Acetic acid rectification energy-saving device and method based on energy integration

Abstract

The acetic acid rectification energy-saving device comprises a rectifying tower, an evaporator located on the lower portion of the rectifying tower and a condenser located on the top of the rectifying tower, multiple layers of tower plates are arranged in the rectifying tower, the tower plates are gradually lengthened from top to bottom, airflow holes allowing steam to pass through are formed in the tower plates, and the side wall of the exterior of the rectifying tower is of a cavity structure. A vertical heat supply steam pipe is arranged on one side in the cavity structure, a vertical backflow steam pipe is arranged on the other side in the cavity structure, a plurality of layers of sealing partition plates are arranged in the cavity structure and divide the cavity structure into a plurality of closed cavities, and each sealing partition plate is located between every two adjacent tower plates so that each closed cavity can directly face the corresponding tower plate; the heat supply steam pipe and the backflow steam pipe both penetrate through each closed cavity, an air inlet is formed in the position, corresponding to each tower plate, in the heat supply steam pipe, and an air inlet control assembly for controlling the air inlet to be opened or closed is arranged at the air inlet.

Description

Technical Field

[0001] The present application relates to the technical field of distillation devices, and in particular to an acetic acid distillation energy-saving device and method based on energy integration. Background Art

[0002] Distillation technology is the most widely used unit operation in the chemical industry. Although it has many advantages, it is also the part with high energy consumption and investment in the industrial process. In the chemical industry and other industries, its energy consumption accounts for more than half of the total energy consumption of the whole process. Therefore, the thermodynamic efficiency of the distillation tower can be improved by designing a new tower structure to reduce energy consumption. The most representative of them is the dividing wall tower, which refers to setting a vertical partition inside the distillation tower to divide the distillation tower into four main parts: the top section, the bottom section, the feed section separated by the partition, and the intermediate side product extraction section. Generally speaking, for the separation of a ternary mixture, two conventional towers are required to separate in sequence to obtain three different pure components using a conventional distillation tower, while in the dividing wall tower, only a single tower is needed to obtain all components at the same time and can meet the specified precision separation requirements. Compared with the traditional two conventional tower sequence process, it can save 30-60% energy, save about 30% equipment investment, and increase the operating capacity.

[0003] A distillation tower is generally divided into an upper distillation section and a lower stripping section. A feed port is set at the contact position of the two sections. The upper opening of the distillation section is connected to a condenser, and the condenser is connected to a reflux device. The reflux device injects the reflux liquid condensed by the condenser into the distillation tower from the reflux port opened in the upper half of the distillation section to realize repeated distillation. However, the steam temperature in the distillation tower will gradually decrease with the height. The distillation process in the upper half, especially the distillation section, is the most important, so temperature control is crucial. The upper part of the distillation tower needs to be heated. At the same time, some of the liquid to be treated that flows out of the reflux device in the second half of the distillation can only exist in a limited number of tower plates on the upper side. If the whole is heated, it will cause a waste of resources.

[0004] With respect to the above-mentioned related technologies, the inventors believe that there are defects such as inconvenience in heating and waste of resources. Summary of the invention

[0005] In order to solve the above technical problems, one of the solutions of the present application is to provide an acetic acid distillation energy-saving device based on energy integration.

