CN111979679A - Energy-saving emission-reducing hot water control circulating system of dye vat - Google Patents
Energy-saving emission-reducing hot water control circulating system of dye vat Download PDFInfo
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- CN111979679A CN111979679A CN201910421050.XA CN201910421050A CN111979679A CN 111979679 A CN111979679 A CN 111979679A CN 201910421050 A CN201910421050 A CN 201910421050A CN 111979679 A CN111979679 A CN 111979679A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 238000003860 storage Methods 0.000 claims abstract description 112
- 239000007788 liquid Substances 0.000 claims abstract description 100
- 239000002699 waste material Substances 0.000 claims abstract description 98
- 239000000498 cooling water Substances 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 59
- 230000008569 process Effects 0.000 claims abstract description 46
- 238000000746 purification Methods 0.000 claims abstract description 38
- 230000009467 reduction Effects 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 23
- 238000004043 dyeing Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000004065 wastewater treatment Methods 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 description 11
- 230000008859 change Effects 0.000 description 6
- 238000004321 preservation Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 101100372509 Mus musculus Vat1 gene Proteins 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
- D06B23/14—Containers, e.g. vats
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
- D06B23/20—Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
- D06B23/20—Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation
- D06B23/22—Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation for heating
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
- D06B23/30—Means for cleaning apparatus or machines, or parts thereof
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Abstract
The invention discloses an energy-saving emission-reducing heat-control water circulation system of a dye vat, which comprises a vat body, a dye liquor circulation system and a heat exchanger, wherein the heat exchanger comprises a water purification heat exchanger and a waste liquid heat exchanger, and further comprises a waste liquid storage device, a cooling water storage device and a high-temperature condensed water storage device; according to the invention, high-temperature condensed water, low-temperature cooling water and waste liquid generated in the working process of the dye vat are recovered, the liquid is used for participating in the temperature rise and reduction heat exchange process of the dye vat, the low-temperature cooling water is adopted, the dye solution is prepared, and the dye vat is cleaned, so that the purposes of reducing the consumption of high-temperature steam and cooling water, saving energy, reducing emission and improving the working efficiency are achieved.
Description
Technical Field
The invention relates to a dye vat system, in particular to an energy-saving emission-reducing heat-control water circulation system of a dye vat.
Background
In the known textile industry, a dye vat system for dyeing cloth or yarn needs to use a large amount of water resources in the dyeing process, and high-temperature steam is used for heating the dye vat system, so that a large amount of water resources and heat energy are consumed, and the efficiency is low.
And because the dyeing stage is finished, the dyeing wastewater needs to be cooled and discharged in stages and washed and cleaned, a large amount of water resources are consumed in the process, the heat of the high-temperature heat medium is difficult to be fully utilized, and the waste of heat energy and water resources is increased.
The existing energy-saving and emission-reducing scheme aiming at the dye vat system only simply focuses on the sensible heat value of high-temperature condensate water generated after high-temperature steam heat exchange to primarily heat dye liquor, the heat utilization efficiency is limited, the problem of heat loss during dye vat cooling cannot be solved, and the problem of waste of water resources cannot be solved.
Disclosure of Invention
The invention aims to provide an energy-saving emission-reducing heat-control water circulation system of a dye vat, which fully utilizes the heat energy of high-temperature steam, reduces the heat energy consumption in the temperature reduction process of the dye vat, reduces the water resource consumption and comprehensively improves various indexes of energy conservation and emission reduction of a dye vat system.
In order to achieve the technical purpose, the invention provides an energy-saving emission-reducing heat-control water circulation system of a dye vat, which comprises a vat body, a dye liquor circulation system, a heat exchanger, a waste liquid storage device, a cooling water storage device and a high-temperature condensed water storage device, wherein the vat body is provided with a water inlet, a water outlet and a water outlet;
the heat exchangers are divided into two groups, namely a water purification heat exchanger and a waste liquid heat exchanger.
The input end of a heating medium of the water purification heat exchanger is respectively connected with the output ends of the production water system, the production steam system, the cooling water storage device and the high-temperature condensed water storage device through pipelines, and each pipeline is provided with a control valve;
the heat medium output end of the water purification heat exchanger is respectively connected with the input ends of the cooling water storage device and the high-temperature condensed water storage device through pipelines, and each pipeline is provided with a control valve;
the input end of the dye liquor of the water purification heat exchanger is connected with the output end of the dye liquor circulating system through a pipeline, the output end of the dye liquor of the water purification heat exchanger is connected with the input end of the cylinder body through a pipeline, and each pipeline is provided with a control valve.
