Glycerol distillation device with heat energy recycling

Abstract

The present application relates to the technical field of glycerol distillation, in particular to a glycerol distillation device with heat energy recycling. It comprises a distillation column, a condenser, a reflux tank and a compression mechanism connected with the reflux tank, wherein: one side of the distillation column is connected with a feeding pipe, the top is connected with a steam exhaust pipe connected with the condenser; and one side of the distillation column is connected with a reboiler; the condenser has a normal refrigeration temperature and an energy-saving refrigeration temperature. In the glycerol distillation device with heat energy recycling, a part of liquid phase is guided into the distillation column, then cooperates with the gas phase that is not condensed by the condenser, the gas phase that is not condensed by the condenser is pressurized, then the gas phase in the distillation column is guided to the liquid phase, the liquid phase is scattered by the fan, the gas phase and the liquid phase are uniformly contacted, so that the gas phase is guided into the distillation column, the efficient separation of glycerol is realized, and the product quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of glycerol distillation, in particular to a glycerol distillation device capable of recovering and reusing heat energy. Background Art

[0002] Glycerin is a colorless, odorless, sweet, clear thick liquid. Its chemical name is "propylene glycol". Glycerin is usually extracted from oils. Glycerin has strong hygroscopicity. Pure glycerin can absorb 40% water, so it can form a thin film when applied to the skin, which can isolate the air and prevent water evaporation. It can also absorb moisture in the air. Therefore, people often use glycerin on the hands, face and other skin surfaces exposed to the air in winter. Therefore, it has wide practicality.

[0003] Glycerol distillation is a process of vaporizing and condensing crude glycerol through a distillation device to obtain refined glycerol.

[0004] In recent years, high electricity demand in the summer has led to a reduction in coal production capacity, which in turn has affected power production. As temperatures rise, residential electricity demand also increases, especially in the summer and winter. The use of air conditioning and heating further increases electricity demand, which in turn affects the supply of industrial electricity, resulting in power restrictions in some factories.

[0005] To reduce electricity consumption within the factory, some factories will reduce the power of some electrical equipment in the distillation unit when the demand for glycerin production decreases. For example, the condenser's cooling temperature is increased. However, when the condenser's cooling temperature is increased, due to insufficient cooling capacity, some of the steam (i.e., gas phase) discharged from the distillation tower is difficult to condense into liquid (i.e., liquid phase), resulting in the steam being discharged to the outside. Summary of the Invention

[0006] The object of the present invention is to provide a glycerol distillation device with heat recovery and reuse, so as to solve the problems raised in the above background technology.

[0007] To achieve the above object, a glycerol distillation device with heat energy recovery and reuse is provided, comprising a distillation tower, a condenser, a reflux tank, and a compression mechanism connected to the reflux tank, wherein:

[0008] One side of the distillation tower is connected to a feed pipe, and the top is connected to a steam exhaust pipe connected to a condenser; and one side of the distillation tower is connected to a reboiler;

[0009] The condenser has a normal refrigeration temperature and an energy-saving refrigeration temperature. At the normal refrigeration temperature, the condenser condenses all the gas phase in the steam exhaust pipe into a liquid phase; at the energy-saving refrigeration temperature, the condenser condenses part of the gas phase in the steam exhaust pipe into a liquid phase, so that the liquid phase and gas phase coexist in the steam exhaust pipe; the reflux tank is connected to the steam exhaust pipe and is used to receive the gas phase and liquid phase transported from the steam exhaust pipe; the reflux tank is provided with a reflux pipe having one end penetrating into the interior of the distillation tower, so as to guide the liquid phase in the reflux tank into the distillation tower;

[0010] A spoiler is rotatably provided inside the distillation tower below the reflux pipe, forming a reaction chamber between the outside of the spoiler and the inside of the distillation tower. The spoiler rotates by utilizing the pressure of the gas phase inside the distillation tower, and disperses the liquid phase discharged through the reflux pipe into the reaction chamber during the rotation process.