[0006] The present application provides an acetic acid distillation energy-saving device based on energy integration, which adopts the following technical solution: An acetic acid distillation energy-saving device based on energy integration comprises a distillation tower, an evaporator located at the lower part of the distillation tower and a condenser located at the top of the distillation tower, the distillation tower is equipped with multiple layers of tower plates, the tower plates gradually become longer from top to bottom, and the tower plates are provided with air flow holes for steam to pass through, the side wall outside the distillation tower is a cavity structure, a vertical heating steam pipe is arranged on one side of the cavity structure, and a vertical reflux steam pipe is arranged on the other side, and multiple layers of sealing partitions are arranged in the cavity structure, and the sealing partitions divide the cavity structure into a plurality of closed chambers, each of the sealing partitions is located between two adjacent tower plates so that each closed chamber is directly opposite to the tower plate, the heating steam pipe and the reflux steam pipe both pass through each closed chamber, an air inlet is opened in the heating steam pipe corresponding to each tower plate position, and an air outlet is opened on the reflux steam pipe corresponding to each tower plate position; a control device for controlling the opening or closing of the air inlet is arranged at the air inlet The air inlet control component is an air inlet control component that can be opened or closed, and the air outlet is provided with an air outlet control component that controls the opening or closing of the air outlet; the air inlet control component includes a first rubber contact block arranged at a position corresponding to the air inlet in the cavity structure, an air inlet baffle is arranged between the first rubber contact block and the air inlet of the heating steam pipe, and when the first rubber contact block is in a natural state, the air inlet baffle tightly contacts the air inlet of the heating steam pipe; the air outlet control component includes a second rubber contact block arranged at a position corresponding to the air outlet in the cavity structure, an air outlet baffle is arranged between the second rubber contact block and the air inlet of the reflux steam pipe, and when the second rubber contact block is in a natural state, the air outlet baffle tightly contacts the air outlet of the reflux steam pipe; the air inlet baffle is a heat-conducting baffle, the air outlet baffle is a heat-insulating baffle, and a spring sheet in a compressed state is arranged between the air outlet baffle and the air outlet.

[0007] By adopting the above technical solution, the heating steam pipe is arranged in the cavity structure and runs through all the closed chambers, so that each closed chamber can be heated from top to bottom through the heating steam pipe to provide the required compensation temperature, and the air inlet control component and the air outlet control component are used to control which closed chamber the air enters, so that the temperature compensation of the entire distillation tower can be easily performed; the first rubber resistance block has a higher hardness under low temperature conditions, so when temperature compensation is not required, the corresponding air inlet baffle is controlled to resist at the air inlet of the corresponding heating steam pipe through the hardness of the first rubber resistance block, and when the airflow in the heating steam pipe passes through the corresponding chamber, the heat-conducting baffle of each chamber will absorb heat, and the heat is transferred to the corresponding first rubber resistance block. The first rubber resistance block softens after absorbing heat, so that the air inlet baffle is separated from the corresponding air inlet, so that the steam enters the corresponding closed chamber, and then the distillation tower corresponding to the area is supplemented with heating. When the corresponding closed chamber is in a high temperature state, the second rubber resistance block is deformed, so that the air outlet baffle is separated from the air outlet under the action of the spring sheet, and then the steam can enter the reflux steam pipe through the air outlet, which is convenient for reuse. Since the heating steam pipe is heated from top to bottom, and the distillation tower is heated from bottom to top, it is possible to try to level the upper and lower temperatures of the airflow in the distillation tower and improve the distillation effect. By adopting the above technical solution, multiple closed chambers are arranged in the cavity structure of the distillation tower during use.

[0008] Preferably, a diverter device is provided at the position of the air inlet baffle corresponding to the air inlet of the heating steam pipe, and the diverter device includes a diverter block fixedly connected to the air inlet baffle, and the diverter block can divide the airflow to both sides. A collecting trough plate is fixedly connected to the air inlet of the heating steam pipe, and the steam entering the air inlet is concentrated at the collecting trough plate and then diverted to both sides through the diverter block.

[0009] By adopting the above technical solution, due to the setting of the collecting trough plate, the airflow can be blown to the diverter block according to a predetermined trajectory, and then diverted to both sides through the diverter block, further allowing the steam to quickly fill the entire closed chamber, thereby improving the heating efficiency.

[0010] Preferably, the heating steam pipe and the return steam pipe are both attached to the outer wall of the cavity structure, gaps are left between the heating steam pipe and the return steam pipe and the inner wall of the cavity structure, and the air inlet and the air outlet are both facing the corresponding gaps.

[0011] By adopting the above technical solution, a gap is left between the heating steam pipe and the inner side of the cavity structure, so that the steam from the heating steam pipe can be quickly filled into the entire closed cavity from both sides.

[0012] Preferably, a slot is provided on the inner wall of the distillation tower corresponding to the position of the tower plate, the tower plate is inserted in the slot, a rotating shaft is provided in the slot, the tower plate is rotatably connected to the rotating shaft, an upper limit block for limiting the flipping of the tower plate is fixedly connected on the upper side of the slot and corresponding to the inner wall of the distillation tower cavity structure, and a locking assembly is provided between the tower plate and the air inlet baffle.

