Energy-saving condensing device for organic solvent recovery

Abstract

The invention relates to the technical field of organic solvent recovery, and discloses an energy-saving condensing device for organic solvent recovery, which comprises a condensing box, one side of the condensing box is fixedly provided with a pre-cooling box, the condensing box comprises a box body shell, the upper end of the box body shell is provided with a circulating pump, one side of the box body shell is provided with a plurality of groups of inclined grooves, and the inclined grooves are communicated with the pre-cooling box. An air inlet groove is formed in the upper end of the box shell, two sets of connecting shells are installed on the outer sides of condensation pipes, multiple sets of condensation pipes are rotatably installed between the two sets of connecting shells, cleaning assemblies are slidably arranged on the outer sides of the condensation pipes, and two sets of extrusion shells are symmetrically arranged on the outer sides of the condensation pipes; liquid beads on the surface of the condensation pipe are rapidly adsorbed, the liquid beads which are not adsorbed are difficult to escape due to the slow down of the airflow speed under the action of reverse convection and a baffle plate, and when the adsorption cotton moves to an extrusion groove of an extrusion shell, activated carbon fibers are pressed to discharge internal condensate water and are recycled to a precooling box for waste gas precooling.

Description

Technical Field

[0001] The present invention relates to the technical field of organic solvent recovery, in particular to an energy-saving condensing device for recovering organic solvents. Background Art

[0002] In modern industrial production, organic solvents are widely used in many fields such as chemical industry, pharmaceuticals, electronics, printing, etc. However, organic solvents are volatile and will be emitted into the air in large quantities during use, which not only causes serious waste of resources, but also poses a great threat to the environment and human health. Among the traditional methods of recovering organic solvents, condensation is a commonly used method. Its principle is to use low temperature to convert organic solvent vapor from gas to liquid, thereby achieving recovery. However, existing condensing devices generally have the problem of excessive energy consumption. On the one hand, in order to achieve a sufficiently low condensing temperature, the refrigeration system needs to consume a lot of electricity to compress the refrigerant and maintain a low temperature environment. On the other hand, the heat exchange efficiency of traditional condensing devices is low, and the heat transfer between the exhaust gas and the refrigerant is not sufficient, resulting in some organic solvent vapor not being effectively condensed and being discharged, which not only reduces the recovery efficiency, but also requires the uncondensed vapor to be processed by other subsequent processes, further increasing energy consumption.

[0003] For example, the existing Chinese patent with publication number CN214892679U discloses a vacuum spiral condenser, which uses a 60% by mass ethylene glycol aqueous solution as a coolant, which is injected into the cooling jacket from the coolant inlet and then into the cooling cavity from the top of the cooling cavity. The coolant temperature is -10°C, and the organic solvent gas enters from the inlet of the inner spiral condenser tube. After being cooled by the coolant, the organic solvent condensate is discharged from the inner spiral condenser tube outlet to a liquid storage tank along with the inner spiral condenser tube, and the liquid storage tank collects the condensate; the organic solvent gas then enters through the inlet of the outer spiral condenser tube located at the top of the liquid storage tank, and the outer spiral condenser tube is spirally arranged on the outer wall of the cooling cavity. The organic solvent gas in the tube is further cooled, and the condensate of the gas falls back to the liquid storage tank along the outer spiral condenser tube, and the purified gas is discharged from the outlet of the outer spiral condenser tube.

