Hot wastewater heat energy recoverer used in acetic anhydride reaction process

Abstract

The utility model discloses a hot wastewater heat energy recoverer used in an acetic anhydride reaction process, which relates to the technical field of heat energy recovery and comprises an outer shell, a heat energy recovery unit and a wastewater filtering unit, the recovery chamber is fixedly connected to the right side of the lower end of the shell; the heat energy recovery unit comprises a copper block, a spiral copper pipe, a heat conduction block, a hydraulic cylinder, an attaching piece and a connecting block. The device is provided with a reliable heat energy recovery unit, heat in reaction wastewater can be recovered as much as possible through multiple heat energy recovery modes, the recovered heat energy is supplemented to the heating process of acetic anhydride reaction, consumption of additional energy is reduced, the recovered heat energy can be subjected to multi-stage distribution, and the energy consumption is reduced. The heating temperature is controlled by controlling the amount of transferred heat, the device is further provided with a reliable waste water filtering unit, impurities contained in the device can be filtered firstly when hot waste water is introduced, precise parts of the device are prevented from being damaged, and a filter element is convenient to disassemble and clean.

Description

Technical Field

[0001] The utility model relates to the technical field of heat energy recovery, in particular to a hot waste water heat energy recovery device used in an acetic anhydride reaction process. Background Art

[0002] Acetic anhydride and hydrogen peroxide can react to generate peracetic acid and water. Peracetic acid is a strong oxidant widely used in disinfection, bleaching and organic synthesis. In this reaction process, a lot of heat will be generated. By recovering the heat in the reaction wastewater, the effect of energy saving can be achieved.

[0003] The heat energy recovery device used for hot wastewater from acetic anhydride reaction in the prior art has a single method for recovering heat energy from the wastewater, is unable to fully recover the heat energy in the wastewater, and lacks effective distribution and utilization of the recovered heat energy. In addition, since the hot wastewater used for recovery often contains some debris, it will cause damage to the internal device if it is not removed. Therefore, we propose a heat energy recovery device for hot wastewater in the acetic anhydride reaction process. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a heat energy recovery device for hot wastewater in the process of acetic anhydride reaction. The device has a reliable heat energy recovery unit and can recover as much heat as possible in the reaction wastewater through a variety of heat energy recovery methods, and supplement the recovered heat energy to the heating process of the acetic anhydride reaction, thereby reducing the consumption of external energy. The recovered heat energy can be distributed in multiple stages, and the heating temperature can be controlled by controlling the amount of heat transferred. The utility model also has a reliable wastewater filtering unit, which can first filter the sundries contained in the hot wastewater when the hot wastewater is introduced to avoid damaging the precision parts of the device. The filter element is easy to disassemble, and it is easy to clean the filter element and the collected sundries at the same time, thereby effectively solving the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat energy recovery device for hot wastewater in the acetic anhydride reaction process, comprising an outer shell, a recovery chamber, a heat energy recovery unit and a wastewater filtration unit;

[0006] Outer shell: It is a square structure, and the recovery chamber is fixedly connected to the right side of the lower end of the outer shell;

[0007] Heat recovery unit: comprising a copper block, a spiral copper tube, a heat-conducting block, a hydraulic cylinder, a heat-conducting slide bar, a fitting sheet and a connecting block. A cylindrical copper block is embedded and installed inside the outer shell. The spiral copper tube passes through the inside of the copper block, and the tube wall is tightly fitted with the copper block. A trapezoidal heat-conducting block is embedded and installed on the right side of the outer shell. The wide side of the heat-conducting block is fixedly connected to the inner wall of the copper block, and the narrow side of the heat-conducting block extends to the right. Three heat-conducting slide bars are slidably connected to the right side of the heat-conducting block. A hydraulic cylinder is installed on the lower side of each heat-conducting slide bar. The cylinder body of the hydraulic cylinder is embedded in the inside of the heat-conducting block. The telescopic rod of the hydraulic cylinder extends to the right and is fixedly connected to the upper heat-conducting slide bar through the connecting block. The right end of the heat-conducting slide bar is fixedly connected to an arc-shaped fitting sheet.

