CN214665907U

CN214665907U - Kerosene and oil gas coherent drying heat recovery equipment and kerosene and oil gas phase drying equipment

Info

Publication number: CN214665907U
Application number: CN202120333052.6U
Authority: CN
Inventors: 林伟林; 王月; 吴锐杰; 冯罗生
Original assignee: Zhongshan Kaixuan Vacuum Science and Technology Co Ltd
Current assignee: Zhongshan Kaixuan Vacuum Science and Technology Co Ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-09
Anticipated expiration: 2031-02-05

Abstract

The utility model provides a kerosene gas coherent drying heat recovery device and kerosene gas phase drying equipment. The kerosene gas coherent drying heat recovery device comprises a heat recoverer, a buffer tank, a first thermal resistor, a second thermal resistor and a control system. The recuperator includes a housing and a heat exchange coil mounted thereto. The housing includes an inlet end and an outlet end, and the heat exchange coil includes an inlet and an outlet. The buffer tank comprises a heat conduction oil inlet and a heat conduction oil outlet, the heat conduction oil inlet is communicated with the heat exchange coil outlet, and the heat conduction oil outlet is communicated with the heat exchange coil inlet through a pump. The first thermal resistor is arranged on the heat recoverer, and a sensor probe of the first thermal resistor extends into a cavity of the heat recoverer and is close to the air inlet end of the shell of the heat recoverer. The second thermal resistor is arranged in the buffer tank, and a sensor probe of the second thermal resistor extends into the heat conduction oil of the buffer tank. The control system is electrically connected with the first thermal resistor, the second thermal resistor and the pump. The control system compares the resistance signals transmitted by the first thermal resistor and the second thermal resistor to control the on and off of the pump.

Description

Kerosene and oil gas coherent drying heat recovery equipment and kerosene and oil gas phase drying equipment

Technical Field

The utility model relates to a dry heat recovery equipment technical field particularly, relates to a coherent heat recovery equipment of kerosene gas and kerosene gaseous phase drying equipment.

Background

In the kerosene gas phase drying equipment, a product is placed in a high-temperature vacuum drying tank for drying, and the space in the drying tank needs to be heated and vacuumized in the process. In the vacuumizing process, the vacuum system can extract hot air in the drying tank, the hot air is discharged to the atmospheric environment, and a large amount of heat energy is contained in the hot air, so that energy waste is caused. Moreover, the hot air with too high temperature will affect the performance of the vacuum system, and the vacuum element will be damaged by too high temperature, reducing the service life of the vacuum system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coherent drying heat recovery plant of kerosene gas. The kerosene gas coherent drying heat recovery device can exchange heat between hot gas and low-temperature heat transfer oil by comparing the temperature of the hot gas in the drying tank with the temperature of the heat transfer oil in the buffer tank.

Another object of the utility model is to provide a kerosene gas phase drying equipment.

For realizing the purpose of the utility model, the utility model adopts the following technical scheme:

according to an aspect of the utility model, a coherent drying heat recovery equipment of kerosene gas is provided. The kerosene gas coherent drying heat recovery device comprises a heat recoverer, a buffer tank, a first thermal resistor, a second thermal resistor and a control system. The heat recovery device comprises a cylindrical heat recovery device shell and a heat exchange coil, wherein the heat exchange coil is installed on the heat recovery device shell, the heat recovery device shell comprises an air inlet end and an air outlet end, and the heat exchange coil comprises a heat exchange coil inlet and a heat exchange coil outlet. The buffer tank comprises a heat conduction oil inlet and a heat conduction oil outlet, the heat conduction oil inlet is communicated with the heat exchange coil outlet, and the heat conduction oil outlet is communicated with the heat exchange coil inlet through a pump. The first thermal resistor is installed in the heat recoverer, and a sensor probe of the first thermal resistor extends into a cavity of the heat recoverer and is close to an air inlet end of a shell of the heat recoverer. The second thermal resistor is arranged in the buffer tank, and a sensor probe of the second thermal resistor extends into the heat conduction oil of the buffer tank. The control system is electrically connected to the first thermal resistor, the second thermal resistor, and the pump. Wherein the control system controls the pump to be turned on and off by comparing the resistance signals transmitted by the first and second thermal resistors.