[0011] One end of the compression mechanism is connected to the reflux tank, and the other end is connected to the reaction chamber. The compression mechanism is used to pressurize the gas phase in the reflux tank and then spray it into the reaction chamber, so that a low pressure is generated in the reaction chamber, so as to guide the liquid phase in the distillation tower to the reaction chamber, and uniformly contact the liquid phase dispersed in the reaction chamber, so that the light components in the liquid phase are transferred to the gas phase, and the heavy components in the gas phase are transferred to the liquid phase.

[0012] As a further improvement of the present technical solution, the compression mechanism is connected to the spoiler and is used to pressurize the gas phase in the reflux tank by rotating the spoiler.

[0013] As a further improvement of the present technical solution, the condenser includes a condensation tank having a water inlet pipe connected to the top and a return pipe connected to the bottom. The bottom end of the return pipe is connected to a refrigerator, and one end of the water inlet pipe is connected to the refrigerator through a water pump; one end of the steam exhaust pipe passes through the condensation tank and then passes through the bottom of the condensation tank.

[0014] As a further improvement of the present technical solution, one end of the steam exhaust pipe passing through the condensing tank is connected to the interior of the reflux tank; the reflux pipe is connected to the bottom of the reflux tank;

[0015] The bottom of the reflux tank is also connected to a discharge pipe, and one end of the middle of the reflux tank is connected to a steam conduit, wherein valves for regulating flow are provided in the reflux pipe and the discharge pipe.

[0016] As a further improvement of the present technical solution, the spoiler is a blade fan with a driving shaft coaxially fixedly connected to the bottom end, and the driving shaft is rotatably connected to a bracket fixedly installed inside the distillation tower.

[0017] As a further improvement of the present technical solution, the length of the reflux pipe penetrating into the distillation tower is greater than the length between the outer ring of the impeller and the inner ring of the distillation tower.

[0018] As a further improvement of the present technical solution, the compression mechanism includes a boosting part and a conveying part, wherein the conveying part includes an air delivery pipe, one end of the air delivery pipe penetrates into the interior of the distillation tower and is connected to an air distribution pipe; the air distribution pipe is fixedly installed on the side wall of the distillation tower; the air distribution pipe is an annular structure, and at the same time, the top of the air distribution pipe is connected to a gas nozzle located below the reaction chamber.

[0019] As a further improvement of the present technical solution, the pressurizing unit includes a driven shaft and a shell having a heat exchange chamber therein and an opening at one end; the open end of the shell is fixedly mounted on the outer wall of the distillation tower; the heat exchange chamber is connected to one end of the steam conduit so that the gas phase in the steam conduit enters the heat exchange chamber;

[0020] A partition is fixedly provided inside the heat exchange cavity, and the partition separates the end of the shell away from the opening into a compression cavity with a supercharger provided inside;

[0021] One end of the driven shaft penetrates into the interior of the distillation tower and is connected to the driving shaft through a gear transmission, and the other end penetrates into the compression chamber and is rotatably connected to the partition; the side wall of the partition is provided with an air inlet hole connecting the heat exchange chamber and the compression chamber, and one end of the shell is provided with an exhaust hole connected to the compression chamber, and the exhaust hole is connected to the air supply pipe.

[0022] As a further improvement of the present technical solution, the supercharging member includes a rotating disk coaxially connected to the driven shaft, the rotating disk being eccentrically arranged in the compression chamber; the outer ring of the rotating disk is provided with a plurality of grooves recessed toward the center of the circle, a slide is slidably arranged in the groove, and a return spring is provided between the end of the slide and the inner end of the groove to elastically connect the two;

[0023] The exhaust hole is located near the outer ring of the turntable and the gas pipe, and the air inlet hole is located far away from the outer ring of the turntable and the gas pipe.

[0024] As a further improvement of the present technical solution, a heat collecting chamber is provided between the outer ring and the inner ring of the shell; the return water pipe includes an upper pipe and a lower pipe, one end of the upper pipe is connected to the condensation tank, and the other end is connected to the top of the heat collecting chamber; one end of the lower pipe is connected to the bottom of the heat collecting chamber, and the other end is connected to the refrigerator.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the glycerin distillation device with heat energy recovery and reuse, a portion of the liquid phase is guided into the distillation tower and then combined with the gas phase that has not been condensed in the condenser. After the gas phase that has not been condensed in the condenser is pressurized, the gas phase inside the distillation tower is guided to the liquid phase. The liquid phase is dispersed by a blade fan, so that the gas phase and liquid phase are in uniform contact, thereby achieving the gas phase being guided into the distillation tower, and also achieving efficient separation of glycerin, thereby improving product quality.

