Energy-saving device and method for acetic acid rectification based on energy integration

Abstract

The application relates to an energy-saving device for acetic acid rectification based on energy integration, which comprises a rectification tower, an evaporator located at the lower part of the rectification tower and a condenser located at the top of the rectification tower, the rectification tower is internally provided with multiple tower plates, the tower plates gradually become longer from top to bottom, gas flow holes for steam passing through are formed in the tower plates, the side wall of the rectification tower is a cavity structure, a vertical heat supply steam pipe is arranged on one side in the cavity structure, and a vertical reflux steam pipe is arranged on the other side, multiple sealed partitions are arranged in the cavity structure, the sealed partitions divide the cavity structure into multiple sealed chambers, each sealed partition is located between two adjacent tower plates so that each sealed chamber is opposite to a tower plate, the heat supply steam pipe and the reflux steam pipe both pass through each sealed chamber, an air inlet is formed in the heat supply steam pipe and corresponds to the position of each tower plate, and an air inlet control assembly for controlling the opening and closing of the air inlet is arranged at the air inlet. The application has the technical effect of energy saving and efficiency increasing.

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. While it has many advantages, it also represents a high energy consumption and investment component of industrial processes. In industries like chemical processing, it accounts for over half of the total energy consumption. Therefore, novel tower designs can improve the thermodynamic efficiency of distillation towers and reduce energy consumption. The most representative example is the dividing wall tower, which incorporates a vertical partition within the distillation tower, dividing it into four main sections: the top section, the bottom section, the feed section, and the intermediate side product extraction section, separated by the partition. Generally speaking, separating a ternary mixture using a conventional distillation tower requires two sequential towers to obtain the three pure components. However, a dividing wall tower requires only a single tower to simultaneously obtain all components and achieve the desired precision separation requirements. Compared to the traditional two-column process, this can achieve energy savings of 30-60%, equipment investment savings of approximately 30%, and increased 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 liquid condensed by the condenser is injected 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 flowing 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] Regarding 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 solutions:

[0007] The condenser is a device for cooling the steam in the tank, and the condenser is a device for cooling the steam in the tank, wherein the condenser has a bottom end and a bottom end. The condenser has a bottom end and a bottom end. The condenser has a bottom end and a bottom end. The condenser has a bottom end and a bottom end. and a tube connecting the discharging opening of the gasket and the gas supply pipe, wherein the tube has a check valve in its outlet and a check valve in its outlet, and the tube has a check valve in its outlet, and the check valve is closed.

[0008] By adopting the above technical solution, the heating steam pipe is arranged in the cavity structure and passes 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. 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. The first rubber resistance block has a higher hardness under low temperature conditions, so when temperature compensation is not required, the hardness of the first rubber resistance block is used to control the corresponding air inlet baffle to resist at the air inlet of the corresponding heating steam pipe. 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 then transferred to the corresponding first rubber resistance block. The rubber resistance block softens when absorbing heat, causing the air inlet baffle to separate from the corresponding air inlet, allowing steam to enter the corresponding closed chamber, and then supplementing the heating of the distillation tower corresponding to the area. When the corresponding closed chamber is in a high temperature state, the second rubber resistance block deforms, causing the air outlet baffle to separate from the air outlet under the action of the spring, 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, thereby improving the distillation effect. By adopting the above technical solution, multiple closed chambers are set in the cavity structure of the distillation tower during use.

[0009] 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.

[0010] By adopting the above technical solution, due to the provision of a collecting trough plate, the airflow can be blown onto the diverter block according to a predetermined trajectory, and then diverted to both sides through the diverter block, further allowing steam to quickly fill the entire closed chamber, thereby improving the heating efficiency.

[0011] Preferably, the heating steam pipe and the return steam pipe are both attached to the outer wall of the cavity structure, and there are gaps 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.

[0012] 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 quickly fill the entire closed cavity from both sides.

[0013] Preferably, a slot is provided on the inner side wall of the distillation tower corresponding to the position of the tower plate, the tower plate is inserted into 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 to the upper side of the slot and corresponding to the inner side wall of the distillation tower cavity structure, and a locking assembly is provided between the tower plate and the air inlet baffle.

[0014] By adopting the above technical solution, the tower plate is inserted into the slot, and a rotating shaft is provided 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 facilitates temperature compensation and has a good energy-saving effect.

[0015] 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.

[0016] 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 it from the air intake baffle. At this time, due to the thermal conductivity of the air intake baffle, 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.