According to the utility model discloses an embodiment, wherein, the heat recovery device still includes the support, the inlet end of heat recovery device is connected with first flange and gives vent to anger the end and be connected with second flange, wherein, the support mounting in first flange with second flange's the outside.

According to the utility model discloses an embodiment, wherein, heat exchange coil inlet is connected with third flange, the heat exchange coil inlet passes through third flange intercommunication the pump.

According to the utility model discloses an embodiment, wherein, heat exchange coil pipe exit linkage has fourth flange, the heat exchange coil pipe export is passed through fourth flange intercommunication the conduction oil entry of buffer tank.

According to the utility model discloses an embodiment, wherein, the coherent dry heat recovery equipment of kerosene gas still includes first liquid level switch, first liquid level switch install in heat recovery device and electricity are connected control system, the inductive head of first liquid level switch stretches into in the cavity of heat recovery device.

According to the utility model discloses an embodiment, wherein, the coherent dry heat recovery equipment of kerosene gas still includes second liquid level switch, second liquid level switch install in buffer tank and electricity are connected control system, the inductive head of second liquid level switch stretches into in the buffer tank.

According to the utility model discloses an embodiment, wherein, the heat recovery device still includes the filter screen, the filter screen is connected to second flange.

According to another aspect of the utility model, a kerosene gaseous phase drying equipment is provided. The kerosene gas phase drying device comprises a kerosene gas coherent drying heat recovery device, a drying tank and a vacuum system. The coal oil gas coherent dryness heat recovery device is the coal oil gas coherent dryness heat recovery device. The drying tank has hot gas therein. The vacuum system is used for vacuumizing. And the air inlet end of a heat recoverer in the kerosene gas coherent drying heat recovery device is communicated with the drying tank, and the air outlet end of the heat recoverer is communicated with the vacuum system.

According to the utility model discloses an embodiment, wherein, one side of drying cylinder is connected with first vacuum pipe, the inlet end of heat recovery device is connected with first connecting flange, the heat recovery device passes through first connecting flange is connected first vacuum pipe.

According to the utility model discloses an embodiment, wherein, one side of vacuum system is connected with second vacuum pipe, the end of giving vent to anger of heat recovery device is connected with second flange, the heat recovery device passes through second flange is connected second vacuum pipe.

The utility model provides an embodiment has following advantage or beneficial effect:

the utility model discloses a coherent dry heat recovery equipment of kerosene gas has heat recovery device, buffer tank, first thermal resistance, second thermal resistance and control system. The first thermal resistor senses the temperature of gas in the heat recoverer and transmits a temperature signal to the control system, the second thermal resistor senses the temperature of heat conducting oil in the buffer tank and transmits the temperature signal to the control system, the control system compares the temperature of the heat conducting oil and the temperature of the heat conducting oil, and when the temperature of the hot gas is higher than that of the heat conducting oil, the pump is started to exchange heat for the hot gas, so that the temperature of the hot gas is reduced, and the temperature of the heat conducting oil is increased; otherwise, the pump is closed and no heat exchange is carried out.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic diagram illustrating a kerosene vapor phase drying apparatus according to an exemplary embodiment.

Fig. 2 is a perspective view of a recuperator shown in accordance with an exemplary embodiment.

Fig. 3 is a schematic left view of a recuperator shown in accordance with an exemplary embodiment.

FIG. 4 is a schematic front cross-sectional view of a recuperator shown in accordance with an exemplary embodiment.

Wherein the reference numerals are as follows:

1. a drying tank; 2. a vacuum system; 3. a heat recovery device; 31. a heat recuperator housing; 32. heat exchange coil, 33, heat exchange coil inlet; 34. a heat exchange coil outlet; 35. a first connecting flange; 36. a second connecting flange; 37. a third connecting flange; 38. a fourth connecting flange; 39. a support; 4. a buffer tank; 5. a pump; 6. a first thermal resistor; 7. a second thermal resistor; 8. a control system; 9. a first liquid level switch; 10. a second liquid level switch; 11. a filter screen; 12. lifting lugs; 13. and (4) sheathing a heat-insulating layer.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