[0004] With respect to the above and existing related technologies, the inventors believe that the following defects often exist: 1. During the condensation process, half of the condensate droplets are in contact with the condenser tube and the other half is in contact with hot steam, which will cause uneven temperature distribution on the surface of the condenser tube, affecting the condensation effect. At the same time, this temperature difference may generate thermal stress inside the condenser tube. Especially under the condition of frequent alternating hot and cold working conditions, the repeated action of thermal stress can easily cause fatigue cracks in the condenser tube, reduce the structural strength of the equipment, and eventually cause equipment damage. 2. During the gas flow process, the liquid droplets produced by condensation will be discharged from the condensation box in the form of mist along with the fast-flowing gas, resulting in a decrease in condensation efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that in the prior art, during the gas flow process, liquid droplets generated by condensation will be discharged from the condensation box in the form of mist along with the rapidly flowing gas, resulting in a decrease in condensation efficiency. For this reason, we propose an energy-saving condensing device for organic solvent recovery.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: an energy-saving condensing device for recovering organic solvents, comprising a condensing box, a pre-cooling box fixedly installed on one side of the condensing box, the condensing box comprising a box shell, a circulating pump is provided at the upper end of the box shell, one end of the circulating pump is connected to the chiller through a connecting water pipe, and an exhaust port is provided on one side of the box shell. When the device is in use, the waste gas containing organic solvents is introduced into the interior of the pre-cooling box for pre-cooling treatment, preventing high-temperature waste gas from directly entering the condensing box, which will cause the equipment to undergo greater thermal shock. Long-term operation is prone to thermal stress, resulting in deformation and damage to the equipment. The waste gas that has undergone pre-cooling treatment flows into the upper end of the box shell for condensation treatment, and the high-temperature waste gas is condensed and then collected.

[0007] Preferably, a plurality of inclined slots are provided on one side of the box shell, which are connected to the pre-cooling box, a drainage slot is provided at the lower end of the box shell, a plurality of baffles are fixedly installed inside the exhaust port, and an air inlet slot is provided at the upper end of the box shell. In the process of the exhaust gas entering the box shell from the pre-cooling box, most of the exhaust gas flows into the interior of the box shell from the air inlet slot, and a small part of the exhaust gas is blown upward under the restriction of the inclined slot. This part of the upward-flowing exhaust gas forms a reverse convection with the exhaust gas that is moving downward and is about to be discharged from the exhaust port, slightly blocking the downward exhaust gas. According to actual measurements, the reverse convection structure extends the average residence time of the exhaust gas in the device from . seconds of the traditional device to . seconds, thereby lengthening the contact time of the exhaust gas with the condenser inside the box shell, thereby improving the condensation effect of the exhaust gas. A plurality of baffles are fixedly installed inside the exhaust port, and these baffles further disrupt the flow trajectory of the exhaust gas, making it impossible to discharge it quickly and in a straight line.

[0008] Preferably, the water outlet of the circulating pump is provided with a connecting water pipe 2, one end of which passes through the upper end of the box shell and is fixedly installed with a connecting shell, and the water inlet of the circulating pump is provided with a connecting water pipe 3, one end of which also passes through the upper end of the box shell and is fixedly installed with a connecting shell, and multiple groups of condensing tubes are rotatably installed between the two groups of connecting shells, and a cleaning component is slidingly provided on the outer side of the condensing tube. When the device has been used for a period of time, the condensate gradually condenses on the outer wall of the condensing tube, and half of the condensing liquid beads contact the condensing tube and the other half contact the hot exhaust gas, which will cause uneven local temperature distribution on the surface of the condensing tube. Repeated thermal stress can easily cause fatigue cracks in the condensing tube, reduce the structural strength of the equipment, and eventually cause damage to the equipment. At the same time, the condensing liquid beads are adsorbed on the outer wall of the condensing tube, which not only affects its condensation efficiency, but also, under the action of the continuously flowing exhaust gas, some of the liquid beads will be carried out of the box shell along with the gas flow, which greatly affects the recovery of the condensing liquid beads. At this time, the cleaning component is started to adsorb and collect the condensing liquid beads attached to the outer wall of the condensing tube, and preliminary filtration is performed to improve the recovery efficiency of the condensing liquid beads.