[0013] By adopting the above technical solution, the tower plate is inserted into the slot, and a rotating shaft is arranged in the slot. When the reflux pipe on the upper side of the distillation tower refluxes the cooled liquid into the distillation tower, it will first fall on the upper tower plate, and then fall on the lower tower plate in sequence from top to bottom. When falling on the tower plate, the tower plate will rotate under the action of gravity. Through this rotation, it can be controlled whether the air inlet baffle is stuck, so that only when the liquid flows to the corresponding tower plate, the closed chamber on the corresponding side will be filled with high-temperature steam, which is convenient for temperature compensation and can have a good energy-saving effect.

[0014] Preferably, a slot is provided on the upper side of the air inlet baffle, and the locking assembly includes an L-shaped locking plate. When there is no material on the tower plate, the L-shaped locking plate is inserted into the slot to close the air inlet.

[0015] By adopting the above technical solution, the locking assembly includes an L-shaped locking plate. When the liquid refluxed in the reflux pipe falls on the corresponding tower plate, the tower plate will rotate, thereby controlling the rotation of the L-shaped locking plate inserted in the slot to disengage from the air intake baffle. At this time, since the air intake baffle has thermal conductivity, the first rubber resistance block will be deformed. Since the steam intake pipe has high pressure, the steam can enter the corresponding closed chamber, thereby facilitating temperature compensation and improving practical value.

[0016] Preferably, a plurality of groups of drainage lines are provided between adjacent tower plates, one end of each drainage line is fixedly connected to the outer end of one of the tower plates, and the other end is fixedly connected to the outer end of another tower plate, and the drainage lines are always in an inclined state.

[0017] By adopting the above technical solution, a drainage line is set up so that the liquid on the upper tower plate can be led to the lower tower plate through the drainage line. If there is no drainage line, the liquid on the upper tower plate is prone to splashing when falling into the lower tower plate. This method can reduce the possibility of liquid splashing directly to the bottom of the tower.

[0018] Preferably, an energy recovery component is provided at the upper portion of the distillation tower, and the energy recovery component includes a solar power supply device and a wind power supply device. A mixing heating box is connected to the air inlet of the heating steam pipe, and a heating component is provided at the mixing heating box. A connecting pipeline is connected to the mixing heating box, and the connecting pipeline is connected to the air outlet of the evaporator. A fresh air supply inlet is provided on the connecting pipeline.

[0019] By adopting the above technical solution, during normal use, electricity is collected through the energy recovery component, and then the steam heating in the mixing heating box is controlled, and then added to the heating steam pipe, and finally reaches each closed chamber for temperature compensation.

[0020] Preferably, the liquid inlet end of the evaporator is connected to a liquid inlet pipe, the other end of the liquid inlet pipe is connected to the bottom of the distillation tower, and the gas outlet of the evaporator is connected to the steam inlet of the distillation tower.

[0021] In order to solve the above technical problems, another solution of the present application is to provide an acetic acid distillation energy-saving method based on energy integration.

[0022] The present application provides an acetic acid distillation energy-saving method based on energy integration, which adopts the following technical solution: An acetic acid distillation energy-saving method based on energy integration, comprising: Step 1, controlling the evaporator to open so that steam enters the distillation tower through the steam inlet; Step 2, the liquid to be distilled is fed into the distillation tower from the feed inlet in the middle of the distillation tower; Step 3, opening one or more air inlets from top to bottom through the air intake control component; Step 4: Control part of the steam to enter the corresponding closed chamber from top to bottom through the heating steam pipe for temperature compensation.

[0023] By adopting the above technical solution, during use, a plurality of closed chambers are arranged in the cavity structure of the distillation tower, and the heating steam pipe is arranged in the cavity structure and runs through all the closed chambers. Therefore, each closed chamber can be heated from top to bottom through the heating steam pipe to provide the required compensation temperature. The air inlet control component and the air outlet control component are used to control which closed chamber the air enters, thereby conveniently performing temperature compensation on the entire distillation tower.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. During use, a plurality of closed chambers are arranged in the cavity structure of the distillation tower, and a heating steam pipe is arranged in the cavity structure and runs through all the closed chambers. Therefore, each closed chamber can be heated from top to bottom through the heating steam pipe to provide the required compensation temperature. The air inlet control component and the air outlet control component are used to control which closed chamber the air enters, thereby conveniently performing temperature compensation on the entire distillation tower.

