Temperature control device of ethylene oxide using tank

Abstract

The utility model discloses a temperature control device of an ethylene oxide using tank, which belongs to the technical field of cellulose ether production and comprises the ethylene oxide using tank, a cold insulation jacket is sleeved outside the ethylene oxide using tank, a cold water inlet is arranged on the lower portion of the cold insulation jacket, and a cold water outlet is arranged on the upper portion of the cold insulation jacket. The device further comprises a water supply system and a plurality of special anti-explosion temperature sensing probes, the water supply system is provided with an ice maker refrigerating device and connected with the cold water inlet through a pipeline, and the special anti-explosion temperature sensing probes are arranged in the ethylene oxide using tank, the cold water inlet of the cold insulation jacket and the cold water outlet of the cold insulation jacket respectively. And the plurality of special explosion-proof temperature sensing probes are electrically connected with the ice maker refrigeration device. The utility model solves the technical problem that the internal pressure and temperature of the ethylene oxide using tank cannot be adjusted by the existing device.

Description

Technical Field

[0001] This utility model relates to the field of cellulose ether production technology, and in particular to a temperature control device for an ethylene oxide utilization tank. Background Technology

[0002] Ethylene oxide, also known as ethylene oxide, is a gas at room temperature and pressure. It is a toxic, flammable, and explosive organic chemical. Below 10.7°C, ethylene oxide is a colorless, easily flowing liquid.

[0003] Since the production process of cellulose ether is a batch-type intermittent reaction, gaseous ethylene oxide is transported from the storage tank to the on-site ethylene oxide use tank via nitrogen. Ethylene oxide is added to the reactor only when the batch reaction requires it. Therefore, the ethylene oxide use tank is used to temporarily store ethylene oxide.

[0004] In existing technology, the exterior of the ethylene oxide tank is insulated with rock wool to maintain the gaseous state of the ethylene oxide. While the temperature and pressure inside the tank can be controlled during low winter temperatures, they become less effective as temperatures rise. This is due to increased external temperatures or equipment malfunctions that temporarily prevent the addition of ethylene oxide from the tank to the reactor, leading to increased temperature and pressure within the tank. For safety reasons, the tank is vented to maintain stable pressure. The vented gaseous ethylene oxide is then treated in an acidic water washing tank, which wastes ethylene oxide, increases water treatment costs, and poses certain safety risks. Utility Model Content

[0005] To address the technical problem that existing devices cannot adjust the internal pressure and temperature of ethylene oxide tanks, this invention provides a temperature control device for ethylene oxide tanks that can adjust the internal pressure and temperature.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] The temperature control device for an ethylene oxide tank includes an ethylene oxide tank, which is externally fitted with a cold insulation jacket. The cold insulation jacket has a cold water inlet at the bottom and a cold water outlet at the top. It also includes a water supply system and multiple explosion-proof temperature sensors. The water supply system is equipped with an ice machine refrigeration device. The water supply system is connected to the cold water inlet through a pipeline. The explosion-proof temperature sensors are respectively installed inside the ethylene oxide tank, at the cold water inlet of the cold insulation jacket, and at the cold water outlet of the cold insulation jacket. All the explosion-proof temperature sensors are electrically connected to the ice machine refrigeration device.

[0008] Furthermore, a spray pipe is installed at the top of the ethylene oxide tank, and the spray pipe is arranged horizontally around a vertical line, so that the vertical projection of the ethylene oxide tank on the horizontal plane falls completely within the range of the outermost spray pipe.

[0009] Furthermore, from the bottom to the top of the ethylene oxide tank, multiple spiral spray pipes are arranged around the outside of the ethylene oxide tank.

[0010] Furthermore, the spray pipe is equipped with spray heads and also includes a cooling tower system, with the spray pipe connected to the cooling tower system via pipelines.

[0011] Furthermore, the ethylene oxide tank is equipped with multiple combustible gas detectors on its exterior, and pneumatic valves are installed on the connecting pipes between the spray pipes and the cooling tower system. The system also includes a controller, which is electrically connected to the multiple combustible gas detectors, the cooling tower system, and the pneumatic valves.

[0012] Furthermore, the cooling jacket is made of stainless steel.