[0009] Preferably, the outer sides of multiple groups of condensers are provided with threaded grooves, which match the cleaning components. When the exhaust gas flows from the air inlet groove from top to bottom into the interior of the box shell, the upper part of the condenser is in contact with the exhaust gas for a long time, which can easily lead to uneven condensation of the condenser. By adsorbing and filtering the condensate on the outer wall of the condenser while the cleaning component drives the condenser to rotate slowly, the contact surface between the condenser and the exhaust gas is made more uniform, thereby improving the condensation efficiency of the condenser.

[0010] Preferably, two groups of extruded shells are symmetrically arranged on the outside of the condenser, and the extruded shells are rotatably connected to the condenser. A drainage hole is opened on one side of the two groups of extruded shells, and the drainage hole is connected to the connecting water pipe four. The lower ends of the two groups of connecting water pipes four are penetrated by a connecting water pipe five, which is connected to the pre-cooling box and the connecting water pipe five is connected to the drainage trough. An extrusion groove is opened at the upper end of the extruded shell.

[0011] Preferably, a connecting rod 1 is fixedly installed inside the two groups of connecting shells, and a stirring blade is fixedly installed on the outside of the connecting rod 1. During the rotation of the condenser, since the connecting rod 1 and the stirring blade outside it are fixed inside the two groups of connecting shells, the condensed liquid inside the condenser will rotate relative to each other during the rotation of the condenser, thereby improving the heat exchange efficiency of the liquid circulation during the condensation of the steam.

[0012] Preferably, the cleaning assembly includes a cylinder, the driving end of the cylinder is fixedly installed with connecting rod 2, one end of connecting rod 2 passes through one side of the box shell and is fixedly installed with a fixing rod, the lower end of the fixing rod is fixedly installed with multiple groups of adsorption cotton through connecting rod 3, and the extrusion groove matches connecting rod 3.

[0013] Preferably, the adsorption cotton includes a middle-layer extrusion plate, both sides of which are fixedly installed with activated carbon fibers, and the inner side of the middle-layer extrusion plate is fixedly installed with a limiting ball, which matches the thread groove. The adsorption cotton is driven by the starting cylinder to adsorb the condensate on the outer wall of the condenser tube, and at the same time, the limiting ball on the middle-layer extrusion plate of the adsorption cotton drives the condenser tube to rotate along the direction of the thread groove. During the rotation of the condenser tube, the activated carbon fibers absorb and filter the condensate beads on the outer wall of the condenser tube, and at the same time, the activated carbon fibers can also adsorb the fine impurities inside the condensate. When the extrusion plate moves to one side of the extrusion shell, the activated carbon fiber is gradually squeezed, and the condensed water inside the activated carbon fiber will flow into the connecting water pipe five along the connecting water pipe four. Small impurities will remain inside the activated carbon fiber and be cleaned after the operation of the device is completed. In the process of the middle extrusion plate moving back and forth, the activated carbon fibers on both sides will be squeezed in turn, and some of the unabsorbed condensate falls into the inside of the drain trough and finally falls into the connecting water pipe five. The condensate inside the connecting water pipe five is uniformly extracted to the inside of the pre-cooling box for pre-cooling of the exhaust gas, which greatly improves the energy-saving effect of the device.

[0014] Preferably, the adsorption cotton is slidably connected to the condenser.

[0015] Preferably, the precooling box includes a precooling shell, two groups of air inlets are opened on one side of the precooling shell, a precooling pipe is arranged inside the precooling shell, a connecting pipe six is ​​installed through the upper end of the precooling pipe, a water pump is provided at one end of the connecting pipe six, the water inlet end of the water pump is connected to the connecting water pipe five, a connecting pipe seven is installed through the lower end of the precooling pipe, and the connecting pipe seven is connected to the collecting box. The condensed water stored in the connecting water pipe five is gradually drawn into the interior of the precooling pipe under the action of the water pump, and the high-temperature exhaust gas blown in from the air inlet is subjected to preliminary cooling pretreatment.

