Safe chlorine introducing device for reaction kettle

Abstract

The utility model discloses a safe chlorine introducing device for a reaction kettle, which comprises a nitrogen buffer tank and a liquid chlorine metering tank, the liquid chlorine metering tank is connected to the reaction kettle through a discharge pipe, and a discharge valve is arranged on the discharge pipe; comprising a liquid chlorine steel cylinder, a material supplementing pipe is arranged between the liquid chlorine steel cylinder and the liquid chlorine metering tank, and a first valve, a second valve and a third valve are sequentially arranged on the material supplementing pipe; comprising a chlorine absorption tower, a recovery pipe is arranged between the chlorine absorption tower and the liquid chlorine metering tank, a fourth valve and a fifth valve are sequentially arranged on the recovery pipe, and the fourth valve is close to the liquid chlorine metering tank; an inlet pipeline is arranged between the nitrogen buffer tank and the liquid chlorine metering tank, and an inlet valve is arranged on the inlet pipeline. The device is simple in structure, can realize the operation of introducing chlorine into the reaction kettle in the production process of difluoromethane, and is high in safety coefficient.

Description

Technical Field

[0001] The utility model relates to the technical field of difluoromethane manufacturing equipment, in particular to a safe chlorine-passing device for a reaction kettle. Background Art

[0002] Difluoromethane is a refrigerant with zero ozone depletion potential. Difluoromethane and pentafluoroethane can form a constant boiling mixture (called R-410A), which is used as a substitute for chlorofluorocarbons (also known as Freon) in new refrigerant systems, mainly replacing HCFC-22 as a compound medium and low temperature mixed refrigerant. Although it has zero ozone depletion potential, it has a high global warming potential, which is 550 times that of carbon dioxide on a 100-year basis.

[0003] In the production process of difluoromethane, chlorine gas needs to be introduced into the reactor to realize the overall reaction process. The general device has a low safety factor, cannot monitor and control the pipeline in real time, and has poor use effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a safe chlorine-passing device for a reactor, which has a simple structure and can realize the operation of passing chlorine to the reactor during the production process of difluoromethane, and has a high safety factor.

[0005] In order to solve the above technical problems, the utility model provides a safe chlorine-passing device for a reactor, characterized in that it comprises a nitrogen buffer tank and a liquid chlorine metering tank, the liquid chlorine metering tank is connected to the reactor through a discharge pipe, and a discharge valve is arranged on the discharge pipe; it comprises a liquid chlorine cylinder, a feeding pipe is arranged between the liquid chlorine metering tank, and a first valve, a second valve, and a third valve are arranged on the feeding pipe in sequence; it comprises a chlorine absorption tower, a recovery pipe is arranged between the liquid chlorine metering tank, a fourth valve and a fifth valve are arranged on the recovery pipe in sequence, and the fourth valve is close to the liquid chlorine metering tank; an inlet pipe is arranged between the nitrogen buffer tank and the liquid chlorine metering tank, and an inlet valve is arranged on the inlet pipe.

[0006] Furthermore, an air pressurizing component is provided on the nitrogen buffer tank.

[0007] Furthermore, the liquid chlorine metering tank is provided with a channel connected to the emergency washing tower, and the channel is provided with a third pressure gauge.

[0008] Furthermore, a first pressure gauge is provided on the nitrogen buffer tank.

[0009] Furthermore, a second pressure gauge is provided on the inlet pipeline.

[0010] Furthermore, a pressure transmitter (20) is provided on the channel to chain the pressure in the reactor. When the pressure in the reactor is greater than the pressure indicated by the pressure transmitter (20), the shut-off valve on the discharge pipe (8) is closed.

[0011] The beneficial effects of the utility model are as follows: the device has a simple structure and can realize the operation of passing chlorine into the reaction kettle during the production process of difluoromethane, and has a high safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Explanation of the numbers in the figure: 1. First valve; 2. Second valve; 3. Third valve; 4. Fourth valve; 5. Fifth valve; 6. Nitrogen buffer tank; 7. Liquid chlorine metering tank; 8. Discharge pipe; 9. Discharge valve; 10. Liquid chlorine cylinder; 11. Feed pipe; 12. Chlorine absorption tower; 13. Recovery pipe; 14. Inlet pipeline; 15. Inlet valve; 16. Air booster assembly; 17. Third pressure gauge; 18. First pressure gauge; 19. Second pressure gauge; 20. Pressure transmitter. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0015] 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", "axial", "radial", "circumferential" 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.