[0008] Wastewater filtration unit: installed on the upper side of the outer shell.

[0009] The hot wastewater filtered by the wastewater filtration unit flows downward into the spiral copper tube. The spiral structure of the copper tube can provide enough time and area for heat conduction during the flow of hot wastewater. The copper block absorbs the heat of the spiral copper tube, and the heat-conducting block and the heat-conducting slide rod continue to conduct heat. The hydraulic cylinder drives the heat-conducting slide rod to slide outward through the connecting block, thereby bonding the bonding sheet to the outside of the reaction vessel, thereby realizing the recovery of wastewater heat energy. The three heat-conducting slide rods can slide out independently, and by controlling the number of bonding sheets bonded to the culture vessel, the recovered heat can be distributed in multiple stages, which is convenient for the effective use of the recovered heat.

[0010] Furthermore, the heat recovery unit also includes an air inlet pipe and an air outlet pipe, the upper and lower ends of the spiral copper tube both extend outward, the lower end of the spiral copper tube passes into the interior of the recovery chamber from the left side, the front end of the recovery chamber is fixedly connected to an air inlet pipe at a lower position, and the rear end of the recovery chamber is fixedly connected to an air outlet pipe at an upper position. The wastewater flowing through the spiral copper tube still contains a small amount of heat, and the remaining heat of the wastewater is further recovered in the recovery chamber. The air inlet pipe allows external air to enter the wastewater in the recovery chamber from the bottom, and through contact with the wastewater, the gas itself is heated up, and then the gas rises and is discharged outward through the air outlet pipe on the upper back side of the recovery chamber. By connecting the gas pipeline at the air outlet pipe, the hot gas that passes out can be recycled, thereby achieving the most efficient recovery of the heat energy in the hot wastewater.

[0011] Furthermore, the heat recovery unit further comprises a one-way air valve and an air pump, wherein the connection between the air inlet pipe and the air outlet pipe and the recovery chamber is provided with a one-way air valve, and the air pump is arranged in series in the air inlet pipe. The one-way air valve is used to prevent the backflow of gas and waste water, and the air pump realizes the power of conveying air in the recovery chamber by increasing the air pressure.

[0012] Furthermore, the wastewater filtration unit comprises a screw-on block, a funnel, a filter element and a rubber ring. The upper end of the spiral copper tube is fixedly connected with a funnel, the funnel is arranged horizontally, and six arc-shaped screw-on blocks are fixedly connected at the port on the inner bottom side. The six screw-on blocks are arranged in a circumferential array and have threads on the outside. The outside of the filter element is wrapped with a filter screen and is threadedly connected to the screw-on block through the internal threads at the lower end. A circle of rubber rings is fixedly connected to the lower side of the filter element, the outer side of the rubber ring tilts upward, and the rubber ring fits the inner wall of the funnel. The screw-on block is used for tightening the filter element, and the gap between the screw-on blocks allows the hot wastewater contained in the funnel to pass through the filter element and flow into the spiral copper tube. When the filter element is tightened, the rubber ring fits on the inner wall of the funnel, and the debris filtered by the filter element is retained in the grooves of the rubber ring. When the filter element is screwed down, the debris collected on the filter element and the rubber ring can be effectively cleaned.

[0013] Furthermore, it also includes a drain pipe and a timing opening and closing valve. A drain pipe is fixedly connected to the right side of the recovery chamber near the lower corner, and a timing opening and closing valve is installed at the connection between the drain pipe and the recovery chamber. The drain pipe is used to discharge the wastewater after the secondary heat energy recovery. The timing opening and closing valve can realize the intermittent opening and closing of the drain pipe, so that the ineffective wastewater can be discharged after the secondary recovery.