[0016] Preferably, a delivery pipe is installed through the upper end of the pre-cooling shell, and an air intake shell is installed through one end of the delivery pipe. The air intake shell matches the air intake groove, and a diverter plate is provided at the lower end of the air intake shell. At the same time, most of the pretreated exhaust gas is transported to the air intake shell through the delivery pipe, and then evenly dispersed to the surface of multiple groups of condensing tubes through the diverter plate for condensation treatment. In addition, a small part of the exhaust gas is blown upward under the restriction of the inclined groove, forming counter convection with the exhaust gas to be discharged from the exhaust port, thereby increasing the residence time of the exhaust gas inside the box shell.

[0017] The technical effects and advantages of the present invention are as follows: In the present invention, during the condensation stage, multiple groups of threaded grooves on the outside of the condenser tube cooperate with the limiting balls in the cleaning assembly. When the cylinder drives the adsorption cotton to slide along the outer wall of the condenser tube, the limiting balls are embedded in the threaded grooves to drive the condenser tube to rotate slowly, so that the contact between the surface of the condenser tube and the hot exhaust gas is more uniform, avoiding local overheating; at the same time, the stirring blades inside the condenser tube stir the condensed liquid when the tube body rotates, accelerating the internal heat transfer, reducing the temperature difference between the inside and outside of the tube, and reducing the probability of thermal stress generation; In the present invention, the activated carbon fibers on both sides of the adsorption cotton utilize the characteristics of high specific surface area to quickly adsorb the liquid droplets on the surface of the condenser tube, and the adsorption efficiency can reach more than 90%. The liquid droplets that are not adsorbed are difficult to dissipate due to the slowdown of the air flow speed under the action of reverse convection and deflectors. When the adsorption cotton moves to the extrusion groove of the extrusion shell, the activated carbon fibers are pressurized to discharge the internal condensed water, which is recovered to the pre-cooling box through the drainage hole and connecting water pipes four and five for pre-cooling of exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components: Figure 1 The overall structure of the condensation box of the present invention is shown in FIG. Figure 1 ; Figure 2 The overall structure of the condensation box of the present invention is shown in FIG. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the box shell of the present invention; Figure 4 This is a schematic diagram of the external structure of the condensation box of the present invention; Figure 5 Schematic diagram of the internal structure of the condensation box of the present invention Figure 1 ; Figure 6 Schematic diagram of the internal structure of the condensation box of the present invention Figure 2 ; Figure 7 Schematic diagram of the external structure of the condenser of the present invention; Figure 8 It is an enlarged structural schematic diagram of Figure A of the present invention; Figure 9 It is a schematic diagram of the internal structure of the pre-cooling box of the present invention.

[0019] Legend: 1. Condenser; 11. Box shell; 111. Exhaust port; 112. Chute; 113. Air inlet slot; 114. Drain slot; 115. Baffle; 12. Circulation pump; 121. Connecting water pipe 1; 122. Connecting water pipe 2; 123. Connecting water pipe 3; 124. Connecting shell; 1241. Connecting rod 1; 1242. Stirring blade; 1243. Connecting water pipe 4; 1244. Connecting water pipe 5; 125. Condenser; 1251. Threaded groove; 1252. Extrusion shell; 1253. Extrusion Groove; 1254, drain hole; 13, cleaning assembly; 131, cylinder; 132, connecting rod two; 133, fixing rod; 1331, connecting rod three; 134, adsorption cotton; 1341, middle extrusion plate; 1342, activated carbon fiber; 1343, limiting ball; 2, pre-cooling box; 21, pre-cooling shell; 211, air inlet; 212, delivery pipe; 213, air inlet shell; 214, diverter plate; 215, air inlet; 22, pre-cooling pipe; 221, air inlet; 222, connecting pipe six; 223, connecting pipe seven. DETAILED DESCRIPTION