The heat medium input end of the waste liquid heat exchanger is connected with the output end of the waste liquid storage device through a pipeline, a control valve is arranged on the pipeline, and the heat medium output end of the waste liquid heat exchanger is connected with the input end of the waste liquid storage device through a pipeline;
the dye liquor input end of the waste liquid heat exchanger is connected with the output end of the dye liquor circulating system through a pipeline, the dye liquor output end of the waste liquid heat exchanger is connected with the input end of the cylinder body through a pipeline, and each pipeline is provided with a control valve.
The input end of the cylinder body is connected with the output end of the low-temperature cooling storage device through a pipeline, and a control valve is arranged on the pipeline;
The input end of the cylinder body is connected with a production water system through a water inlet valve;
the output end of the cylinder body is connected with the input end of the dye liquor circulating system through a pipeline, and a control valve is arranged on the pipeline;
the output end of the cylinder body is connected with the input end of the waste liquid storage device through a pipeline, and a control valve is arranged on the pipeline;
the output end of the cylinder body is connected with a wastewater treatment system through a cylinder body drain valve.
The waste liquid storage device, the cooling water storage device and the high-temperature condensed water storage device are internally provided with a temperature probe, a liquid level detection device and a circulating pump;
the bottom of the waste liquid storage device is also provided with a waste liquid discharge valve connected with a waste liquid treatment system.
The energy-saving emission-reducing and water-controlling circulating system of the dye vat detects the internal conditions of each storage device and the temperature of each port of the heat exchanger and the cylinder body through the PLT system, and controls each pipeline control valve to obtain the optimal energy-saving effect.
As the scheme of optimization upgrading and large-scale deployment of the invention, a set of waste liquid storage device, cooling water storage device and high-temperature condensed water storage device can be shared by a plurality of groups of dye vat cylinders.
The invention also provides a working method of the energy-saving emission-reducing heat-control water circulation system of the dye vat, which comprises the following working procedures:
a) And collecting high-temperature condensate water generated after heating steam passes through the water purification heat exchanger in the high-temperature operation process of the dye vat, and enabling the high-temperature condensate water to enter a high-temperature condensate water storage device.
b) In the process of cooling the dye vat, cooling water generated after production water passes through the water purification heat exchanger is collected and enters the low-temperature cooling water storage device.
c) And after the dyeing work is finished, collecting the produced dye liquor waste liquid into a waste liquid storage device.
d) In the dye vat heating process, if the temperature of the waste liquid in the waste liquid storage device is higher than that of the dye liquid in the dye vat body, the waste liquid heat exchanger is started, the dye liquid is heated by utilizing the sensible heat of the waste liquid, the heat energy of the waste liquid can be recycled, and the using amount of high-temperature steam is reduced.
e) In dye vat intensification in-process, if high temperature condensate water temperature is higher than the dye liquor temperature in the cylinder body in the high temperature condensate water storage device, start water purification heat exchanger and high temperature condensate water storage device, utilize the sensible heat of high temperature condensate water to dye liquor intensification to collect the play water of water purification heat exchanger heat medium output and get into low cooling water storage device, recoverable high temperature condensate water heat energy of this lifting reduces the use amount of high temperature steam.
The two steps d and e can be synchronously operated, or the step d is preferentially operated and then the step e is operated; when the two steps d and e are synchronously operated, the heat exchange efficiency of the two sets of heat exchange systems is higher than that of a single heat exchange system, so that the temperature rise time is shortened, and the working hours of the whole dyeing process are effectively reduced.
f) In the dye vat cooling process, if the temperature of the waste liquid in the waste liquid storage device is lower than the temperature of the dye liquor in the dye vat body, the waste liquid heat exchanger is started, the dye liquor is cooled by the waste liquid, the initial high-temperature heat energy of the dye liquor is exchanged for the waste liquid in the step, and the use of the cooling water is saved.
h) In the dye vat cooling process, if the temperature of the low-temperature cooling water in the low-temperature cooling water storage device is lower than the temperature of the dye liquor in the dye vat body, the water purification heat exchanger and the low-temperature cooling water storage device are started, the dye liquor is cooled by the low-temperature cooling water, and meanwhile, the use of the cooling water is saved.
