Toluene condensation recovery device

Abstract

The utility model relates to a toluene condensation recovery device. The condenser comprises a condenser shell, a condensing pipe, an air inlet pipe, an exhaust pipe and a condensate collecting pipe, wherein a first partition plate and a second partition plate are arranged in the condenser shell; a plurality of communicating pipes vertically communicate between the two partition plates, the condensation pipes penetrate through the communicating pipes, an annular condensation cavity is formed between the condensation pipes and the communicating pipes, spiral pieces are rotationally connected into the condensation cavity and attached to the outer walls of the condensation pipes, and a driving assembly for driving the spiral pieces to rotate is further arranged on the condenser shell. And the condensate collecting pipe is connected to the bottom of the air inlet cavity. The driving assembly can drive all the spiral pieces to rotate slowly, in the rotating process, the spiral pieces can scrape liquid beads on the outer wall of the condensation pipe, and the liquid beads flow back to the air inlet cavity along the spiral pieces under the action of gravity and finally flow out of the condensation liquid collecting pipe, so that mixed steam entering the device can be in direct contact with the condensation pipe, and the condensation effect is improved. And the condensation efficiency is high.

Description

Technical Field

[0001] The utility model relates to a condenser, in particular to a toluene condensation recovery device. Background Art

[0002] Toluene is an organic compound with strong refractive index and the ability to dissolve many organic substances, such as paints, coatings, plastics and rubber. This solubility property makes toluene a solvent or additive in leveling agents and brighteners. However, toluene is a carcinogen, so the use of toluene needs to be strictly controlled to ensure that it does not have a negative impact on the environment and human health. For this reason, there is a toluene removal process in the production process of leveling agents and brighteners. Since toluene is volatile, high-temperature distillation separation process is generally used to reduce toluene in the product.

[0003] In order to improve resource utilization, factories generally use the condensation method to recover toluene from steam for the second time. However, when the existing condenser is used for toluene condensation recovery, the liquefied toluene on the condenser tube is not easy to drip, which will cause the condenser tube to be wrapped by toluene droplets. As a result, the hot gas of toluene cannot directly contact the condenser tube, but can only contact the toluene droplets on the condenser tube. The temperature difference becomes relatively small, and the condensation efficiency becomes low, which leads to a low overall condensation recovery rate and an inability to reliably recover toluene. Summary of the invention

[0004] The utility model provides a toluene condensation recovery device, which solves the problem in the prior art that the condensation efficiency is reduced due to the condensation pipe being wrapped by toluene droplets.

[0005] The above-mentioned technical problems of the utility model are mainly solved by the following technical scheme: a toluene condensation recovery device, comprising a condenser shell, a condenser pipe, an air inlet pipe, an exhaust pipe and a condensate collecting pipe, characterized in that: a first partition plate and a second partition plate are arranged in the condenser shell, the two partition plates divide the inner cavity of the condenser shell into an air inlet cavity and an air outlet cavity, the air outlet cavity is located on the upper side of the air inlet cavity, the air inlet pipe is connected with the air inlet cavity, and the exhaust pipe is connected with the air outlet cavity; a plurality of conducting pipes for connecting the air inlet cavity and the air outlet cavity are vertically connected between the two partition plates, the condenser pipe is arranged to penetrate the conducting pipe, an annular condensation cavity is formed between the condenser pipe and the conducting pipe, a spiral sheet is rotatably connected in the condensation cavity, the spiral sheet is in contact with the outer wall of the condenser pipe, a driving component for driving the spiral sheet to rotate is also arranged on the condenser shell, and the condensate collecting pipe is connected to the bottom of the air inlet cavity.

[0006] The working principle of the utility model is as follows: mixed hot steam containing toluene flows into the air inlet cavity from the air inlet pipe and then dispersed into each condensation cavity. In the process of passing through the guide tube, due to the separation effect of the spiral blades, the steam must flow in a spiral curve, which increases the contact time with the condensation tube, thus improving the condensation reliability. At the same time, the driving component will drive all the spiral blades to rotate slowly. During the rotation, the spiral blades will scrape off the liquid droplets on the outer wall of the condensation tube. These liquid droplets will flow back to the air inlet cavity along the spiral blades under the action of gravity, and finally flow out from the condensate collection tube, and the condensed steam will flow into the exhaust pipe from the air outlet cavity for discharge.

[0007] Furthermore, the inner tube is rotatably sleeved in the conducting tube, the spiral sheet is fixed relative to the inner tube, and the driving assembly can drive the inner tube to be rotatably arranged relative to the conducting tube. This design allows the conducting tube and the condensing tube to be fixed, the inner tube is assembled in the condensing chamber, and the condensing chamber is used to pass steam, so that the overall airtightness is easier to achieve.

[0008] Therefore, compared with the prior art, the utility model has the following characteristics: 1. The steam must flow in a spiral curve, which increases the contact time with the condenser and significantly improves the recovery and extraction rate of toluene in the mixed steam; 2. At the same time, the driving component will drive all the spiral blades to rotate slowly. During the rotation process, the spiral blades will scrape off the liquid droplets on the outer wall of the condenser. These liquid droplets will flow back to the air inlet cavity along the spiral blades under the action of gravity, and finally flow out from the condensate collection pipe. In this way, the mixed steam entering the utility model can directly contact the condenser, and the condensation efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 It is a structural schematic diagram of the utility model;

[0010] Attached Figure 2 Yes Figure 1 Enlarged view of part A. DETAILED DESCRIPTION