[0020] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0021] Reference Figure 1-2 As shown, the present invention provides a technical solution: an energy-saving condensing device for recovering organic solvents, comprising a condensing box 1, a pre-cooling box 2 is fixedly installed on one side of the condensing box 1, the condensing box 1 comprises a box shell 11, a circulating pump 12 is provided at the upper end of the box shell 11, one end of the circulating pump 12 is connected to the chiller through a connecting water pipe 121, an exhaust port 111 is provided on one side of the box shell 11, and when the device is in use, the waste gas containing the organic solvent is introduced into the interior of the pre-cooling box 2 for pre-cooling treatment, so as to prevent the high-temperature waste gas from directly entering the condensing box 1, which will cause the equipment to be subjected to a large thermal shock, and long-term operation is prone to thermal stress, resulting in deformation and damage to the equipment, and the waste gas that has undergone pre-cooling treatment flows into the upper end of the box shell 11 for condensation treatment, and the high-temperature waste gas is condensed and then collected.

[0022] Reference Figure 2-4As shown, the present invention provides a technical solution: an energy-saving organic solvent recovery condensing device, a box shell 11 is provided with multiple groups of inclined slots 112 on one side, the inclined slots 112 are connected to the pre-cooling box 2, the lower end of the box shell 11 is provided with a drainage slot 114, the interior of the exhaust port 111 is fixedly installed with multiple groups of baffles 115, the upper end of the box shell 11 is provided with an air inlet slot 113, and in the process of the exhaust gas entering the box shell 11 from the pre-cooling box 2, most of the exhaust gas flows into the interior of the box shell 11 from the air inlet slot 113, and a small part of the exhaust gas is blown upward under the restriction of the inclined slot 112 This part of the exhaust gas flowing upward forms a counter-convection with the exhaust gas that is moving downward and is about to be discharged from the exhaust port 111, which slightly blocks the downward exhaust gas. According to actual measurements, the counter-convection structure extends the average residence time of the exhaust gas in the device from 1.2 seconds of the traditional device to 3.5 seconds, which prolongs the contact time of the exhaust gas with the condenser 125 inside the box shell 11, thereby improving the condensation effect of the exhaust gas. A plurality of baffles 115 are fixedly installed inside the exhaust port 111. These baffles 115 further disrupt the flow trajectory of the exhaust gas, making it impossible to discharge it quickly and in a straight line.

[0023] Reference Figure 3-5 As shown, the present invention provides a technical solution: an energy-saving organic solvent recovery condensing device, the water outlet of the circulating pump 12 is provided with a second connecting water pipe 122, one end of the second connecting water pipe 122 passes through the upper end of the box shell 11 and is fixedly installed with a connecting shell 124, the water inlet of the circulating pump 12 is provided with a third connecting water pipe 123, one end of the third connecting water pipe 123 also passes through the upper end of the box shell 11 and is fixedly installed with a connecting shell 124, multiple groups of condensing pipes 125 are rotatably installed between the two groups of connecting shells 124, and a cleaning component 13 is slidably provided on the outer side of the condensing pipe 125. After the device is used for a period of time, the condensate gradually condenses on the outer wall of the condensing pipe 125. The condensed liquid droplets are half in contact with the condenser tube 125 and half in contact with the hot exhaust gas, which will cause uneven local temperature distribution on the surface of the condenser tube 125. The repeated action of thermal stress can easily cause fatigue cracks in the condenser tube, reduce the structural strength of the equipment, and eventually cause equipment damage. At the same time, the condensed liquid droplets are adsorbed on the outer wall of the condenser tube 125, which affects its condensation efficiency. At the same time, under the action of the continuously flowing exhaust gas, part of the liquid droplets will be carried out of the box shell 11 with the gas flow, which greatly affects the recovery of the condensed liquid droplets. At this time, the cleaning component 13 is started to adsorb and collect the condensed liquid droplets attached to the outer wall of the condenser tube 125, and preliminary filtration is performed to improve the recovery efficiency of the condensed liquid droplets.