The two steps f and h can be synchronously operated; when the f step and the h step are synchronously operated, the heat exchange efficiency of the two sets of heat exchange systems is higher than that of a single heat exchange system, so that the cooling time is shortened, and the working hours of the whole dyeing process are effectively reduced.
In order to achieve better heat exchange efficiency, the temperature difference in the above steps is optimally greater than 10 ℃, and when the double heat exchange system operates, the temperature difference is optimally greater than 5 ℃.
As the optimized work flow of the invention, i) after the dyeing work is finished, the cylinder body is cleaned by utilizing the residual water in the low-temperature cooling water storage device, and the wastewater after cleaning is directly discharged to the wastewater treatment system. The step can save water resource waste when the cylinder body is cleaned, and simultaneously avoid the loss of the inherent temperature of the cylinder body, thereby further improving the energy-saving efficiency of the system.
As the optimized working process of the invention, J) in the dye liquor blending stage, residual water in the low-temperature cooling water storage device is introduced into the cylinder body to participate in the dye liquor blending, thereby further improving the utilization efficiency of water resources.
As a simplified scheme of the invention, for a normal-temperature dye vat, a low-temperature cooling water storage device and a high-temperature condensed water storage device can be integrated into one device.
The invention has the advantages and benefits that: the waste liquid storage device, the high-temperature condensed water storage device and the low-temperature cooling water storage device are arranged to recover waste liquid and high-temperature steam condensed water, and the waste liquid and the high-temperature steam condensed water respectively participate in heat exchange in a heating stage and a cooling stage of the dye vat through two sets of heat exchange devices, so that the consumption of high-temperature steam is effectively reduced, and the aims of energy conservation, emission reduction and water conservation are achieved.
The invention also utilizes the condensed water converted from the high-temperature steam as the base water for blending the dye liquor and the cleaning water for cleaning the cylinder body, thereby maximizing the utilization of water resources.
In addition, the invention has 2 sets of heat exchanger systems, when the system is started simultaneously, the heat exchange speed can be improved, and the time for heating and cooling in the dyeing procedure is reduced, so that the whole time of the dyeing procedure is shortened, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a heat exchange system for a conventional dye vat;
FIG. 2 is a schematic view of an energy-saving emission-reducing heat-control water circulation system of the dye vat of the invention;
FIG. 3 is a structural view of the internal structure of a storage device adopted by the energy-saving emission-reducing heat-controlling water circulation system of the dye vat shown in FIG. 2;
FIG. 4 is a schematic diagram of a PLT system employed in the present invention;
FIG. 5 is a schematic view of the working flow of the energy-saving emission-reducing heat-controlling water circulation system of the dye vat shown in FIG. 2.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are given only
The technical solutions of the present invention are more clearly illustrated, but the protection scope of the present invention is not limited thereby.
As shown in figure 1, the heat exchange system of the conventional dye vat consists of a vat body 1, a dye liquor circulating system 2 and a pure water heat exchanger 4. Wherein the heat medium input end of the water purification heat exchanger 4 is connected with a production steam system through a steam valve 40 and is connected with a production water system through a water inlet valve 60, the heat medium output end of the water purification heat exchanger 4 is communicated with a wastewater treatment system, in addition, the dye liquor input end of the water purification heat exchanger 4 is connected with the output end of the dye liquor circulating system 2 through a pipeline, the dye liquor output end of the water purification heat exchanger 4 is connected with the input end of the cylinder body 1 through a pipeline, the input end of the cylinder body 1 is further connected with the production water system through a water inlet valve 10, the output end is connected with the input end of the dye liquor circulating system 2 and a.
