Heat recovery device for printing and dyeing wastewater

Abstract

The utility model discloses a printing and dyeing wastewater heat recovery device which comprises a filter pipe, a middle water pipe is rotatably arranged in the filter pipe, and a spiral blade with filter holes is fixedly connected to the outer side of the middle water pipe and used for filtering impurities and discharging the impurities; the spiral water pipe is fixedly connected to the outer side of the spiral blade, the two ends of the spiral water pipe are connected with the middle water pipe, and the spiral water pipe is used for introducing cold water; the device has the advantages that through the combination of the middle water pipe and the spiral water pipe, cold water and hot water are used for effective heat exchange, so that waste of heat energy is reduced, the energy utilization efficiency is improved, heat is further recovered through the plate heat exchanger, and the device is energy-saving and environment-friendly. Hot water is ensured to be utilized to the maximum extent; the spiral blades and the filtering holes are arranged in the filtering pipe, so that impurities in the printing and dyeing wastewater can be effectively filtered, and the spiral blades can be driven by the water wheel to clean when necessary.

Description

TECHNICAL FIELD

[0001] The utility model relates to the heat recovery technical field of printing and dyeing wastewater, specifically to a heat recovery device of printing and dyeing wastewater. BACKGROUND

[0002] In the water process of industrial textile printing and dyeing, papermaking, etc., the sewage temperature is as high as above 46 DEG C. It is discharged into the sewage treatment tank, seriously affects the aerobic biochemical treatment, and also needs to consume energy to cool it. The heat of the sewage is emitted to the air, causing environmental pollution. And. The discharge of sewage containing heat energy causes energy waste, increases production cost, and a large amount of heat energy is wasted, therefore, the existing enterprises are mostly through heat recovery device to the high temperature sewage of discharging heat energy recovery. These devices can transfer the heat in the waste water to other production links needing heat energy through the heat exchanger, so as to reduce the additional energy consumption, the waste heat water may contain solid particles, these impurities will accumulate on the surface of the heat exchanger, forming a dirt layer. The accumulation of dirt reduces the heat exchange efficiency, so that the heat transfer effect is not ideal, therefore, it needs to be filtered before heat exchange, the existing filter structure is only realized by the filter screen, which cannot filter and heat exchange at the same time, and needs to be regularly stopped for cleaning, affecting the normal work of the equipment. SUMMARY

[0003] The utility model aims at providing a heat recovery device of printing and dyeing wastewater to solve the problems in the above background.

[0004] To achieve the above object, the utility model provides the following technical scheme: a heat recovery device of printing and dyeing wastewater, comprising:

[0005] The filter pipe is internally rotatably provided with a middle water pipe, the outer side of the middle water pipe is fixedly connected with a spiral blade with filter holes, and is used for filtering impurities and discharging impurities;

[0006] The spiral water pipe is fixedly connected to the outer side of the spiral blade, and the two ends of the spiral water pipe are connected with the middle water pipe, and is used for introducing cold water;

[0007] The water tank is fixedly connected to one end of the filter pipe, the inner side of the filter pipe is rotatably connected with a water wheel, the water wheel is fixedly connected with the middle water pipe, and the water tank and the filter pipe are connected through a connecting portion, and are used for controlling the waterway direction;

[0008] The plate heat exchanger is arranged at one end of the filter pipe, and the filter pipe is connected with the plate heat exchanger through a connecting water pipe.

[0009] As preferred, the connecting pipe comprises a connecting pipe two and a connecting pipe three, the connecting pipe two and the connecting pipe three are both U-shaped structures, one end of the connecting pipe two and one end of the connecting pipe three are both connected with the water tank, the other end of the connecting pipe two and the other end of the connecting pipe three are both communicated with the filter pipe, and valves are arranged at both ends of the connecting pipe two.

[0010] As preferred, a centrifugal water pump is further included, a water inlet pipe is fixedly connected to the middle part of the connecting pipe two, and the water inlet pipe is fixedly connected with a water outlet end of the centrifugal water pump.

[0011] As preferred, the two ends of the connecting pipe one are fixedly connected with the top and the bottom of the filter pipe respectively, a collecting cylinder is fixedly connected to the middle part of the connecting pipe one, and a filter cylinder is detachably arranged in the collecting cylinder.