[0024] Reference Figure 5-7As shown, the present invention provides a technical solution: an energy-saving condensing device for recovering organic solvents, wherein a plurality of groups of condensing tubes 125 are provided with threaded grooves 1251 on the outer sides thereof, and the threaded grooves 1251 are matched with the cleaning assembly 13. When the exhaust gas flows from the air inlet groove 113 from top to bottom into the interior of the box shell 11, the upper half of the condensing tube 125 is in contact with the exhaust gas for a long time, which easily leads to uneven condensation of the condensing tube 12. By adsorbing and filtering the condensate on the outer wall of the condensing tube 125 in the cleaning assembly 13, the condensing tube 125 is driven to rotate slowly, so that the contact surface between the condensing tube 125 and the exhaust gas is more uniform, thereby improving the condensation efficiency of the condensing tube 125.

[0025] Reference Figure 5-7 As shown, the present invention provides a technical solution: an energy-saving condensing device for recovering organic solvents, two groups of extrusion shells 1252 are symmetrically arranged on the outside of the condenser tube 125, the extrusion shells 1252 are rotatably connected to the condenser tube 125, a drainage hole 1254 is opened on one side of the two groups of extrusion shells 1252, the drainage hole 1254 is connected to the connecting water pipe four 1243, the lower ends of the two groups of connecting water pipe four 1243 are penetrated by a connecting water pipe five 1244, the connecting water pipe five 1244 is connected to the pre-cooling box 2, the connecting water pipe five 1244 is connected to the drainage trough 114, and the upper end of the extrusion shell 1252 is provided with an extrusion groove 1253.

[0026] Reference Figure 5-7 As shown, the present invention provides a technical solution: an energy-saving condensing device for recovering organic solvents, wherein a connecting rod 1241 is fixedly installed inside two sets of connecting shells 124, and a stirring blade 1242 is fixedly installed on the outside of the connecting rod 1241. During the rotation of the condenser 125, since the connecting rod 1241 and the stirring blade 1242 outside it are fixed inside the two sets of connecting shells 124, during the rotation of the condenser 125, the condensed liquid inside the condenser 125 will rotate relatively, and in the process of condensing the steam, the heat exchange efficiency of the liquid circulation is improved.

[0027] Reference Figure 5-8 As shown, the present invention provides a technical solution: an energy-saving condensing device for recovering organic solvents, the cleaning component 13 includes a cylinder 131, the driving end of the cylinder 131 is fixedly installed with a connecting rod 2 132, one end of the connecting rod 2 132 passes through one side of the box shell 11 and is fixedly installed with a fixing rod 133, the lower end of the fixing rod 133 is fixedly installed with multiple groups of adsorption cotton 134 through the connecting rod 3 1331, and the extrusion groove 1253 matches the connecting rod 3 1331.

[0028] Reference Figure 8As shown, the present invention provides a technical solution: an energy-saving condensing device for recovering organic solvents, the adsorption cotton 134 includes a middle-layer extrusion plate 1341, and activated carbon fibers 1342 are fixedly installed on both sides of the middle-layer extrusion plate 1341. A limiting ball 1343 is fixedly installed on the inner side of the middle-layer extrusion plate 1341, and the limiting ball 1343 matches the thread groove 1251. The adsorption cotton 134 is driven by starting the cylinder 131 to adsorb the condensate on the outer wall of the condenser tube 125. At the same time, the limiting ball 1343 on the middle-layer extrusion plate 1341 of the adsorption cotton 134 drives the condenser tube 125 to rotate along the direction of the thread groove 1251. During the rotation of the condenser tube 125, the activated carbon fibers 1342 absorb and filter the condensate beads on the outer wall of the condenser tube 125. At the same time, the activated carbon fibers 1342 absorb and filter the condensate beads on the outer wall of the condenser tube 125. 1342 can also adsorb fine impurities inside the condensate. When the middle extrusion plate 1341 moves to one side of the extrusion shell 1252, the activated carbon fiber 1342 is gradually squeezed, and the condensed water inside the activated carbon fiber 1342 will flow into the connecting water pipe five 1244 along the connecting water pipe four 1243. Fine impurities will remain inside the activated carbon fiber 1342 and be cleaned after the operation of the device is completed. In the process of the middle extrusion plate 1341 moving back and forth, the activated carbon fibers 1342 on both sides will be squeezed in turn, and some of the unabsorbed condensate falls into the inside of the drain trough 114 and finally falls into the connecting water pipe five 1244. The condensate inside the connecting water pipe five 1244 is uniformly extracted to the inside of the pre-cooling box 2 for pre-cooling of the exhaust gas, which greatly improves the energy-saving effect of the device.

