Industrial wastewater waste heat wrapping type heat exchange material drying system

Abstract

The utility model discloses an industrial wastewater waste heat wrapping type heat exchange material drying system, and belongs to the technical field of energy conservation and environmental protection. The material drying device solves the problem that an existing material drying device is high in energy cost. One end of the jacket type shell and one end of the hollow sleeve shaft are connected to a water supply port of the first condenser through water supply pipes, and the other end of the jacket type shell and the other end of the hollow sleeve shaft are connected to a water return port of the first condenser through water return pipes. A flash steam outlet of the evaporator is communicated with a steam inlet of the first condenser, the first condenser is connected with a first vacuum pump, a flash steam exhaust outlet of the material drying device is communicated with a steam exhaust inlet of the second condenser, and waste heat circulating water enters the jacket type shell, the hollow sleeve shaft and the hollow disc and is discharged through a water return pipe. Compared with the prior art, the energy cost of operation is greatly reduced; in addition, the quality of the heat source can be flexibly determined by maintaining the drying vacuum degree.

Description

Technical Field

[0001] The utility model relates to a material drying system for industrial wastewater waste heat wrapping type heat exchange, belonging to the technical field of energy conservation and environmental protection. Background Art

[0002] Traditional material drying requires a relatively high heat source, mostly high-temperature steam, electricity and other energy sources. Although its high-temperature heat exchange drying rate is relatively high, its energy cost is very high, which makes the energy cost of material drying high at this stage, restricting the development of related industries. Taking steam drying as an example, to dry 1t / h of 80% moisture content material to 30% moisture content, at least 0.75t of high-temperature steam is required. Assuming that the steam price needs to be 250 yuan / t, the thermal cost of drying 1t / h of 80% moisture content material to 30% moisture content is about 187 yuan. Therefore, there is an urgent need for a material drying system that can effectively save energy costs. Utility Model Content

[0003] The utility model aims to solve the problem of high energy cost of existing material drying equipment, and further provides a material drying system with industrial wastewater waste heat wrapping type heat exchange.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A material drying system for industrial wastewater waste heat wrapped heat exchange comprises material drying equipment, an evaporator, a first condenser and a second condenser, wherein the material drying equipment comprises a jacketed shell, a hollow sleeve shaft rotatably installed in the jacketed shell and a plurality of hollow discs fixedly sleeved on the hollow sleeve shaft, a wet material inlet and a dry material outlet are respectively arranged on the jacketed shell, each hollow disc is connected to the hollow sleeve shaft, one end of the jacketed shell and one end of the hollow sleeve shaft are connected to the water supply port of the first condenser through a water supply pipe, the other end of the jacketed shell and the other end of the hollow sleeve shaft are connected to the water return port of the first condenser through a water return pipe, the flash steam outlet of the evaporator is connected to the steam inlet of the first condenser, the first condenser is connected to a first vacuum pump, the flash exhaust steam outlet of the material drying equipment is connected to the exhaust steam inlet of the second condenser, the second condenser is connected to a second vacuum pump, and the waste heat circulating water enters the jacketed shell, the hollow sleeve shaft and the hollow disc respectively, and is discharged through the water return pipe.

[0006] Furthermore, the jacketed shell includes an inner wall which is cylindrical and closed at both ends, and an outer wall which is sealed and arranged outside the inner wall, and a cavity is formed between the inner wall and the outer wall.

[0007] Furthermore, one end of the jacketed shell is connected to the water supply pipe through a water distribution pipe, and the other end of the jacketed shell is connected to the water return pipe through a water return pipe.

[0008] Furthermore, the hollow sleeve shaft includes an inner shaft and an outer shaft coaxially sleeved on the outside of the inner shaft, wherein the inner shaft is connected to the interior of a plurality of hollow discs through a plurality of water outlet pipes, and the outer shaft is connected to the interior of a plurality of hollow discs through a plurality of water inlet pipes, and one end of the outer shaft is closed, and the other end of the outer shaft is connected to the return pipe, and one end of the inner shaft is connected to the water supply pipe, and the other end of the inner shaft is closed.

[0009] Furthermore, one end of the inner shaft and the other end of the outer shaft are rotatably connected to the water supply pipe and the water return pipe through adapters respectively.

[0010] Furthermore, one end or the other end of the hollow sleeve shaft is driven to rotate through a motor and a gearbox.

[0011] Furthermore, a dust collector is connected to the flash exhaust steam outlet of the material drying equipment.

[0012] Furthermore, the wet material inlet and the dry material outlet are staggered.

[0013] Furthermore, a return water pump is provided on the return water pipe.

[0014] Furthermore, the second condenser is an integrated condenser, with a flash exhaust steam inlet at the top, a plurality of heat exchange risers arranged in the middle, and a condensate storage tank at the bottom.