[0014] Furthermore, it also includes a temperature monitor, the front end of the outer shell is equipped with a temperature monitor, and at least three detection heads are installed along the mounting rod on the lower side of the temperature monitor, the detection heads extend into the inner part of the outer shell and fit with the outer wall of the copper block, and a display screen is provided on the outer side of the temperature monitor. As the hot wastewater flows downward through the spiral copper tube, its own heat will gradually decrease. The temperature monitor is used to detect the temperature of different positions of the copper block, and the temperature of different positions of the copper block can be displayed through the display screen at the front end, which is convenient for the management and utilization of the recovered heat energy.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the hot wastewater heat energy recovery device used in the acetic anhydride reaction process has the following advantages:

[0016] 1. It has a reliable heat recovery unit. Through various heat recovery methods, it can recover as much heat as possible from the reaction wastewater, and add the recovered heat energy to the heating process of the acetic anhydride reaction, reducing the consumption of external energy. It can also distribute the recovered heat energy in multiple levels, and control the heating temperature by controlling the amount of heat transferred;

[0017] 2. It has a reliable wastewater filtration unit, which can filter the internal debris before hot wastewater is introduced to avoid damage to the precision parts of the device. The filter element is easy to disassemble and the filter element and the collected debris can be cleaned at the same time;

[0018] 3. The utility model has a reliable heat recovery unit. Through a variety of heat recovery methods, it can recover as much heat as possible in the reaction wastewater, and add the recovered heat to the heating process of the acetic anhydride reaction, reducing the consumption of external energy. It can also distribute the recovered heat in multiple stages, and control the heating temperature by controlling the amount of heat transferred. It also has a reliable wastewater filtration unit, which can filter the debris contained inside when the hot wastewater is introduced to avoid damage to the precision parts of the device. The filter element is easy to disassemble, and it is easy to clean the filter element and the collected debris at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the right side structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the wastewater filtration unit in the utility model.

[0022] In the figure: 1 outer shell, 2 recovery chamber, 3 heat recovery unit, 31 copper block, 32 spiral copper tube, 33 heat conductive block, 34 hydraulic cylinder, 35 heat conductive slide bar, 36 bonding sheet, 37 air inlet pipe, 38 one-way air valve, 39 air outlet pipe, 310 air pump, 311 connecting block, 4 wastewater filtration unit, 41 rotary block, 42 ​​funnel, 43 filter element, 44 rubber ring, 5 drain pipe, 6 timing opening and closing valve, 7 temperature monitor. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-Figure 3 , this embodiment provides a technical solution: a heat energy recovery device for hot wastewater in an acetic anhydride reaction process, comprising an outer shell 1, a recovery chamber 2, a heat energy recovery unit 3 and a wastewater filtration unit 4;

[0025] The outer shell 1 is a square structure, and the recovery chamber 2 is fixedly connected to the right side of the lower end of the outer shell 1;

[0026] Heat recovery unit 3: comprises copper block 31, spiral copper tube 32, heat conducting block 33, hydraulic cylinder 34, heat conducting slide bar 35, fitting sheet 36 and connecting block 311. A cylindrical copper block 31 is embedded and installed inside the outer shell 1. The spiral copper tube 32 passes through the inside of the copper block 31, and the tube wall is tightly fitted with the copper block 31. A trapezoidal heat conducting block 33 is embedded and installed on the right side of the outer shell 1. The wide side of the heat conducting block 33 is fixedly connected to the inner wall of the copper block 31, and the narrow side of the heat conducting block 33 extends to the right. Three heat conducting slide bars 35 are slidably connected to the right side of the heat conducting block 33. A hydraulic cylinder 34 is installed on the lower side of each heat conducting slide bar 35. The cylinder body of the hydraulic cylinder 34 is embedded in the inside of the heat conducting block 33. The telescopic rod of the hydraulic cylinder 34 extends to the right and is fixedly connected to the heat conducting slide bar 35 on the upper side through the connecting block 311. The right end of the heat conducting slide bar 35 is fixedly connected with an arc-shaped fitting sheet 36.

[0027] Wastewater filtering unit 4: installed on the upper side of the outer shell 1.

