Device for recycling heat energy of methylal

Abstract

The utility model discloses a methylal heat energy recycling device which comprises an inner box and a first cold water pipe, and a circulation mechanism is installed on the outer wall of the inner box so that waste water in the middle area of the inner box can move to the outer side of the first cold water pipe and is used for shortening the distance between the waste water in the middle area of the inner box and the first cold water pipe. The device is reasonable in design structure, the heat conduction pipe can be wound outside the first cold water pipe, waste water in the middle area, far away from the first cold water pipe, of the inner box is driven by the driving assembly to move into the heat conduction pipe, and the heat conduction pipe is in winding contact with the first cold water pipe, so that the contact area with the first cold water pipe is increased; meanwhile, the distance between waste water in methylal production and the first cold water pipe is reduced, so that the distance between heat conduction is reduced, the conduction efficiency is improved, and the problems that the distance between the middle area of a box body of a methylal heat energy recycling device and the cold water pipe is long, heat conduction is not facilitated, and the heat recycling effect is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat energy recovery and utilization, in particular to a methylal heat energy recovery and utilization device. Background Art

[0002] During the production process of methylal, a large amount of heat will be generated, and a certain amount of wastewater will be produced. These wastewaters usually store a large amount of heat energy. In order to avoid wasting resources, the heat energy in the wastewater is generally recovered and reused through waste heat recovery devices.

[0003] The Chinese utility model patent with publication number CN215638984U discloses a waste heat recovery and utilization device for methylal production. The device introduces waste water into a treatment frame, and at the same time, a groove is opened on the treatment frame, and a plurality of cold water pipes are arranged in the groove. Then, a heat conduction sheet is arranged on the cold water pipe, so that the heat in the waste water is first transferred to the treatment frame, and then the heat on the treatment frame is transferred to the cold water pipe through the heat conduction sheet to heat the cold water and recover the heat for reuse. However, since the cold water pipe is wound around the treatment frame, the heat in the middle area of ​​the treatment frame needs to be first conducted toward the side wall of the treatment frame, and then conducted to the cold water pipe in turn to heat the water inside the cold water pipe, so that the heat in the middle area of ​​the treatment frame is relatively large relative to the thickness of the cold water pipe, which is not conducive to the conduction of heat in the middle area and affects the recovery effect of heat energy in the waste water. For this reason, we provide a methylal heat energy recovery and utilization device to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a methylal heat energy recovery and utilization device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A methylal heat energy recovery and utilization device comprises an inner box, a first cold water pipe is wound around the outer wall of the inner box, the heat released by the inner box is used to heat the water in the first cold water pipe, and a circulation mechanism is installed on the outer wall of the inner box to move the waste water in the middle area of ​​the inner box to the outside of the first cold water pipe, so as to shorten the distance between the waste water in the middle area of ​​the inner box and the first cold water pipe;

[0007] The circulation mechanism includes a driving component for pumping water, the input end of the driving component is connected to the middle part of the bottom of the inner box, the output end of the driving component is connected to a first water inlet pipe, the top end of the first water inlet pipe is connected to a first connecting ball, the outer wall of the first connecting ball is connected to a heat conduction pipe, one end of the heat conduction pipe is connected to the inside of the first connecting ball, the heat conduction pipe is spirally wound along the first cold water pipe on the outside of the first cold water pipe, the other end of the heat conduction pipe is connected to a second connecting ball, the outer wall of the second connecting ball is connected to a first water outlet pipe, one end of the first water outlet pipe is connected to the inside of the second connecting ball, and the other end of the first water outlet pipe is connected to the inner box.

[0008] Further, the outer wall of the first connecting ball is connected to a second water inlet pipe, one end of the second water inlet pipe is connected to the interior of the first connecting ball; the outer wall of the first connecting ball is connected to a second water outlet pipe, one end of the second water outlet pipe is connected to the interior of the first connecting ball, and the other end of the second water outlet pipe is connected to the inner box;

[0009] The first water inlet pipe, the second water inlet pipe, the first water outlet pipe and the second water outlet pipe are all equipped with control valves, and the total flow of the first water inlet pipe and the second water inlet pipe matches the total flow of the first water outlet pipe and the second water outlet pipe.