[0015] Compared with the prior art, the utility model has the following effects:

[0016] The utility model utilizes the vacuum phase change principle to realize wrapped heat exchange by rotating the hollow disc and the jacketed shell, and utilizes the low-temperature waste heat to evaporate the water in the wet material for condensation, thereby realizing material reduction.

[0017] By adopting the material drying system of the utility model, hot water as low as 60° C. can be used as a heat source for drying materials, which greatly reduces the energy cost of operation compared with the prior art; in addition, the quality of the heat source can be flexibly determined by maintaining the vacuum degree of drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 An enlarged schematic diagram of point P;

[0020] Figure 3 This is a schematic diagram of the flow direction of waste heat circulating water in the hollow sleeve and hollow disc.

[0021] In the figure:

[0022] 1. Material drying equipment; 1-1. Jacketed shell; 1-11. Inner wall; 1-12. Outer wall; 1-2. Hollow sleeve shaft; 1-21. Inner shaft; 1-22. Outer shaft; 1-23. Water outlet pipe; 1-24. Water inlet pipe; 1-3. Hollow disc; 1-4. Wet material inlet; 1-5. Dry material outlet; 1-6. Water distribution pipe; 1-7. Water return pipe; 1-8. Dust collector; 2. Evaporator; 3. First condenser; 4. Second condenser; 5. Water supply pipe; 6. Water return pipe; 7. First vacuum pump; 8. Second vacuum pump; 9. Adapter; 10. Motor; 11. Gearbox; 12. Water return pump. DETAILED DESCRIPTION

[0023] Specific implementation method 1: Combination Figure 1 to Figure 3 This implementation mode is explained by clearly and completely describing the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] It should be noted that the descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", "bottom", etc. are all defined based on the relationship between the orientations or positions shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure described must be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] A material drying system for industrial wastewater waste heat wrapped heat exchange, comprising a material drying device 1, an evaporator 2, a first condenser 3 and a second condenser 4, wherein the material drying device 1 comprises a jacketed shell 1-1, a hollow sleeve shaft 1-2 rotatably mounted in the jacketed shell 1-1 and a plurality of hollow discs 1-3 fixedly mounted on the hollow sleeve shaft 1-2, the jacketed shell 1-1 is respectively provided with a wet material inlet 1-4 and a dry material outlet 1-5, each hollow disc 1-3 is connected to the hollow sleeve shaft 1-2, one end of the jacketed shell 1-1 and one end of the hollow sleeve shaft 1-2 are connected by a The water supply pipe 5 is connected to the water supply port of the first condenser 3, the other end of the jacketed shell 1-1 and the other end of the hollow sleeve shaft 1-2 are connected to the return port of the first condenser 3 through the return pipe 6, the flash steam outlet of the evaporator 2 is connected to the steam inlet of the first condenser 3, the first condenser 3 is connected to a first vacuum pump 7, the flash exhaust steam outlet of the material drying equipment 1 is connected to the exhaust steam inlet of the second condenser 4, the second condenser 4 is connected to a second vacuum pump 8, and the waste heat circulating water enters the jacketed shell 1-1, the hollow sleeve shaft 1-2 and the hollow disc 1-3 respectively, and is discharged through the return pipe 6.

[0027] The evaporator 2 is provided with a wastewater inlet at the top and a wastewater outlet at the bottom, and the first condenser 3 is provided with a condensed water outlet at the bottom.

[0028] The utility model utilizes the vacuum phase change principle to realize wrapped heat exchange by rotating the hollow disc 1-3 and the jacketed shell 1-1, and utilizes low-temperature waste heat to evaporate the water in the wet material for condensation, thereby realizing material reduction.

[0029] By adopting the material drying system of the utility model, hot water as low as 60° C. can be used as a heat source for drying materials, which greatly reduces the energy cost of operation compared with the prior art; in addition, the quality of the heat source can be flexibly determined by maintaining the vacuum degree of drying.

[0030] The specific workflow is as follows:

[0031] 1. Material system flow: wet material is added to the material drying equipment 1 through the wet material inlet 1-4. After entering the equipment, the wet material is continuously stirred and moved forward through the hollow disc 1-3. During the process, it absorbs the heat in the jacketed shell 1-1 and the hollow disc 1-3. The pressure in the cavity of the material drying equipment 1 is maintained at -0.096MPa.g. The boiling point of water is about 34-35℃. In the vacuum environment of the material drying equipment 1, after the material temperature exceeds this boiling point after absorbing heat, flash evaporation occurs and negative pressure steam is evaporated. After the wet material is evaporated, it becomes dry material and is discharged from the material drying equipment 1 through the dry material outlet 1-5.

