Hydrogen peroxide p-menthane production tail gas treatment device

Abstract

The utility model discloses a hydrogen peroxide p-menthane production tail gas treatment device, which relates to the technical field of organic chemistry, and comprises a cooling unit and a cyclone separator, one end of the cooling unit is connected with a tail gas pipeline, the other end of the cooling unit is connected with a gas inlet hole of the cyclone separator, the cooling unit is used for reducing the temperature of the tail gas, and the cyclone separator is used for separating the tail gas. The residual hydrogen peroxide p-menthane in the tail gas is condensed into liquid drops. The problems that the production efficiency of the hydrogen peroxide p-menthane is reduced and air is polluted and damaged due to the fact that the tail gas in the existing hydrogen peroxide p-menthane production contains the hydrogen peroxide p-menthane gas and is directly discharged are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of organic chemical industry, and particularly relates to a tail gas treatment device for producing menthane with hydrogen peroxide. Background Art

[0002] Perhydroperoxide is a class of organic compounds containing peroxide groups. Its chemical formula is generally C 10 H 20 O2, in which the oxygen atom is connected to two alkyl carbon atoms through a peroxide bond. P-Hydrogen peroxide is a liquid, colorless or light yellow at room temperature, with a pungent and irritating odor. It is soluble in organic solvents such as ethanol, ether and petroleum ether. P-Hydrogen peroxide has the characteristics of oxidizing and free radical reaction, so it has certain uses in industry and laboratories. It can be used as an initiator, a peroxidant for polymerization reactions, and a stabilizer for colloidal systems.

[0003] Since high temperature will be generated during the production of 2-menthane hydrogen peroxide, the tail gas produced during the production of 2-menthane hydrogen peroxide will contain some 2-menthane hydrogen peroxide gas. Direct discharge of this tail gas will not only reduce the production efficiency of 2-menthane hydrogen peroxide, but also cause pollution and damage to the air.

[0004] Therefore, a tail gas treatment device for producing menthane using hydrogen peroxide is needed. Utility Model Content

[0005] The purpose of the utility model is to provide a tail gas treatment device for the production of hydrogen peroxide to menthane, thereby solving the problem that the tail gas during the production of hydrogen peroxide to menthane contains hydrogen peroxide to menthane gas, and direct discharge not only leads to a decrease in the production efficiency of hydrogen peroxide to menthane, but also causes pollution and damage to the air. The specific technical solution is as follows:

[0006] A tail gas treatment device for the production of paramenoxide of hydrogen peroxide comprises a cooling unit and a cyclone separator, wherein one end of the cooling unit is connected to a tail gas pipeline, and the other end of the cooling unit is connected to an air inlet of the cyclone separator, and the cooling unit is used to reduce the tail gas temperature so that the paramenoxide of hydrogen peroxide remaining in the tail gas condenses into droplets.

[0007] Preferably, the cooling unit includes an air pipe, a cooling pipe, a first water inlet pipe, a first drain pipe and a connecting pipe, one end of the air pipe is connected to the exhaust gas pipe, the other end of the air pipe is connected to the air inlet of the cyclone separator, a plurality of through holes penetrating the air pipe are arranged in an array in the middle of the air pipe, the connecting pipe is installed in the through holes and sealed with the through holes, the cooling pipe is sleeved on the air pipe, the cooling pipe completely surrounds the through holes, the first water inlet pipe is connected to one end of the cooling pipe, the first drain pipe is connected to one end of the cooling pipe away from the first water inlet pipe, and the water flow direction in the cooling pipe is opposite to the exhaust gas flow direction.

[0008] Preferably, the outer side wall of the cooling pipe is covered with a layer of heat-insulating material.

[0009] Preferably, the cooling medium in the cooling pipe is circulating water at 30-31°C.

[0010] Preferably, a condensation jacket is installed on the outer side wall of the cyclone separator, the upper end of the condensation jacket is connected to a second water inlet pipe, and the lower end of the condensation jacket is connected to a second drain pipe.

[0011] Preferably, the cooling medium in the condensation jacket is low-temperature water at 20 to 22°C.

[0012] Preferably, an activated carbon adsorption device is installed at the exhaust port of the cyclone separator.

[0013] Compared with the existing technology, the utility model has the following beneficial effects:

[0014] 1. The utility model cools the tail gas by a cooling unit and a condensation jacket, so that the hydrogen peroxide-paramenane gas in the tail gas is condensed into droplets, and then the tail gas and the hydrogen peroxide-paramenane are separated by a cyclone separator, thereby improving the productivity of the hydrogen peroxide-paramenane.

[0015] 2. The utility model opens a through hole on the gas transmission pipe, and installs a connecting pipe in the through hole. The connecting pipe can increase the heat exchange area with the tail gas. When the cooling medium enters the connecting pipe, the heat exchange efficiency of the cooling unit can be improved, the waste of energy can be reduced, and the productivity of hydrogen peroxide to menthane can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of the internal structure of the cooling unit of the utility model.