[0025] 2. The first rubber abutment block has a high hardness at low temperature. Therefore, when temperature compensation is not required, the corresponding air inlet baffle is controlled to abut against the air inlet of the corresponding heating steam pipe by the hardness of the first rubber abutment block. When the airflow in the heating steam pipe passes through the corresponding chamber, the heat-conducting baffle corresponding to each chamber absorbs heat. At this time, the heat is transferred to the corresponding first rubber abutment block. The first rubber abutment block softens after absorbing heat, so that the air inlet baffle is separated from the corresponding air inlet, so that the steam enters the corresponding closed chamber, and then the distillation tower corresponding to the area is supplemented with heating. When the corresponding closed chamber is in a high temperature state, the second rubber abutment block is deformed, so that the air outlet baffle is separated from the air outlet under the action of the spring sheet, and then the steam can enter the reflux steam pipe through the air outlet for reuse. Since the heating steam pipe is heated from top to bottom, and the distillation tower is heated from bottom to top, the upper and lower temperatures of the airflow in the distillation tower can be leveled as much as possible to improve the distillation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the embodiment; Figure 2 is a schematic diagram highlighting the location of the return steam pipe and the heating steam pipe; Figure 3 It is a structural schematic diagram highlighting energy-saving heating in the embodiment; Figure 4 It is a schematic diagram highlighting the connection structure of the shunt block in the embodiment.

[0027] Explanation of the reference numerals: 1. distillation tower; 11. feed pipe; 12. tower plate; 13. slot; 131. rotating shaft; 132. sealing strip; 133. upper limit block; 134. drainage line; 14. energy recovery component; 141. mixing heating box; 15. sealing partition; 151. closed chamber; 2. evaporator; 21. liquid inlet pipe; 3. condenser; 31. reflux port; 32. discharge pipe; 4. heating steam pipe; 41. first rubber resistance block; 42. air inlet baffle; 43. diverter block; 44. collecting trough plate; 45. L-shaped locking plate; 5. reflux steam pipe; 51. second rubber resistance block; 52. air outlet baffle; 53. spring. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4This application is described in further detail.

[0029] The present application embodiment discloses an acetic acid distillation energy-saving device based on energy integration; Figure 1 and Figure 3 , comprising a distillation tower 1, an evaporator 2 located at the lower part of the distillation tower 1 and a condenser 3 located at the top of the distillation tower 1, a liquid inlet pipe 21 is connected to the liquid inlet end of the evaporator 2, and the other end of the liquid inlet pipe 21 is connected to the bottom of the distillation tower 1, so that the liquid at the bottom of the distillation tower 1 can flow into the evaporator 2, and is heated by steam to form steam, and the gas outlet of the evaporator 2 is connected to the steam inlet of the distillation tower 1; a feed pipe 11 is connected to the middle position of the distillation tower 1, and the liquid to be distilled is injected into the distillation tower 1 from the feed pipe 11, a steam discharge port is arranged at the middle position of the top of the distillation tower 1, a reflux port 31 is arranged at the top of the distillation tower 1 next to the discharge port, the gas inlet of the condenser 3 is connected to the discharge port at the top of the distillation tower 1, the liquid outlet of the condenser 3 is connected to the reflux port 31, and the liquid outlet of the condenser 3 is also connected to a discharge pipe 32, so as to facilitate the outflow of the distilled liquid.

[0030] The distillation tower 1 is provided with a plurality of trays 12, which gradually become longer from top to bottom. Each tray 12 is provided with a gas flow hole for steam to pass through. The side wall of the distillation tower 1 is a cavity structure. A slot 13 is provided on the inner wall of the cavity structure at a position corresponding to the tray 12. A rotating shaft 131 is provided in the slot 13. The corresponding tray 12 is rotatably connected to the rotating shaft 131. A sealing strip 132 is provided on the inner wall of the distillation tower 1 at a position corresponding to the slot 13; the slot 13 is in a sealed state. Due to the sealing strip The existence of 132 enables the tower plate 12 to rotate freely; an upper limit block 133 for limiting the flipping of the tower plate 12 is fixedly connected to the inner wall of the cavity structure, and a drainage line 134 is provided between the upper and lower adjacent tower plates 12. There are multiple drainage lines 134, one end of the drainage line 134 is fixedly connected to the outer end of one of the tower plates 12, and the other end is fixedly connected to the outer end of the other tower plate 12. At the same time, since the upper and lower tower plates 12 are located at different heights, the drainage line 134 is always in an inclined state.