[0032] 2. Waste heat extraction system: wastewater enters the evaporator 2, which is a negative pressure environment. The wastewater flashes and evaporates into crystallized negative pressure steam. The steam enters the first condenser 3, exchanges heat with the waste water system, condenses, transfers heat to the waste water, and condenses the water. The vacuum of the whole system is maintained by the first vacuum pump 7 connected to the first condenser 3;

[0033] 3. Waste heat water system: The waste heat circulating water at 60-80℃ generated by the waste heat extraction system enters the jacketed shell 1-1, hollow sleeve shaft 1-2 and hollow disc 1-3 of the material drying equipment 1, wherein the inner shaft 1-21 of the hollow sleeve shaft 1-2 is the heat source inlet, and the outer shaft 1-22 is the heat source return water. The hot water in the jacketed shell 1-1, hollow sleeve shaft 1-2 and hollow disc 1-3 is absorbed by the wet material and cooled, and then returns to the waste heat extraction system as heat source water return water, and this process is repeated;

[0034] 4. Material drying vacuum system: The second vacuum pump 8 evacuates air in the second condenser 4 to maintain negative pressure, wherein the flash exhaust steam passes through the heat exchange riser of the second condenser 4, and the exhaust steam is condensed after absorbing heat in the second condenser 4. The condensed water is discharged through the condensed water storage tank of the integrated condenser, and the exhaust gas is sucked by the second vacuum pump 8 for subsequent tail gas treatment.

[0035] The jacketed shell 1-1 includes an inner wall 1-11 which is cylindrical and closed at both ends, and an outer wall 1-12 which is sealed and wrapped outside the inner wall 1-11, and a cavity is formed between the inner wall 1-11 and the outer wall 1-12. With such a design, the water supply pipe 5 is connected to one end of the cavity, and the water return pipe 6 is connected to the other end of the cavity. The cavity formed between the inner wall 1-11 and the outer wall 1-12 facilitates the flow of waste heat circulating water in the jacketed shell 1-1, thereby better realizing wrapped heat exchange.

[0036] One end of the jacketed shell 1-1 is connected to the water supply pipe 5 through a water distribution pipe 1-6, and the other end of the jacketed shell 1-1 is connected to the return pipe 6 through a water withdrawal pipe 1-7. In this design, by setting the water distribution pipe 1-6, it is convenient for the waste heat circulating water to enter the cavity of the jacketed shell 1-1. By setting the water withdrawal pipe 1-7, it is convenient for the waste heat circulating water after heat exchange to be discharged to the return pipe 6. The number of water distribution pipes 1-6 can be one, preferably two, and they are respectively connected to the upper part and the lower part arranged at one end of the jacketed shell 1-1.

[0037] The hollow sleeve shaft 1-2 includes an inner shaft 1-21 and an outer shaft 1-22 coaxially sleeved on the outer side of the inner shaft 1-21, wherein the inner shaft 1-21 is connected to the inside of the plurality of hollow discs 1-3 through a plurality of water outlet pipes 1-23, and the outer shaft 1-22 is connected to the inside of the plurality of hollow discs 1-3 through a plurality of water inlet pipes 1-24, and one end of the outer shaft 1-22 is closed, and the other end of the outer shaft 1-22 is connected to the return pipe 6, and one end of the inner shaft 1-21 is connected to the water supply pipe 5, and the other end of the inner shaft 1-21 is closed. With such a design, the waste heat circulating water enters the inner shaft 1-21 through the water supply pipe 5, and then enters the plurality of hollow discs 1-3 through a plurality of water outlet pipes 1-23, respectively, so as to realize the waste heat circulating water in the hollow disc 1-3 and the wet material outside the hollow disc 1-3 for heat exchange. The waste heat circulating water after heat exchange in the hollow disc 1 - 3 enters the gap between the outer shaft 1 - 22 and the inner shaft 1 - 21 through the water inlet pipe 1 - 24 , and is then returned to the first condenser 3 through the return pipe 6 .

[0038] One end of the inner shaft 1-21 and the other end of the outer shaft 1-22 are rotatably connected to the water supply pipe 5 and the water return pipe 6 respectively through the adapter 9. With such a design, the two ends of the hollow sleeve shaft 1-2 are rotatably and sealedly connected to the water supply pipe 5 and the water return pipe 6 through the adapter 9, so that when the hollow sleeve shaft 1-2 and the hollow disc 1-3 mounted thereon rotate, the water supply pipe 5 and the water return pipe 6 will not be driven to rotate synchronously.

[0039] One end or the other end of the hollow sleeve shaft 1-2 is driven to rotate by the motor 10 and the gearbox 11. With such a design, the gearbox 11 plays a role in steering and speed change of the output shaft of the motor 10. The gearbox 11 can be a conventional gearbox 11 structure, and the gear assembly is used to achieve speed change inside, wherein the driving gear is fixedly connected to the output shaft of the motor 10, and a driven gear is sleeved on the hollow sleeve shaft 1-2 to achieve steering.

