Dyeing and printing wastewater recycling system based on efficient heat collection solar heat pump

Abstract

The application aims to provide a printing and dyeing wastewater recycling system based on a high-efficiency heat collection solar heat pump, comprising: a printing and dyeing process device provided with a hot water inlet and a wastewater outlet, a printing and dyeing wastewater purification treatment device connected with the wastewater outlet, a water distribution valve provided with one inlet and two outlets, a nanofluid configuration device with high heat collection performance, a waste heat grade improvement device based on a solar heat pump, a circulating water heating device, a high-temperature hot water storage device, and a flow dynamic regulation and distribution device; the inlet of the water distribution valve is connected with the printing and dyeing wastewater recycling device; and the two outlets of the water distribution valve are respectively connected with the nanofluid configuration device and the circulating water heating system device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing and dyeing wastewater treatment and recycling, and particularly relates to a printing and dyeing wastewater recycling system based on a high-efficiency heat collection solar heat pump. BACKGROUND

[0002] The printing and dyeing textile industry is a basic industry to meet the needs of production and life. In the printing and dyeing process, a large amount of high-temperature hot water needs to be used, and a large amount of environmental pollutants such as wastewater and waste gas are generated, which makes different industrial links of the printing and dyeing textile industry generally have the characteristics of high energy consumption and high emission, and have a very high water demand. The low-temperature waste heat carried by the wastewater is difficult to utilize directly and is usually discharged into the environment to cause water thermal pollution and waste of water resources and energy. The wastewater discharged in the printing and dyeing process contains heat energy and water resource reserves. The recycling of part of the waste heat, the purification treatment and recycling use of the wastewater can effectively promote the efficient use of energy and the rational conservation of water resources, and have a positive significance for the solution of economic and environmental problems. However, the temperature of the wastewater discharged in the printing and dyeing process is generally below 40°C, and the heat energy grade carried is low and difficult to utilize directly. The structure of the printing and dyeing wastewater treatment device can be obtained from the invention of a printing and dyeing wastewater treatment device in Chinese patent application No. CN202211590728.5. Although the purified water produced after the printing and dyeing wastewater is treated by the printing and dyeing wastewater treatment device can be utilized to reduce the waste of water resources, the low-temperature waste heat in the printing and dyeing wastewater cannot be directly utilized to produce high-temperature hot water that can be directly used in the printing and dyeing process. Therefore, it is urgent to design a printing and dyeing wastewater recycling system based on a high-efficiency heat collection solar heat pump, which reduces the discharge of wastewater, realizes the recycling of wastewater, effectively reduces the waste of energy, reduces the negative impact of waste heat discharge on the ecological environment, effectively treats the discharged wastewater, and recycles the purified water body according to different working conditions and requirements, so as to effectively reduce the waste of water resources while controlling the pollution discharge. SUMMARY

[0003] The present application relates to the technical field of printing and dyeing wastewater treatment and recycling, and particularly relates to a printing and dyeing wastewater recycling system based on a high-efficiency heat collection solar heat pump.

[0004] The specific technical scheme of the present application is as follows:

[0005] The application discloses a printing and dyeing wastewater recycling system based on a high-efficiency heat collection solar heat pump, which comprises a printing and dyeing process device provided with a hot water inlet and a wastewater outlet, a printing and dyeing wastewater purification treatment device connected with the wastewater outlet, a water distribution valve provided with one inlet and two outlets, a nanofluid configuration device with high heat collection performance, a waste heat grade lifting device based on a solar heat pump, a circulating water heating device, a high-temperature hot water storage device and a flow dynamic regulation and distribution device; the inlet of the water distribution valve is connected with the printing and dyeing wastewater recycling device; the two outlets of the water distribution valve are respectively connected with the nanofluid configuration device and the circulating water heating system device; and the water distribution valve is a water distribution electromagnetic valve.

[0006] As preferred, the nanofluid configuration device with high heat collection performance comprises a nanofluid dilution container provided with a first inlet connected with one outlet of the water distribution valve, a first flow regulating valve with an inlet connected with an outlet of the nanofluid dilution container, a second flow regulating valve with an inlet connected with a second inlet of the nanofluid dilution container and a nanofluid storage tank connected with an outlet of the second flow regulating valve; the nanofluid storage tank is a nanofluid storage tank; and the first flow regulating valve and the second flow regulating valve are electric flow regulating valves.