[0017] Preferably, a plurality of drainage lines are provided between adjacent tower plates, one end of the 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 the other tower plate, and the drainage line is always in an inclined state.

[0018] 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 likely to splash when falling into the lower tower plate. This method can reduce the possibility of liquid splashing directly to the bottom of the tower.

[0019] Preferably, an energy recovery component is provided on the upper part of the distillation tower, and the energy recovery component includes a solar power supply device and a wind power supply device. The air inlet of the heating steam pipe is connected to a mixing heating box, 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] This application provides an energy-saving method for acetic acid distillation based on energy integration, which adopts the following technical solutions:

[0024] An energy-saving method for acetic acid distillation based on energy integration, comprising:

[0025] Step 1: Control the evaporator to open so that steam enters the distillation tower through the steam inlet;

[0026] Step 2: The liquid to be distilled is fed into the distillation tower from the feed port in the middle of the distillation tower;

[0027] Step 3: Open one or more air inlets from top to bottom through the air intake control component;

[0028] 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.

[0029] By adopting the above technical solution, during use, multiple closed chambers are set in the cavity structure of the distillation tower, and the heating steam pipe is set 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 control which closed chamber the air enters, thereby conveniently performing temperature compensation on the entire distillation tower.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. During use, multiple closed chambers are set in the cavity structure of the distillation tower. The heating steam pipe is set 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 control which closed chamber the air enters, thereby conveniently performing temperature compensation on the entire distillation tower.

[0032] 2. The first rubber abutment has a high hardness at low temperatures. Therefore, when temperature compensation is not required, the rigidity of the first rubber abutment allows the corresponding air inlet baffle to contact the corresponding air inlet of the heating steam pipe. When air in the heating steam pipe passes through the corresponding chamber, the heat-conducting baffle in each chamber absorbs heat, which is then transferred to the corresponding first rubber abutment. The first rubber abutment softens upon absorbing the heat, causing the air inlet baffle to detach from the corresponding air inlet, allowing steam to enter the corresponding sealed chamber and thereby provide additional heating for the distillation tower in that area. When the corresponding sealed chamber reaches a high temperature, the second rubber abutment deforms, causing the air outlet baffle to detach from the outlet under the action of the spring, allowing steam to enter the reflux steam pipe through the outlet for reuse. Since the heating steam pipe is heated from top to bottom, while the distillation tower is heated from bottom to top, the temperature of the airflow in the distillation tower is effectively equalized, thereby improving the distillation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 1 is a schematic diagram of the overall structure of the embodiment;

[0034] Figure 2 It is a schematic diagram highlighting the location of the return steam pipe and the heating steam pipe;

[0035] Figure 3 It is a schematic diagram of the structure highlighting energy-saving heating in the embodiment;

[0036] Figure 4 Schematic diagram highlighting the connection structure of the diverter block in the embodiment.

[0037] Explanation of the accompanying symbols: 1. Distillation tower; 11. Feed pipe; 12. Tower plate; 13. Slot; 131. Rotating shaft; 132. Sealing strip; 133. Upper limit block; 134. Drain line; 14. Energy recovery component; 141. Mixing and 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 lock plate; 5. Reflux steam pipe; 51. Second rubber resistance block; 52. Air outlet baffle; 53. Shrapnel. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-4 This application is described in further detail.

[0039] 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 be heated by steam to form steam. 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 provided at the middle position of the top of the distillation tower 1, and a reflux port 31 is provided 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 to facilitate the outflow of the distilled liquid.

[0040] The distillation tower 1 is provided with a plurality of trays 12 inside. The trays 12 gradually become longer from top to bottom. An air flow hole for steam to pass through is provided on each tray 12. 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; so that the slot 13 is in a sealed state. The presence of 132 allows the tower plate 12 to rotate freely; an upper limit block 133 is fixedly connected to the inner side wall of the cavity structure to limit the flipping of the tower plate 12, 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.

[0041] Reference Figure 2 and Figure 3A vertical heating steam pipe 4 is provided on one side of the cavity structure, and a vertical reflux steam pipe 5 is provided 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 provided 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 provided 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 provided on the connecting pipeline.

[0042] 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.

[0043] An air inlet control component is provided at the air inlet to control its opening or closing, and an air outlet control component is provided at the air outlet to control its opening or closing.