Fig. 1 to 4 show schematic diagrams of a kerosene vapor phase drying apparatus provided by the present invention in fig. 1. Fig. 2 shows a perspective view of a heat recovery device provided by the present invention. Fig. 3 shows a schematic left view of a heat recovery device provided by the present invention. Fig. 4 shows a schematic front sectional view of a heat recovery device provided by the present invention. The utility model discloses coherent heat recovery unit of kerosene gas includes heat recovery device 3, buffer tank 4, first thermal resistance 6, second thermal resistance 7 and control system 8. The heat recovery device 3 comprises a cylindrical heat recovery device shell 31 and a heat exchange coil 32, wherein the heat exchange coil 32 is installed on the heat recovery device shell 31, the heat recovery device shell 31 comprises an air inlet end and an air outlet end, and the heat exchange coil 32 comprises a heat exchange coil inlet 33 and a heat exchange coil outlet 34. The buffer tank 4 comprises a heat transfer oil inlet and a heat transfer oil outlet, the heat transfer oil inlet is communicated with a heat exchange coil outlet 34, and the heat transfer oil outlet is communicated with a heat exchange coil inlet 33 through a pump 5. The first thermal resistor 6 is mounted to the recuperator 3, and the sensor probe of the first thermal resistor 6 extends into the cavity of the recuperator 3 near the inlet end of the recuperator housing 31. The second thermal resistor 7 is arranged on the buffer tank 4, and a sensor probe of the second thermal resistor 7 extends into the heat conduction oil of the buffer tank 4. The control system 8 is electrically connected to the first and second

thermal resistors

6 and 7 and the pump 5. Wherein the control system 8 controls the pump 5 to be turned on and off by comparing the resistance signals transmitted by the first and

second heat resistors

6 and 7.

The heat recovery device 3 is a hollow cylindrical cylinder body which is horizontally arranged. The heat recoverer 3 adopts a pipeline type design, occupies small space, and is more attractive and concise as a whole. The left side of the heat recovery device 3 is an air inlet end and the right side is an air outlet end. The recuperator housing 31 has an armored thermal insulation layer 13. The direction of the hot air extracted from the drying tank 1 flowing through the heat recovery device 3 is X. The heat conducting oil enters the heat recovery device 3 from the heat exchange coil inlet 33 of the buffer tank 4 through the pump 5 to exchange heat with the hot gas, and then flows back to the buffer tank 4 from the heat exchange coil outlet 34 to be stored. A first thermal resistor (ST1)6 is mounted in the upper part of the recuperator housing 31 near the inlet end so that the part of the sensor probe of the first thermal resistor 6 that protrudes into the cavity of the recuperator 3 is near the inlet end. This facilitates sensing of the temperature of the hot gas entering the heat exchanger housing 31. And transmits the temperature signal to the control system 8. The second thermal resistor (ST2)7 is installed on the outer case of the buffer tank 4 where the portion of the conduction oil is stored, so that the sensor probe of the second thermal resistor 7 is extended into the conduction oil of the buffer tank 4 to sense the temperature of the conduction oil. The resistance signal is the temperature signal. The temperature signal is transmitted to the control system 8. Control system 8 compares two temperatures, and when the hot gas temperature that first thermal resistance 6 surveyed was greater than the heat conduction oil temperature that second thermal resistance 7 surveyed, the hot-blast heat energy of taking out in drying cylinder 1 can be used for carrying out the energy exchange, and control system 8 gives 5 start signals of pump this moment, makes the conduction oil circulation and carries out the energy exchange with hot-blast, can retrieve the heat utilization in the hot-blast. When the temperature of hot gas measured by the first thermal resistor 6 is less than or equal to the temperature of heat conduction oil measured by the second thermal resistor 7, the temperature of the heat conduction oil in the heat conduction buffer tank 4 is higher than the temperature of the hot air pumped out, the heat conduction oil which is high in temperature is not conveyed to the heat recoverer 3 at the moment, and the control system 8 gives a stop signal to the pump 5 to prevent the energy loss of the heat conduction oil.

In a preferred embodiment of the invention, the heat recovery unit 3 comprises a bracket 39, a first connecting flange 35 and a second connecting flange 36. The inlet end of the heat recovery device 3 is connected with a first connecting flange 35 and the outlet end is connected with a second connecting flange 36, wherein the bracket 39 is mounted on the outer sides of the first connecting flange 35 and the second connecting flange 36.