The conventional dye vat as shown in fig. 1 adopts the following working procedures:
a liquor preparation process, namely after cloth is loaded into a vat, injecting water into the dye vat from a water inlet valve 10, completing the preparation of dye liquor through a dye liquor circulating system 2, and starting the cylinder body circulation of the dye liquor;
in the temperature-raising process, high-temperature steam is injected from the steam valve 40, the dye liquor is heated by the water purification heat exchanger 4 until the dye liquor reaches the working temperature, and condensed water generated by the high-temperature steam is discharged to a wastewater treatment system;
the heat preservation process reduces the consumption of high-temperature steam, keeps the dye liquor at the working temperature, meets the time required by dyeing and color fixation, and discharges condensed water generated by the high-temperature steam to a wastewater treatment system;
in the cooling process, the steam valve 40 is closed, the production water is injected from the water inlet valve 60, the dyeing solution is cooled to normal temperature through the water purification heat exchanger 4, and the generated cooling water is discharged to the wastewater treatment system;
and in the cleaning process, the waste liquid is discharged from a drain valve of the cylinder body to a wastewater treatment system, then the cylinder is opened to take out the cloth, then the water is injected into the dye vat from a water inlet valve 10, the cloth is circulated through a dye liquor circulation system 2, and the cloth is discharged to the wastewater treatment system after the system is cleaned.
From the above working procedures, it can be seen that a large amount of water resources and heat energy are wasted in the conventional dye vat and production process.
As shown in figure 2, the energy-saving emission-reducing and heat-controlling water circulating system of the dye vat comprises a waste liquid heat exchanger 3, a waste liquid storage device 5, a cooling water storage device 6 and a high-temperature condensed water storage device 7 besides a cylinder body 1, a dye liquor circulating system 2 and a water purifying heat exchanger 4.
The input end of the heating medium of the water purification heat exchanger 4 is respectively connected with the output ends of the production water system, the production steam system, the cooling water storage device 6 and the high-temperature condensed water storage device 7 through pipelines, control valves are arranged on the pipelines, and the water inlet valve 60 is connected with the production water system; the steam valve 40 is connected with a production steam system; the control valve 64 is connected with the cooling water storage device 6; the control valve 74 is connected to the high-temperature condensate storage 7.
The heat medium output end of the water purification heat exchanger 4 is respectively connected with the input ends of the cooling water storage device 6 and the high-temperature condensed water storage device 7 through pipelines, and each pipeline is provided with a control valve, wherein the control valve 61 is connected with the cooling water storage device 6; the control valve 71 is connected with the high-temperature condensed water storage device 7;
the dye liquor input end of the water purification heat exchanger 4 is connected with the output end of the dye liquor circulating system 2 through a pipeline, a control valve 24 is arranged in the middle, the dye liquor output end of the water purification heat exchanger is connected with the input end of the cylinder body 2 through a pipeline, and a control valve 41 is arranged in the middle.
A heat medium input end of the waste liquid heat exchanger 3 is connected with an output end of the waste liquid storage device 5 through a pipeline, a control valve 53 is arranged on the pipeline, and a heat medium output end of the pipeline is connected with an input end of the waste liquid storage device 5 through a pipeline;
the dye liquor input end of the waste liquor heat exchanger 3 is connected with the output end of the dye liquor circulating system 2 through a pipeline, a control valve 23 is arranged in the middle of the waste liquor heat exchanger, the dye liquor output end of the waste liquor heat exchanger is connected with the input end of the cylinder body through a pipeline, and a control valve 31 is arranged in the middle of the waste liquor heat exchanger.
The input end of the cylinder body 1 is connected with a process water system through a water inlet valve 10 and is also connected with the output end of a low-temperature cooling storage device 6 through a pipeline, and a control valve 61 is arranged on the pipeline;
the output end of the cylinder body 1 is connected with the input end of the dye liquor circulating system 2 through a pipeline, and a control valve 12 is arranged on the pipeline; is connected with the input end of the waste liquid storage device 5 through a pipeline, and a control valve 15 is arranged on the pipeline; and is also connected with a wastewater treatment system through a cylinder body drain valve 20.
The bottom end of the waste liquid storage device 5 is additionally provided with a waste liquid discharge valve 50 for discharging excessive waste liquid.
For the high-temperature and high-pressure dye vat, other devices such as a pressurizing valve and a pressure relief valve are arranged, and the devices do not participate in the heat energy exchange cycle, so that the energy efficiency of the system is not influenced, and the expression is not made.