[0028] The hot wastewater filtered by the wastewater filtration unit 4 flows downward into the spiral copper tube 32. The spiral structure of the copper tube can provide enough time and area for heat conduction during the flow of hot wastewater. The copper block 31 absorbs the heat of the spiral copper tube 32, and the heat-conducting block 33 and the heat-conducting slide bar 35 continue to conduct heat. The hydraulic cylinder 34 drives the heat-conducting slide bar 35 to slide outward through the connecting block 311, thereby bonding the bonding sheet 36 to the outside of the reaction vessel, thereby realizing the recovery of wastewater heat energy. The three heat-conducting slide bars 35 can slide out independently, and by controlling the number of bonding sheets 36 bonded to the culture vessel, the recovered heat can be distributed in multiple stages, which is convenient for effective use of the recovered heat.

[0029] The heat recovery unit 3 also includes an air inlet pipe 37 and an air outlet pipe 39. The upper and lower ends of the spiral copper tube 32 are both extended outward. The lower end of the spiral copper tube 32 is passed into the interior of the recovery chamber 2 from the left side. The front end of the recovery chamber 2 is fixedly connected with the air inlet pipe 37 at the lower position, and the rear end of the recovery chamber 2 is fixedly connected with the air outlet pipe 39 at the upper position. The wastewater flowing through the spiral copper tube 32 still contains a small amount of heat. The remaining heat of the wastewater is further recovered in the recovery chamber 2. The air inlet pipe 37 allows external air to enter the wastewater in the recovery chamber 2 from the bottom. By contacting with the wastewater, the gas itself is heated. Then the gas rises and is discharged outward through the air outlet pipe 39 on the upper rear side of the recovery chamber 2. By connecting the gas pipeline at the air outlet pipe 39, the hot gas that passes out can be recycled, thereby achieving the maximum efficiency of heat recovery in the hot wastewater.

[0030] The heat recovery unit 3 further includes a one-way air valve 38 and an air pump 310. The one-way air valve 38 is installed at the connection between the air inlet pipe 37 and the air outlet pipe 39 and the recovery chamber 2. The air pump 310 is arranged in series in the air inlet pipe 37. The one-way air valve 38 is used to prevent the backflow of gas and wastewater. The air pump 310 realizes the power of transporting air in the recovery chamber 2 by increasing the air pressure.

[0031] The wastewater filtration unit 4 includes a screw-on block 41, a funnel 42, a filter element 43 and a rubber ring 44. The upper end of the spiral copper tube 32 is fixedly connected to the funnel 42. The funnel 42 is arranged horizontally, and six arc-shaped screw-on blocks 41 are fixedly connected to the port on the inner bottom side. The six screw-on blocks 41 are distributed in a circular array and have threads on the outside. The outside of the filter element 43 is wrapped with a filter screen, and is threadedly connected to the screw-on block 41 through the internal threads at the lower end. A circle of rubber ring 44 is fixedly connected to the lower side of the filter element 43. The outer side of the rubber ring 44 is tilted upward, and the rubber ring 44 fits the inner wall of the funnel 42. The screw-in block 41 is used for tightening and installing the filter element 43. At the same time, the gap between the screw-in blocks 41 allows the hot waste water contained in the funnel 42 to pass through the filter element 43 and flow into the spiral copper tube 32. When the filter element 43 is tightened, the rubber ring 44 fits on the inner wall of the funnel 42, and the debris filtered by the filter element 43 is retained in the groove of the rubber ring 44. When the filter element 43 is unscrewed, the debris collected on the filter element 43 and the rubber ring 44 can be effectively cleaned.

[0032] It also includes a drain pipe 5 and a timing opening and closing valve 6. A drain pipe 5 is fixedly connected to the right side of the recovery chamber 2 near the lower corner, and a timing opening and closing valve 6 is installed at the connection between the drain pipe 5 and the recovery chamber 2. The drain pipe 5 is used to discharge the wastewater after the secondary heat energy recovery. The timing opening and closing valve 6 can realize the intermittent opening and closing of the drain pipe 5, so that the invalid wastewater can be discharged after the secondary recovery.

