Chlorine buffer tank for preventing accumulation of nitrogen trichloride

Abstract

In order to solve the problem that nitrogen trichloride is accumulated in the chlorine buffer tank, the chlorine buffer tank capable of preventing nitrogen trichloride from being accumulated comprises a buffer tank body, the upper end of the buffer tank body is connected with an air inlet pipe, an exhaust pipe and a pressure gauge, and the lower portion of the buffer tank body is connected with a blow-off pipe; the inner extending pipe is located on one side of the interior of the buffer tank body and is distributed in the vertical direction, and the upper end of the inner extending pipe is connected with the exhaust pipe; the inclined pipe and the inner extending pipe are arranged in an inclined mode, one end of the inclined pipe is connected with the inner extending pipe, and the other end of the inclined pipe is located over an inlet of the blow-off pipe; the liquid level meter is used for detecting the liquid level height in the buffer tank, chlorine is introduced to the position above the lowest point of the bottom of the chlorine buffer tank body through the inner extending pipe and the inclined pipe, the disturbance effect of the chlorine on liquid chlorine at the bottom of the buffer tank body is further improved through inclined arrangement of the inclined pipe, and therefore residual accumulation of the liquid chlorine is reduced; and the safety risk of nitrogen trichloride is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a chlorine buffer tank for preventing nitrogen trichloride from accumulating. Background Art

[0002] At present, in the process of producing polycarbonate by the phosgene method, the highly toxic chemical liquid chlorine needs to be gasified and then passed through a buffer tank before entering the subsequent reaction process. Analysis shows that nitrogen trichloride exists in this buffer tank, which mainly comes from the raw liquid chlorine. Nitrogen trichloride is easily retained in the liquid at the bottom of the tank and cannot be discharged with the gaseous chlorine. Nitrogen trichloride is very sensitive to heat, vibration, impact, and friction, and is very easy to decompose and explode. There is a safety risk after accumulation. Nitrogen trichloride is highly irritating to the respiratory tract, eyes, and skin, and its emission and dispersion may cause safety risks. Therefore, avoiding the accumulation of nitrogen trichloride is of great significance to eliminating the safety risks after the accumulation of nitrogen trichloride. Utility Model Content

[0003] In order to solve the problem of nitrogen trichloride accumulation inside the chlorine buffer tank, the utility model provides a chlorine buffer tank that prevents nitrogen trichloride accumulation, and the technical solution adopted is as follows:

[0004] A chlorine buffer tank for preventing nitrogen trichloride accumulation, characterized in that it comprises:

[0005] A buffer tank body, wherein the upper end of the buffer tank body is connected to an air inlet pipe, an exhaust pipe and a pressure gauge, and the lower end of the buffer tank body is connected to a sewage pipe;

[0006] An inner extension pipe, the inner extension pipe is located at one side of the buffer tank body, the inner extension pipe is distributed in a vertical direction and the upper end of the inner extension pipe is connected to the exhaust pipe;

[0007] An inclined pipe, wherein the inclined pipe is arranged obliquely with respect to the inner extension pipe, and one end of the inclined pipe is connected to the inner extension pipe, and the other end of the inclined pipe is located directly above the inlet of the sewage pipe;

[0008] Liquid level gauge, used to detect the liquid level in the buffer tank.

[0009] Furthermore, the lower end of the inclined tube is inclined inwardly at an angle of 30° to 60°.

[0010] Furthermore, the inner extension pipe is fixedly connected to the inner wall of the buffer tank via a connecting rod.

[0011] Furthermore, the liquid level gauge is an external liquid level gauge.

[0012] Furthermore, a controller and an alarm are included, and the liquid level meter and the alarm are connected to the signal input end and the signal output end of the controller respectively.

[0013] Furthermore, a first switch valve is provided on the sewage pipe, and the first switch valve is a solenoid valve and is connected to the signal output end of the controller.

[0014] Furthermore, a heating pipe is wound around the outer surface of the sewage pipe.

[0015] Furthermore, a sampling tube is connected below the buffer tank, and a second switch valve is provided on the sampling tube.

[0016] Furthermore, a reserved pipe is arranged above the buffer tank body.

[0017] The beneficial effects of the utility model are:

[0018] 1. The chlorine gas inlet pipe extends to the position just above the center of the sewage pipe through the inner extension pipe and the inclined pipe, and the chlorine gas is directly introduced into the upper part of the lowest point of the bottom of the chlorine buffer tank. When the chlorine gas is introduced, the liquid chlorine that may be retained at the bottom is disturbed. In addition, the inclined angle between the inclined pipe and the inner extension pipe can better improve the disturbance effect and further reduce the liquid chlorine that may be retained at the bottom of the buffer tank body.

[0019] 2. Set up a liquid level meter, controller and alarm to detect the liquid level inside the buffer tank. When the liquid level is higher than the preset maximum threshold or lower than the preset minimum threshold, the alarm prompts the operator to take treatment measures, which can effectively control the frequency of sewage discharge and reduce the risk of sewage discharge;

[0020] 3. The use of external liquid level gauge can reduce the number of openings on the wall of the buffer tank body and avoid the creation of new leakage risk points;

[0021] 4. Installing a heating pipe on the sewage pipe can ensure that no liquid chlorine accumulates in the sewage pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the utility model