[0027] 2. In the glycerin distillation device with heat energy recovery and reuse, when the condenser is at the energy-saving refrigeration temperature, the water in the condenser will heat up after heat exchange with the gas phase in the water inlet pipe. By guiding the heated water in the return pipe into the steam conduit, the gas phase in the heat exchange chamber is kept warm, thereby reducing the phenomenon of gas phase condensing into liquid phase and realizing the recovery and reuse of heat energy.

[0028] 3. In the glycerol distillation device with heat energy recovery and reuse, the impeller can not only disperse the reflux liquid phase to various parts of the reaction chamber, but also drive the supercharging part to work through the driven shaft, so that the supercharging part does not need additional power to drive, thereby avoiding the consumption of electricity resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the blade fan of the present invention;

[0031] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at A;

[0032] Figure 4 It is a structural schematic diagram of the reflux tank of the present invention;

[0033] Figure 5 The cross-sectional structure of the housing of the present invention is shown in FIG. Figure 1 ;

[0034] Figure 6 The cross-sectional structure of the housing of the present invention is shown in FIG. Figure 2 ;

[0035] Figure 7 It is a structural schematic diagram of the turntable of the present invention;

[0036] Figure 8 The structure of the shaft tube of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at B;

[0038] Figure 10 The structure of the shaft tube of the present invention is shown in FIG. Figure 2 ;

[0039] Figure 11 Schematic diagram of the reflux state of the gas phase of the present invention.

[0040] The meaning of each number in the figure is:

[0041] 100, distillation tower; 101, feed pipe; 102, steam exhaust pipe; 103, reboiler; 110, condenser; 111, water inlet pipe; 112, return pipe; 113, refrigerator; 120, reflux tank; 121, reflux pipe; 122, discharge pipe; 123, steam conduit; 124, reaction chamber; 130, compression mechanism; 131, shell; 132, heat exchange chamber; 13 3. Heat collecting chamber; 134. Partition; 135. Compression chamber; 136. Air inlet; 137. Exhaust hole; 138. Turntable; 139. Slide plate; 140. Blade fan; 141. Driving shaft; 142. Bracket; 143. Driven shaft; 150. Air pipe; 151. Air distribution pipe; 152. Air nozzle; 160. Shaft tube; 161. Convex ring; 162. Paddle plate; 163. Driving part. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0045] In this invention, glycerol vapor is referred to as gas phase and condensed liquid is referred to as liquid phase. Figure 1 and Figure 2 As shown, a glycerol distillation device with heat recovery and reuse is provided, comprising a distillation tower 100, a condenser, a reflux tank 120, and a compression mechanism 130 connected to the reflux tank 120, wherein:

[0046] One side of the distillation column 100 is communicated with a feed pipe 101 for conveying the product to be distilled (i.e. glycerol) into the distillation column 100, and the top is communicated with a steam discharge pipe 102 connected with a condenser; and one side of the distillation column 100 is communicated with a reboiler 103, which is the same as the existing structure and is mainly used for heating the distillation column 100 to make the product inside the distillation column 100 vaporize.

[0047] The condenser has a normal refrigeration temperature and an energy-saving refrigeration temperature. At the normal refrigeration temperature, the condenser condenses all the gas phase in the steam discharge pipe 102 into liquid phase; at the energy-saving refrigeration temperature, the condenser condenses part of the gas phase in the steam discharge pipe 102 into liquid phase, so that the liquid phase and the gas phase exist in the steam discharge pipe 102 at the same time.

[0048] The reflux tank 120 is communicated with the steam discharge pipe 102 for receiving the gas phase and the liquid phase conveyed in the steam discharge pipe 102; the reflux tank 120 is provided with a reflux pipe 121 penetrating into the inside of the distillation column 100 to guide the liquid phase in the reflux tank 120 into the distillation column 100.