[0031] Reference Figure 2 and Figure 3A vertical heating steam pipe 4 is arranged on one side of the cavity structure, and a vertical reflux steam pipe 5 is arranged on the other side. The heating steam pipe 4 and the reflux steam pipe 5 are parallel to each other. An energy recovery component 14 is arranged on the upper part of the distillation tower 1. The energy recovery component 14 includes a solar power supply device and a wind power supply device. The upper air inlet of the heating steam pipe 4 is located at the uppermost side, and a mixing heating box 141 is connected to the upper air inlet of the heating steam pipe 4. A heating component is arranged in the mixing heating box 141. A connecting pipeline is connected to the mixing heating box 141, and the connecting pipeline is connected to the air outlet of the evaporator 2. A fresh air supply inlet is arranged on the connecting pipeline.

[0032] A plurality of transverse sealing partitions 15 are arranged in the cavity structure, and the cavity structure is divided into a plurality of closed chambers 151 by the sealing partitions 15, and each sealing partition 15 is located at the vertical middle position of two adjacent tower plates 12, so that each closed chamber 151 faces a tower plate 12; wherein the heating steam pipe 4 and the reflux steam pipe 5 both pass through each closed chamber 151; an air inlet is opened in the heating steam pipe 4 corresponding to the position of each tower plate 12, and an air outlet is opened on the reflux steam pipe 5 corresponding to the position of each tower plate 12; the heating steam pipe 4 and the reflux steam pipe 5 are both attached to the outer wall of the cavity structure, and there are gaps between the heating steam pipe 4 and the reflux steam pipe 5 and the inner wall of the cavity structure, and the air inlet and the air outlet are both facing the corresponding gaps.

[0033] An air inlet control component is provided at the air inlet to control the opening or closing thereof, and an air outlet control component is provided at the air outlet to control the opening or closing thereof.

[0034] Among them, the air intake control component includes a first rubber contact block 41 arranged at a position corresponding to the air inlet in the cavity structure, an air intake baffle 42 is arranged between the first rubber contact block 41 and the air inlet of the heating steam pipe 4, and the air intake baffle 42 is a heat-conducting baffle; when the first rubber contact block 41 is in a natural state, the air intake baffle 42 tightly contacts the air inlet of the heating steam pipe 4; the air outlet control component includes a second rubber contact block 51 arranged at a position corresponding to the air outlet in the cavity structure, an air outlet baffle 52 is arranged between the second rubber contact block 51 and the air inlet of the reflux steam pipe 5, and the air outlet baffle 52 is a heat-insulating baffle, and a spring sheet 53 in a compressed state is arranged between the air outlet baffle 52 and the air outlet; when the second rubber contact block 51 is in a natural state, the air outlet baffle 52 tightly contacts the air outlet of the reflux steam pipe 5; a diversion device is arranged at the position of the air intake baffle 42 corresponding to the air inlet of the heating steam pipe 4.

[0035] Reference Figure 3 and Figure 4The diversion device includes a diversion block 43 fixedly connected to the air inlet baffle 42, and the diversion block 43 can divide the airflow to both sides. A collecting trough plate 44 is fixedly connected to the air inlet of the heating steam pipe 4. The steam entering the air inlet is concentrated at the collecting trough plate 44 and then diverted to both sides through the diversion block 43.

[0036] A locking assembly is provided between the tower plate 12 and the air inlet baffle 42. A notch is provided on the upper side of the air inlet baffle 42. The locking assembly includes an L-shaped locking plate 45. The opening of the L-shaped locking plate 45 is arranged downward. In a natural state, the L-shaped locking plate 45 is inserted into the notch so that the air inlet baffle 42 is tightly pressed against the air inlet pipe of the heating steam pipe 4. At this time, the steam in the heating steam pipe 4 will not enter the corresponding closed chamber 151. When there is no material on the tower plate 12, the L-shaped locking plate 45 is inserted into the notch so that the air inlet of the heating steam pipe 4 is closed.