As shown in fig. 2 to 3, threaded holes are symmetrically formed along the circumference of the outer sides of the first and

second connection flanges

35 and 36, and the bracket 39 is fixedly mounted in the threaded holes by bolts. The heat recovery device 3 can be mounted on the housing of the drying cylinder 1 through a bracket 39, which is convenient for use. Further, a pair of lifting lugs 12 may be provided on the outer upper portion of the heat recovery unit case 31 to facilitate the suspension of the heat recovery unit 3.

In a preferred embodiment of the present invention, a third connecting flange 37 is connected to the heat exchanging coil inlet 33, and the heat exchanging coil inlet 33 communicates with the pump 5 through the third connecting flange 37.

As shown in fig. 1 and 4, an oil inlet is formed in the heat recovery unit 3 at the heat exchange coil inlet 33, and the third connecting flange 37 is connected to the heat exchange coil inlet 33 passing through the oil inlet and is communicated with the pump 5 through a pipeline, so as to communicate with a heat conduction oil outlet of the buffer tank 4.

In a preferred embodiment of the present invention, the heat exchanging coil outlet 34 is connected to a fourth connecting flange 38, and the heat exchanging coil outlet 34 is communicated with the heat conducting oil inlet of the buffer tank 4 through the fourth connecting flange 38.

As shown in fig. 1 and 4, the heat recovery unit 3 at the outlet 34 of the heat exchange coil is provided with an oil outlet, and the fourth connecting flange 38 is connected with the outlet 34 of the heat exchange coil passing through the oil outlet and is communicated with the heat-conducting oil inlet of the buffer tank 4 through a pipeline.

In a preferred embodiment of the present invention, the kerosene coherent drying heat recovery apparatus comprises a first liquid level switch 9, a heat recovery unit 3 and a control system 8. The first liquid level switch 9 is installed in the heat recovery device 3 and electrically connected with the control system 8, and an induction head of the first liquid level switch 9 extends into a cavity of the heat recovery device 3.

As shown in fig. 2 and 4, a first level switch (SL1)9 is mounted on the lower side of the recuperator 3, and its induction head protrudes into the interior of the recuperator 3. The first liquid level switch 9 is used for detecting whether the heat exchange coil 32 leaks, when the heat exchange coil 32 leaks, the heat conduction oil flows into the heat recovery device shell 31 and converges at the lower part of the shell, and at the moment, the induction head of the first liquid level switch 9 can induce the liquid and transmit a signal to the control system 8. The control system 8 sends a stop signal to the pump 5 and gives an alarm to remind of overhauling the heat recovery device 3; the alarm is sent out immediately and the maintenance can prevent a large amount of heat conducting oil from entering the vacuum system 2 along with the gas and damaging vacuum elements such as a vacuum pump and the like.

In a preferred embodiment of the present invention, the kerosene coherent drying heat recovery apparatus comprises a second level switch 10, a buffer tank 4 and a control system 8. The second liquid level switch 10 is installed in the buffer tank 4 and electrically connected to the control system 8, and an inductive head of the second liquid level switch 10 extends into the buffer tank 4.

As shown in fig. 1 to 2, a second liquid level switch (SL2)10 is used to detect the liquid level in the thermal oil buffer tank 4. The second liquid level switch 10 is mounted on the outer housing of the buffer tank 4. And the inductive head of the second liquid level switch 10 extends into the buffer tank 4 to a predetermined depth. When the liquid level is lower than the set liquid level, the quantity of the heat-conducting oil in the buffer tank 4 is not enough to provide the circulation of the heat recovery device 3, the pump 5 is caused to idle, the loss of electric energy is increased when the pump 5 is damaged, the heat exchange effect cannot be achieved, and at the moment, the control system 8 sends a stop signal to the pump 5 and gives an alarm to remind related personnel to add the heat-conducting oil.

In a preferred embodiment of the present invention, the heat recovery unit 3 comprises a filter screen 11 and a second connecting flange 36, the filter screen 11 being connected to the second connecting flange 36.

As shown in fig. 4, a filter screen 11 is additionally arranged in the heat recovery device 3 for filtering out impurities in hot air, large-particle molecular oil impurities and the like, so as to prevent the impurities from entering the vacuum system 2 and damaging vacuum elements such as a vacuum pump and the like.

Preferably, the heat exchange coil 32 is helical. The spiral-shaped heat exchange coil 32 increases the heat exchange length, increases the heat exchange area, and thus achieves high heat exchange efficiency in a limited space.