[0012] As preferred, a hot water inlet pipe is fixedly connected to the middle part of the connecting pipe one, the hot water inlet pipe is connected with a hot water inlet of the plate heat exchanger, and a cold water outlet pipe is fixedly connected with a cold water outlet of the plate heat exchanger.

[0013] As preferred, one end of the middle water pipe is connected with a connecting pipe four through a rotary joint, and the connecting pipe four is connected with the cold water outlet pipe.

[0014] As preferred, the other end of the middle water pipe, which is away from the connecting pipe four, is connected with a cold water pipe through a rotary joint, and the cold water pipe is connected with a cold water inlet of the connecting pipe four.

[0015] Compared with the prior art, the device has the advantages that: the combination of the middle water pipe and the spiral water pipe can effectively exchange heat between cold water and hot water, thereby reducing the waste of heat energy and improving the energy utilization efficiency; the spiral blades and the filter holes arranged in the filter pipe can not only effectively filter impurities in the printing and dyeing wastewater, but also can be cleaned by the water wheel driving the spiral blades when necessary; the rotation of the spiral blades in the filter pipe helps to discharge impurities and ensure the smoothness of the filtering process; the arrangement of the collecting cylinder and the detachable filter cylinder can easily clean the equipment when necessary, thereby ensuring the stability and effectiveness in long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the device;

[0017] Figure 2 It is a position structural schematic view of the collecting cylinder of the device;

[0018] Figure 3 It is a structural schematic view of the spiral blade of the device;

[0019] Figure 4The utility model discloses a filter cartridge's structure schematic view.

[0020] In the drawing: 1, plate heat exchanger; 2, centrifugal water pump; 3, water inlet pipe; 4, connecting water pipe two; 5, filter pipe; 6, connecting water pipe three; 7, water tank; 8, water wheel; 9, spiral blade; 10, filter hole; 11, spiral water pipe; 12, middle water pipe; 13, connecting water pipe one; 14, collection cylinder; 15, filter cartridge; 16, connecting water pipe four; 17, hot water inlet pipe; 18, cold water outlet pipe; 19, cold water pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] Please refer to Figure 1 、 2 , 3, 4, the utility model provides a technical scheme: a kind of heat recovery device of printing and dyeing wastewater, it include: the filter pipe 5 of outer side being wrapped with polyurethane foam material, the inside rotation of filter pipe 5 is provided with middle water pipe 12, the outside of middle water pipe 12 is fixedly connected with the spiral blade 9 with filter hole 10, for filtering impurity and discharging impurity;Spiral water pipe 11 is fixedly connected on the outside of spiral blade 9, and the both ends of spiral water pipe 11 are connected with middle water pipe 12, and the middle part of middle water pipe 12 is solid, and two points are hollow, so that cold water enters spiral water pipe 11 from the one end of middle water pipe 12, then is discharged to the other end of middle water pipe 12 by spiral water pipe 11 and then is discharged;The water tank 7 of circular structure is fixedly connected at one end of filter pipe 5, and water wheel 8 is rotationally connected in the inside of filter pipe 5, and water wheel 8 is fixedly connected with middle water pipe 12, and one end of middle water pipe 12 passes out from the middle part of water tank 7 and is rotationally connected with water tank 7, and water tank 7 is connected between filter pipe 5 by connecting portion, for controlling waterway direction;Plate heat exchanger 1 is placed at one end of filter pipe 5, and plate heat exchanger 1 can select D-3689 mode of Daniel brand, and filter pipe 5 is connected with plate heat exchanger 1 by connecting water pipe one 13.

[0023] It is to be noted that in the embodiment, the printing and dyeing wastewater enters the filter pipe 5 through the connecting part. The cold water for heat exchange enters the spiral water pipe 11 through the middle water pipe 12 to exchange heat with the hot water in the filter pipe 5. The water in the filter pipe 5 is transported forward through the filter holes 10 in the middle of the spiral blades 9 and the water paths in the filter pipe 5 separated by the spiral blades 9. During the transportation, the filter holes 10 filter the printing and dyeing wastewater, and the water exchanges heat with the spiral water pipe 11. The printing and dyeing wastewater filtered by the filter pipe 5 enters the plate heat exchanger 1 to exchange heat. When the impurities in the filter pipe 5 need to be discharged, the connecting part switches the water path, so that the printing and dyeing wastewater first enters the water tank 7 and drives the water wheel 8 to rotate under the action of water pressure. The water wheel 8 drives the spiral blades 9 to rotate through the middle water pipe 12. At the same time, the water in the water tank 7 enters the filter pipe 5, so as to realize the flushing and spiral discharge.