[0010] Furthermore, a sealing cover is connected to the edge of the top of the inner box, and a cover plate with air holes is connected to the top of the inner box. The sealing cover and the cover plate form a cavity above the inner box so that the exhaust gas enters the cavity through the air holes. The top of the sealing cover is connected to an exhaust pipe, and one end of the exhaust pipe is connected to the inside of the cavity.

[0011] A second cold water pipe is arranged in the cavity, one end of the second cold water pipe extends downward through the bottom of the sealing cover, and this end of the second cold water pipe is connected to the second cold water pipe, and the other end of the second cold water pipe passes through the top of the sealing cover, so that the exhaust gas in the cavity heats the second cold water pipe, thereby recovering heat in the exhaust gas.

[0012] Furthermore, the middle portion of the second cold water pipe located inside the cavity is a spiral disc structure, which is used to increase the retention time of cold water in the cavity.

[0013] Furthermore, the distance between the disc-shaped structure portion of the second cold water pipe and the bottom of the cavity is smaller than the distance between the disc-shaped structure portion of the second cold water pipe and the top of the cavity, and the disc-shaped structure portion of the second cold water pipe is higher than the cover plate, so that the exhaust gas in the cavity is wrapped around the outside of the second cold water pipe, thereby increasing the contact area between the exhaust gas and the second cold water pipe.

[0014] Furthermore, the outer wall of the inner box is connected to a heat-insulating cover, the top of the heat-insulating cover is connected to a sealing cover, the heat-insulating cover, the sealing cover and the outer wall of the inner box together form a sealed cavity, the heat-conducting pipe, the first cold water pipe, the first connecting ball and the second connecting ball are all located in the sealed cavity, and one end of the second water inlet pipe and one end of the first cold water pipe both pass through the heat-insulating cover.

[0015] Compared with the prior art, the methylal heat energy recovery and utilization device has the following beneficial effects:

[0016] 1. The utility model winds a heat-conducting pipe around the outside of a first cold water pipe, and then drives the waste water in the middle area of ​​the inner box far from the first cold water pipe to move into the heat-conducting pipe through a driving component. The heat-conducting pipe is wound around the first cold water pipe to increase the contact area with the first cold water pipe, and at the same time, the distance between the waste water in methylal production and the first cold water pipe is reduced, so as to reduce the distance between heat conduction and improve the efficiency of conduction, thereby solving the problem that the distance between the middle area of ​​the box body of the methylal heat energy recovery and utilization device and the cold water pipe is far, which is not conducive to the conduction of heat and affects the heat recovery and utilization effect.

[0017] 2. The utility model provides a heat preservation cover on the outside of the inner box to form a heat preservation layer on the outside of the inner box, and wraps the first cold water pipe and the heat conducting pipe, thereby effectively reducing the heat loss released by the heat conducting pipe and the inner box, so that the released heat is better conducted to the first cold water pipe, thereby improving the recovery effect of the methylal heat energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a cross-sectional view of the heat preservation cover in the utility model;

[0020] Figure 3 It is a cross-sectional view of the inner box in the utility model;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the heat conducting pipe in the utility model;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the second cold water pipe in the utility model.

[0023] In the figure: 1, inner box; 2, first cold water pipe; 3, first connecting ball; 4, heat transfer pipe; 5, second connecting ball; 6, first water outlet pipe; 7, second water outlet pipe; 8, first water inlet pipe; 9, second water inlet pipe; 10, second cold water pipe; 11, sealing cover; 12, heat preservation cover; 13, drive assembly; 14, exhaust pipe; 15, cover. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-5 As shown, the utility model provides a technical solution: a methylal heat energy recovery and utilization device, comprising an inner box 1, a first cold water pipe 2 is wound around the outer wall of the inner box 1, the heat released by the inner box 1 is used to heat the water in the first cold water pipe 2, and a circulation mechanism is installed on the outer wall of the inner box 1 to move the waste water in the middle area of ​​the inner box 1 to the outside of the first cold water pipe 2, so as to shorten the distance between the waste water in the middle area of ​​the inner box 1 and the first cold water pipe 2.