As shown in FIG. 1, FIG. 1 shows a schematic diagram of a kerosene vapor phase drying apparatus provided by the present invention. The utility model discloses coherent drying hot equipment of kerosene gas includes coherent drying hot recovery plant of kerosene gas, drying cylinder 1 and vacuum system 2. The coal oil gas coherent dryness heat recovery device is the coal oil gas coherent dryness heat recovery device. The drying cylinder 1 has therein hot gas. The vacuum system 2 is used for vacuum pumping. Wherein, the air inlet end of a heat recoverer 3 in the kerosene gas coherent drying heat recovery device is communicated with the drying tank 1, and the air outlet end is communicated with the vacuum system 2.

Heating means are provided in the drying tank 1 for forming hot gas in the drying tank 1 for drying the apparatus. The heat recoverer 3, the vacuum system 2 and the drying tank 1 form a closed space. The vacuum system 2 is started to vacuumize the drying tank 1, and the pumped hot gas enters the heat recoverer shell 31 through the air inlet end of the heat recoverer 3 and enters the vacuum system 2 through the air outlet end.

In a preferred embodiment of the present invention, a first vacuum pipe is connected to one side of the drying tank 1. The inlet end of the heat recovery unit 3 is connected to a first connecting flange 35. The heat recovery device 3 is connected to the first vacuum line via a first connecting flange 35.

As shown in fig. 1 to 3, the inlet end of the heat recovery unit 3 may be connected to the first connecting flange 35 by bolts or the like. A gasket may be provided between the heat recovery unit 3 and the first connection flange 35 to increase sealability. A first vacuum pipe is connected to one side of the drying tank 1 near the air inlet end, or the drying tank 1 and the first vacuum pipe may be integrally formed. The flange connection is also convenient to replace.

In a preferred embodiment of the invention, a second vacuum line is connected to one side of the vacuum system 2. The air outlet end of the heat recoverer 3 is connected with a second connecting flange 36, and the heat recoverer 3 is connected with a second vacuum pipeline through the second connecting flange 36.

As shown in fig. 1 to 3, the outlet end of the heat recovery unit 3 may be connected to the second connection flange 36 by bolts or the like. A gasket may be provided between the recuperator 3 and the second connecting flange 36 to increase the sealing. One side of the air outlet end of the drying tank 1 is connected with a second vacuum pipeline, or the drying tank 1 and the second vacuum pipeline can be integrally formed.

The embodiment of the utility model provides a coherent drying heat recovery plant of kerosene gas and kerosene gaseous phase drying equipment. In the kerosene gas phase drying equipment, a drying tank 1, a vacuum system 2 and a heat recoverer 3 of the kerosene gas coherent drying heat recovery equipment are communicated, and hot gas in the drying tank 1 enters the vacuum system 2 through the heat recoverer 3 under the action of the vacuum system 2. The first thermal resistance 6 senses the temperature of the hot gas in the recuperator 3 and transmits a temperature signal into the control system 8. The second thermal resistor 7 senses the temperature of the thermal oil in the buffer tank 4 and transmits a temperature signal to the control system 8. Control system 8 compares first thermal resistance 6 and the temperature signal that control system 8 was transmitted to second thermal resistance 7, when the temperature signal of first thermal resistance 6 transmission was greater than the temperature of second thermal resistance 7 transmission, opens pump 5 and carries out the heat transfer to the hot gas to reduce the temperature of hot gas and improve the temperature of conduction oil, when the temperature signal of first thermal resistance 6 transmission was less than or equal to the temperature of second thermal resistance 7 transmission, then closed pump 5 and not carried out the heat transfer. The temperature reduction of the hot gas entering the vacuum system 2 effectively protects the original parts of the vacuum system 2 and increases the service life thereof. The heated heat conducting oil flows back to the buffer tank 4 for storage and standby, so that the heat of the vacuumized hot gas is recycled.

In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" are used for indicating the position or the positional relationship based on the position or the positional relationship shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but not for indicating or implying that the indicated device or unit must have a specific direction, be constructed and operated in a specific position, and thus, should not be construed as limiting the embodiments of the present invention.

