Chlorohydrin reaction spraying device for producing epoxypropane

Abstract

According to the technical scheme, a chlorine injector is connected with a propylene injector through a connecting pipe, a chlorine connector is arranged on the upper side of a chlorine injector main body, a first injection nozzle is arranged in an inner cavity in the right side of the chlorine injector main body, and a first injection diffusion cavity is formed in an inner cavity in the left side of the chlorine injector main body; the left end is connected with the first mixer body; a propylene connector is arranged on the upper side of the propylene ejector, a second ejection nozzle is arranged in a right inner cavity, a second ejection diffusion cavity is formed in a left inner cavity, and the left end of the propylene ejector body is connected with a second mixer body. The device disclosed by the utility model has the beneficial effects that chlorine is firstly mixed and reacted with process water of the chlorine ejector, and a generated hypochlorous acid solution enters the propylene ejector; the gas-phase propylene and the hypochlorous acid solution are subjected to mixed reaction, so that direct contact between chlorine and propylene is avoided, the generation of dichloropropane is reduced, the side reaction of a chlorohydrination system is reduced, the utilization rate of propylene can be effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chlorohydrin reaction of propylene oxide devices, in particular to a chlorohydrin reaction injection device for propylene oxide production. Background Art

[0002] The key process in the chlorohydrin-based propylene oxide production process is the chlorohydrinization step. Using water as the reaction medium, chlorine reacts with water to produce hydrochloric acid and hypochlorous acid. Hypochlorous acid then reacts with propylene to produce chloropropanol. The resulting chloropropanol solution is buffered and then saponified to produce crude propylene oxide. Propylene oxide is the primary raw material for the transesterification process to produce dimethyl carbonate. With the booming new energy vehicle and energy storage industries, demand for ethylene carbonate, an indispensable electrolyte solvent for lithium batteries, is also growing. Therefore, producing high-quality propylene oxide is crucial to improving product profitability.

[0003] In the existing chlorohydrinization process of propylene oxide plants, chlorine and propylene are directly introduced into the chlorohydrinization system for the chlorohydrinization reaction. This has the following problems: on the one hand, the reaction is incomplete; on the other hand, side reactions in the chlorohydrinization system are increased. The side reaction is the formation of dichloropropane, which reduces the utilization rate of propylene and increases production costs. Utility Model Content

[0004] The purpose of the utility model is to address the above-mentioned defects of the prior art and provide a chlorohydrin reaction injection device for propylene oxide production. Chlorine first reacts with process water, and the generated hypochlorous acid then reacts with propylene, thereby avoiding direct contact between chlorine and propylene, reducing the generation of dichloropropane, reducing the side reactions of the chlorohydrin system, and effectively improving the utilization rate of propylene.

[0005] The utility model discloses a chlorohydrin reaction injection device for propylene oxide production, and its technical solution is as follows: comprising a chlorine injector (a), a propylene injector (b), and a connecting pipe (c), wherein the chlorine injector (a) is connected to the propylene injector (b) via the connecting pipe (c), the chlorine injector (a) comprises a chlorine injector body and a first mixer body (a6), a chlorine joint (a2) is provided on the upper side of the chlorine injector body, a first flange (a1) is provided at the right end of the chlorine injector body, a first injection nozzle (a9) is provided in the right inner cavity of the chlorine injector body, and the chlorine injector body is provided with a first nozzle (a1). A first injection diffusion chamber (a3) ​​is provided in the left inner cavity of the main body, and the left end of the chlorine injector main body is connected to the first mixer main body (a6); the propylene injector (b) includes a propylene injector main body and a second mixer main body, a propylene joint (b2) is provided on the upper side of the propylene injector main body, a second flange (b1) is provided at the right end of the propylene injector main body, a second injection nozzle (b10) is provided in the right inner cavity of the propylene injector main body, a second injection diffusion chamber (b3) is provided in the left inner cavity of the propylene injector main body, and the left end of the propylene injector main body is connected to the second mixer main body (b6).

[0006] Preferably, a mixer right flange (a4) and a mixer left flange (a7) are respectively installed at both ends of the first mixer body (a6), and a mixer (a5) is installed in the middle inner cavity of the first mixer body (a6).

[0007] Preferably, at least one set of first distance rings (a8) is installed on both sides of the mixer (a5).

[0008] Preferably, a propylene mixer right flange (b4) and a propylene mixer left flange (b7) are respectively installed at both ends of the second mixer body (b6), and a propylene mixer (b5) is installed in the middle inner cavity of the second mixer body (b6).

[0009] Preferably, at least one set of second distance rings (b8) is installed on both sides of the propylene mixer (b5).

[0010] Preferably, the mixer (a5) comprises a cylindrical body (a5.1), a central channel (a5.2) and auxiliary adjustment channels (a5.3), wherein the cylindrical body (a5.1) is provided with a central channel (a5.2) in the axial direction, and one or more auxiliary adjustment channels (a5.3) are provided in the circumferential direction of the central channel (a5.2).

[0011] Preferably, a nameplate (b9) is installed on the outer wall of the propylene mixer (b5).