[0049] A turbulence member is rotatably arranged below the reflux pipe 121 in the inside of the distillation column 100, and a reaction cavity 124 is formed between the outside of the turbulence member and the inside of the distillation column 100; the turbulence member rotates by the pressure of the gas phase in the inside of the distillation column 100, and disperses the liquid phase discharged through the reflux pipe 121 to the reaction cavity 124 during the rotation.

[0050] One end of the compression mechanism 130 is communicated with the reflux tank 120, and the other end is communicated to the reaction cavity 124 for injecting the gas phase in the reflux tank 120 into the reaction cavity 124 after being pressurized, so as to generate low pressure in the reaction cavity 124 to guide the liquid phase in the distillation column 100 to the reaction cavity 124, and make the liquid phase uniformly contact with the dispersed liquid phase in the reaction cavity 124, so that the light components (low-boiling substances) in the liquid phase are transferred to the gas phase, and the heavy components (high-boiling substances) in the gas phase are transferred to the liquid phase.

[0051] The normal refrigeration temperature of the condenser refers to a temperature much lower than the boiling point of glycerol, for example, the boiling point of glycerol is 290 degrees. The normal refrigeration temperature can be set below 100 degrees, so that the gas phase is condensed into liquid phase due to the normal refrigeration temperature being much lower than the boiling point of glycerol; and the energy-saving refrigeration temperature is set to be above 200 degrees, so that the energy-saving refrigeration temperature begins to rise after part of the gas phase exchanges heat with the condenser, thereby making it difficult to condense part of the gas phase, so that the gas phase and the liquid phase exist at the same time.

[0052] In addition, the specific temperature of the normal refrigeration temperature and the energy-saving refrigeration temperature needs to be set according to the actual situation, for example, the flow speed of the gas phase, the pipe diameter of the steam discharge pipe 102 and the like will all affect the setting of the temperature.

[0053] That is, by guiding a portion of the liquid phase into the distillation tower 100 and then cooperating with the gas phase that has not been condensed in the condensation tank 110, the gas phase that has not been condensed in the condensation tank 110 is pressurized, and the gas phase inside the distillation tower 100 is guided to the liquid phase, and the liquid phase is broken up by the impeller 140 to achieve uniform contact between the gas phase and the liquid phase, thereby achieving the goal of guiding the gas phase into the distillation tower 100, and also achieving efficient separation of glycerin, thereby improving product quality.

[0054] Furthermore, in the above description, the compression mechanism 130 is connected to the spoiler, and is used to pressurize the gas phase in the reflux tank 120 through the rotation of the spoiler.

[0055] like Figure 1 As shown, the condenser includes a condenser tank 110 with a water inlet pipe 111 at the top and a water return pipe 112 at the bottom. The bottom end of the return pipe 112 is connected to a refrigerator 113. One end of the water inlet pipe 111 is connected to the refrigerator 113 via a water pump. Simultaneously, one end of the steam exhaust pipe 102 passes through the condenser tank 110 and then exits from the bottom of the condenser tank 110. In this way, the water pump pumps the cold water in the refrigerator 113 into the water inlet pipe 111. The water in the water inlet pipe 111 enters the condenser tank 110, exchanges heat with the steam exhaust pipe 102, and forms hot water. The hot water is then discharged into the refrigerator 113 through the return pipe 112 for cooling, thus completing the circulation.

[0056] like Figure 4 As shown, one end of the steam exhaust pipe 102, which passes through the condenser 110, is connected to the interior of the reflux tank 120. The reflux pipe 121 is connected to the bottom of the reflux tank 120, and the bottom of the reflux tank 120 is also connected to the discharge pipe 122. The middle end of the reflux tank 120 is connected to the steam conduit 123. Both the reflux pipe 121 and the discharge pipe 122 are equipped with flow regulating valves. Thus, when the condenser is at the energy-saving cooling temperature, both the gas phase and the liquid phase will coexist in the steam exhaust pipe 102. Both the gas phase and the liquid phase will flow into the reflux tank 120, and the liquid phase will be discharged through the reflux pipe 121 and the discharge pipe 122, while the gas phase will be discharged through the steam conduit 123. Furthermore, the liquid phase discharged through the discharge pipe 122 can be directly collected. The valve is used to achieve the distribution of the liquid phase. For example, when more liquid phase needs to be refluxed into the distillation tower 100 , the flow rate in the reflux pipe 121 can be increased and the flow rate in the discharge pipe 122 can be reduced through the valve.