In the description herein, the description of the terms "one embodiment," "a preferred embodiment," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A coherent drying heat recovery apparatus for kerosene comprises:

the heat recovery device comprises a heat recovery device (3), wherein the heat recovery device (3) comprises a cylindrical heat recovery device shell (31) and a heat exchange coil (32), the heat exchange coil (32) is installed on the heat recovery device shell (31), the heat recovery device shell (31) comprises an air inlet end and an air outlet end, and the heat exchange coil (32) comprises a heat exchange coil inlet (33) and a heat exchange coil outlet (34);

the buffer tank (4) comprises a heat conduction oil inlet and a heat conduction oil outlet, the heat conduction oil inlet is communicated with the heat exchange coil outlet (34), and the heat conduction oil outlet is communicated with the heat exchange coil inlet (33) through a pump (5);

the first thermal resistor (6) is mounted on the heat recoverer (3), and a sensor probe of the first thermal resistor (6) extends into a cavity of the heat recoverer (3) and is close to the air inlet end of the heat recoverer shell (31);

the second thermal resistor (7), the second thermal resistor (7) is installed on the buffer tank (4), and a sensor probe of the second thermal resistor (7) extends into the heat conduction oil of the buffer tank (4); and

a control system (8), said control system (8) electrically connecting said first thermal resistance (6), said second thermal resistance (7) and said pump (5);

wherein the control system (8) controls the pump (5) to be switched on and off by comparing the resistance signals transmitted by the first thermal resistor (6) and the second thermal resistor (7).

2. The kerosene coherent drying heat recovery apparatus according to claim 1, wherein the heat recovery unit (3) further comprises a bracket (39), an inlet end of the heat recovery unit (3) is connected with a first connecting flange (35) and an outlet end of the heat recovery unit is connected with a second connecting flange (36), wherein the bracket (39) is installed outside the first connecting flange (35) and the second connecting flange (36).

3. The kerosene coherent drying heat recovery apparatus according to claim 1, wherein a third connecting flange (37) is connected to the heat exchange coil inlet (33), and the heat exchange coil inlet (33) communicates with the pump (5) through the third connecting flange (37).

4. The kerosene coherent drying heat recovery apparatus according to claim 1, wherein a fourth connecting flange (38) is connected to the heat exchange coil outlet (34), and the heat exchange coil outlet (34) is communicated with the conduction oil inlet of the buffer tank (4) through the fourth connecting flange (38).

5. The kerosene coherent drying heat recovery device according to claim 1, further comprising a first liquid level switch (9), wherein the first liquid level switch (9) is installed in the heat recovery unit (3) and electrically connected to the control system (8), and an induction head of the first liquid level switch (9) extends into a cavity of the heat recovery unit (3).

6. The kerosene coherent drying heat recovery device according to claim 1, further comprising a second liquid level switch (10), wherein the second liquid level switch (10) is installed in the buffer tank (4) and electrically connected to the control system (8), and an inductive head of the second liquid level switch (10) extends into the buffer tank (4).

7. A kerosene coherent drying heat recovery device according to claim 2, characterized in that said heat recoverer (3) further comprises a filter screen (11), said filter screen (11) being connected to said second connecting flange (36).

8. A kerosene vapor phase drying apparatus, characterized by comprising:

a kerosene and gas coherent dryness heat recovery apparatus, the kerosene and gas coherent dryness heat recovery apparatus being the kerosene and gas coherent dryness heat recovery apparatus according to any one of claims 1 to 7;

the drying device comprises a drying tank (1), wherein hot gas is arranged in the drying tank (1); and

a vacuum system (2), the vacuum system (2) being used for evacuating;

the gas inlet end of a heat recoverer (3) in the kerosene gas coherent drying heat recovery device is communicated with the drying tank (1), and the gas outlet end of the heat recoverer is communicated with the vacuum system (2).

9. A kerosene gas phase drying apparatus according to claim 8, wherein a first vacuum pipe is connected to one side of said drying tank (1), a first connecting flange (35) is connected to an inlet end of said heat recovery unit (3), and said heat recovery unit (3) is connected to said first vacuum pipe through said first connecting flange (35).

10. A kerosene gas phase drying apparatus according to claim 8, wherein a second vacuum pipe is connected to one side of said vacuum system (2), a second connecting flange (36) is connected to an air outlet end of said heat recovery unit (3), and said heat recovery unit (3) is connected to said second vacuum pipe through said second connecting flange (36).