[0012] Preferably, a connecting pipe right flange (c1) and a connecting pipe left flange (c2) are respectively installed at both ends of the connecting pipe (c).

[0013] The beneficial effects of the utility model are as follows: the utility model allows process water to enter the first injection nozzle along the right end of the chlorine injector and be injected, gaseous chlorine enters the inner cavity through the chlorine joint and is mixed with the process water injected from the first injection nozzle, and then is mixed and reacted along the first injection diffusion chamber, and then is better mixed and reacted by the mixer in the first mixer body to generate hydrochloric acid and hypochlorous acid solution, and then enters the propylene injector along the connecting pipe; gaseous propylene enters through the propylene joint of the propylene injector and is mixed and reacted with the hypochlorous acid solution injected from the second injection nozzle, and then is decelerated along the second injection diffusion chamber, and then is mixed and reacted more evenly by the propylene mixer, thereby avoiding direct contact between chlorine and propylene, reducing the generation of dichloropropane, reducing the side reactions of the chlorohydrinization system, effectively improving the utilization rate of propylene, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a structural diagram of the mixer;

[0016] In the figure above: chlorine injector a, propylene injector b, connecting pipe c, first flange a1, chlorine joint a2, first spray diffusion chamber a3, mixer right flange a4, mixer a5, first mixer body a6, mixer left flange a7, first distance ring a8, first injection nozzle a9, second flange b1, propylene joint b2, second spray diffusion chamber b3, propylene mixer right flange b4, propylene mixer b5, second outer shell b6, propylene mixer left flange b7, second distance ring b8, nameplate b9, second injection nozzle b10, connecting pipe right flange c1, connecting pipe left flange c2, cylindrical body a5.1, central channel a5.2 and auxiliary adjustment channel a5.3. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0018] Example 1, with reference to Figure 1The utility model mentions a chlorohydrin reaction injection device for propylene oxide production, comprising a chlorine injector a, a propylene injector b, and a connecting pipe c. The chlorine injector a is connected to the propylene injector b via the connecting pipe c. The chlorine injector a comprises a chlorine injector body and a first mixer body a6. A chlorine connector a2 is provided on the upper side of the chlorine injector body, a first flange a1 is provided at the right end of the chlorine injector body, a first injection nozzle a9 is provided in the right inner cavity of the chlorine injector body, and a bell mouth is provided in the left inner cavity of the chlorine injector body. shaped first injection diffusion chamber a3, the left end of the chlorine injector body is connected to the first mixer body a6; the propylene injector b includes a propylene injector body and a second mixer body, a propylene joint b2 is provided on the upper side of the propylene injector body, a second flange b1 is provided at the right end of the propylene injector body, a second injection nozzle b10 is provided in the right inner cavity of the propylene injector body, a trumpet-shaped second injection diffusion chamber b3 is provided in the left inner cavity of the propylene injector body, and the left end of the propylene injector body is connected to the second mixer body b6.

[0019] A mixer right flange a4 and a mixer left flange a7 are respectively installed at both ends of the first mixer body a6, and a mixer a5 is installed in the middle inner cavity of the first mixer body a6.

[0020] One or more first distance rings a8 are respectively installed on both sides of the mixer a5. By installing the first distance rings a8, the installation position and spacing of the mixer a5 can be effectively controlled.

[0021] Reference Figure 2 The mixer a5 mentioned in this utility model comprises a cylindrical body a5.1, a central channel a5.2, and auxiliary regulating channels a5.3. The cylindrical body a5.1 is provided with a central channel a5.2 axially, and one or more auxiliary regulating channels a5.3 are provided circumferentially around the central channel a5.2. Liquid passing through the central channel a5.2 and the auxiliary regulating channels a5.3 of the mixer a5 is disturbed and agitated, thereby achieving a more uniform mixing reaction. The structure of the propylene mixer b5 is identical to that of the mixer a5 and will not be described in detail.

[0022] In addition, a propylene mixer right flange b4 and a propylene mixer left flange b7 are respectively installed at both ends of the second mixer body b6, and a propylene mixer b5 is installed in the middle inner cavity of the second mixer body b6.

[0023] One or more second distance rings b8 are respectively installed on both sides of the propylene mixer b5. By installing the second distance rings b8, the installation position and spacing of the propylene mixer b5 can be effectively controlled.

[0024] A nameplate b9 is installed on the outer wall of the propylene mixer b5.

[0025] A right flange c1 and a left flange c2 are installed on both ends of the connecting pipe c.

[0026] When the utility model is used,

[0027] After the process water is heat-exchanged in the heat exchanger, it is controlled by a regulating valve to fill the tubular reactor, the chlorohydrinization tower and other equipment with water, and the circulation pump is started. The process water enters the first injection nozzle a9 along the first flange a1 of the chlorine injector a, and the gaseous chlorine enters through the chlorine joint a2 and mixes with the process water ejected from the first injection nozzle a9, and then mixes and reacts along the first injection diffusion chamber a3, and then passes through the mixer a5 in the first mixer body a6 to achieve a better mixing reaction to generate hydrochloric acid and hypochlorous acid solution, and then enters the propylene injector b along the connecting pipe c; the gaseous propylene enters through the propylene joint b2 of the propylene injector b and mixes and reacts with the hypochlorous acid solution ejected from the second injection nozzle b10, and then decelerates along the second injection diffusion chamber b3, and then passes through the propylene mixer b5 to achieve a more uniform mixing reaction, thereby avoiding direct contact between chlorine and propylene, reducing the generation of dichloropropane, and lowering the side reactions of the chlorohydrinization system, which can effectively improve the utilization rate of propylene.