[0026] The circulation mechanism includes a driving component 13 for pumping water, the input end of the driving component 13 is connected to the middle part of the bottom of the inner box 1, the output end of the driving component 13 is connected to the first water inlet pipe 8, the top end of the first water inlet pipe 8 is connected to the first connecting ball 3, the outer wall of the first connecting ball 3 is connected to the heat conducting pipe 4, one end of the heat conducting pipe 4 is connected to the inside of the first connecting ball 3, the heat conducting pipe 4 is spirally wound along the first cold water pipe 2 on the outside of the first cold water pipe 2, the other end of the heat conducting pipe 4 is connected to the second connecting ball 5, the outer wall of the second connecting ball 5 is connected to the first water outlet pipe 6, one end of the first water outlet pipe 6 is connected to the inside of the second connecting ball 5, and the other end of the first water outlet pipe 6 is connected to the inner box 1, so that the wastewater in the middle area of ​​the inner box 1 moves into the heat conducting pipe 4, which is used to shorten the distance between the wastewater in the middle area of ​​the inner box 1 and the first cold water pipe 2.

[0027] When in use, the wastewater generated in the production of acetal is introduced into the inner box 1, accompanied by a large amount of heat energy, and then the wastewater in the middle of the inner box 1 is extracted through the driving component 13, so that the water in the middle area of ​​the inner box 1 flows to the vicinity of the first cold water pipe 2, and is conducted to the first cold water pipe 2 through the heat pipe 4, so as to reduce the relative thickness between the wastewater in the middle area of ​​the inner box 1 and the first cold water pipe 2. At the same time, the heat pipe 4 is spirally wound on the first cold water pipe 2 to increase the contact surface between the heat pipe 4 and the first cold water pipe 2 to facilitate heat conduction; the driving component 13 can adopt an industrial centrifugal pump.

[0028] The outer wall of the first connecting ball 3 is connected to a second water inlet pipe 9, one end of which is connected to the interior of the first connecting ball 3; the outer wall of the first connecting ball 3 is connected to a second water outlet pipe 7, one end of which is connected to the interior of the first connecting ball 3, and the other end of which is connected to the inner box 1;

[0029] Control valves are installed on the first water inlet pipe 8, the second water inlet pipe 9, the first water outlet pipe 6 and the second water outlet pipe 7. The total flow rate of the first water inlet pipe 8 and the second water inlet pipe 9 matches the total flow rate of the first water outlet pipe 6 and the second water outlet pipe 7. When in use, when wastewater is continuously input from the outside, the external wastewater enters the first connecting ball 3, and at the same time, the wastewater in the middle area of ​​the inner box 1 is driven to flow back to the first connecting ball 3 through the driving component 13, and then the wastewater in the first connecting ball 3 flows into the inner box 1 through the second water outlet pipe 7 and the heat conducting pipe 4 respectively, so as to heat the first cold water pipe 2 through the heat conducting pipe 4. When wastewater is not input from the outside, the control valve on the second water inlet pipe 9 is closed, and then the control valve on the first water inlet pipe 8 is adjusted to increase the flow rate of the first water inlet pipe 8, and the water in the middle area of ​​the inner box 1 is continuously returned to the heat conducting pipe 4 through the driving component 13, so as to recover the heat in the wastewater in the middle area.