[0016] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0017] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0020] Reference Figure 1 As shown, an embodiment of a safe chlorine-passing device for a reactor of the utility model comprises a nitrogen buffer tank 6 and a liquid chlorine metering tank 7, wherein the liquid chlorine metering tank 7 is connected to the reactor through a discharge pipe 8, and a discharge valve 9 is arranged on the discharge pipe 8; a liquid chlorine cylinder 10 is comprised, a feeding pipe 11 is arranged between the liquid chlorine metering tank 7, and a first valve 1, a second valve 2, and a third valve 3 are arranged on the feeding pipe 11 in sequence; a chlorine absorption tower 12 is comprised, a recovery pipe 13 is arranged between the liquid chlorine metering tank 7, and a fourth valve 4 and a fifth valve 5 are arranged on the recovery pipe 13 in sequence, and the fourth valve 4 is close to the liquid chlorine metering tank 7; an inlet pipe 14 is arranged between the nitrogen buffer tank 6 and the liquid chlorine metering tank 7, and an inlet valve 15 is arranged on the inlet pipe 14; an air boosting component 16 is arranged on the nitrogen buffer tank 6.

[0021] The use process is as follows: (1) close the discharge valve 9 of the liquid chlorine metering tank 7;

[0022] (2) Close the nitrogen inlet valve 15;

[0023] (3) Open the fourth valve 4 and the fifth valve 5 in sequence, release the pressure from the liquid chlorine metering tank 7 to the chlorine absorption tower 12, and release the pressure to 0. After the pressure release is completed, close the fourth valve 4 and the fifth valve 5;

[0024] (4) Open the first valve 1, the second valve 2, and the third valve 3 from the liquid chlorine cylinder 10 to the liquid chlorine metering tank 7 in sequence to refill the liquid chlorine metering tank 7 (not to exceed 100 kg). After the refilling is completed, close the first valve 1, the second valve 2, and the third valve 3;

[0025] (5) Open the nitrogen inlet valve 15 to pressurize the liquid chlorine metering tank 7 (the valve is not closed);

[0026] (6) Open the discharge valve 9 of the liquid chlorine metering tank 7 to allow chlorine to flow normally.

[0027] The liquid chlorine metering tank 7 is provided with a channel connected to the emergency washing tower, and the channel is provided with a third pressure gauge 17, the nitrogen buffer tank 6 is provided with a first pressure gauge 18, and the inlet pipe 14 is provided with a second pressure gauge 19, all of which can reflect the pressure conditions in the pipeline in real time. At the same time, a pressure transmitter 20 is provided on the channel to chain the pressure in the reactor. When the pressure in the reactor is greater than the pressure indicated by the pressure transmitter 20, the shut-off valve on the discharge pipe 8 is closed.

[0028] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A safe chlorine-passing device for a reactor, characterized in that: It comprises a nitrogen buffer tank (6) and a liquid chlorine metering tank (7), wherein the liquid chlorine metering tank (7) is connected to the reaction kettle via a discharge pipe (8), and a discharge valve (9) is provided on the discharge pipe (8); It comprises a liquid chlorine steel cylinder (10), a feeding pipe (11) is arranged between the liquid chlorine metering tank (7), and a first valve (1), a second valve (2), and a third valve (3) are arranged in sequence on the feeding pipe (11); It comprises a chlorine absorption tower (12), a recovery pipe (13) is arranged between the tower and the liquid chlorine metering tank (7), a fourth valve (4) and a fifth valve (5) are arranged in sequence on the recovery pipe (13), and the fourth valve (4) is close to the liquid chlorine metering tank (7); An inlet pipe (14) is provided between the nitrogen buffer tank (6) and the liquid chlorine metering tank (7), and an inlet valve (15) is provided on the inlet pipe (14).

2. The safe chlorine-passing device for a reactor as claimed in claim 1, characterized in that: The nitrogen buffer tank (6) is provided with an air pressurizing component (16).

3. The safe chlorine-passing device for a reactor as claimed in claim 1, characterized in that: The liquid chlorine metering tank (7) is provided with a channel connected to the emergency washing tower, and the channel is provided with a third pressure gauge (17).

4. The safe chlorine-passing device for a reactor as claimed in claim 1, characterized in that: The nitrogen buffer tank (6) is provided with a first pressure gauge (18).

5. The safe chlorine-passing device for a reactor as claimed in claim 1, characterized in that: The inlet pipe (14) is provided with a second pressure gauge (19).

6. The safe chlorine-passing device for a reactor as claimed in claim 3, characterized in that: The channel is provided with a pressure transmitter (20) to chain the pressure in the reactor. When the pressure in the reactor is greater than the pressure indicated by the pressure transmitter (20), the shut-off valve on the discharge pipe (8) is closed.

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