[0007] As preferred, the nanofluid dilution container comprises a tank body, upper and lower backflow prevention baffles arranged in the tank body and a uniform dilution space arranged at the lower side of the lower backflow prevention baffle; the first inlet is located at the upper end of the tank body, the second inlet is located at the side wall of the tank body and between the upper and lower backflow prevention baffles, and the outlet is located at the lower end of the tank body and communicates with the uniform dilution space; the upper and lower backflow prevention baffles are mature products of the prior art backflow prevention baffle.

[0008] As preferred, the waste heat grade lifting device based on the solar heat pump comprises a solar heat collector, a compressor, a heat exchange device and a throttling device; the inlet of the solar heat collector is connected with the outlet of the first flow regulating valve and the outlet of the throttling device respectively, the heat source inlet of the heat exchange device is connected with the outlet of the compressor, and the heat source outlet of the heat exchange device is connected with the inlet of the throttling device; the throttling device is a standard orifice throttling device, and the heat exchange device is a plate heat exchanger or a tube heat exchanger.

[0009] As preferred, the circulating water heating device comprises a heating system valve with an inlet connected with the other outlet of the water distribution valve, a heating system water storage tank and a heat exchange device; the outlet of the heating system valve is connected with the cold source inlet of the heat exchange device, and the cold source outlet of the heat exchange device is connected with the inlet of the heating system water storage tank; and the heating system valve is an electromagnetic valve.

[0010] As preferred, the solar energy collector comprises: a heat insulation base, a heat collecting pipeline mounted on the upper end of the heat insulation base; the heat insulation base is made of heat insulation material, used for reducing heat loss and bearing the heat collecting pipeline; the heat collecting pipeline is made of transparent high-temperature resistant material, used for efficiently absorbing solar energy when the nanofluid flows through the heat collecting pipeline.

[0011] As preferred, the high-temperature hot water storage device comprises: a flow regulating valve connected with the outlet of the heating system water storage tank at one end, a high-temperature hot water storage tank connected with the flow regulating valve at the other end, and a high-temperature water distribution pipeline connected with the outlet of the high-temperature hot water storage tank at one end through a connecting pipe; the other end of the high-temperature water distribution pipeline is connected with the hot water inlet; the high-temperature water distribution pipeline is used for reapplying the purified and heated water to the printing and dyeing process; the flow regulating valve is an electric flow regulating valve.

[0012] As preferred, the flow dynamic regulation and control distribution device comprises: a heating system water storage tank, an electronic flow valve connected between the purified treatment water storage tank and the inlet of the water distribution valve in series, and an adjustment controller electrically connected with the temperature controller arranged on the electronic flow valve and the heating system water storage tank; the adjustment controller is used for controlling the temperature measurement and data feedback of the heating system water storage tank, and dynamically controlling the flow through the electronic flow valve according to the temperature.

[0013] As preferred, the printing and dyeing wastewater purification treatment device comprises: an acid-base balance device, a wastewater precipitation device, a filter device, a water quality monitoring device and a purified treatment water storage tank connected in sequence; the inlet of the acid-base balance device is connected with the outlet of the wastewater, and the outlet of the purified treatment water storage tank is connected with the inlet of the water distribution valve; the acid-base balance device, the wastewater precipitation device, the filter device, the water quality monitoring device and the purified treatment water storage tank are all mature products of prior art.

[0014] Working principle: through the electric compression heat pump technology comprehensive heat pump on the heat source quality improvement and reasonable use of electric energy, has important application value; the heat pump technology driven by electricity, through the joint operation of different components in the heat pump system, through the heat cycle, the circulating medium plays a role in energy quality improvement, and uses heat exchange equipment to use high-grade heat energy for high-temperature hot water production, etc., can realize the goal of waste heat recovery, supply production link reuse; however, the process of circulating medium compression needs external power input, when single wastewater waste heat is used as heat source, the generated electric energy load will increase the power consumption pressure; solar heat pump is a solar heat pump system that uses solar collector as the evaporator of the heat pump, uses solar energy as the heat source of the heat pump, and through the coupling of the high-temperature heat pump technology of the solar heat collector, the heat source grade is improved, the heat energy is recycled, the electric energy consumption is reduced, and the share of clean energy utilization is increased. For the reuse of printing and dyeing industry wastewater, on the basis of water purification, cooperate with the actual demand of multiple technical links to carry out shunting and treatment, couple the technical links of solar heat collection and heat pump circulation, apply the purified water to solar heat collection on one hand and deliver it to the corresponding production link as circulating water on the other hand, integrate it in the waste heat utilization system, supplement the production water while cooperating with waste heat recovery, realize the recycling of water resources, and reduce the external demand for water consumption.