[0024] In one embodiment, as shown in Figure 1 、 2 , the connecting part comprises the connecting water pipe two 4 and the connecting water pipe three 6. The connecting water pipe two 4 and the connecting water pipe three 6 are both U-shaped structures. One end of the connecting water pipe two 4 and one end of the connecting water pipe three 6 are both connected with the water tank 7. The other end of the connecting water pipe two 4 and the other end of the connecting water pipe three 6 are both communicated with the filter pipe 5. Valves are arranged at both ends of the connecting water pipe two 4.

[0025] It is to be noted that in the embodiment, the wastewater enters the filter pipe 5 through one end of the connecting water pipe two 4. The valve connecting the connecting water pipe two 4 with the water tank 7 is closed, so as to transport the wastewater into the filter pipe 5 for heat exchange. When the middle water pipe 12 needs to be driven, the valve connecting the connecting water pipe two 4 with the filter pipe 5 is closed, and the valve connecting the connecting water pipe two 4 with the water tank 7 is opened, so that the wastewater enters the water tank 7 and drives the water wheel 8 to rotate from one side under the action of water pressure. The water wheel 8 drives the middle water pipe 12 to rotate, and then the water in the water tank 7 enters the filter pipe 5 through the connecting water pipe three 6.

[0026] In one embodiment, as shown in Figure 1 、 2 , 3, the connecting part further comprises a centrifugal water pump 2. A water inlet pipe 3 is fixedly connected to the middle of the connecting water pipe two 4. The water inlet pipe 3 is fixedly connected to the water outlet end of the centrifugal water pump 2.

[0027] It is to be noted that in the embodiment, the input end of the centrifugal water pump 2 is connected with the printing and dyeing wastewater. The printing and dyeing wastewater is sent into the connecting water pipe two 4 through the water inlet pipe 3 by the centrifugal water pump 2, and then enters the filter pipe 5 through the connecting water pipe two 4 for heat recovery.

[0028] In one embodiment, as shown in Figure 2 、 4As shown, the two ends of the connecting water pipe 1 3 are fixedly connected to the top and bottom of the filter pipe 5, and the middle part of the connecting water pipe 1 3 is fixedly connected to the collecting cylinder 14, and the inside of the collecting cylinder 14 is detachably installed with the filter cylinder 15.

[0029] It should be noted that in this embodiment, after the wastewater enters the inside of the water tank 7 through the connecting water pipe 2 4, it enters the filter pipe 5 through the connecting water pipe 3 6, at this time, the valve outside the connecting water pipe 1 3 above the filter pipe 5 is closed, the valve outside the connecting water pipe 1 3 below the filter pipe 5 is opened, so that the wastewater in the filter pipe 5 and the impurities transported by the spiral blade 9 enter the collecting cylinder 14, and are filtered by the filter cylinder 15, and the filtered wastewater enters the plate heat exchanger 1 through the connecting water pipe 1 3 and the hot water inlet pipe 1 7, after the filtering is completed, the valves above and below the collecting cylinder 14 are closed, the valve outside the connecting water pipe 1 3 above the filter pipe 5 is opened, and the bolt outside the collecting cylinder 14 is detached by using a wrench, so that the collecting cylinder 14 is taken down, and the filter cylinder 15 is taken down for cleaning.

[0030] In one embodiment, as shown in Figure 1 , 2 As shown, the middle part of the connecting water pipe 1 3 is fixedly connected to the hot water inlet pipe 1 7, the hot water inlet pipe 1 7 is connected to the hot water inlet of the plate heat exchanger 1, the cold water outlet pipe 1 8 is fixedly connected to the cold water outlet of the plate heat exchanger 1, one end of the middle water pipe 1 2 is connected to the connecting water pipe 4 1 6 through a rotary joint, the connecting water pipe 4 1 6 is connected to the cold water outlet pipe 1 8, and the cold water pipe 1 9 is connected to the connecting water pipe 4 1 6 through a rotary joint.