[0019] Description of main reference numerals:

[0020] 1. Cooling unit; 101. Air pipe; 102. Cooling pipeline; 103. First water inlet pipe; 104. First drain pipe; 105. Connecting pipe; 2. Cyclone separator; 3. Second water inlet pipe; 4. Second drain pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] refer to Figure 1 to Figure 2 , one end of the air pipe 101 is connected to the exhaust pipe through a flange, and the other end is connected to the air inlet of the cyclone separator 2 through a flange. A plurality of through holes are arranged in an array in the middle of the air pipe 101, and the through holes penetrate the air pipe 101. The connecting pipe 105 is installed in the through holes through a sealed connection, so that the air pipe 101 does not exchange substances with the outside world. The part of the air pipe 101 with the through holes is in a vertical state, which facilitates the rapid flow of the cooling medium and ensures the cooling efficiency of the exhaust gas. The cooling pipe 102 is welded on the air pipe 101, and the cooling pipe 102 completely covers the through hole. The upper end of the cooling pipe 102 is connected to the first water inlet pipe 103 through a flange, and the lower end is connected to the first drain pipe 104 through a flange. The cooling medium flows from top to bottom, and the exhaust gas flows from bottom to top. When the cooling medium enters the cooling pipe 102, it also enters the connecting pipe 105. Since the connecting pipe 105 runs through the inside of the gas transmission pipe 101, the heat exchange area between the cooling medium and the exhaust gas is increased, thereby improving the heat exchange efficiency and the utilization rate of the cooling medium.

[0023] In order to ensure that the cooling pipe 102 is completely filled with cooling medium, a pressure relief valve can be installed on the first drain pipe 104. When the cooling medium in the cooling pipe meets the specified pressure, the first drain pipe 104 starts to drain water to ensure that the cooling medium is fully in contact with the gas pipe 101 and the connecting pipe 105. The cooling medium in the cooling pipe is circulating water at 30-31°C, which can initially cool the exhaust gas. In order to reduce energy waste, the cooling pipe 102 is covered with a layer of insulation material, such as asbestos, rock wool and polyurethane materials.

[0024] The tail gas cooled by the cooling pipe 102 will enter the cyclone separator 2. A condensation jacket is installed on the outer wall of the cyclone separator 2. The upper end of the condensation jacket is connected to a second water inlet pipe 3, and the lower end of the condensation jacket is connected to a second drain pipe 4. The cooling medium in the condensation jacket is low-temperature water at 20 to 22°C. The cyclone separator 2 will cool the tail gas for a second time. Under normal conditions, hydrogen peroxide paramenane is a colorless liquid. Therefore, after two coolings, hydrogen peroxide paramenane in the tail gas will condense into droplets, making the tail gas settle to a gas-liquid mixture. Since the mass of the droplets is larger, the inertia will also be greater. When the tail gas enters the cyclone separator 2, the airflow will change from linear motion to circular motion. The vast majority of the rotating airflow flows spirally from the cylinder to the cone along the wall of the device. In addition, under the action of centrifugal force, the droplets are thrown toward the wall of the device. Once the droplets contact the wall of the device, they lose their inertial force, and the momentum of the downward axial velocity near the wall falls along the wall surface, enters the discharge pipe and is collected, thereby improving the production efficiency of hydrogen peroxide to menthane. The rotating and descending external vortex airflow continuously flows into the central part of the separator during the descent process, forming a centripetal radial airflow, and this part of the airflow constitutes a rotating upward internal vortex. The internal vortex will be discharged from the exhaust port of the cyclone separator 2. At this time, a small amount of hydrogen peroxide to menthane and other odorous gases will still remain in the internal vortex. Therefore, the present invention is used to install an activated carbon adsorption device at the exhaust port of the cyclone separator 2 to further filter and purify the gas discharged from the cyclone separator 2. So that the production tail gas of hydrogen peroxide to menthane can meet the emission standards.

[0025] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A tail gas treatment device for producing menthane with hydrogen peroxide, characterized in that: The invention comprises a cooling unit (1) and a cyclone separator (2), wherein one end of the cooling unit (1) is connected to an exhaust gas pipeline, and the other end of the cooling unit (1) is connected to an air inlet of the cyclone separator (2). The cooling unit (1) is used to reduce the exhaust gas temperature so that the hydrogen peroxide and paramenane remaining in the exhaust gas are condensed into liquid droplets.

2. The tail gas treatment device for producing menthane with hydrogen peroxide according to claim 1, characterized in that: The cooling unit (1) comprises an air delivery pipe (101), a cooling pipeline (102), a first water inlet pipe (103), a first drain pipe (104) and a connecting pipe (105); one end of the air delivery pipe (101) is connected to the exhaust pipe, and the other end of the air delivery pipe (101) is connected to the air inlet of the cyclone separator (2); a plurality of through holes penetrating the air delivery pipe (101) are arranged in an array in the middle of the air delivery pipe (101); and the connecting pipe (105) is arranged The cooling pipe (102) is installed in the through hole and sealed with the through hole. The cooling pipe (102) is sleeved on the gas pipe (101). The cooling pipe (102) completely surrounds the through hole. The first water inlet pipe (103) is connected to one end of the cooling pipe (102). The first drain pipe (104) is connected to one end of the cooling pipe (102) away from the first water inlet pipe (103). The water flow direction in the cooling pipe (102) is opposite to the exhaust gas flow direction.

3. A tail gas treatment device for producing menthane with hydrogen peroxide according to claim 2, characterized in that: The outer wall of the cooling pipe (102) is covered with a layer of heat-insulating material.

4. The tail gas treatment device for producing menthane with hydrogen peroxide according to claim 2, characterized in that: The cooling medium in the cooling pipe (102) is circulating water at 30-31°C.

5. The tail gas treatment device for producing menthane with hydrogen peroxide according to claim 1, characterized in that: A condensation jacket is installed on the outer wall of the cyclone separator (2), the upper end of the condensation jacket is connected to a second water inlet pipe (3), and the lower end of the condensation jacket is connected to a second drain pipe (4).

6. The tail gas treatment device for producing menthane with hydrogen peroxide according to claim 5, characterized in that: The cooling medium in the condensation jacket is low-temperature water at 20-22°C.

7. The tail gas treatment device for producing menthane with hydrogen peroxide according to claim 1, characterized in that: An activated carbon adsorption device is installed at the exhaust port of the cyclone separator (2).

Images