[0057] like Figure 2 As shown, the spoiler is a blade fan 140 with a driving shaft 141 coaxially fixedly connected to the bottom end. The driving shaft 141 is rotatably connected to a bracket 142 fixedly installed inside the distillation tower 100. The bracket 142 is preferably an "I" or "X" shaped structure, which can reduce the impact of the rising gas phase in the distillation tower 100.

[0058] exist Figure 2 In the embodiment, the length L1 of the reflux pipe 121 penetrating into the distillation column 100 is greater than the length L2 between the outer ring of the impeller 140 and the inner ring of the distillation column 100. Thus, the liquid phase discharged through the reflux pipe 121 falls on the top of the impeller 140. The rotation of the impeller 140 then disperses the refluxed liquid phase to various locations in the reaction chamber 124.

[0059] like Figure 3 and Figure 4 As shown, the compression mechanism 130 includes a pressurizing part and a conveying part, wherein the conveying part includes an air delivery pipe 150, one end of the air delivery pipe 150 penetrates into the interior of the distillation tower 100 and is connected to an air distribution pipe 151, and the air distribution pipe 151 is fixedly installed on the side wall of the distillation tower 100; the air distribution pipe 151 is an annular structure, and at the same time, the top is connected to a gas nozzle 152, and the gas nozzle 152 is located below the reaction chamber 124.

[0060] like Figure 2 、 Figure 5 、 Figure 6 as well as Figure 7 As shown, the pressurizing unit includes a driven shaft 143 and a housing 131 with an opening at one end and a heat exchange chamber 132 therein. The open end of housing 131 is fixedly mounted on the outer wall of distillation column 100. Heat exchange chamber 132 communicates with one end of steam conduit 123, allowing the gas phase within steam conduit 123 to enter heat exchange chamber 132. A partition 134 is fixedly mounted within heat exchange chamber 132, separating the end of housing 131 away from the opening into a compression chamber 135 containing a pressurizing element. One end of driven shaft 143 penetrates into distillation column 100 and is in driving connection with driving shaft 141. The other end penetrates into compression chamber 135 and is rotationally connected to partition 134. An air inlet 136 is provided on the side wall of the partition 134 to connect the heat exchange chamber 132 with the compression chamber 135 . An exhaust hole 137 is provided at one end of the shell 131 to connect with the compression chamber 135 . The exhaust hole 137 is connected to the air pipe 150 .

[0061] The connection between the driven shaft 143 and the driving shaft 141 is preferably a gear transmission, for example, Figure 2 As shown, a first bevel gear is provided at the bottom of the driving shaft 141 , and a first bevel gear meshing with the first bevel gear is provided at one end of the driven shaft 143 .

[0062] The supercharging element preferably adopts a rotary supercharging structure, such as a twin-screw supercharging, a turbocharger, etc. Figure 7 and Figure 8In the illustrated embodiment, the supercharger includes a rotating disk 138 coaxially connected to a driven shaft 143. Rotating disk 138 is eccentrically positioned within compression chamber 135, with one side of rotating disk 138 in contact with or close to one side of compression chamber 135. The outer ring of rotating disk 138 is provided with multiple grooves recessed toward the center of the circle. Slide plates 139 are slidably positioned within the grooves. A return spring is provided between the ends of slide plates 139 and the inner ends of the grooves, elastically connecting them. Exhaust holes 137 are located near the outer ring of rotating disk 138 and gas pipe 150, while inlet holes 136 are located away from the outer ring of rotating disk 138 and gas pipe 150.