[0015] Compared with the prior art, the beneficial effects of the printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump are that the different wastewater treatment processes and devices are connected by the connecting pipe, the wastewater discharged by the printing and dyeing industry is purified through chemical treatment, physical filtration and other links, and is applied to different branches through the water distribution valve, so that the wastewater discharge is reduced, the wastewater is reused, the energy waste is effectively reduced, the negative influence of waste heat discharge on the ecological environment is reduced, the discharged wastewater is effectively treated, and the recycling of purified water is realized according to different working conditions and requirements. The water resource waste can be effectively reduced while the pollution discharge is controlled. Part of the purified water is used to configure a nano-fluid solution with a certain concentration, the solar energy is efficiently absorbed through the solar heat collection device, and the heat energy is stored through the temperature rise of the working medium. In the waste heat grade improvement device based on the solar heat pump, the compressor and the heat exchange device are used to comprehensively utilize the waste heat carried in the wastewater, the obtained solar energy and the supplemented electric energy, improve the temperature of the low-grade waste heat, reduce pollution and reduce the dependence on traditional fossil energy. The heat obtained by the solar heat pump is used to heat another part of the purified water to realize high-temperature hot water production, which is re-applied to the corresponding process link of the printing and dyeing industry, and the energy waste and water waste are reduced, so that good economic and environmental benefits are obtained. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure diagram of the printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump.

[0017] Figure 2 is a structural schematic diagram of a nanofluid dilution container;

[0018] Figure 3 is a structural schematic diagram of a solar heat collecting device.

[0019] In the figure: hot water inlet 1, waste water outlet 2, printing and dyeing process device 3, water distribution valve 4, acid-base balance device 5, waste water precipitation device 6, filtration device 7, water quality monitoring device 8, purification treatment water tank 9, first inlet 10, nanofluid dilution container 11, outlet 12, first flow regulating valve 13, second inlet 14, second flow regulating valve 15, nanofluid storage tank 16, tank body 17, upper anti-backflow partition 18, lower anti-backflow partition 19, uniform dilution space 20, solar heat collector 21, compressor 22, heat exchange device 23, throttling device 24, heat source inlet 25, heat source outlet 26, heating system valve 27, heating system water storage tank 28, cold source inlet 29, cold source outlet 30, heat preservation bottom lining 31, heat collecting pipeline 32, flow regulating valve 33, high-temperature hot water storage tank 34, high-temperature water distribution pipeline 35, electronic flow valve 36, temperature controller 37, adjustment controller 38. DETAILED DESCRIPTION

[0020] The application will be further described below in combination with the drawings.

[0021] As shown in the drawings Figure 1 , the drawings Figure 2 , the drawings Figure 3 : a printing and dyeing waste water recycling system based on a high-efficiency heat collecting solar heat pump, comprising: a printing and dyeing process device 3 provided with a hot water inlet 1 and a waste water outlet 2, a printing and dyeing waste water purification treatment device connected with the waste water outlet 2, a water distribution valve 4 having one inlet and two outlets, a nanofluid configuration device with high heat collecting performance, a waste heat grade raising device based on a solar heat pump, a circulating water heating device, a high-temperature hot water storage device, and a flow dynamic regulation and control distribution device; the inlet of the water distribution valve 4 is connected with the printing and dyeing waste water recycling device through a connecting pipe; the water distribution valve 4 is a water distribution electromagnetic valve.

[0022] The printing and dyeing waste water purification treatment device comprises: an acid-base balance device 5, a waste water precipitation device 6, a filtration device 7, a water quality monitoring device 8 and a purification treatment water tank 9 connected in sequence through connecting pipes; the inlet of the acid-base balance device 5 is connected with the waste water outlet 2 through a connecting pipe, and the outlet of the purification treatment water tank is connected with the inlet of the water distribution valve 4 through a connecting pipe; the acid-base balance device 5, the waste water precipitation device 6, the filtration device 7, the water quality monitoring device 8 and the purification treatment water tank 9 are all mature products of prior art.