[0033] It also includes a temperature monitor 7, which is installed at the front end of the outer shell 1. At least three detection heads are installed along the mounting rod on the lower side of the temperature monitor 7. The detection heads extend into the inner part of the outer shell 1 and fit the outer wall of the copper block 31. A display screen is provided on the outer side of the temperature monitor 7. When the hot wastewater flows downward through the spiral copper tube 32, its own heat will gradually decrease. The temperature monitor 7 is used to detect the temperature of different positions of the copper block 31. The temperature of different positions of the copper block 31 can be displayed through the display screen at the front end, which is convenient for managing and utilizing the recovered heat energy.

[0034] The utility model provides a heat energy recovery device for hot wastewater in an acetic anhydride reaction process, and the working principle is as follows: it has a reliable wastewater filtering unit 4, which can first filter the impurities contained inside when hot wastewater is introduced to avoid damaging the precision parts of the device, and the filter element 43 is easy to disassemble, and it is easy to clean the filter element 43 and the collected impurities at the same time: the screw-in block 41 is used for tightening and installing the filter element 43, and at the same time, the gap between the screw-in blocks 41 enables the hot wastewater contained in the funnel 42 to pass through the filter element 43 and flow into the spiral copper tube 32. When the filter element 43 is tightened, the rubber ring 44 is attached to the inner wall of the funnel 42, and the impurities filtered by the filter element 43 are retained in the grooves of the rubber ring 44. When the filter element 43 is screwed down, the impurities collected on the filter element 43 and the rubber ring 44 can be effectively cleaned. And it has a reliable heat recovery unit 3, through a variety of heat recovery methods, it can recover as much heat as possible in the reaction wastewater, and add the recovered heat to the heating process of the acetic anhydride reaction, reducing the consumption of external energy, and can distribute the recovered heat in multiple stages, and control the heating temperature by controlling the amount of heat transferred: the hot wastewater filtered by the wastewater filtration unit 4 flows downward into the spiral copper tube 32, and the spiral structure of the copper tube can have enough time and area for heat conduction during the flow of hot wastewater. The copper block 31 absorbs the heat of the spiral copper tube 32, and the heat-conducting block 33 and the heat-conducting slide rod 35 continue to conduct heat. The hydraulic cylinder 34 drives the heat-conducting slide rod 35 to slide outward through the connecting block 311, so that the bonding sheet 36 is bonded to the outside of the reaction vessel, thereby realizing the recovery of wastewater heat energy. The rod 35 can slide out independently, and by controlling the number of bonding pieces 36 bonded to the culture vessel, the recovered heat can be distributed in multiple stages, which is convenient for effective use of the recovered heat; the wastewater flowing through the spiral copper tube 32 still contains a small amount of heat, and the remaining heat of the wastewater is further recovered in the recovery chamber 2. The air inlet pipe 37 allows external air to enter the wastewater in the recovery chamber 2 from the bottom, and the gas itself is heated by contact with the wastewater. The gas then rises and is discharged to the outside through the air outlet pipe 39 on the upper rear side of the recovery chamber 2. By connecting the gas transmission pipeline at the air outlet pipe 39, the hot gas that passes out can be recycled, thereby achieving the most efficient recovery of the heat energy in the hot wastewater; the one-way air valve 38 is used to prevent the backflow of gas and wastewater, and the air pump 310 realizes the air transportation power in the recovery chamber 2 by increasing the air pressure. In addition, as the hot wastewater flows downward through the spiral copper tube 32, its own heat will gradually decrease. The temperature monitor 7 is used to detect the temperature of different positions of the copper block 31. The temperature of different positions of the copper block 31 can be displayed through the front display screen, which is convenient for the management and utilization of the recovered heat energy.