[0063] In addition, in order to prevent the gas phase from cooling down before and during the pressurization process. Figure 1 and Figure 5 As shown, a heat collection chamber 133 is provided between the outer and inner rings of the housing 131. The return pipe 112 includes an upper pipe and a lower pipe. One end of the upper pipe is connected to the condenser tank 110, and the other end is connected to the top of the heat collection chamber 133. One end of the lower pipe is connected to the bottom of the heat collection chamber 133, and the other end is connected to the refrigerator 113. In this way, after the gas phase enters the heat exchange chamber 132, the hot water in the return pipe 112 flows into the heat collection chamber 133, keeping the gas phase in the heat exchange chamber 132 warm, thereby reducing the phenomenon of gas phase condensing into liquid phase.

[0064] It can be seen that when the condenser is at the energy-saving cooling temperature, the water in the condenser will heat up after exchanging heat with the gas phase in the water inlet pipe 111. By guiding the heated water in the return pipe 112 to the steam conduit 123, the gas phase in the heat exchange chamber 132 is kept warm, thereby reducing the phenomenon of gas phase condensing into liquid phase and realizing the recovery and reuse of heat energy.

[0065] Work away from:

[0066] Combine Figure 11 As shown,

[0067] Reboiler 103 heats distillation column 100, converting the mixture within distillation column 100 into a vapor phase. The vapor phase then passes through steam exhaust pipe 102 and condenser 110, exchanging heat with the cold water within condenser 110. At the energy-saving cooling temperature, a portion of the vapor phase within steam exhaust pipe 102 is liquefied, resulting in a coexistence of vapor and liquid phases within steam exhaust pipe 102. The water within condenser 110 also begins to heat up after this heat exchange, resulting in hot water entering return pipe 112.

[0068] The gas phase and liquid phase in the steam discharge pipe 102 flow into the reflux tank 120, and part of the liquid phase is discharged through the reflux pipe 121, and the other part of the liquid phase is refluxed into the distillation tower 100 through the reflux pipe 121. Then, the gas phase in the distillation tower 100 pushes the fan 140 to rotate in the upward process, and the rotation of the fan 140 scatters the liquid phase discharged through the reflux pipe 121 to the outer periphery (i.e. the reaction cavity 124).

[0069] The gas phase in the reflux tank 120 is discharged into the heat exchange cavity 132 through the steam guide pipe 123. In this process, the hot water in the backwater pipe 112 flows into the heat collection cavity 133, thereby achieving heat preservation of the gas phase in the heat exchange cavity 132. The gas phase in the heat exchange cavity 132 enters between the two sliding plates 139 through the gas inlet hole 136. When the fan 140 rotates, the fan 140 drives the driven shaft 143 to rotate through the driving shaft 141 and the two conical gears. The rotation of the driven shaft 143 drives the rotating disc 138 to rotate, and the rotation of the rotating disc 138 drives the sliding plate 139 to rotate. Since the rotating disc 138 is eccentrically arranged, the space between the two sliding plates 139 gradually decreases during rotation, thereby forcing the gas phase between the two sliding plates 139 to be compressed. When the compressed gas phase moves to the exhaust hole 137, the gas phase enters the gas conveying pipe 150 through the exhaust hole 137, and then flows into the gas distribution pipe 151 through the gas conveying pipe 150, and finally is sprayed out through the gas nozzle 152. Since the gas phase is pressurized, it will be quickly sprayed out through the gas nozzle 152. Under the action of the high-speed jet flow, a negative pressure is formed around the gas nozzle 152, thereby attracting the gas phase in the distillation tower 100 to the gas nozzle 152 and moving upward together with the sprayed gas phase. At this time, the upward moving gas phase contacts the refluxing liquid phase, and since the liquid phase is scattered by the fan 140, the gas phase and the liquid phase can be fully contacted. At this time, the light components (low-boiling substances) in the liquid phase are transferred to the gas phase, and the heavy components (high-boiling substances) in the gas phase are transferred to the liquid phase, thereby realizing efficient separation of glycerol.

[0070] It should be noted that the working principle of transferring the light components in the liquid phase to the gas phase and transferring the heavy components in the gas phase to the liquid phase is similar to that of the rectifying tower. For details, please refer to the working principle of the rectifying tower.