[0031] It should be noted that in this embodiment, the hot water inlet and the cold water outlet are arranged above one side of the plate heat exchanger 1, the hot water outlet and the cold water inlet are arranged below one side of the plate heat exchanger 1, the middle part of the connecting water pipe 1 3 is connected to the hot water inlet through the hot water inlet pipe 1 7, so that the hot water is sent into the plate heat exchanger 1 through the hot water inlet pipe 1 7, and the hot water is discharged through the lower hot water outlet after heat exchange. The cold water enters the cold water inlet through the pipeline at the same time, and is transported into the middle water pipe 1 2 through the rotary joint by the cold water pipe 1 9, and then enters the heat preservation equipment after circulating in the spiral water pipe 1 1 and entering the cold water outlet pipe 1 8.

[0032] In the description of the utility model, need understanding is, the term "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as a restriction on the utility model.

[0033] In addition, the terms "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features limited by "first", "second", "third", "fourth" can be explicitly or implicitly include at least one feature.

[0034] In the utility model, unless otherwise expressly provided and limited, the terms "installation", "arrangement", "connection", "fixing", "screw connection" and so on should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrated, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or interaction relationship between two elements, unless otherwise expressly limited, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that the embodiments can be changed, modified, replaced and changed in various ways without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A heat recovery device for printing and dyeing wastewater, characterized by: It includes: Filtering pipe (5), the inside of the filtering pipe (5) is rotatably provided with a middle water pipe (12), the outside of the middle water pipe (12) is fixedly connected with a spiral blade (9) with filtering holes (10), which is used for filtering impurities and discharging impurities; Spiral water pipe (11), the spiral water pipe (11) is fixedly connected to the outside of the spiral blade (9), and the two ends of the spiral water pipe (11) are connected with the middle water pipe (12), which is used for introducing cold water; Water tank (7), the water tank (7) is fixedly connected to one end of the filtering pipe (5), the inside of the filtering pipe (5) is rotatably connected with a water wheel (8), the water wheel (8) is fixedly connected with the middle water pipe (12), and the water tank (7) is connected with the filtering pipe (5) through a connecting portion, which is used for controlling the direction of waterway; Plate heat exchanger (1), the plate heat exchanger (1) is arranged at one end of the filtering pipe (5), and the filtering pipe (5) is connected with the plate heat exchanger (1) through a connecting water pipe one (13).

2. A heat recovery device for printing and dyeing wastewater according to claim 1, characterized in that: The connecting portion includes a connecting water pipe two (4) and a connecting water pipe three (6), the connecting water pipe two (4) and the connecting water pipe three (6) are both U-shaped structures, one end of the connecting water pipe two (4) and one end of the connecting water pipe three (6) are both connected with the water tank (7), the other end of the connecting water pipe two (4) and the other end of the connecting water pipe three (6) are both communicated with the filtering pipe (5), and the two ends of the connecting water pipe two (4) are both provided with valves.

3. A heat recovery device for printing and dyeing wastewater according to claim 2, characterized in that: It also includes a centrifugal water pump (2), a water inlet pipe (3) is fixedly connected to the middle of the connecting water pipe two (4), and the water inlet pipe (3) is fixedly connected with the water outlet end of the centrifugal water pump (2).

4. The heat recovery device for printing and dyeing wastewater according to claim 1, characterized in that: The two ends of the connecting water pipe one (13) are respectively fixedly connected with the top and the bottom of the filtering pipe (5), the middle of the connecting water pipe one (13) is fixedly connected with a collecting cylinder (14), and the inside of the collecting cylinder (14) is detachably installed with a filtering cylinder (15).

5. A heat recovery device for printing and dyeing wastewater according to claim 1, characterized in that: The middle of the connecting water pipe one (13) is fixedly connected with a hot water inlet pipe (17), the hot water inlet pipe (17) is connected with the hot water inlet of the plate heat exchanger (1), and the cold water outlet of the plate heat exchanger (1) is fixedly connected with a cold water outlet pipe (18).

6. A heat recovery device for printing and dyeing wastewater according to claim 5, characterized in that: One end of the middle water pipe (12) is connected with a connecting water pipe four (16) through a rotary joint, and the connecting water pipe four (16) is connected with the cold water outlet pipe (18).

7. A heat recovery device for printing and dyeing wastewater according to claim 6, characterized in that: The end of the middle water pipe (12) away from the connecting water pipe four (16) is connected with a cold water pipe (19) through a rotary joint, and the cold water pipe (19) is connected with the cold water inlet of the connecting water pipe four (16).

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