[0035] It is worth noting that the input ends of the hydraulic cylinder 34 and the timing opening and closing valve 6 disclosed in the above embodiments are electrically connected to the output end of the external power supply through an external control switch group, and the control switch group controls the operation of the hydraulic cylinder 34 and the timing opening and closing valve 6 using methods commonly used in the prior art.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heat energy recovery device for hot wastewater in an acetic anhydride reaction process, characterized in that: It comprises an outer shell (1), a recovery chamber (2), a heat recovery unit (3) and a wastewater filtering unit (4); The outer shell (1) is a square structure, and the recovery chamber (2) is fixedly connected to the right side of the lower end of the outer shell (1); The heat recovery unit (3) comprises a copper block (31), a spiral copper tube (32), a heat conducting block (33), a hydraulic cylinder (34), a heat conducting slide rod (35), a bonding sheet (36) and a connecting block (311). The cylindrical copper block (31) is embedded and installed inside the outer shell (1). The spiral copper tube (32) passes through the inside of the copper block (31), and the tube wall is tightly fitted with the copper block (31). A trapezoidal heat conducting block (33) is embedded and installed on the right side of the outer shell (1). The wide side of the heat conducting block (33) is in contact with the copper block (31). 1), the narrow side of the heat-conducting block (33) extends to the right, and three heat-conducting slide bars (35) are slidably connected to the right side of the heat-conducting block (33), and a hydraulic cylinder (34) is installed on the lower side of each heat-conducting slide bar (35). The cylinder body of the hydraulic cylinder (34) is embedded in the heat-conducting block (33), and the telescopic rod of the hydraulic cylinder (34) extends to the right and is fixedly connected to the heat-conducting slide bar (35) on the upper side through the connecting block (311). The right end of the heat-conducting slide bar (35) is fixedly connected to an arc-shaped fitting sheet (36); Wastewater filtering unit (4): installed on the upper side of the outer shell (1).

2. A hot wastewater heat energy recovery device for use in an acetic anhydride reaction process according to claim 1, characterized in that: The heat energy recovery unit (3) further comprises an air inlet pipe (37) and an air outlet pipe (39); the upper and lower ends of the spiral copper tube (32) both extend outward; the lower end of the spiral copper tube (32) passes from the left side into the interior of the recovery chamber (2); the front end of the recovery chamber (2) is fixedly connected to the air inlet pipe (37) at a lower position, and the rear end of the recovery chamber (2) is fixedly connected to the air outlet pipe (39) at an upper position.

3. A hot wastewater heat energy recovery device for use in an acetic anhydride reaction process according to claim 2, characterized in that: The heat energy recovery unit (3) further comprises a one-way air valve (38) and an air pump (310); the one-way air valve (38) is installed at the connection between the air inlet pipe (37) and the air outlet pipe (39) and the recovery chamber (2); and the air pump (310) is arranged in series in the air inlet pipe (37).

4. The hot wastewater heat energy recovery device used in the acetic anhydride reaction process according to claim 1, characterized in that: The wastewater filtering unit (4) comprises a screw-on block (41), a funnel (42), a filter element (43) and a rubber ring (44); the upper end of the spiral copper tube (32) is fixedly connected to the funnel (42); the funnel (42) is arranged horizontally, and six arc-shaped screw-on blocks (41) are fixedly connected to the port on the inner bottom side; the six screw-on blocks (41) are arranged in a circular array and have threads on the outer side; the outer side of the filter element (43) is wrapped with a filter screen and is threadedly connected to the screw-on block (41) through the inner threads at the lower end; a circle of rubber ring (44) is fixedly connected to the lower side of the filter element (43); the outer side of the rubber ring (44) is tilted upward, and the rubber ring (44) fits the inner wall of the funnel (42).

5. The hot wastewater heat energy recovery device used in the acetic anhydride reaction process according to claim 1, characterized in that: It also includes a drain pipe (5) and a timed opening and closing valve (6); a drain pipe (5) is fixedly connected to the right side of the recovery chamber (2) near the lower corner, and a timed opening and closing valve (6) is installed at the connection between the drain pipe (5) and the recovery chamber (2).

6. The hot wastewater heat energy recovery device used in the acetic anhydride reaction process according to claim 1, characterized in that: It also includes a temperature monitor (7), the front end of the outer shell (1) is equipped with the temperature monitor (7), the lower side of the temperature monitor (7) is equipped with no less than three detection heads along the mounting rod, the detection heads extend into the interior of the outer shell (1) and fit with the outer wall of the copper block (31), and the outer side of the temperature monitor (7) is provided with a display screen.

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