[0071] It can be found that the fan 140 not only scatters the refluxing liquid phase to each part of the reaction cavity 124, but also drives the booster through the driven shaft 143 to work, so that the booster does not need to be driven by additional power, thereby avoiding the consumption of electric power resources.

[0072] In addition, as Figures 8-10As shown, to achieve control of the compression element, a raised ring 161 is fixedly connected to the center of the rotating disk 138. One end of the raised ring 161 is rotatably arranged to penetrate the compression chamber 135, and the other end is rotatably arranged to penetrate the end of the housing 131. The inner ring of the raised ring 161 is provided with a plurality of first protrusions, and the outer ring of the shaft tube 160 is provided with a plurality of first sliding grooves. The shaft tube 160 slides into the raised ring 161. The inner ring of the shaft tube 160 at the end facing the driven shaft 143 is provided with a plurality of second protrusions, and the outer ring of the driven shaft 143 is provided with a plurality of second sliding grooves. The driven shaft 143 slides into the shaft tube 160. The end of the shaft tube 160 located outside the housing 131 is rotatably connected to a dial plate 162. A driving member 163, such as an electric push rod, is provided between the dial plate 162 and the housing 131.

[0073] Thus, when the condenser is at normal cooling temperature, the temperature is sufficiently low that no gas phase exists within the steam exhaust pipe 102. The electric push rod is then extended, causing it to drive the shaft tube 160 away from the housing 131 via the paddle 162. At this point, the shaft tube 160 moves away from the driven shaft 143. Consequently, the rotation of the driven shaft 143 is not transmitted to the rotary disk 138, and compression is no longer performed.

[0074] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A glycerol distillation device with heat energy recovery and reuse, comprising a distillation tower (100), a condenser, a reflux tank (120), and a compression mechanism (130) connected to the reflux tank (120), wherein: One side of the distillation tower (100) is connected to a feed pipe (101), and the top is connected to a steam exhaust pipe (102) connected to a condenser; and one side of the distillation tower (100) is connected to a reboiler (103); The condenser has a normal refrigeration temperature and an energy-saving refrigeration temperature. At the normal refrigeration temperature, the condenser condenses all the gas phase in the steam exhaust pipe (102) into a liquid phase; at the energy-saving refrigeration temperature, the condenser condenses part of the gas phase in the steam exhaust pipe (102) into a liquid phase, so that the liquid phase and the gas phase exist simultaneously in the steam exhaust pipe (102); the characteristics are: The reflux tank (120) is in communication with the steam exhaust pipe (102) and is used to receive the gas phase and liquid phase transported from the steam exhaust pipe (102); the reflux tank (120) is provided with a reflux pipe (121) having one end penetrating into the interior of the distillation tower (100) so as to guide the liquid phase in the reflux tank (120) into the distillation tower (100); A spoiler is rotatably provided inside the distillation tower (100) and below the reflux pipe (121); a reaction chamber (124) is formed between the outside of the spoiler and the inside of the distillation tower (100); the spoiler rotates by utilizing the pressure of the gas phase inside the distillation tower (100), and during the rotation process, disperses the liquid phase discharged through the reflux pipe (121) into the reaction chamber (124); One end of the compression mechanism (130) is connected to the reflux tank (120), and the other end is connected to the reaction chamber (124), and is used to pressurize the gas phase in the reflux tank (120) and then spray it into the reaction chamber (124), so that a low pressure is generated in the reaction chamber (124), so as to guide the liquid phase in the distillation tower (100) to the reaction chamber (124), and uniformly contact the liquid phase dispersed in the reaction chamber (124), so that the light components in the liquid phase are transferred to the gas phase, and the heavy components in the gas phase are transferred to the liquid phase; The spoiler is a blade fan (140) whose bottom end is coaxially fixedly connected to a driving shaft (141), and the driving shaft (141) is rotatably connected to a bracket (142) fixedly installed inside the distillation tower (100); The length of the reflux pipe (121) penetrating into the distillation tower (100) is greater than the length between the outer ring of the impeller (140) and the inner ring of the distillation tower (100).

