Batch-type reaction kettle feeding exhaust buffer device

Abstract

The utility model relates to the field of auxiliary equipment related to exhaust of reaction kettles, in particular to a batch-type reaction kettle feeding and exhaust buffer device, which is used for being connected with a reaction kettle for use and comprises a gas holder, a piston is arranged in the gas holder and divides an inner cavity of the gas holder into an upper cavity and a lower cavity, and the upper cavity is communicated with the lower cavity. The gas holder is provided with a connecting port I and a connecting port II which are communicated with the upper cavity, the connecting port I is connected with a vacuum pump, the connecting port II is connected with nitrogen, the gas holder is provided with a gas inlet and a drain outlet which are connected with the lower cavity, the gas inlet is connected with a filtering device, and the filtering device is connected with the reaction kettle. According to the utility model, the risk that a gasified solvent overflows from the feeding port is reduced, and the risks of personnel poisoning and fire explosion are avoided; and the blow-down pipe is not directly emptied any more, so that the risk that the solvent overflows into the air to pollute the atmosphere and fires and explodes is avoided, the solvent loss is also reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary equipment related to exhaust of reactors, in particular to an intermittent reactor feeding exhaust buffer device. Background Art

[0002] The production process of cellulose ether in the reactor is an intermittent reaction. Before each reaction, the solvent must be injected first, and then sodium hydroxide and refined cotton are added in sequence. Refined cotton and sodium hydroxide need to be added manually. Before manual feeding, the vent valve needs to be opened to avoid pressure buildup and to prevent the solvent that has been input from vaporizing and overflowing from the feeding port, causing poisoning or fire and explosion. However, the vent pipe is a direct discharge pipe, which causes environmental pollution and is directly discharged into the atmosphere. Once it comes into contact with an ignition source, it is prone to fire and explosion accidents. Utility Model Content

[0003] In view of the above problems, the utility model provides an intermittent reactor feeding and exhaust buffer device, which solves the problem that the vaporized solvent easily overflows from the feeding port, causing human poisoning and fire hazards.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an intermittent reactor feeding and exhaust buffer device for use in connection with a reactor, the buffer device comprising a gas cabinet, a piston being provided in the gas cabinet, the piston dividing the inner cavity of the gas cabinet into an upper cavity and a lower cavity, the gas cabinet being provided with a connection port 1 and a connection port 2 communicating with the upper cavity, the connection port 1 being connected to a vacuum pump, the connection port 2 being connected to nitrogen, the gas cabinet being provided with an air inlet and a sewage outlet connected to the lower cavity, the air inlet being connected to a filter device, and the filter device being connected to the reactor.

[0005] As an optimization, the filtering device includes a filter body and a flushing component for flushing the filter body. The filter body includes an upper connecting pipe connected to the air inlet and a lower connecting pipe connected to the reactor. An umbrella-shaped outer cover that is interconnected and arranged in the outer cover is provided between the upper connecting pipe and the lower connecting pipe.

[0006] As an optimization, the flushing component includes a flushing tank, a connecting pipe and a flushing pipe connected in sequence. The flushing pipe is spiral-shaped and is arranged between the outer cover and the filter cover. The flushing pipe is provided with several evenly distributed nozzles with nozzles facing the filter cover.

[0007] As an optimization, a connecting ring is provided between the outer cover and the bottom surface of the filter cover, and a plurality of evenly distributed water leakage holes are provided on the connecting ring.

[0008] The beneficial effects of the present invention are as follows: the present invention provides an intermittent reactor feeding and exhaust buffer device, which is provided with a gas holder for temporarily storing solvent gas, a piston is provided in the gas holder, the piston can move, and the gas holder is divided into two sealed chambers, the lower chamber is connected to the reactor vent pipe through a pipeline, the upper chamber is connected to the vacuum pump and the nitrogen pipe, and a filter device is added between the gas holder and the reactor to prevent the gas from entering the gas holder during the venting process with the material. A flushing component is added to the filter device to backwash the material attached to the filter device. During the feeding process of this device, since the buffer device is in a slightly negative pressure state, the vaporized solvent will first enter the gas holder, reducing the risk of the vaporized solvent overflowing from the feeding port, avoiding the risk of poisoning of personnel and the risk of fire and explosion; the vent pipe is no longer emptied directly, which also avoids the risk of the solvent spilling into the air to pollute the atmosphere and the risk of fire and explosion, and also reduces the loss of solvent and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0010] Attachment Figure 2 It is a schematic cross-sectional structural diagram of the filter body of the present invention.

