Energy-saving system for viscose aftertreatment

Abstract

The utility model discloses an energy-saving system for viscose after-treatment, which belongs to the technical field of viscose production and is characterized in that circulating water (70 DEG C) which is cut off from a water circulating tank and is directly discharged to a trench is used as a heating source of a plate heat exchanger to heat cooling water (30 DEG C) of an air compressor, and a temperature sensor on a water return pipe monitors the temperature of return water in real time; in order to guarantee the temperature in the water return pipe, the water inlet amount of cooling water of the air compressor is adjusted in real time. According to the utility model, the heat in the viscose aftertreatment is reasonably utilized, and the energy consumption of the viscose aftertreatment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of viscose production, and particularly relates to an energy-saving system for viscose post-processing. Background Art

[0002] Viscose fiber can not only make up for the deficiency of natural fiber in quantity, but also surpass natural fiber and synthetic fiber in some aspects of quality. It can not only be used as clothing material and enrich the variety of textile patterns, but also has a wide range of uses in industry, agriculture, national defense and scientific research.

[0003] The viscose fiber post-processing circulating water uses a second-floor half-storage tank. The main sources of soft water in the tank are superheated soft water from the direct cooling system (50°C), dryer return water (50°C), and air compressor cooling water (30°C). Due to low production, the dryer temperature control is low, and the return water temperature is low and the amount is small, resulting in insufficient liquid level in the first-floor return tank. Soft water needs to be replenished to ensure the liquid level in the second-floor half-storage tank. The replenished soft water is relatively low in temperature, and to meet the process requirements for post-processing circulating water, it needs to be heated, which increases steam consumption. The cut-off water circulation tank is in a long-term overflow state, with a temperature of 70°C, and steam consumption in the refining section reaches 5 t / h. Utility Model Content

[0004] To address the high energy consumption of viscose fiber post-processing in existing technologies, this utility model provides an energy-saving viscose post-processing system. This system uses the circulating water (70°C) that was previously cut off from the water circulation tank and discharged directly into the drain as a heat source for a plate heat exchanger to heat the air compressor cooling water (30°C). A temperature sensor on the return water pipe monitors the return water temperature in real time, and the air compressor cooling water intake is adjusted to maintain the return water temperature. This utility model rationally utilizes the heat generated during viscose post-processing, reducing energy consumption in viscose fiber post-processing.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] An energy-saving system for viscose post-processing includes a plate heat exchanger and a temperature control unit. The plate heat exchanger is provided with a heating liquid inlet, a heating liquid outlet, a medium inlet, and a medium outlet. The heating liquid inlet is connected to a circulating water inlet pipe, the circulating water inlet pipe is provided with a filter assembly, the heating liquid outlet is connected to a circulating water outlet pipe, the medium inlet is connected to an air compressor cooling water inlet pipe, and the medium outlet is connected to a return water tank via a return pipe. The temperature control unit includes a DCS, an air compressor cooling water flow regulating valve, and a temperature sensor. The air compressor cooling water flow regulating valve is provided on the air compressor cooling water inlet pipe, and the temperature sensor is provided on the return pipe. The DCS regulates the water inlet amount of the air compressor cooling water inlet pipe via the air compressor cooling water flow regulating valve according to the temperature detected by the temperature sensor.

[0007] Preferably, a circulating water feed valve is provided on the circulating water inlet pipe.

[0008] Preferably, it also includes an alkali washing component, which includes an alkali liquid tank and an alkali liquid feed valve. The alkali liquid tank is connected to the cleaning liquid inlet on the plate heat exchanger through an alkali liquid inlet pipe. A cleaning liquid outlet is provided on the plate heat exchanger, and the alkali liquid feed valve is provided on the alkali liquid inlet pipe.

[0009] Preferably, the filter assembly includes a filter barrel and a filter box connected in sequence.

[0010] Preferably, the mesh diameter of the filter screen in the filter barrel is larger than the mesh diameter of the filter screen in the filter box.

[0011] Preferably, a flow meter is also provided on the cooling water inlet pipe of the air compressor.

[0012] Preferably, the alkali solution tank is provided with a stirring device.

[0013] Preferably, the stirring device includes a stirring motor, a stirring shaft and a stirring paddle, the stirring motor is arranged above the alkali liquid tank, the output end of the stirring motor is connected to the stirring shaft, the stirring shaft penetrates into the alkali liquid tank, and the stirring paddle is arranged at the lower end of the stirring shaft.

[0014] Preferably, a feed port and a water inlet pipe are further provided above the alkali solution tank.

[0015] Preferably, a material cover is provided above the feeding port.