[0013] The beneficial effects of this utility model are:

[0014] This solution employs a cooling jacket system, with a water supply system providing cooling water to the jacket. Explosion-proof temperature sensors are installed inside the ethylene oxide tank, at the cooling water inlet and outlet of the cooling jacket, and are electrically connected to the refrigeration unit. These sensors measure the cooling water temperature inside the cooling jacket and the temperature inside the ethylene oxide tank in real time. When the temperature exceeds the desired value, the refrigeration unit activates its cooling function, providing low-temperature cooling water to regulate the temperature inside the ethylene oxide tank. After implementing this system, the pressure and temperature of ethylene oxide can be effectively controlled, significantly reducing the frequency of ethylene oxide exhaust, minimizing waste, and ensuring controllable temperature and pressure in the ethylene oxide tank, thus minimizing harm to the environment and personnel. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the temperature control device for the ethylene oxide utilization tank of this utility model;

[0016] Figure 2 This is a top view of the spray pipes installed at the top of the ethylene oxide tank;

[0017] The diagram is labeled as follows: 1-Ethylene oxide tank, 2-Cold insulation jacket, 3-Cold water inlet, 4-Cold water outlet, 5-Water supply system, 6-Explosion-proof temperature sensor, 7-Ice refrigeration unit, 8-Spray pipe, 9-Spray head, 10-Cooling tower system, 11-Combustible gas alarm, 12-Pneumatic valve, 13-Controller. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the present invention will be further described below with reference to the accompanying drawings.

[0019] First, it should be stated that the technical solutions of the embodiments of this application are clearly and completely described. The described embodiments are only some of the embodiments of this application, and not a limitation of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] In the description of this utility model, it should be understood that the terms "first", "second", "upper", "lower", "left", "right", "inner", "outer", "axial" or "radial" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and are not intended to indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0021] It should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation," etc., should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Reference Figures 1 to 2 This utility model provides a temperature control device for an ethylene oxide utilization tank.

[0023] like Figure 1 As shown in the embodiment of this solution, the temperature control device for the ethylene oxide tank includes an ethylene oxide tank 1, an ethylene oxide tank 1 with a cold insulation jacket 2, a cold water inlet 3 at the bottom of the cold insulation jacket 2 and a cold water outlet 4 at the top of the cold insulation jacket 2, a water supply system 5 and multiple explosion-proof temperature sensors 6. The water supply system 5 is equipped with an ice machine refrigeration device 7. The water supply system 5 is connected to the cold water inlet 3 through a pipeline. The explosion-proof temperature sensors 6 are respectively installed inside the ethylene oxide tank 1, at the cold water inlet 3 of the cold insulation jacket 2 and at the cold water outlet 4 of the cold insulation jacket 2. The multiple explosion-proof temperature sensors 6 are all electrically connected to the ice machine refrigeration device 7.

[0024] The lower part of the cold insulation jacket 2 has a cold water inlet 3. One or two cold water inlets 3 can be set at the lower part of the cold insulation jacket 2, and one or two cold water outlets 4 can be set at the upper part of the cold insulation jacket 2. This will increase the cooling water circulation speed in the cold insulation jacket 2 and increase the cooling effect.

[0025] One specific embodiment of this solution is as follows:

[0026] It should be noted that the program used in this embodiment is existing technology. This embodiment does not improve the computer program and should be protected by utility model.

[0027] 1. First, a stainless steel cold insulation jacket 2 of suitable size is custom-made for the outside of the ethylene oxide tank 1. Explosion-proof special temperature sensors 6 are installed on both the cold water inlet 3 and the cold water outlet 4 of the cold insulation jacket 2. The cooling water for the cold insulation jacket 2 is supplied by the water supply system 5 through pipelines at 5°C. The temperature T1 of the cold water inlet 3 and the temperature T2 of the cold water outlet 4 of the cold insulation jacket 2 and the refrigeration unit 7 are sequentially controlled and integrated into the current external program. There is a separate program to monitor the temperature T1 of the cold water inlet 3, the temperature T2 of the cold water outlet 4 and the operation of the refrigeration unit 7.

[0028] When either the temperature T1 of the cold water inlet 3 of the cold insulation jacket 2 or the temperature T2 of the cold water outlet 4 exceeds 20°C, the sequential control program alarms and reminds the DCS operator whether the ice machine refrigeration unit 7 needs to be started.

[0029] When the temperature T1 of the cold water inlet 3 of the cold insulation jacket 2 and the temperature T2 of the cold water outlet 4 meet the set temperature values, and the ice machine refrigeration unit 7 unexpectedly stops running, a pop-up window will remind the DCS operator, who will then notify the on-site operator to check and restart it.

[0030] 2. Then, the internal temperature T3 of the ethylene oxide tank 1 is monitored and configured. When the temperature exceeds the set condition of 20°C, the sequential control program alarms and reminds the DCS operator whether the ice machine cooling device 7 needs to be started for temperature control. By starting the ice machine cooling device 7, the internal temperature T3 of the ethylene oxide tank 1 is controlled between 10°C and 15°C.