As shown in fig. 3, the waste liquid storage device 5 and the housing are made of heat insulating material, and each has a temperature probe 502, a liquid level detector 503 and a circulating pump 501 inside, and a waste liquid discharge valve 50 at the bottom for discharging excess waste liquid. The cooling water storage device and the high-temperature condensed water storage device have the same internal structure;
as the system has a plurality of pipelines and valves, the working process is more complex than the conventional dyeing process, and the manual work is difficult to control in time and efficiently, the invention is used as an optimization scheme, as shown in figure 4, the PLT system detects the internal conditions of each storage device and the temperatures of each port of the heat exchanger and the cylinder body, and controls each pipeline control valve, thereby achieving the automatic and semi-automatic control process of reducing the manual intervention.
As shown in fig. 5, the present invention operates according to the following workflow:
a) collecting high-temperature condensate water generated after heating steam passes through the water purification heat exchanger 4 in the high-temperature operation process of the dye vat, and feeding the high-temperature condensate water into a high-temperature condensate water storage device 7; at this time, the steam valve 40 and the control valve 71 are opened, and the water inlet valve 60 and the control valves 64, 74, and 61 are closed.
b) In the process of cooling the dye vat, cooling water generated after process water passes through the water purification heat exchanger 4 is collected and enters the low-temperature cooling water storage device 6; at this time, the water inlet valve 60 and the control valve 61 are opened, and the steam valve 40 and the control valves 64, 74, and 71 are closed.
c) After the dyeing work is finished, collecting the produced dye liquor waste liquid into a waste liquid storage device 5; at this time, the control valve 15 is opened, and the control valve 12 and the cylinder drain valve 20 are closed.
The method comprises the following working steps based on the three steps of collecting high-temperature condensate water, low-temperature cooling water and waste liquid, and achieves the technical purposes of energy conservation, emission reduction and time saving through the following steps.
d) In the dye vat heating process, if the temperature of the waste liquid in the waste liquid storage device 5 is higher than that of the dye liquor in the dye vat 1, the waste liquid heat exchanger 3 is started, the valves 53, 23 and 31 are opened, and the dye liquor is heated by utilizing the sensible heat of the waste liquid;
e) in the heating process of the dye vat, if the temperature of the high-temperature condensate water in the high-temperature condensate water storage device 7 is higher than the temperature of the dye liquor in the dye vat 1, the water purification heat exchanger 4 and the high-temperature condensate water storage device 7 are started, the dye liquor is heated by utilizing the sensible heat of the high-temperature condensate water, and the effluent at the heat medium output end of the water purification heat exchanger 4 is collected and enters the low-temperature cooling water storage device 6; at this time, valves 41, 24, 74, 61 are opened and valves 71, 64, 40, 60 are closed.
The two steps d and e can be synchronously operated, or the step d is preferentially operated and then the step e is operated. Whether the two heat exchange systems synchronously operate depends on the temperature change tolerance of the dye and the cloth body, if the temperature change speed required by the dyeing process is less than or equal to 1.5 ℃ for 1 minute, the single-step operation is generally suitable, and if the high temperature change speed can be tolerated, the two heat exchange systems can be simultaneously started.
And e, after the operation of the step e is finished, entering a conventional temperature rising and heat preservation process, and operating according to the working process a.
f) In the process of cooling the dye vat, if the temperature of the waste liquid in the waste liquid storage device 5 is lower than that of the dye liquid in the cylinder body 1, the waste liquid heat exchanger 3 is started, the valves 53, 23 and 31 are opened, and the waste liquid is used for cooling the dye liquid;
h) in the process of cooling the dye vat, if the temperature of the low-temperature cooling water in the low-temperature cooling water storage device 6 is lower than the temperature of the dye liquor in the dye vat 1, the water purifying heat exchanger 4 and the low-temperature cooling water storage device 6 are started, the dye liquor is cooled by the low-temperature cooling water, and the low-temperature cooling water still flows back to the low-temperature cooling water storage device; at this time, valves 41, 24, 64, 61 are opened and valves 71, 74, 40, 60 are closed.
The two steps f and h can be synchronously operated. Whether the two heat exchange systems synchronously operate depends on the temperature change tolerance of the dye and the cloth body, if the temperature change speed required by the dyeing process is less than or equal to 1.5 ℃ for 1 minute, the single-step operation is generally suitable, and if the high temperature change speed can be tolerated, the two heat exchange systems can be simultaneously started.
In the steps, such as single-step operation, in order to keep a high heat exchange rate, the temperature difference is optimally more than 10 ℃; if the two heat exchange systems are started simultaneously, the temperature difference is preferably more than 5 ℃.