[0023] The high heat collection performance nanofluid configuration device comprises: a nanofluid dilution container 11 provided with a first inlet 10 connected with an outlet of a water distribution valve 4 through a connecting pipe, a first flow regulating valve 13 connected with an outlet 12 of the nanofluid dilution container 11 through a connecting pipe, a second flow regulating valve 15 connected with a second inlet 14 of the nanofluid dilution container through a connecting pipe, and a nanofluid storage tank 16 connected with an outlet of the second flow regulating valve 15 through a connecting pipe; the nanofluid storage tank is a nanofluid storage tank; and the first flow regulating valve 13 and the second flow regulating valve 15 are both electric flow regulating valves.

[0024] The nanofluid dilution container 11 comprises: a tank body 17, an upper backflow prevention baffle 18 and a lower backflow prevention baffle 19 arranged in the tank body, and a uniform dilution space 20 arranged at the lower side of the lower backflow prevention baffle 19; the first inlet 10 is located at the upper end of the tank body 17, the second inlet 14 is located at the side wall of the tank body 17 and between the upper backflow prevention baffle 18 and the lower backflow prevention baffle 19, and the outlet 12 is located at the lower end of the tank body 17 and communicates with the uniform dilution space 20; the upper backflow prevention baffle 18 and the lower backflow prevention baffle 19 are mature products of the prior art backflow prevention baffles.

[0025] The solar heat pump-based waste heat grade upgrading device comprises: a solar heat collector 21, a compressor 22, a heat exchange device 23, and a throttling device 24; the inlet of the solar heat collector 21 is connected with the outlet of the first flow regulating valve 13 and the outlet of the throttling device 24 through connecting pipes, the heat source inlet 25 of the heat exchange device 23 is connected with the outlet of the compressor 22 through a connecting pipe, and the heat source outlet 26 of the heat exchange device 23 is connected with the inlet of the throttling device 24 through a connecting pipe; the compressor 22 is a mature product of the prior art, the throttling device 24 is a standard orifice throttling device, and the heat exchange device 23 is a plate heat exchanger.

[0026] The circulating water heating device comprises: a heating system valve 27 connected with another outlet of the water distribution valve 4 through a connecting pipe, a heating system water storage tank 28, and the heat exchange device 23; the outlet of the heating system valve 27 is connected with the cold source inlet 29 of the heat exchange device 23 through a connecting pipe, and the cold source outlet 30 of the heat exchange device 23 is connected with the inlet of the heating system water storage tank 28 through a connecting pipe; the heating system valve 27 is an electromagnetic valve.

[0027] The solar heat collector 21 comprises: a heat preservation bottom lining 31 and a heat collection pipe 32 arranged at the upper end of the heat preservation bottom lining 31; the heat preservation bottom lining 31 is made of a heat preservation material and is used for reducing heat loss and bearing the heat collection pipe 32, and the heat collection pipe 32 is made of a transparent high-temperature-resistant material and is used for efficiently absorbing solar energy when the nanofluid flows through the heat collection pipe 32.

[0028] The high-temperature hot water storage device comprises a flow regulating valve 33 connected with the outlet of the heating system water storage tank 28 through a connecting pipe, a high-temperature hot water storage tank 34 connected with the inlet of the flow regulating valve 33 through a connecting pipe, and a high-temperature water distribution pipeline 35 connected with the outlet of the high-temperature hot water storage tank 34 through a connecting pipe; the other end of the high-temperature water distribution pipeline 35 is connected with the hot water inlet 1 through a connecting pipe; the high-temperature water distribution pipeline 35 is used for reapplying the water treated by purification and heating to the printing and dyeing process; and the flow regulating valve 33 is an electric flow regulating valve.

[0029] The flow dynamic regulation and distribution device comprises a heating system water storage tank 28, an electronic flow valve 36 connected in series between the purification treatment water storage tank 9 and the inlet of the water distribution valve 4, and an adjusting controller 38 electrically connected with the temperature controller 37 arranged on the electronic flow valve 36 and the heating system water storage tank 28; the adjusting controller 38 is used for controlling temperature measurement and data feedback of the heating system water storage tank 28 and dynamically controlling and adjusting the flow through the electronic flow valve 36 according to the temperature.