[0037] The working principle of an acetic acid distillation energy-saving device based on energy integration in this application is: When the liquid to be distilled is distilled, the liquid to be distilled is first added to the feed port at the middle position of the distillation tower 1, and steam is injected into the steam inlet at the bottom of the distillation tower 1. The steam is mainly supplied by the evaporator 2. At this time, the liquid to be distilled will be mixed with vapor and liquid under the action of the steam, and will rise with the steam to the upper steam outlet and be discharged. Under the action of the condenser 3, it will flow from the reflux port 31 to the distillation tower 1 to continue the distillation process. At this time, the liquid will fill the corresponding tower plate 12 from top to bottom in sequence. Due to the inflow of liquid on the tower plate 12, the side with the added liquid is heavier. At this time, the tower plate 12 will tilt slightly, so that the L-shaped lock plate 45 will be out of the groove. mouth; when the above work is carried out, since the steam outlet of the evaporator 2 is also connected to the heating steam pipe 4, the steam is injected into the heating steam pipe 4 from top to bottom, and a positive pressure is formed in the heating steam pipe 4 at this time; since the air inlet baffle 42 is thermally conductive, and the L-shaped locking plate 45 is separated from the notch, the first rubber resistance block 41 is deformed by heat, and then the steam enters the closed chamber 151 corresponding to the rotating tower plate 12 through the heating steam pipe 4, and the distillation tower 1 at this position is compensated for by heating. Only when the liquid flows onto the corresponding tower plate 12 and causes the tower plate 12 to tilt, the closed chamber 151 at the corresponding position will be opened, so that resources can be effectively saved.

[0038] The present application also claims protection for an acetic acid distillation energy-saving method based on energy integration, comprising the following steps: An acetic acid distillation energy-saving method based on energy integration, comprising: Step 1, controlling the evaporator 2 to open so that steam enters the distillation tower 1 through the steam inlet; Step 2, the liquid to be distilled is introduced into the distillation tower 1 from the feed inlet in the middle of the distillation tower 1; Step 3, opening one or more air inlets from top to bottom through the air intake control component; Step 4: Control part of the steam to enter the corresponding closed chamber 151 from top to bottom through the heating steam pipe 4 for temperature compensation.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An acetic acid distillation energy-saving device based on energy integration, comprising a distillation tower (1), an evaporator (2) located at the bottom of the distillation tower (1), and a condenser (3) located at the top of the distillation tower (1), wherein the distillation tower (1) is provided with a plurality of trays (12), wherein the trays (12) gradually become longer from top to bottom, and the trays (12) are provided with air flow holes for steam to pass through, and a steam inlet is provided at the bottom of the distillation tower (1), characterized in that: The side wall of the distillation tower (1) is a cavity structure. A vertical heating steam pipe (4) is arranged on one side of the cavity structure, and a vertical reflux steam pipe (5) is arranged on the other side. A plurality of sealing partitions (15) are arranged in the cavity structure. The sealing partitions (15) divide the cavity structure into a plurality of sealed chambers (151). Each of the sealing partitions (15) is located between two adjacent tower plates (12) so that each sealed chamber (151) faces one of the tower plates (12). ), the heating steam pipe (4) and the reflux steam pipe (5) both pass through each closed chamber (151), an air inlet is provided in the heating steam pipe (4) corresponding to each tower plate (12), and an air outlet is provided in the reflux steam pipe (5) corresponding to each tower plate (12); an air inlet control component for controlling the opening or closing of the air inlet is provided at the air inlet, and an air outlet control component for controlling the opening or closing of the air outlet is provided at the air outlet; the air inlet control component includes a control element provided in the cavity structure corresponding to the air inlet; A first rubber abutment block (41) is provided at the position of the air inlet, an air inlet baffle (42) is provided between the first rubber abutment block (41) and the air inlet of the heating steam pipe (4), and when the first rubber abutment block (41) is at room temperature, the air inlet baffle (42) is tightly abutted against the air inlet of the heating steam pipe (4) under the action of the first rubber abutment block (41); the air outlet control component comprises a second rubber abutment block (42) provided at a position corresponding to the air outlet in the cavity structure The invention relates to a heat inlet baffle (42) and a heat inlet baffle (51). An air outlet baffle (52) is arranged between the second rubber abutting block (51) and the air outlet of the reflux steam pipe (5). When the second rubber abutting block (51) is at room temperature, the air outlet baffle (52) tightly abuts against the air outlet of the reflux steam pipe (5). The air inlet baffle (42) is a heat-conducting baffle, the air outlet baffle (52) is a heat-insulating baffle, and a spring sheet (53) in a compressed state is arranged between the air outlet baffle (52) and the air outlet.