And (5) after the operation of the step h is finished, entering a conventional cooling and cleaning process, and operating according to the sequence of the working processes b and c.
i) After the cleaning work in the step c is finished, the valve 61 is opened to clean the cylinder body 1 by utilizing the residual water in the low-temperature cooling water storage device 6, and the cleaned wastewater is directly discharged to the wastewater treatment system through the cylinder body drain valve 20;
J) in the dye liquor blending stage, residual water in the low-temperature cooling water storage device 6 is introduced into the cylinder body 1 to participate in dye liquor blending, and the valve 61 is independently opened at the moment.
The above i and j steps are not essential for the same batch of production processes, and therefore are only preferred but not essential for the solution of the present invention.
The following explains the specific embodiment of the working procedure and the energy-saving and emission-reducing effects of the invention by combining with the actual working procedures.
Setting a dyeing processing process condition as follows: 1 ton of cloth, bath ratio 1: 10, namely consuming 10 tons of dye liquor water, wherein the ratio of the dye liquor to the hot steam is 1: and 3, namely 30 tons of steam water, wherein the heat consumption ratio of the heating stage to the heat preservation stage is 1:1, and the ratio of the dye liquor to the cooling water is 1:1, 10 tons of cooling water are consumed, so that the whole process consumes 30 tons of heat energy steam and 20 tons of normal temperature water, which is equal to 50 tons of comprehensive water resources.
The process is set to have the initial dye solution temperature of 30 ℃, the working temperature of the dye solution of 95 ℃, the cloth and the dye can endure the temperature rise of 3 ℃ per minute, but due to the restriction of the process capability of a single heat exchange system, the temperature rise temperature is actually 1.5 ℃ per minute, the system temperature rise time is (95-30)/1.5 =40 minutes, the heat preservation time of the dyeing procedure is 100 minutes, the cloth cylinder discharge temperature is 65 ℃, the temperature drop time is (95-65)/1.5 =15 minutes, and the whole working time is 155 minutes.
At the beginning of the work, the waste liquid storage device 5, the cooling water storage device 6 and the high-temperature condensed water storage device 7 are all vacant, and a first conventional work flow is executed.
And (c) collecting high-temperature condensed water according to the step of the flow a, wherein the comprehensive temperature is 95 ℃.
And (4) collecting low-temperature cooling water according to the step of the flow b, wherein the comprehensive temperature is 55 ℃.
According to the step of the flow c, 10 tons of waste liquid is collected and obtained, and the comprehensive temperature is 65 ℃.
In the subsequent steps, the operation is continued as follows.
Because of this dyeing technology, satisfy two heat transfer system simultaneous operation demands, the programming rate of two system simultaneous workings is 3 degrees centigrade per minute.
And (d) starting the waste liquid heat exchanger 5 according to the step of the process d, heating the dye liquor by utilizing the sensible heat of the waste liquid at 65 ℃ in the waste liquid heat exchanger 3, setting the initial temperature of the dye liquor to be 30 ℃, setting the working time of the waste liquid heat exchanger 5 to be (50-30)/3 and stopping working when the temperature of the dye liquor is 50 ℃, and at the moment, recovering the waste liquid to the waste liquid storage device 5 to be 55 ℃.
And (e) starting the water purification heat exchanger 4 and the high-temperature condensate water storage device 7 according to the step of the process e, heating the dye liquor by utilizing the sensible heat of the high-temperature condensate water at the temperature of 95 ℃, and collecting the effluent at the heat medium output end of the water purification heat exchanger 4 and entering the low-temperature condensate water storage device 6.
The first stage is that the temperature of the double heat exchangers is raised by 3 ℃ per minute, and the temperature of the dye liquor is raised by 50 ℃ after about 7 minutes. The second stage is the work of a single heat exchanger, the temperature rising speed is 1.5 ℃ per minute, and the work of the water purification heat exchanger 4 is set to reach the dye liquor temperature of 80 ℃. Thus the working time was (80-50)/1.5 =20 minutes.
In the above two steps, the high-temperature steam is not consumed any more, so the saving of the high-temperature steam amount is about: (30/2) × (80-30)/(95-30) ≈ 11 tons.