2. The glycerol distillation device with heat recovery and reuse according to claim 1, characterized in that: The compression mechanism (130) is connected to the spoiler and is used to pressurize the gas phase in the reflux tank (120) through the rotation of the spoiler.

3. The glycerin distillation device with heat recovery and reuse according to claim 1, characterized in that: The condenser comprises a condensing tank (110) having a water inlet pipe (111) at the top and a water return pipe (112) at the bottom, the bottom end of the water return pipe (112) being connected to a refrigerator (113), and one end of the water inlet pipe (111) being connected to the refrigerator (113) via a water pump; one end of the steam exhaust pipe (102) penetrates into the condensing tank (110) and then exits from the bottom of the condensing tank (110).

4. The glycerol distillation device with heat recovery and reuse according to claim 3, characterized in that: One end of the steam exhaust pipe (102) passing through the condensation tank (110) is connected to the interior of the reflux tank (120); the reflux pipe (121) is connected to the bottom of the reflux tank (120); The bottom of the reflux tank (120) is also connected to a discharge pipe (122), and one end of the middle portion of the reflux tank (120) is connected to a steam conduit (123), wherein valves for regulating flow are provided in both the reflux pipe (121) and the discharge pipe (122).

5. The glycerin distillation device with heat recovery and reuse according to claim 3, characterized in that: The compression mechanism (130) includes a pressurizing portion and a conveying portion, wherein the conveying portion includes an air delivery pipe (150), one end of the air delivery pipe (150) penetrates into the interior of the distillation tower (100) and is connected to an air distribution pipe (151); the air distribution pipe (151) is fixedly installed on the side wall of the distillation tower (100); the air distribution pipe (151) is an annular structure, and at the same time, the top of the air distribution pipe (151) is connected to a gas nozzle (152) located below the reaction chamber (124).

6. The glycerin distillation device with heat recovery and reuse according to claim 5, characterized in that: The pressurizing section includes a driven shaft (143) and a shell (131) having a heat exchange chamber (132) inside and an opening at one end; the open end of the shell (131) is fixedly mounted on the outer wall of the distillation tower (100); the heat exchange chamber (132) is communicated with one end of the steam conduit (123) so that the gas phase in the steam conduit (123) enters the heat exchange chamber (132); A partition (134) is fixedly provided inside the heat exchange cavity (132), and the partition (134) separates the end of the shell (131) away from the opening into a compression cavity (135) with a pressurizing element provided inside. One end of the driven shaft (143) penetrates into the interior of the distillation tower (100) and is connected to the driving shaft (141) through a gear transmission, and the other end penetrates into the compression chamber (135) and is rotatably connected to the partition (134); the side wall of the partition (134) is provided with an air inlet (136) that connects the heat exchange chamber (132) and the compression chamber (135), and one end of the shell (131) is provided with an exhaust hole (137) that is connected to the compression chamber (135), and the exhaust hole (137) is connected to the air supply pipe (150).

7. The glycerol distillation device with heat recovery and reuse according to claim 6, characterized in that: The supercharging member includes a rotating disk (138) coaxially connected to the driven shaft (143), and the rotating disk (138) is eccentrically arranged in the compression chamber (135); the outer ring of the rotating disk (138) is provided with a plurality of grooves recessed toward the center of the circle, and a slide plate (139) is slidably arranged in the grooves, and a return spring is provided between the end of the slide plate (139) and the inner end of the groove to elastically connect the two; The exhaust hole (137) is located near the outer ring of the turntable (138) and the gas pipe (150), and the air inlet hole (136) is located away from the outer ring of the turntable (138) and the gas pipe (150).

8. The glycerin distillation device with heat recovery and reuse according to claim 6, characterized in that: A heat collecting chamber (133) is provided between the outer ring and the inner ring of the shell (131); the return pipe (112) comprises an upper pipe and a lower pipe, one end of the upper pipe is connected to the condensation tank (110), and the other end is connected to the top of the heat collecting chamber (133); one end of the lower pipe is connected to the bottom of the heat collecting chamber (133), and the other end is connected to the refrigerator (113).

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