embodiment, the coefficient of performance COP is about 4.0, which is better than COP=2.5. The reason why we set the COP of the heat pump to at least 2.5 is that the fuel costs for heat pump and boiler heating are almost on the same level (assuming the electricity rate is constant). By the way, when the refrigerant evaporation temperature is +4℃ and the refrigerant condensation temperature is 70℃ (hot water temperature is 65℃), COP=
2.5, which is the comparative economic balance line between heat pump and boiler heating.

In the conventional technology shown in Fig. 1, especially when using the heat exchanger 20, even if the temperature of the waste water is used, the well water at 16°C is only heated to 40°C and returned to the dyeing machine 1. However, according to the present invention shown in FIG. 2, 16
It is possible to raise the temperature of well water at 50°C to 60°C and return it to the same temperature without any loss of electricity. Further, the efficiency can be further increased by driving the engine with an engine instead of an electric motor and utilizing exhaust heat, jacket heat, oil cooling heat, etc.

Further, an ultrasonic transmitter 34 is provided in the dyeing machine 1 to apply slight vibrations to the dyeing liquid or the twisted yarn to improve the dyeing effect, shorten the process, and eliminate uneven dyeing. Note that the raw water is not limited to well water, and may be other water sources such as tap water.

〔Effect of the invention〕

In conventional technology, the dyeing solution is heated in a boiler each time from room temperature to the required heating temperature determined according to the type of fiber yarn, and after the dyeing is completed, it is gradually cooled from that temperature, and this heating and removal are performed. Heat pumps are suitable for sucking up low-temperature exhaust equipment because both cooling and slow cooling use well water to absorb heat from the overflow low-temperature hot water.
Therefore, the present invention utilizes the heat that is wasted in the low-temperature water at around 30 to 40 degrees Celsius as a heat absorption source for the heat pump and uses it for heating purposes, making the coefficient of performance COP of the heat pump superior to that of the boiler. By using heat pumps at temperatures above 2.5 and using boiler heating for higher temperatures, we ensure good operating conditions for heat pumps and use boilers in areas with high efficiency. It is a useful energy saving system. Fuel costs can be reduced by 40-50% compared to conventional boiler heating alone.

In addition, when the well water is used for industrial purposes, the raw water temperature is high in the summer and efficiency increases, but in the winter the water temperature is lower than that of groundwater.
As the temperature drops below ℃, the heating efficiency decreases, so utilizing the waste heat at this time has a great effect.

In addition, an ultrasonic transmitter is installed in the machine to apply slight vibrations to the dye solution or twisted yarn, which improves the dyeing effect and eliminates unevenness, helping to shorten working time and save dye.

[Brief explanation of the drawing]

FIG. 1 is a flow sheet diagram of a conventional heat supply method in a textile dyeing apparatus, FIG. 2 is a flow sheet diagram of the present invention, and FIG. 3 is a graph of the coefficient of performance of an electric heat pump. 1...Dyeing machine, 2...Boiler, 101...Heat pump.

Claims (1)

[Scope of Claims] 1 A heat pump is operated to heat the hot waste liquid discharged from a dyeing machine as a heat source, and the temperature is between the refrigerant condensing temperature at which the coefficient of performance of the heat pump is at least 2.5 and the required dyeing liquid temperature. is a heat supply method for a textile dyeing machine that uses a heat pump and a boiler in combination, which is characterized by heating by a boiler. 2. The heat supply method for a textile dyeing apparatus according to claim 1, wherein the refrigerant condensation temperature is about 75°C or less and the required dyeing solution temperature is about 130°C or less. 3. A heat pump is operated to heat the hot waste liquid discharged from the dyeing machine as a heat source, and the heated water is introduced into the heating side of the heat pump by adjusting the dyeing solution in the dyeing machine to a desired temperature, The performance coefficient of the heat pump is at least
A heat supply method in a textile dyeing apparatus that uses a heat pump and a boiler in combination, characterized in that heating is performed by a boiler between a refrigerant condensation temperature of 2.5 or higher and a required dyeing solution temperature. 4. A heat supply method in a fiber dyeing apparatus according to any one of claims 1 to 3, characterized in that ultrasonic waves are generated within the dyeing machine to promote dyeing.