And then carrying out subsequent heating and heat preservation procedures according to the step of the flow a, and continuously recovering the high-temperature condensed water. Wherein, high-temperature steam is adopted to continuously raise the temperature to a preset temperature of 95 ℃, the temperature raising time is (95-80)/1.5 =10 minutes, and the overall temperature raising time combining the two steps of d and e is 7+20+10=37 minutes.
According to the steps of the flow f and the flow h, the dye liquor is cooled by synchronously utilizing the waste liquor in the waste liquor storage device 5 and the low-temperature cooling water in the low-temperature cooling water storage device 6, the difference between the initial temperatures of the waste liquor and the low-temperature cooling water is small, the dye liquor is set to work until the dye liquor is cooled to 65 ℃, namely, the whole process is not cooled by using the production water, and the required cooling working time is (95-65)/3 =10 minutes.
And (4) directly entering the step c of the process to directly recover the dye liquor because the temperature is reduced without using production water.
Since the same process continues to produce, the i cleaning step is omitted.
And according to the step of the process J, low-temperature cooling water is used for replacing part of normal-temperature water for blending, and 5 tons of dye liquor water is saved.
In the working steps, high-temperature steam is saved by 11 tons, and the energy-saving efficiency is 11/30 and is approximately equal to 36 percent; saving cooling water by 10 tons, saving dye liquor by 5 tons, and saving water resource by (11 +10+ 5)/50 = 54%; the time for heating and cooling is saved by 8 minutes, and the working efficiency is improved by 8/155 and is approximately equal to 5 percent. The energy-saving and emission-reducing effects are very obvious.
Assuming that a factory processes 50 tons of cloth every day, and the actual production cycle of a year is 300 days, the energy is saved by 11 tons of X50 =550 tons of hot steam every day, the conversion is carried out according to the high-temperature steam converted standard coal 20:1, and the annual energy saving converted standard coal is about: 550 tons of standard coal with 300 days/20 =8250 tons, and the economic benefit is about 415 ten thousand yuan according to 500 yuan per ton.
In addition, water resources are saved (11 +10+ 5) × 50=1300 tons every day, water is saved by 39 ten thousand tons all the year round, and the water cost and the wastewater treatment cost are comprehensively 5 yuan per ton, so that the economic benefit is 195 ten thousand yuan.
The above description is only a preferred embodiment of the present invention, and in the actual deployment process of the present invention, the operation may not be completely performed according to the above embodiments due to the difference of the requirements of the production process, so that the embodiments of the present invention should not be construed as limiting the present invention. It should be noted that, for those skilled in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should be considered to be within the effective protection scope of the present invention.
Claims (9)
1. Energy saving and emission reduction accuse hot water circulating system of dye vat, including cylinder body, dye liquor circulating system and heat exchanger, its characterized in that:
the energy-saving emission-reducing heat control device also comprises a waste liquid storage device, a cooling water storage device and a high-temperature condensed water storage device;
the heat exchanger comprises a water purification heat exchanger and a waste liquid heat exchanger.
2. The energy-saving emission-reducing heat-control water circulation system of the dye vat according to claim 1, characterized in that:
the input end of a heating medium of the water purification heat exchanger is respectively connected with the output ends of the production water system, the production steam system, the cooling water storage device and the high-temperature condensed water storage device through pipelines, and each pipeline is provided with a control valve;
the heat medium output end of the water purification heat exchanger is respectively connected with the input ends of the cooling water storage device and the high-temperature condensed water storage device through pipelines, and each pipeline is provided with a control valve;
the input end of the dye liquor of the water purification heat exchanger is connected with the output end of the dye liquor circulating system through a pipeline, the output end of the dye liquor of the water purification heat exchanger is connected with the input end of the cylinder body through a pipeline, and each pipeline is provided with a control valve.
3. The energy-saving emission-reducing heat-control water circulation system of the dye vat according to claim 1, characterized in that:
The heat medium input end of the waste liquid heat exchanger is connected with the output end of the waste liquid storage device through a pipeline, a control valve is arranged on the pipeline, and the heat medium output end of the waste liquid heat exchanger is connected with the input end of the waste liquid storage device through a pipeline;
the dye liquor input end of the waste liquid heat exchanger is connected with the output end of the dye liquor circulating system through a pipeline, the dye liquor output end of the waste liquid heat exchanger is connected with the input end of the cylinder body through a pipeline, and each pipeline is provided with a control valve.