[0030] A sealing cover 11 is connected to the edge of the top of the inner box 1, and a cover plate 15 with air holes is connected to the top of the inner box 1. The sealing cover 11 and the cover plate 15 form a cavity above the inner box 1 so that the exhaust gas can enter the cavity through the air holes. An exhaust pipe 14 is connected to the top of the sealing cover 11, and one end of the exhaust pipe 14 is connected to the inside of the cavity; a second cold water pipe 10 is arranged in the cavity, and one end of the second cold water pipe 10 extends downward through the bottom of the sealing cover 11, and this end of the second cold water pipe 10 is connected to the second cold water pipe 10, and the other end of the second cold water pipe 10 passes through the top of the sealing cover 11, so that the exhaust gas heats the second cold water pipe 10 in the cavity, thereby recovering heat from the exhaust gas.

[0031] When in use, the exhaust gas in the inner box 1 enters the cavity through the air holes. Since the air holes are located inside the second cold water pipe 10, the exhaust gas containing heat heats the second cold water pipe 10, and the heat in the exhaust gas is conducted to the second cold water pipe 10, thereby recovering the heat in the exhaust gas.

[0032] The middle part of the second cold water pipe 10 located inside the cavity is a spiral disc structure, which is used to increase the residence time of cold water in the cavity; the distance between the disc structure part of the second cold water pipe 10 and the bottom of the cavity is smaller than the distance between the disc structure part of the second cold water pipe 10 and the top of the cavity, and the disc structure part of the second cold water pipe 10 is higher than the cover plate 15, so that the exhaust gas in the cavity is wrapped around the outside of the second cold water pipe 10, increasing the contact area between the exhaust gas and the second cold water pipe 10; the residence time of cold water is increased by the disc structure, and the contact area with the exhaust gas is increased by the suspended second cold water pipe 10, thereby improving the efficiency of heat conduction.

[0033] The outer wall of the inner box 1 is connected to an insulation cover 12, and the top of the insulation cover 12 is connected to the sealing cover 11. The insulation cover 12, the sealing cover 11 and the outer wall of the inner box 1 jointly form a sealed cavity, the heat pipe 4, the first cold water pipe 2, the first connecting ball 3 and the second connecting ball 5 are all located in the sealed cavity, one end of the second water inlet pipe 9 and one end of the first cold water pipe 2 both pass through the insulation cover 12; support legs and a drain pipe are provided at the bottom of the inner box 1 to facilitate the discharge of waste water in the inner box 1 through the drain pipe; the sealing cover 11 is made of insulating material, and its outside can be further provided with rock wool, glass wool, etc., and the insulation cover 12 can be used to form a sealed cavity outside the inner box 1 for the heat pipe 4 to heat the first cold water pipe 2, and at the same time, the sealing cover 11 and the insulation cover 12 are used for insulation to reduce heat loss.

[0034] The bottom waste water in the middle area of ​​the inner box 1 is extracted through the input end of the driving component 13, and the heat in the waste water enters the driving component 13 along with the flow of the waste water, and enters the first connecting ball 3 at the output end, and then the waste water enters the heat pipe 4, and the heat in the waste water is transferred to the heat pipe 4, and then transferred to the first cold water pipe 2 through the contact between the heat pipe 4 and the first cold water pipe 2, and then the water inside the first cold water pipe 2 is heated, and the heat energy in the waste water in the methylal production is recovered and reused, and at the same time, the exhaust gas in the inner box 1 moves upward through the pores, enters the cavity, and contacts the second cold water pipe 10 in the cavity, and the cold water in the second cold water pipe 10 is heated to transfer the heat in the exhaust gas to the cold water, which is used to recover the heat energy in the exhaust gas.