[0011] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0012] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0013] Example 1: See Figure 1 and Figure 2 A toluene condensation recovery device comprises a condenser shell 10, a condenser tube 20, an air inlet pipe 30, an exhaust pipe 40 and a condensate collecting pipe 50. A first partition plate 60 and a second partition plate 70 are arranged in the condenser shell. The two partition plates divide the inner cavity of the condenser shell into an air inlet cavity 11 and an air outlet cavity 12. The air outlet cavity is located on the upper side of the air inlet cavity. The air inlet pipe is connected to the air inlet cavity, and the exhaust pipe is connected to the air outlet cavity. A plurality of conducting pipes 80 for connecting the air inlet cavity and the air outlet cavity are vertically connected between the two partition plates. The condenser tube is arranged to penetrate the conducting pipe. An annular condensation cavity 13 is formed between the condenser tube and the conducting pipe. A spiral piece 81 is rotatably connected in the condensation cavity. The spiral piece fits the outer wall of the condenser tube. A driving component for driving the spiral piece to rotate is also arranged on the condenser shell. The condensate collecting pipe is connected to the bottom of the air inlet cavity.

[0014] The working principle of this embodiment is as follows: mixed hot steam containing toluene flows into the air inlet chamber from the air inlet pipe and then dispersed into each condensation chamber. In the process of passing through the guide tube, due to the separation effect of the spiral blades, the steam must flow in a spiral curve, which increases the contact time with the condenser tube, thereby improving the condensation reliability. At the same time, the driving component will drive all the spiral blades to rotate slowly. During the rotation, the spiral blades will scrape off the liquid droplets on the outer wall of the condenser tube. These liquid droplets will flow back to the air inlet chamber along the spiral blades under the action of gravity, and finally flow out from the condensate collection tube, and the condensed steam will flow into the exhaust pipe from the air outlet chamber for discharge.

[0015] See Figure 2 The inner tube 90 is provided in a rotating sleeve in the conducting tube, the spiral sheet is fixed relative to the inner tube, and the driving assembly can drive the inner tube to rotate relative to the conducting tube. This design allows the conducting tube and the condensing tube to be fixed, the inner tube is assembled in the condensing chamber, and the condensing chamber is used to pass steam, so that the overall air tightness is easier to achieve.

[0016] See Figure 2 A spiral guide rail 91 is provided on the inner wall of the inner tube, and a slot 92 for inserting a spiral piece is formed on the spiral guide rail, and the spiral piece is made of a rubber sheet.

[0017] See Figure 1 The lower end of the inner tube is provided with a protruding conducting tube, a transmission gear 1 is fixed on the outer wall of the protruding inner tube, the transmission gears on the inner tubes in adjacent conducting tubes are meshed with each other, a reduction motor 2 is provided on the condenser shell, and a driving gear 3 is provided at the output end of the reduction motor, the driving gear is meshed with any transmission gear, and the transmission gear, the driving gear and the reduction motor constitute a driving assembly.

[0018] See Figure 2 A plurality of mounting holes for mounting the conducting pipe are formed on the two partitions, and an annular rubber sleeve 4 is sleeved in the mounting hole, and the inner diameter of the annular rubber sleeve is smaller than the outer diameter of the conducting pipe.

[0019] It is obvious to those skilled in the art that the utility model can be changed in many ways, and such changes are not considered to be out of the scope of the utility model. All such modifications obvious to those skilled in the art will be included in the scope of the claims.

Claims

1. A toluene condensation recovery device, comprising a condenser shell, a condenser tube, an air inlet pipe, an exhaust pipe and a condensate collecting pipe, characterized in that: A first partition and a second partition are provided in the condenser shell, and the two partitions divide the inner cavity of the condenser shell into an air inlet cavity and an air outlet cavity, and the air outlet cavity is located on the upper side of the air inlet cavity, the air inlet pipe is connected to the air inlet cavity, and the air outlet pipe is connected to the air outlet cavity; a plurality of conducting pipes for connecting the air inlet cavity and the air outlet cavity are vertically connected between the two partitions, the condenser tube is arranged to pass through the conducting pipe, and an annular condensation cavity is formed between the condenser tube and the conducting pipe, a spiral blade is rotatably connected in the condensation cavity, and the spiral blade is in contact with the outer wall of the condenser tube, and a driving component for driving the spiral blade to rotate is also provided on the condenser shell, and the condensate collection pipe is connected to the bottom of the air inlet cavity.

2. The toluene condensation recovery device according to claim 1, characterized in that: An inner tube is rotatably sleeved in the conducting tube, the spiral sheet is fixed relative to the inner tube, and the driving assembly can drive the inner tube to be rotatably arranged relative to the conducting tube.

3. The toluene condensation recovery device according to claim 2, characterized in that: A spiral guide rail is arranged on the inner wall of the inner tube, and a slot for inserting the spiral sheet is formed on the spiral guide rail.

4. The toluene condensation recovery device according to claim 2, characterized in that: The lower end of the inner tube is arranged to extend out of the conducting tube, and a transmission gear is fixed on the outer wall of the extended inner tube. The transmission gears on the inner tubes in adjacent conducting tubes are meshed with each other. A reduction motor is provided on the condenser shell, and a driving gear is provided at the output end of the reduction motor. The driving gear is meshed with any transmission gear. The transmission gear, the driving gear and the reduction motor constitute the driving assembly.

5. The toluene condensation recovery device according to claim 1, characterized in that: A plurality of mounting holes for mounting the conducting pipe are formed on the two partitions. An annular rubber sleeve is sleeved in the mounting holes. The inner diameter of the annular rubber sleeve is smaller than the outer diameter of the conducting pipe.

Images