[0011] In the figure: 1 gas cabinet, 2 connection port 1, 3 connection port 2, 4 sewage outlet, 5 filter device, 6 filter body, 7 flushing component, 8 upper connecting pipe, 9 lower connecting pipe, 10 outer cover, 11 filter cover, 12 flushing tank, 13 connecting pipe, 14 flushing pipe, 15 connecting ring, 16 leakage port. DETAILED DESCRIPTION

[0012] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0013] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0014] For the convenience of description, if the words "up", "down", "left" and "right" appear in this utility model, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present utility model.

[0015] like Figure 1-2 As shown, an intermittent reactor feeding and exhaust buffer device is used to be connected to the reactor for use, the buffer device includes a gas cabinet 1, a piston is provided in the gas cabinet 1, the piston separates the inner cavity of the gas cabinet 1 into an upper cavity and a lower cavity which are respectively sealed, the gas cabinet 1 is provided with a connection port 1 2 and a connection port 2 3 which are connected to the upper cavity, the connection port 1 2 is connected to a vacuum pump, the connection port 2 3 is connected to nitrogen, the gas cabinet 1 is provided with an air inlet and a sewage outlet 4 connected to the lower cavity, the air inlet is connected to a filter device 5, and the filter device 5 is connected to the reactor.

[0016] The filtering device 5 includes a filter body 6 and a flushing component 7 for flushing the filter body 6. The filter body 6 includes an upper connecting pipe 8 connected to the air inlet and a lower connecting pipe 9 connected to the reactor. An outer cover 10 that is interconnected and umbrella-shaped and a filter cover 11 arranged in the outer cover 10 are provided between the upper connecting pipe 8 and the lower connecting pipe 9. The appearance of the filter cover 11 is the same as that of the outer cover 10.

[0017] The flushing component 7 includes a flushing tank 12, a connecting pipe 13 and a flushing pipe 14 connected in sequence. The flushing pipe 14 is spiral and is arranged from top to bottom between the outer cover 10 and the filter cover 11. The flushing pipe 14 is provided with a number of evenly distributed nozzles with nozzles facing the filter cover 11.

[0018] A connecting ring 15 is provided between the bottom surfaces of the outer cover 10 and the filter cover 11 , and a plurality of evenly distributed water leakage holes 16 are provided on the connecting ring 15 .

[0019] When the device is in use, before feeding, the gas cabinet is evacuated through a vacuum pump to move the piston toward the upper cavity, so that a slight negative pressure is formed at the other end, the feeding port of the reactor is opened, and the feeding is done; after the feeding is completed, the feeding port is closed, nitrogen is filled and pressurized through the nitrogen pipe, so that the piston moves toward the lower cavity, and the solvent gas sucked into the gas cabinet 1 is pressed back into the reactor. A filter device 5 is added between the gas cabinet 1 and the reactor to prevent the venting process gas from bringing the material into the gas cabinet 1, and a flushing component 7 is added to the filter device 5 to backwash the material on the filter cover 11 attached to the filter device 5.

[0020] The above-mentioned specific implementation methods are only specific cases of the present utility model. The scope of patent protection of the present utility model includes but is not limited to the product form and style of the above-mentioned specific implementation methods. Any appropriate changes or modifications made to them by ordinary technicians in the relevant technical field that comply with the claims of the present utility model shall fall within the scope of patent protection of the present utility model.

Claims

1. A batch reactor feeding and exhaust buffer device, characterized by: Used in connection with a reactor, the buffer device includes a gas cabinet, a piston is provided in the gas cabinet, the piston divides the inner cavity of the gas cabinet into an upper cavity and a lower cavity, the gas cabinet is provided with a connection port 1 and a connection port 2 connected to the upper cavity, the connection port 1 is connected to a vacuum pump, and the connection port 2 is connected to nitrogen, the gas cabinet is provided with an air inlet and a sewage outlet connected to the lower cavity, the air inlet is connected to a filter device, and the filter device is connected to the reactor.

2. The batch reactor feeding and exhaust buffer device according to claim 1, characterized in that: The filtering device includes a filter body and a flushing component for flushing the filter body. The filter body includes an upper connecting pipe connected to the air inlet and a lower connecting pipe connected to the reactor. An umbrella-shaped outer cover that is interconnected and arranged in the outer cover is provided between the upper connecting pipe and the lower connecting pipe.

3. The batch reactor feeding and exhaust buffer device according to claim 2, characterized in that: The flushing component includes a flushing tank, a connecting pipe and a flushing pipe connected in sequence. The flushing pipe is spiral and is arranged between the outer cover and the filter cover. The flushing pipe is provided with a plurality of nozzles evenly distributed and with nozzles facing the filter cover.

4. The batch reactor feeding and exhaust buffer device according to claim 3, characterized in that: A connecting ring is provided between the outer cover and the bottom surface of the filter cover, and a plurality of evenly distributed water leakage holes are provided on the connecting ring.

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