[0040] The flash exhaust steam outlet of the material drying device 1 is connected with a dust collector 1-8. In this design, the dust collector 1-8 is connected to the inside of the material drying device 1 as a vacuum exhaust port.

[0041] The wet material inlet 1-4 and the dry material outlet 1-5 are staggered. Such a design increases the heat exchange stroke of the wet material and facilitates the discharge of the dry material.

[0042] A return water pump 12 is provided on the return water pipe 6. Such a design facilitates the return water to enter the first condenser 3.

[0043] The second condenser 4 is an integrated condenser, with a flash exhaust steam inlet at the top, a number of heat exchange risers in the middle, and a condensed water storage tank at the bottom. Cooling water system: Cooling water enters the lower cooling water inlet outside the heat exchange riser of the second condenser 4, and is discharged to a designated location from the upper cooling water outlet after absorbing heat.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A material drying system with industrial wastewater waste heat wrapping heat exchange, characterized in that: The invention comprises a material drying device (1), an evaporator (2), a first condenser (3) and a second condenser (4), wherein the material drying device (1) comprises a jacketed shell (1-1), a hollow sleeve shaft (1-2) rotatably mounted in the jacketed shell (1-1) and a plurality of hollow discs (1-3) fixedly mounted on the hollow sleeve shaft (1-2), the jacketed shell (1-1) is respectively provided with a wet material inlet (1-4) and a dry material outlet (1-5), each hollow disc (1-3) is connected to the hollow sleeve shaft (1-2), one end of the jacketed shell (1-1) and one end of the hollow sleeve shaft (1-2) are connected to the first condenser through a water supply pipe (5). The water supply port of the condenser (3), the other end of the jacketed shell (1-1) and the other end of the hollow sleeve shaft (1-2) are all connected to the water return port of the first condenser (3) through a water return pipe (6); the flash steam outlet of the evaporator (2) is connected to the steam inlet of the first condenser (3); the first condenser (3) is connected to a first vacuum pump (7); the flash exhaust steam outlet of the material drying equipment (1) is connected to the exhaust steam inlet of the second condenser (4); the second condenser (4) is connected to a second vacuum pump (8); and the waste heat circulating water respectively enters the jacketed shell (1-1), the hollow sleeve shaft (1-2) and the hollow disc (1-3) and is discharged through the water return pipe (6).

2. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 1 is characterized by: The jacketed housing (1-1) comprises an inner wall (1-11) which is cylindrical and closed at both ends, and an outer wall (1-12) which is sealed and arranged outside the inner wall (1-11); a cavity is formed between the inner wall (1-11) and the outer wall (1-12).

3. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 1 or 2, characterized in that: One end of the jacketed shell (1-1) is connected to the water supply pipe (5) via a water distribution pipe (1-6), and the other end of the jacketed shell (1-1) is connected to the water return pipe (6) via a water return pipe (1-7).

4. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 1 is characterized by: The hollow sleeve shaft (1-2) comprises an inner shaft (1-21) and an outer shaft (1-22) coaxially sleeved on the outer side of the inner shaft (1-21), wherein the inner shaft (1-21) is connected to the interior of a plurality of hollow discs (1-3) via a plurality of water outlet pipes (1-23), and the outer shaft (1-22) is connected to the interior of a plurality of hollow discs (1-3) via a plurality of water inlet pipes (1-24), and one end of the outer shaft (1-22) is closed, and the other end of the outer shaft (1-22) is connected to a water return pipe (6), and one end of the inner shaft (1-21) is connected to a water supply pipe (5), and the other end of the inner shaft (1-21) is closed.

5. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 4 is characterized by: One end of the inner shaft (1-21) and the other end of the outer shaft (1-22) are rotatably connected to the water supply pipe (5) and the water return pipe (6) respectively through an adapter (9).

6. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 1 is characterized by: One end or the other end of the hollow sleeve shaft (1-2) is driven to rotate via a motor (10) and a gearbox (11).

7. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 1 is characterized by: The flash exhaust steam outlet of the material drying equipment (1) is connected to a dust collector (1-8).

8. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 1 is characterized by: The wet material inlet (1-4) and the dry material outlet (1-5) are arranged in a staggered manner.

9. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 1 is characterized by: A return water pump (12) is provided on the return water pipe (6).

10. The material drying system of industrial wastewater waste heat wrapping heat exchange according to claim 1 is characterized by: The second condenser (4) is an integrated condenser, with a flash exhaust steam inlet at the top, a plurality of heat exchange risers arranged in the middle, and a condensate storage tank at the bottom.

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