[0016] The beneficial effects of this technical solution are as follows:

[0017] This utility model provides an energy-saving system for viscose post-processing. This system uses circulating water (70°C), previously shut off from the water circulation tank and discharged directly into the drain, as a heat source for a plate heat exchanger to heat air compressor cooling water (30°C). A temperature sensor on the return pipe monitors the return water temperature in real time, adjusting the compressor cooling water intake to maintain the return pipe temperature. This system effectively utilizes heat from viscose post-processing, reducing energy consumption in viscose fiber post-processing.

[0018] 2. The utility model provides an energy-saving system for viscose post-processing. When the plate heat exchanger is blocked and cannot heat the air compressor cooling water, the DCS controls the alkali liquid feed valve to perform online alkali cleaning on the plate heat exchanger.

[0019] 3. The utility model provides an energy-saving system for viscose post-processing, which filters circulating water through a filter barrel and a filter box with two filter screens of different mesh diameters to avoid clogging of the plate heat exchanger.

[0020] 4. The utility model provides an energy-saving system for viscose post-processing, wherein caustic soda is added through a feed port, water is added through a water inlet pipe, and alkaline solution is prepared through a stirring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Among them: 1. Plate heat exchanger; 101. Heating liquid inlet; 102. Heating liquid outlet; 103. Medium inlet; 104. Medium outlet; 105. Cleaning liquid inlet; 106. Cleaning liquid outlet; 2. Temperature control unit; 21. Air compressor cooling water flow regulating valve; 22. Temperature sensor; 3. Circulating water inlet pipe; 4. Filter assembly; 41. Filter barrel; 42. Filter box; 5. Circulating water outlet pipe; 6. Air compressor cooling water inlet pipe; 7. Return pipe; 8. Return tank; 9. Alkali liquid tank; 91. Feeding port; 92. Water inlet pipe; 93. Material cover; 10. Alkali liquid feed valve; 11. Alkali liquid inlet pipe; 12. Flow meter; 13. Stirring device; 131. Stirring motor; 132. Stirring shaft; 133. Stirring paddle; 14. Circulating water feed valve. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the embodiments, but the embodiments of the present invention are not limited thereto.

[0024] Example 1

[0025] like Figure 1 As shown, an energy-saving system for viscose post-processing includes a plate heat exchanger 1 and a temperature control unit 2. The plate heat exchanger 1 is provided with a heating liquid inlet 101, a heating liquid outlet 102, a medium inlet 103, and a medium outlet 104. The heating liquid inlet 101 is connected to the circulating water inlet pipe 3, and the circulating water inlet pipe 3 is provided with a filter assembly 4. The heating liquid outlet 102 is connected to the circulating water outlet pipe 5. The medium inlet 103 is connected to the air compressor cooling water inlet pipe 6, and the medium outlet 104 is connected to the return water tank 8 via a return pipe 7. The temperature control unit 2 includes a DCS, an air compressor cooling water flow regulating valve 21, and a temperature sensor 22. The air compressor cooling water flow regulating valve 21 is provided on the air compressor cooling water inlet pipe 6, and the temperature sensor 22 is provided on the return pipe 7. The DCS adjusts the water inlet amount of the air compressor cooling water inlet pipe 6 through the air compressor cooling water flow regulating valve 21 according to the temperature detected by the temperature sensor 22.

[0026] Example 2

[0027] The difference between this embodiment and embodiment 1 is that a circulating water feed valve 14 is provided on the circulating water inlet pipe 3 .

[0028] The system also includes an alkali wash assembly, comprising an alkali liquid tank 9 and an alkali liquid feed valve 10. The alkali liquid tank 9 is connected to a cleaning liquid inlet 105 on the plate heat exchanger 1 via an alkali liquid inlet pipe 11. The plate heat exchanger 1 is provided with a cleaning liquid outlet 106. The alkali liquid feed valve 10 is provided on the alkali liquid inlet pipe 11. When the temperature detected by the temperature sensor 22 is lower than the set value, the DCS controls the circulating water feed valve 14 to close and simultaneously opens the alkali liquid feed valve 10.

[0029] The filter assembly 4 includes a filter barrel 41 and a filter box 42 connected in sequence.

[0030] The mesh diameter of the filter screen in the filter barrel 41 is larger than the mesh diameter of the filter screen in the filter box 42 .

[0031] Wherein, a flow meter 12 is also provided on the air compressor cooling water inlet pipe 6 .

[0032] Wherein, the alkali liquid tank 9 is provided with a stirring device 13 .

[0033] Among them, the stirring device 13 includes a stirring motor 131, a stirring shaft 132 and a stirring paddle 133. The stirring motor 131 is arranged above the alkali liquid tank 9. The output end of the stirring motor 131 is connected to the stirring shaft 132. The stirring shaft 132 penetrates into the alkali liquid tank 9, and the stirring paddle 133 is arranged at the lower end of the stirring shaft 132.

[0034] A feed port 91 and a water inlet pipe 92 are further provided above the alkali solution tank 9 .

[0035] A material cover 93 is provided above the feeding port 91 .