[0023] Among them, 1-buffer tank body, 2-inlet pipe, 3-exhaust pipe, 4-reserved pipe, 5-inner extension pipe, 6-inclined pipe, 7-connecting rod, 8-drain pipe, 9-sampling tube, 10-liquid level meter, 11-controller, 12-alarm, 13-first switch valve, 14-second switch valve, 15-pressure gauge, 16-heating tube. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0025] In the description of the utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the viewing direction or position relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0026] like Figure 1 A chlorine buffer tank for preventing nitrogen trichloride accumulation is shown, comprising a buffer tank body 1, an air inlet pipe 2 and an exhaust pipe 3 connected to the interior are arranged above the buffer tank body 1, a sewage pipe 8 is connected to the middle position of the lower end, an inner extension pipe 5 is arranged inside the buffer tank body 1, the inner extension pipe 5 is vertically distributed close to the inner wall of the buffer tank body 1, the upper end of the inner extension pipe 5 is connected to the exhaust pipe 3, and the lower end extends downward to the lower part of the buffer tank body 1, an inclined pipe 6 is connected below the inner extension pipe 5, and a liquid level meter 10 is also arranged at the lower part of the buffer tank body 1.

[0027] More specifically, in this embodiment, if Figure 1 As shown, the upper end of the inclined tube 6 is connected to the lower end of the inner extension tube 5, the lower end of the inclined tube 6 is inclined inwardly at 45° and the lower end is located directly above the sewage pipe 8. The chlorine gas passes through the air inlet pipe 2, the inner extension tube 5 and the inclined tube 6 in sequence and enters the bottom end of the buffer tank body 1. The chlorine gas can be introduced above the lowest point of the bottom of the buffer tank body 1. While the chlorine gas is introduced, the liquid chlorine that may remain at the bottom is disturbed. By setting the inclined tube 6, the disturbance effect can be further improved, thereby reducing the liquid chlorine remaining at the bottom of the buffer tank body 1.

[0028] A heating pipe 16 is wound around the surface of the sewage pipe 8. Liquid chlorine may accumulate in the sewage pipe 8 during the sewage discharge process. Adding the heating pipe 16 to the sewage pipe 8 can ensure that no liquid chlorine accumulates in the sewage pipeline.

[0029] In addition, the device also includes a controller 11 and an alarm 12. Two groups of reserved tubes 4 and a group of pressure gauges 15 are connected to the buffer tank body 1. A sampling tube 9 is connected to the bottom of the buffer tank body 1. The sewage pipe 8 and the sampling tube 9 are respectively provided with a first switch valve 13 and a second switch valve 14. The first switch valve 13 is a solenoid valve. The liquid level meter 10 is connected to the signal input end of the controller 11. The first switch valve 13 and the alarm 12 are connected to the signal output end of the controller 11. The controller 11 is preset with a minimum liquid level threshold and a maximum liquid level threshold. When it is detected that the internal liquid level of the buffer tank body 1 is lower than the minimum liquid level threshold, the controller 11 controls the alarm 12 to send an alarm signal to remind the operator to take treatment measures. When it is detected that the internal liquid level of the buffer tank body 1 exceeds the preset maximum liquid level threshold, the controller 11 controls the alarm 12 to send an alarm signal and controls the first switch valve 13 to open, and the sewage pipe 8 discharges sewage, thereby effectively controlling the frequency of sewage discharge and reducing the risk of sewage discharge.

[0030] In this embodiment, the liquid level meter 10 is an external liquid level meter to reduce the number of openings on the wall of the buffer tank body 1 and avoid the generation of new leakage risk points.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A chlorine buffer tank for preventing nitrogen trichloride accumulation, characterized in that: include: A buffer tank body, wherein the upper end of the buffer tank body is connected to an air inlet pipe, an exhaust pipe and a pressure gauge, and the lower end of the buffer tank body is connected to a sewage pipe; An inner extension pipe, the inner extension pipe is located at one side of the buffer tank body, the inner extension pipe is distributed in a vertical direction and the upper end of the inner extension pipe is connected to the exhaust pipe; An inclined pipe, wherein the inclined pipe is arranged obliquely with respect to the inner extension pipe, and one end of the inclined pipe is connected to the inner extension pipe, and the other end of the inclined pipe is located directly above the inlet of the sewage pipe; Liquid level gauge, used to detect the liquid level in the buffer tank.

2. The chlorine buffer tank for preventing nitrogen trichloride accumulation according to claim 1, characterized in that: The lower end of the inclined tube is inclined inwardly at an angle of 30° to 60°.

3. The chlorine buffer tank for preventing nitrogen trichloride accumulation according to claim 1, characterized in that: The inner extension pipe is fixedly connected to the inner wall of the buffer tank via a connecting rod.

4. The chlorine buffer tank for preventing nitrogen trichloride accumulation according to claim 1, characterized in that: The liquid level gauge is an external liquid level gauge.

5. The chlorine buffer tank for preventing nitrogen trichloride accumulation according to claim 1, characterized in that: The device also includes a controller and an alarm, wherein the liquid level meter and the alarm are respectively connected to the signal input end and the signal output end of the controller.

6. The chlorine buffer tank for preventing nitrogen trichloride accumulation according to claim 5, characterized in that: The sewage pipe is provided with a first switch valve, which is a solenoid valve and is connected to the signal output end of the controller.

7. The chlorine buffer tank for preventing nitrogen trichloride accumulation according to claim 1 or 6, characterized in that: A heating pipe is wound around the outer surface of the sewage pipe.

8. The chlorine buffer tank for preventing nitrogen trichloride accumulation according to claim 1, characterized in that: A sampling tube is also connected below the buffer tank, and a second switch valve is arranged on the sampling tube.

9. The chlorine buffer tank for preventing nitrogen trichloride accumulation according to claim 1, characterized in that: A reserved pipe is also arranged above the buffer tank body.

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