2. The acetic acid distillation energy-saving device based on energy integration according to claim 1, characterized in that: A flow diversion device is provided at a position of the air inlet baffle (42) corresponding to the air inlet of the heating steam pipe (4), and the flow diversion device includes a flow diversion block (43) fixedly connected to the air inlet baffle (42), and the flow diversion block (43) can divide the air flow to two sides. A collecting trough plate (44) is fixedly connected to the air inlet of the heating steam pipe (4), and the steam entering the air inlet is concentrated at the collecting trough plate (44) and then diverted to two sides through the flow diversion block (43).

3. The acetic acid distillation energy-saving device based on energy integration according to claim 1 is characterized in that: The heating steam pipe (4) and the return steam pipe (5) are both attached to the outer wall of the cavity structure, and gaps are left between the heating steam pipe (4) and the return steam pipe (5) and the inner wall of the cavity structure, and the air inlet and the air outlet are both facing the corresponding gaps.

4. The acetic acid distillation energy-saving device based on energy integration according to claim 1, characterized in that: A slot (13) is provided on the inner side wall of the distillation tower (1) at a position corresponding to the tower plate (12), the tower plate (12) is inserted into the slot (13), a rotating shaft (131) is provided in the slot (13), the tower plate (12) is rotatably connected to the rotating shaft (131), an upper limit block (133) for limiting the turning of the tower plate (12) is fixedly connected on the upper side of the slot (13) and corresponding to the inner side wall of the cavity structure of the distillation tower (1), and a locking assembly is provided between the tower plate (12) and the air inlet baffle (42).

5. The acetic acid distillation energy-saving device based on energy integration according to claim 4 is characterized in that: A notch is provided on the upper side of the air intake baffle (42), and the locking assembly comprises an L-shaped locking plate (45). The L-shaped locking plate (45) is fixedly connected to the tower plate (12), and when the tower plate (12) is in a balanced state, the L-shaped locking plate (45) is inserted into the notch to close the air intake.

6. The acetic acid distillation energy-saving device based on energy integration according to claim 1, characterized in that: A plurality of groups of drainage lines (134) are provided between adjacent tower plates (12), one end of the drainage line (134) is fixedly connected to the outer end of one of the tower plates (12), and the other end is fixedly connected to the outer end of another tower plate (12), and the drainage line (134) is always in an inclined state.

7. The acetic acid distillation energy-saving device based on energy integration according to claim 1 is characterized in that: An energy recovery component (14) is arranged at the upper part of the distillation tower (1), and the energy recovery component (14) includes a solar power supply device and a wind power supply device. The air inlet of the heating steam pipe (4) is connected to a mixing heating box (141), and a heating component is arranged at the mixing heating box (141). A connecting pipeline is connected to the mixing heating box (141), and the connecting pipeline is connected to the air outlet of the evaporator (2).

8. The acetic acid distillation energy-saving device based on energy integration according to claim 1, characterized in that: The liquid inlet end of the evaporator (2) is connected to a liquid inlet pipe (21), the other end of the liquid inlet pipe (21) is connected to the bottom of the distillation tower (1), and the gas outlet of the evaporator (2) is connected to the steam inlet of the distillation tower (1).

9. An acetic acid distillation energy-saving method based on energy integration, characterized in that: include: Step 1, controlling the evaporator (2) to open so that steam enters the distillation tower (1) through the steam inlet; Step 2, the liquid to be distilled is introduced into the distillation tower (1) from the feed inlet in the middle of the distillation tower (1); Step 3, opening one or more air inlets from top to bottom through the air intake control component; Step 4: Control a portion of the steam to enter the corresponding closed chamber (151) from top to bottom through the heating steam pipe (4) for temperature compensation.

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