[0030] In addition to the above-mentioned embodiments, within the scope disclosed in the claims and the specification of the present application, the technical features or technical data of the present application can be reselected and combined to form new embodiments, which can be realized by the skilled in the art without creative labor, and therefore the embodiments of the present application which are not described in detail should be regarded as the specific embodiments of the present application and within the protection scope of the present application.

Claims

1. A printing and dyeing wastewater recycling system based on a high-efficiency heat collection solar heat pump, comprising: The printing and dyeing process device with hot water inlet and waste water outlet is characterized in that the printing and dyeing waste water recycling system based on high-efficiency heat collection solar heat pump further comprises a printing and dyeing waste water purification treatment device connected with the waste water outlet, a water distribution valve with one inlet and two outlets, a nanofluid configuration device with high heat collection performance, a waste heat grade raising device based on solar heat pump, a circulating water heating device, a high-temperature hot water storage device, and a flow dynamic regulation and distribution device; the inlet of the water distribution valve is connected with the printing and dyeing waste water purification treatment device; the two outlets of the water distribution valve are respectively connected with the nanofluid configuration device and the circulating water heating system device; the nanofluid configuration device comprises a nanofluid dilution container with a first inlet connected with one outlet of the water distribution valve, and a first flow regulating valve with an inlet connected with an outlet of the nanofluid dilution container; the waste heat grade raising device based on solar heat pump comprises a solar heat collector, a compressor, a heat exchange device, and an inlet of the solar heat collector connected with an outlet of the first flow regulating valve and an outlet of a throttling device through connecting pipes.

2. The printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump according to claim 1, characterized in that, The nanofluid configuration device with high heat collection performance further comprises a second flow regulating valve with an inlet connected with a second inlet of the nanofluid dilution container, and a nanofluid storage tank connected with an outlet of the second flow regulating valve.

3. The printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump according to claim 2, characterized in that, The nanofluid dilution container comprises a tank body, upper and lower anti-backflow baffles arranged in the tank body, and a uniform dilution space arranged at the lower side of the lower anti-backflow baffle; the first inlet is located at the upper end of the tank body, the second inlet is located at the side wall of the tank body and between the upper and lower anti-backflow baffles, and the outlet is located at the lower end of the tank body and communicates with the uniform dilution space.

4. The printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump according to claim 3, characterized in that, The waste heat grade raising device based on solar heat pump further comprises a throttling device; a heat source inlet of the heat exchange device is connected with an outlet of the compressor, and a heat source outlet of the heat exchange device is connected with an inlet of the throttling device.

5. The printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump according to claim 3, characterized in that, The circulating water heating device comprises a heating system valve with an inlet connected with the other outlet of the water distribution valve, a heating system water storage tank, and a heat exchange device; an outlet of the heating system valve is connected with a cold source inlet of the heat exchange device, and a cold source outlet of the heat exchange device is connected with an inlet of the heating system water storage tank.

6. The printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump according to claim 4, characterized in that, The solar heat collector comprises an insulating bottom lining and a heat collection pipeline arranged at the upper end of the insulating bottom lining.

7. The printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump according to claim 6, characterized in that, The high-temperature hot water storage device comprises a flow regulating valve with one end connected with an outlet of the heating system water storage tank, a high-temperature hot water storage tank with an inlet connected with the other end of the flow regulating valve, and a high-temperature water distribution pipeline with one end connected with an outlet of the high-temperature hot water storage tank through a connecting pipe; the other end of the high-temperature water distribution pipeline is connected with the hot water inlet; the high-temperature water distribution pipeline is used for reapplying the purified and heated water to the printing and dyeing process.

8. The printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump according to claim 7, characterized in that, The flow dynamic regulation and distribution device comprises the heating system water storage tank, an electronic flow valve connected in series between the purification treatment water storage tank and the inlet of the water distribution valve, and an adjustment controller electrically connected with the electronic flow valve and a temperature controller arranged on the heating system water storage tank.

9. The printing and dyeing wastewater recycling system based on the high-efficiency heat collection solar heat pump according to any one of claims 1 to 8, characterized in that, The printing and dyeing wastewater purification treatment device comprises an acid-base balance device, a wastewater precipitation device, a filtering device, a water quality monitoring device and a purification treatment water storage tank connected in sequence; the inlet of the acid-base balance device is connected with the wastewater outlet, and the outlet of the purification treatment water storage tank is connected with the inlet of a water distribution valve.

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