[0044] Among them, the air intake control component includes a first rubber resistance block 41 arranged at a position corresponding to the air inlet in the cavity structure, and an air intake baffle 42 is arranged between the first rubber resistance 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 resistance 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 resistance block 51 arranged at a position corresponding to the air outlet in the cavity structure, and an air outlet baffle 52 is arranged between the second rubber resistance block 51 and the air inlet of the return steam pipe 5, and the air outlet baffle 52 is a heat-insulating baffle, and a spring piece 53 in a compressed state is arranged between the air outlet baffle 52 and the air outlet; when the second rubber resistance block 51 is in a natural state, the air outlet baffle 52 tightly contacts the air outlet of the return steam pipe 5; a diversion device is provided at the position of the air intake baffle 42 corresponding to the air inlet of the heating steam pipe 4.

[0045] Reference Figure 3 and Figure 4The diversion device includes a diversion block 43 fixedly connected to the air inlet baffle 42. 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.

[0046] 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 set downward. In the 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 to close the air inlet of the heating steam pipe 4.

[0047] The working principle of an acetic acid distillation energy-saving device based on energy integration in this application is:

[0048] When the liquid to be distilled is subjected to distillation treatment, it is preferred to add the liquid to be distilled to the feed port at the middle position of the distillation tower 1, and at the same time inject steam 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 steam outlet at the upper part 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 treatment. 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, causing the L-shaped lock plate 45 to disengage from the groove. During the above operation, 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 disengaged from the notch, the first rubber resistance block 41 is deformed by heat, and the steam enters the closed chamber 151 corresponding to the rotating tray 12 through the heating steam pipe 4, compensating for the heating of the distillation tower 1 at this position. Only when the liquid flows onto the corresponding tray 12, causing the tray 12 to tilt, will the closed chamber 151 at the corresponding position be opened, so that resources can be effectively saved.

[0049] 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:

[0050] Step 1: Control the evaporator 2 to open so that steam enters the distillation tower 1 through the steam inlet;

[0051] Step 2: The liquid to be distilled is fed into the distillation tower 1 from the feed port in the middle of the distillation tower 1;

[0052] Step 3: Open one or more air inlets from top to bottom through the air intake control component;

[0053] 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.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection 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), the trays (12) gradually becoming longer from top to bottom, the trays (12) being provided with air flow holes for steam to pass through, and a steam inlet being 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 provided on one side of the cavity structure, and a vertical reflux steam pipe (5) is provided on the other side. A multi-layer sealing partition (15) is provided in the cavity structure. The sealing partition (15) divides 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 sealed chamber (151). An air inlet is provided in the heating steam pipe (4) at a position corresponding to each tower plate (12). 5) is provided with an air outlet at a position 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 first rubber contact block (41) provided at a position corresponding to the air inlet in the cavity structure, an air inlet baffle (42) is provided between the first rubber contact block (41) and the air inlet of the heating steam pipe (4), and when the first rubber contact block (41) is at room temperature, the air inlet baffle (42) is tightly contacted with the air inlet of the heating steam pipe (4) under the action of the first rubber contact block (41); the air outlet control component includes a first rubber contact block (41) provided at the position corresponding to the air inlet of the heating steam pipe (4) A second rubber abutment block (51) is provided at a position corresponding to the air outlet in the cavity structure, and an air outlet baffle (52) is provided between the second rubber abutment block (51) and the air outlet of the reflux steam pipe (5). When the second rubber abutment 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 piece (53) in a compressed state is provided between the air outlet baffle (52) and the air outlet; a slot (13) is provided on the inner side wall of the distillation tower (1) corresponding to the position of the tower plate (12), and the tower plate (12) is inserted into the slot (13). 3), 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 flipping of the tower plate (12) is fixedly connected on the inner side wall of the cavity structure of the distillation tower (1) on the upper side of the slot (13), and 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), and the locking assembly includes 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 inlet.

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

3. The acetic acid distillation energy-saving device based on energy integration according to claim 1, 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 oriented towards the corresponding gaps.

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

5. The acetic acid distillation energy-saving device based on energy integration according to claim 1, characterized in that: An energy recovery component (14) is provided on the upper portion 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 provided 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).

6. 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).

7. An energy-saving method for acetic acid distillation based on energy integration, using the energy-saving device for acetic acid distillation based on energy integration according to any one of claims 1 to 6 to perform energy saving in acetic acid distillation, characterized in that: include: Step 1: Control the evaporator (2) to open so that steam enters the distillation tower (1) through the steam inlet; Step 2: Allow the liquid to be distilled to enter the distillation tower (1) from the feed port in the middle of the distillation tower (1); Step 3: Open one or more air inlets from top to bottom through the air inlet 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.

Images