Claims

1. A methylal heat energy recovery and utilization device, comprising an inner box (1), wherein a first cold water pipe (2) is wound around the outer wall of the inner box (1), and the heat released by the inner box (1) is used to heat water in the first cold water pipe (2), characterized in that: The outer wall of the inner box (1) is provided with a circulation mechanism to move wastewater in the middle area of ​​the inner box (1) to the outside of the first cold water pipe (2), thereby shortening the distance between the wastewater in the middle area of ​​the inner box (1) and the first cold water pipe (2); The circulation mechanism comprises a driving component (13) for pumping water, the input end of the driving component (13) is connected to the middle of the bottom of the inner box (1), the output end of the driving component (13) is connected to a first water inlet pipe (8), the top end of the first water inlet pipe (8) is connected to a first connecting ball (3), the outer wall of the first connecting ball (3) is connected to a heat conducting pipe (4), one end of the heat conducting pipe (4) is connected to the inside of the first connecting ball (3), the heat conducting pipe (4) is spirally wound along the first cold water pipe (2) on the outside of the first cold water pipe (2), the other end of the heat conducting pipe (4) is connected to a second connecting ball (5), the outer wall of the second connecting ball (5) is connected to a first water outlet pipe (6), one end of the first water outlet pipe (6) is connected to the inside of the second connecting ball (5), and the other end of the first water outlet pipe (6) is connected to the inner box (1).

2. The methylal heat energy recovery and utilization device according to claim 1, characterized in that: The outer wall of the first connecting ball (3) is connected to a second water inlet pipe (9), one end of which is in communication with the interior of the first connecting ball (3); the outer wall of the first connecting ball (3) is connected to a second water outlet pipe (7), one end of which is in communication with the interior of the first connecting ball (3), and the other end of which is in communication with the inner box (1); Control valves are installed on the first water inlet pipe (8), the second water inlet pipe (9), the first water outlet pipe (6) and the second water outlet pipe (7), and the total flow rate of the first water inlet pipe (8) and the second water inlet pipe (9) matches the total flow rate of the first water outlet pipe (6) and the second water outlet pipe (7).

3. The methylal heat energy recovery and utilization device according to claim 2, characterized in that: A sealing cover (11) is connected to the edge of the top of the inner box (1), and a cover plate (15) with air holes is connected to the top of the inner box (1). The sealing cover (11) and the cover plate (15) form a cavity above the inner box (1) so that exhaust gas can enter the cavity through the air holes. An exhaust pipe (14) is connected to the top of the sealing cover (11), and one end of the exhaust pipe (14) is in communication with the interior of the cavity. A second cold water pipe (10) is arranged in the cavity, one end of the second cold water pipe (10) extends downward and passes through the bottom of the sealing cover (11), and this end of the second cold water pipe (10) is connected to the second cold water pipe (10), and the other end of the second cold water pipe (10) passes through the top of the sealing cover (11), so that the exhaust gas in the cavity heats the second cold water pipe (10), thereby playing a role in recovering heat in the exhaust gas.

4. The methylal heat energy recovery and utilization device according to claim 3 is characterized in that: The middle portion of the second cold water pipe (10) located inside the cavity is a spiral disc structure, which is used to increase the retention time of cold water in the cavity.

5. The methylal heat energy recovery and utilization device according to claim 4, characterized in that: The distance between the disc-shaped structure portion of the second cold water pipe (10) and the bottom of the cavity is smaller than the distance between the disc-shaped structure portion of the second cold water pipe (10) and the top of the cavity, and the disc-shaped structure portion of the second cold water pipe (10) is higher than the cover plate (15), so that the exhaust gas in the cavity is wrapped around the outside of the second cold water pipe (10), thereby increasing the contact area between the exhaust gas and the second cold water pipe (10).

6. The methylal heat energy recovery and utilization device according to claim 3, characterized in that: The outer wall of the inner box (1) is connected to a heat-insulating cover (12), the top of the heat-insulating cover (12) is connected to a sealing cover (11), the heat-insulating cover (12), the sealing cover (11) and the outer wall of the inner box (1) together form a sealed cavity, the heat-conducting pipe (4), the first cold water pipe (2), the first connecting ball (3) and the second connecting ball (5) are all located in the sealed cavity, and one end of the second water inlet pipe (9) and one end of the first cold water pipe (2) both pass through the heat-insulating cover (12).

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