[0029] Reference Figure 7-8 As shown, the present invention provides a technical solution: an energy-saving condensing device for recovering organic solvents, wherein the adsorption cotton 134 is slidably connected to the condensing tube 125.

[0030] Reference Figure 1 、 Figure 9 As shown, the present invention provides a technical solution: an energy-saving condensing device for recovering organic solvents, the precooling box 2 includes a precooling shell 21, two groups of air inlets 215 are opened on one side of the precooling shell 21, a precooling pipe 22 is arranged inside the precooling shell 21, the upper end of the precooling pipe 22 is penetrated by a connecting pipe 6 222, one end of the connecting pipe 6 222 is provided with a water pump 221, the water inlet end of the water pump 221 is connected to the connecting water pipe 5 1244, the lower end of the precooling pipe 22 is penetrated by a connecting pipe 7 223, the connecting pipe 7 223 is connected to the collecting box, the condensed water stored in the connecting water pipe 5 1244 is gradually extracted into the interior of the precooling pipe 22 under the action of the water pump 221, and the high-temperature exhaust gas blown in from the air inlet 215 is preliminarily cooled and pretreated.

[0031] Reference Figure 9As shown, in this embodiment: a delivery pipe 212 is installed through the upper end of the pre-cooling shell 21, and an air intake shell 213 is installed through one end of the delivery pipe 212. The air intake shell 213 matches the air intake groove 113, and a diverter plate 214 is provided at the lower end of the air intake shell 213. At the same time, most of the pretreated exhaust gas is transported to the air intake shell 213 through the delivery pipe 212, and is evenly dispersed to the surface of multiple groups of condensing tubes 125 through the diverter plate 214 for condensation treatment. In addition, a small part of the exhaust gas is blown upward under the restriction of the inclined groove 112, forming counter-convection with the exhaust gas to be discharged from the exhaust port 111, thereby increasing the residence time of the exhaust gas inside the box shell 11.

[0032] Working principle: The waste gas containing organic solvent first enters through the air inlet 215 of the pre-cooling box 2, and the condensed water connected to the water pipe 5 1244 is extracted by the water pump 221 to the pre-cooling pipe 22 for pre-cooling. Most of the pre-cooled waste gas enters the box shell 11 from the air inlet groove 113 through the delivery pipe 212, the air inlet shell 213 and the diverter plate 214. A small part is blown upward through the inclined groove 112 to form a counter-current with the downward waste gas, and the deflector 115 in the exhaust port 111 is used to extend the waste gas residence time to 3.5 seconds. The circulating pump 12 is connected to the chiller through the connecting water pipe 121, driving the condensate through the connecting pipe 212. The water receiving pipe 2 122 and the connecting shell 124 enter the condensing pipe 125. When the condensing pipe 125 rotates, the internal stirring blades 1242 stir the condensate to improve the heat exchange efficiency. At the same time, the cylinder 131 drives the adsorption cotton 134 to slide along the threaded groove 1251, adsorbing the condensate beads on the outer wall of the condensing pipe 125 and driving it to rotate to make the condensation more uniform. The adsorbed condensate is recovered to the pre-cooling box 2 through the drainage hole 1254 of the extrusion shell 1252, the connecting water pipe 4 1243 and the connecting water pipe 5 1244. The condensate that is not absorbed is collected into the connecting water pipe 5 1244 through the drainage groove 114, thereby achieving energy-saving recovery.