4. The energy-saving emission-reducing heat-control water circulation system of the dye vat according to claim 1, characterized in that:
the input end of the cylinder body is connected with the output end of the low-temperature cooling storage device through a pipeline, and a control valve is arranged on the pipeline;
the input end of the cylinder body is connected with a production water system through a water inlet valve;
the output end of the cylinder body is connected with the input end of the dye liquor circulating system through a pipeline, and a control valve is arranged on the pipeline;
the output end of the cylinder body is connected with the input end of the waste liquid storage device through a pipeline, and a control valve is arranged on the pipeline;
the output end of the cylinder body is connected with a wastewater treatment system through a cylinder body drain valve.
5. The energy-saving emission-reducing heat-control water circulation system of the dye vat according to claim 1, characterized in that:
The waste liquid storage device, the cooling water storage device and the high-temperature condensed water storage device are internally provided with a temperature probe, a liquid level detection device and a circulating pump;
the bottom of the waste liquid storage device is also provided with a waste liquid discharge valve connected with a waste liquid treatment system.
6. The energy-saving emission-reducing heat-control water circulation system of the dye vat according to claim 1, characterized in that:
and detecting the internal conditions of each storage device and the temperature of each port of the heat exchanger and the cylinder body through the PLT system, and controlling each pipeline control valve.
7. The energy-saving emission-reducing heat-control water circulation system of the dye vat according to claim 1, characterized in that:
for a plurality of groups of dye vat cylinder bodies, a set of waste liquid storage device, a set of cooling water storage device and a set of high-temperature condensed water storage device can be shared.
8. The energy-saving emission-reducing heat-control water circulation system of the dye vat according to claim 1, which is characterized by operating according to the following working procedures:
a) collecting high-temperature condensate water generated after heating steam passes through a water purification heat exchanger in the high-temperature operation process of the dye vat, and enabling the high-temperature condensate water to enter a high-temperature condensate water storage device;
b) in the process of cooling the dye vat, collecting cooling water generated after production water passes through a water purification heat exchanger and then entering a low-temperature cooling water storage device;
c) After the dyeing work is finished, collecting the produced dye liquor waste liquid into a waste liquid storage device;
d) in the dye vat heating process, if the temperature of the waste liquid in the waste liquid storage device is higher than that of the dye liquid in the dye vat body, the waste liquid heat exchanger is started, and the dye liquid is heated by utilizing the sensible heat of the waste liquid;
e) in the heating process of the dye vat, if the temperature of high-temperature condensed water in the high-temperature condensed water storage device is higher than the temperature of dye liquor in the dye vat body, starting the water purification heat exchanger and the high-temperature condensed water storage device, heating the dye liquor by utilizing the sensible heat of the high-temperature condensed water, and collecting the effluent at the heat medium output end of the water purification heat exchanger to enter the low-temperature cooling water storage device;
the two steps d and e can be synchronously operated, or the step d is preferentially operated and then the step e is operated;
f) in the process of cooling the dye vat, if the temperature of the waste liquid in the waste liquid storage device is lower than that of the dye liquid in the dye vat body, starting a waste liquid heat exchanger, and cooling the dye liquid by using the waste liquid;
h) in the process of cooling the dye vat, if the temperature of low-temperature cooling water in the low-temperature cooling water storage device is lower than the temperature of dye liquor in the dye vat body, starting the water purification heat exchanger and the low-temperature cooling water storage device, and cooling the dye liquor by using the low-temperature cooling water;
the two steps f and h can be synchronously operated;
i) After the dyeing work is finished, cleaning the cylinder body by utilizing residual water in the low-temperature cooling water storage device, and directly discharging the cleaned wastewater to a wastewater treatment system;
J) in the later dye liquor blending stage, residual water in the low-temperature cooling water storage device is introduced into the cylinder body to participate in dye liquor blending.
9. The workflow of an energy saving and emission reduction heat control water circulation system of a dye vat according to claim 8, wherein:
the temperature difference is optimally more than 10 ℃.
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| TWI797973B (en) * | 2021-11-11 | 2023-04-01 | 大陸商南通帝人有限公司 | Energy saving and emission reduction device for water purification and recycling after liquid flow dyeing |
| CN116427121A (en) * | 2023-04-25 | 2023-07-14 | 金华市翔城自动化设备有限公司 | Novel dyeing machine |
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