[0031] 3. Finally, when ethylene oxide leaks due to overheating and overpressure, the combustible gas alarm 11 will trigger an over-limit alarm. The combustible gas alarm 11 is electrically connected to the controller 13, which is a GDS system. The controller 13 activates the cooling tower system 10 and opens the pneumatic valve 12 of the controlled water supply pipeline. The cooling tower system 10 delivers spray water to the spray pipe 8 and begins to spray water to dilute the ethylene oxide.

[0032] like Figure 1 and Figure 2As shown, in one embodiment of the spray pipe 8, a spray pipe 8 is provided on the top of the ethylene oxide tank 1. The spray pipe 8 is arranged horizontally around a vertical line, and the vertical projection of the ethylene oxide tank 1 on the horizontal plane falls completely within the range of the outermost spray pipe 8.

[0033] like Figure 1 As shown, in another embodiment of the spray pipe 8, a multi-turn spiral arrangement of spray pipe 8 is arranged around the outside of the ethylene oxide usage tank 1 from the bottom to the top.

[0034] The two types of spray pipes 8 described above can be used in combination to fully cover the ethylene oxide tank 1, effectively diluting any leaked ethylene oxide and improving safety.

[0035] like Figure 1 As shown in the embodiment of this solution, the spray pipe 8 is equipped with a spray head 9, and a cooling tower system 10 is also included. The spray pipe 8 and the cooling tower system 10 are connected by a pipeline. In addition to installing spray heads 9 on the spray pipe 8, the aforementioned embodiments can also directly open spray holes on the spray pipe 8 to achieve the spraying purpose. The preferred source of spray water for the spray pipe 8 is provided by the cooling tower system 10. Alternatively, a water supply device can be installed to provide spray water.

[0036] like Figure 1 As shown in the embodiment of this solution, multiple combustible gas detectors 11 are installed outside the ethylene oxide tank 1, and a pneumatic valve 12 is installed on the connecting pipe between the spray pipe 8 and the cooling tower system 10. A controller 13 is also included, which is electrically connected to all the combustible gas detectors 11, the cooling tower system 10, and the pneumatic valve 12. The computer program used by the controller 13 is existing technology, and this embodiment does not include any improvement to the computer program. The controller 13 is used to receive information from the combustible gas detectors 11, thereby controlling the water supply and the start / stop of the electric valves in the cooling tower system 10.

[0037] In this embodiment of the solution, the cold insulation jacket 2 is made of stainless steel.

Claims

1. A temperature control device for an ethylene oxide utilization tank, comprising an ethylene oxide utilization tank (1), characterized in that: The ethylene oxide tank (1) is fitted with a cold insulation jacket (2). The cold insulation jacket (2) has a cold water inlet (3) at the bottom and a cold water outlet (4) at the top. It also includes a water supply system (5) and multiple explosion-proof temperature sensors (6). The water supply system (5) is equipped with an ice machine refrigeration device (7). The water supply system (5) is connected to the cold water inlet (3) through a pipeline. The explosion-proof temperature sensors (6) are respectively installed in the ethylene oxide tank (1), the cold water inlet (3) of the cold insulation jacket (2), and the cold water outlet (4) of the cold insulation jacket (2). The multiple explosion-proof temperature sensors (6) are electrically connected to the ice machine refrigeration device (7).

2. The temperature control device for the ethylene oxide utilization tank as described in claim 1, characterized in that: The top of the ethylene oxide tank (1) is equipped with a spray pipe (8), which is arranged horizontally around a vertical line. The vertical projection of the ethylene oxide tank (1) on the horizontal plane falls completely within the range of the outermost spray pipe (8).

3. The temperature control device for the ethylene oxide utilization tank as described in claim 1, characterized in that: From the bottom to the top of the ethylene oxide tank (1), a spray pipe (8) with multiple spirals is arranged around the outside of the ethylene oxide tank (1).

4. The temperature control device for the ethylene oxide utilization tank as described in claim 2 or 3, characterized in that: The spray pipe (8) is equipped with a spray head (9) and also includes a cooling tower system (10). The spray pipe (8) and the cooling tower system (10) are connected by a pipeline.

5. The temperature control device for the ethylene oxide utilization tank as described in claim 4, characterized in that: The ethylene oxide tank (1) is equipped with multiple combustible gas alarms (11) on its exterior. A pneumatic valve (12) is installed on the connecting pipe between the spray pipe (8) and the cooling tower system (10). The tank also includes a controller (13). The controller (13) is electrically connected to the multiple combustible gas alarms (11), the controller (13) is electrically connected to the cooling tower system (10), and the controller (13) is electrically connected to the pneumatic valve (12).

6. The temperature control device for the ethylene oxide utilization tank as described in claim 1, characterized in that: The cold insulation jacket (2) is made of stainless steel.

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