[0028] Example 2, the utility model mentioned a chlorohydrin reaction injection device for propylene oxide production, including a chlorine injector a, a propylene injector b, and a connecting pipe c, wherein the chlorine injector a is connected to the propylene injector b through the connecting pipe c, the chlorine injector a includes a chlorine injector body and a first mixer body a6, a chlorine connector a2 is provided on the upper side of the chlorine injector body, a first flange a1 is provided on the right end of the chlorine injector body, a first injection nozzle a9 is provided on the right inner cavity of the chlorine injector body, and a first nozzle a9 is provided on the left side of the chlorine injector body. A first injection diffusion chamber a3 is provided in the side inner cavity, and the left end of the chlorine injector body is connected to the first mixer body a6; the propylene injector b includes a propylene injector body and a second mixer body, a propylene joint b2 is provided on the upper side of the propylene injector body, a second flange b1 is provided at the right end of the propylene injector body, a second injection nozzle b10 is provided in the right inner cavity of the propylene injector body, and a second injection diffusion chamber b3 is provided in the left inner cavity of the propylene injector body, and the left end of the propylene injector body is connected to the second mixer body b6.

[0029] The difference from Example 1 is:

[0030] The central channel a5.2 and auxiliary regulating channel a5.3 of mixer a5 in this embodiment can be formed as spiral holes. A clearance exists between the outer wall of mixer a5 and the inner wall of the first mixer body a6, enabling mixer a5 to rotate and achieve a better mixing reaction. Similarly, the structure of propylene mixer b5 is similar to that of mixer a5 and will not be described in detail here. Of course, the outer wall of mixer a5 can be equipped with rolling bearings to further enhance the rotation of mixer a5.

[0031] The above description is merely a preferred embodiment of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or create equivalent technical solutions. Therefore, any simple modifications or equivalent transformations based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A chlorohydrin reaction spraying device for producing propylene oxide, characterized in that: The invention comprises a chlorine injector (a), a propylene injector (b), and a connecting pipe (c), wherein the chlorine injector (a) is connected to the propylene injector (b) via the connecting pipe (c), the chlorine injector (a) comprises a chlorine injector body and a first mixer body (a6), a chlorine joint (a2) is provided on the upper side of the chlorine injector body, a first flange (a1) is provided at the right end of the chlorine injector body, a first injection nozzle (a9) is provided in the right inner cavity of the chlorine injector body, and a first injection diffusion chamber is provided in the left inner cavity of the chlorine injector body. (a3), the left end of the chlorine injector body is connected to the first mixer body (a6); the propylene injector (b) includes a propylene injector body and a second mixer body, a propylene joint (b2) is provided on the upper side of the propylene injector body, a second flange (b1) is provided at the right end of the propylene injector body, a second injection nozzle (b10) is provided in the right inner cavity of the propylene injector body, and a second injection diffusion chamber (b3) is provided in the left inner cavity of the propylene injector body, and the left end of the propylene injector body is connected to the second mixer body (b6).

2. The propylene oxide production according to claim 1 is characterized in that: A mixer right flange (a4) and a mixer left flange (a7) are respectively installed at both ends of the first mixer body (a6), and a mixer (a5) is installed in the middle inner cavity of the first mixer body (a6).

3. The propylene oxide production according to claim 2 is characterized in that: One or more first distance rings (a8) are respectively installed on both sides of the mixer (a5).

4. The propylene oxide production according to claim 3 is characterized in that: A propylene mixer right flange (b4) and a propylene mixer left flange (b7) are respectively installed at both ends of the second mixer body (b6), and a propylene mixer (b5) is installed in the middle inner cavity of the second mixer body (b6).

5. The propylene oxide production according to claim 4 is characterized in that: One or more second distance rings (b8) are respectively installed on both sides of the propylene mixer (b5).

6. The chlorohydrin reaction injection device for producing propylene oxide according to claim 5, wherein: The mixer (a5) comprises a cylindrical body (a5.1), a central channel (a5.2) and auxiliary adjustment channels (a5.3). The cylindrical body (a5.1) is provided with a central channel (a5.2) in the axial direction, and one or more auxiliary adjustment channels (a5.3) are provided in the circumferential direction of the central channel (a5.2).

7. The chlorohydrin reaction injection device for producing propylene oxide according to claim 6, wherein: A nameplate (b9) is installed on the outer wall of the propylene mixer (b5).

8. The chlorohydrin reaction injection device for producing propylene oxide according to claim 1, wherein: A connecting pipe right flange (c1) and a connecting pipe left flange (c2) are respectively installed at both ends of the connecting pipe (c).

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