[0033] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An energy-saving condensing device for recovering organic solvents, characterized in that: The condenser comprises a condenser box, a pre-cooling box is fixedly mounted on one side of the condenser box, the condenser box comprises a box shell, a circulation pump is provided on the upper end of the box shell, a plurality of chute groups are provided on one side of the box shell, the chute is connected to the pre-cooling box, and an air inlet groove is provided on the upper end of the box shell; The output end of the circulation pump is provided with a second connecting water pipe, one end of which passes through the upper end of the box shell and is fixedly installed with a connecting shell. The input end of the circulation pump is provided with a third connecting water pipe, one end of which passes through the upper end of the box shell and is fixedly installed with a connecting shell. Multiple groups of condensing tubes are rotatably installed between the two groups of connecting shells. A cleaning assembly is slidably provided on the outer side of the condensing tube. Two groups of extrusion shells are symmetrically provided on the outer side of the condensing tube, and the extrusion shells are rotatably connected to the condensing tubes. The cleaning assembly includes a cylinder, a driving end of the cylinder is fixedly installed with a connecting rod 2, one end of the connecting rod 2 passes through one side of the box shell and is fixedly installed with a fixing rod, the lower end of the fixing rod is fixedly installed with a connecting rod 3, and the outer side of the connecting rod 3 is fixedly installed with multiple groups of adsorption cotton, and the adsorption cotton matches the extrusion shell.

2. The energy-saving organic solvent recovery condensing device according to claim 1, characterized in that: A drainage trough is provided at the lower end of the box shell, and a plurality of baffles are fixedly installed inside the exhaust port.

3. The energy-saving organic solvent recovery condensing device according to claim 1, characterized in that: The outer sides of the multiple groups of condensing tubes are all provided with thread grooves, and the thread grooves are matched with the cleaning components.

4. The energy-saving organic solvent recovery condensing device according to claim 1, characterized in that: A drainage hole is provided on one side of the two groups of extruded shells, and the drainage hole is connected to the connecting water pipe four. A connecting water pipe five is installed through the lower ends of the two groups of connecting water pipes four, and the connecting water pipe five is connected to the pre-cooling box. The connecting water pipe five is connected to the drainage trough, and an extrusion groove is provided at the upper end of the extruded shell.

5. The energy-saving organic solvent recovery condensing device according to claim 1, characterized in that: A connecting rod 1 is fixedly installed inside the two groups of connecting shells, and a stirring blade is fixedly installed on the outside of the connecting rod 1.

6. The energy-saving organic solvent recovery condensing device according to claim 1, characterized in that: The adsorption cotton includes a middle-layer extrusion plate, activated carbon fibers are fixedly installed on both sides of the middle-layer extrusion plate, and a limiting ball is fixedly installed on the inner side of the middle-layer extrusion plate, and the limiting ball matches the thread groove.

7. The energy-saving organic solvent recovery condensing device according to claim 6, characterized in that: The adsorption cotton is slidably connected to the condenser tube.

8. The energy-saving organic solvent recovery condensing device according to claim 1, characterized in that: The pre-cooling box includes a pre-cooling shell, two groups of air inlets are opened on one side of the pre-cooling shell, a pre-cooling pipe is arranged inside the pre-cooling shell, a connecting pipe six is ​​installed through the upper end of the pre-cooling pipe, a water pump is provided at one end of the connecting pipe six, the water inlet end of the water pump is connected to the connecting water pipe five, a connecting pipe seven is installed through the lower end of the pre-cooling pipe, and the connecting pipe seven is connected to the collection box.

9. The energy-saving organic solvent recovery condensing device according to claim 8, characterized in that: A delivery pipe is installed through the upper end of the pre-cooling shell, and an air intake shell is installed through one end of the delivery pipe.

10. The energy-saving organic solvent recovery condensing device according to claim 9, characterized in that: The air intake shell matches the air intake groove, and a diverter plate is provided at the lower end of the air intake shell.

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