[0036] The beneficial effects of this technical solution are as follows:

[0037] 1. This utility model provides an energy-saving system for viscose post-processing. This system uses circulating water (70°C), previously cut off from the water circulation tank and discharged directly into the drain, as a heat source in a plate heat exchanger 1 to heat air compressor cooling water (30°C). A temperature sensor 22 on a return pipe 7 monitors the return water temperature in real time, adjusting the compressor cooling water intake to maintain the return pipe 7 temperature. This system rationally utilizes heat from viscose post-processing, reducing energy consumption in viscose fiber post-processing.

[0038] 2. The utility model provides an energy-saving system for viscose post-processing. When the plate heat exchanger 1 is blocked and cannot heat the air compressor cooling water, the DCS controls the alkali liquid feed valve 10 to perform online alkali cleaning on the plate heat exchanger 1.

[0039] 3. The present invention provides an energy-saving system for viscose post-processing, which filters circulating water through a filter barrel 41 and a filter box 42 with two filter screens of different mesh diameters to prevent the plate heat exchanger 1 from being blocked.

[0040] 4. The present invention provides an energy-saving system for viscose post-processing, wherein caustic soda is added through the feed port 91 , water is added through the water inlet pipe 92 , and the alkali solution is prepared through the stirring device 13 .

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention falls within the scope of protection of the present invention.

Claims

1. An energy-saving system for viscose post-processing, characterized by: The invention comprises a plate heat exchanger (1) and a temperature control unit (2), wherein the plate heat exchanger (1) is provided with a heating liquid inlet (101), a heating liquid outlet (102), a medium inlet (103) and a medium outlet (104), wherein the heating liquid inlet (101) is connected to a circulating water inlet pipe (3), wherein a filter assembly (4) is provided on the circulating water inlet pipe (3), wherein the heating liquid outlet (102) is connected to a circulating water outlet pipe (5), wherein the medium inlet (103) is connected to an air compressor cooling water inlet pipe (6), wherein the medium outlet (104) is connected to a cooling water outlet pipe (7) of a cooling water supply unit (8), wherein the medium outlet (105) is connected to a cooling water outlet pipe (9) of a cooling water supply unit (106), wherein the medium inlet (106) is connected to a cooling water outlet pipe (107) of a cooling water supply unit (110). (104) is connected to the return water tank (8) through the return water pipe (7), and the temperature control unit (2) includes a DCS, an air compressor cooling water flow regulating valve (21) and a temperature sensor (22), wherein the air compressor cooling water flow regulating valve (21) is arranged on the air compressor cooling water inlet pipe (6), and the temperature sensor (22) is arranged on the return water pipe (7). The DCS adjusts the water inlet amount of the air compressor cooling water inlet pipe (6) through the air compressor cooling water flow regulating valve (21) according to the temperature detected by the temperature sensor (22).

2. The energy-saving system for viscose post-processing according to claim 1, characterized in that: A circulating water feed valve (14) is provided on the circulating water inlet pipe (3).

3. The energy-saving system for viscose post-processing according to claim 2, characterized in that: The invention also includes an alkali washing component, which includes an alkali liquid tank (9) and an alkali liquid feed valve (10). The alkali liquid tank (9) is connected to a cleaning liquid inlet (105) on the plate heat exchanger (1) through an alkali liquid inlet pipe (11). A cleaning liquid outlet (106) is provided on the plate heat exchanger (1). The alkali liquid feed valve (10) is provided on the alkali liquid inlet pipe (11).

4. The energy-saving system for viscose post-processing according to claim 3, characterized in that: The filter assembly (4) comprises a filter barrel (41) and a filter box (42) connected in sequence.

5. The energy-saving system for viscose post-processing according to claim 4, characterized in that: The mesh diameter of the filter screen in the filter barrel (41) is larger than the mesh diameter of the filter screen in the filter box (42).

6. The energy-saving system for viscose post-processing according to claim 5, characterized in that: A flow meter (12) is also provided on the air compressor cooling water inlet pipe (6).

7. The energy-saving system for viscose post-processing according to claim 6, characterized in that: The alkali solution tank (9) is provided with a stirring device (13).

8. The energy-saving system for viscose post-processing according to claim 7, characterized in that: The stirring device (13) comprises a stirring motor (131), a stirring shaft (132) and a stirring paddle (133); the stirring motor (131) is arranged above the alkali liquid tank (9); the output end of the stirring motor (131) is connected to the stirring shaft (132); the stirring shaft (132) penetrates into the alkali liquid tank (9); and the stirring paddle (133) is arranged at the lower end of the stirring shaft (132).

9. The energy-saving system for viscose post-processing according to claim 8, characterized in that: A feed port (91) and a water inlet pipe (92) are also provided above the alkali solution tank (9).

10. The energy-saving system for viscose post-processing according to claim 9, characterized in that: A material cover (93) is provided above the feeding port (91).

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