Volume-variable gas holder

Abstract

The utility model relates to the technical field of gas cabinets, and discloses a variable-volume gas cabinet which comprises a shell, a gas bag, a gas level transmitter, a pressure transmitter, a water seal, an emergency discharge valve and a control system, the air bag is arranged in the shell in a floatable mode and connected with the gas level transmitter, the pressure transmitter and the control system which are arranged in the shell, an air inlet of the air bag is connected with storage tank tail gas through an air inlet pipe, an air outlet of the air bag is connected with the water seal through an exhaust pipe, and the water seal is also connected with the tail gas treatment device through an exhaust pipe. And an emergency discharge valve is arranged on the exhaust pipe. Compared with the prior art, the gas holder with the variable volume has the advantages that the gas holder with the variable volume can be used as a gas collecting device, is mainly used for buffering and collecting intermittent incoming gas and has the function of automatically adjusting the volume.

Description

Technical Field

[0001] The utility model relates to the technical field of gas holders, in particular to a variable-volume gas holder. Background Art

[0002] A gas holder is a container device used to store various industrial gases and also to balance the unevenness of gas consumption. At present, the gas holders in the prior art do not have the function of adjusting the variable volume, resulting in great limitations in their use, poor practicability, and the need for improvement.

[0003] Herein, in order to solve the above problems, we propose a variable-volume gas holder. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the above technical difficulties and provide a variable-volume gas holder, which can be used as a gas collection device. Its main function is to buffer and collect intermittent incoming gas, and it has the function of automatically adjusting the volume.

[0005] To solve the above technical problem, the technical solution provided by the utility model is as follows:

[0006] A variable-volume gas holder includes a housing, an airbag, a gas level transmitter, a pressure transmitter, a water seal, an emergency discharge valve, and a control system; the airbag is floatingly arranged in the housing and is connected to the gas level transmitter, pressure transmitter, and control system arranged in the housing. The air inlet of the airbag is connected to the tail gas of the storage tank through an inlet pipe, the air outlet of the airbag is connected to the water seal through an exhaust pipe, and the water seal is also connected to the tail gas treatment device through an exhaust pipe. An emergency discharge valve is arranged on the exhaust pipe.

[0007] It should be noted that the control system can adopt the existing control system in the prior art. The control system has been widely used in the technical field of gas holders for storing industrial gases. Therefore, it does not involve improvement, let alone the improvement of computer programs and software methods.

[0008] The advantages of the utility model compared with the prior art are as follows:

[0009] 1. Long-term collection and one-time treatment. The gas holder collects the high-concentration VOCs gases scattered and discharged within a certain period of time and conducts one-time treatment when the set height is reached.

[0010] 2. Reduce the volatilization of solvents and reduce the working load of the existing VOCs treatment system. Since the existing VOCs treatment devices all need to draw air through a fan, due to the suction effect of the fan, a large amount of solvents volatilize at each process point. After adding the gas holder, the solvent loss caused by the fan suction can be greatly reduced.

[0011] 3. It can be used in conjunction with a compression device, a condensation device, and a membrane treatment device to make the device work intermittently, reduce the energy consumption of the device, and at the same time improve the solvent recovery rate.

[0012] 4. Extremely energy-saving. There are almost no energy-consuming units in the whole system.

[0013] 5. Safe and stable. The airbag is made of anti-static imported polymer material, and the splicing part adopts high-temperature heat fusion process, which is tough and reliable; at the same time, the system is equipped with multiple safety monitoring units, safety warning devices, etc.

[0014] 6. Full-automatic control and convenient operation. ⑴. Unattended and full-automatic operation; ⑵. Measure and display the gas level height of the device in real time, and have high and low level alarms and interlock functions; ⑶. Automatically control the on-off state of the valve. When the valve is powered off, it is in a safe state to ensure the safety of the device; ⑷. Real-time monitor signals such as the pressure, gas level, and oxygen content of the device, and have alarm interlock functions; ⑸. Have the function of real-time detection and alarm of the combustible gas concentration in the device area. Brief Description of the Drawings

[0015] Figure 1 It is the system framework diagram of the present utility model.

[0016] As shown in the figure: 1. Outer shell; 2. Airbag; 3. Gas level transmitter; 4. Water seal; 5. Emergency discharge valve; 6. Tank tail gas; 7. Inlet pipe; 8. Exhaust pipe; 9. Tail gas treatment device; 10. Inlet valve. Detailed Description of the Specific Embodiment

[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, the term "comprising" and any deformation thereof are intended to cover non-exclusive inclusion.

[0018] The following further describes the present utility model in detail with reference to the drawings.

[0019] A variable-volume gas holder, comprising a housing 1, an airbag 2, a gas level transmitter 3, a pressure transmitter, a water seal 4, an emergency discharge valve 5 and a control system; the airbag 2 is floatingly arranged in the housing 1 and is connected to the gas level transmitter 3, the pressure transmitter and the control system arranged in the housing 1. The air inlet of the airbag 2 is connected to the tail gas 6 of the storage tank through an inlet pipe 7, and the air outlet of the airbag 2 is connected to the water seal 4 through an exhaust pipe 8. The water seal 4 is also connected to the tail gas treatment device 9 through the exhaust pipe 8. An emergency discharge valve 5 is arranged on the exhaust pipe 8, and an inlet valve 10 is arranged on the inlet pipe 7.

[0020] Preferably, the model of the inlet valve 10 is SA101.

[0021] It should be noted that the control system can adopt the existing control systems in the prior art. The control system has been widely applied in the technical field of gas holders for storing industrial gases, so there is no improvement involved, let alone improvement in computer programs and software methods.

[0022] It should be noted that Figure 1 Both PT and PG in [[ ]] are valves, and existing valve models in the prior art can be adopted. Since there is no improvement in the technical solution of this application, it will not be elaborated here.

[0023] The variable-volume gas holder is a skid-mounted cabinet composed of a solvent-resistant and acid-alkali-resistant soft airbag made of high molecular composite materials and a rock wool thermal insulation housing.

[0024] In the specific implementation of this embodiment:

[0025] When the gas holder is in the standby operation state, the incoming gas enters the airbag 2 through the air inlet. As the gas volume increases, the height of the airbag 2 increases accordingly. The gas level transmitter 3 will monitor the height of the airbag gas level in real time and transmit the data to the PLC or DCS system. The PLC or DCS system compares the set gas level value with the real-time gas level value. When the real-time value is less than the set discharge value, the airbag 2 normally receives the incoming gas. When the real-time value reaches the set discharge value, the emergency discharge valve 5 (model: discharge valve KV101) opens, and the incoming gas is discharged to the tail gas treatment device 9 through the discharge port. When the height of the airbag reaches the set low level, the discharge valve KV101 closes.

[0026] Functions of the variable-volume gas holder:

[0027] 1. The gas holder is provided with pressure protection. When the internal pressure of the airbag 2 exceeds the set value, the discharge valve KV101 opens, and the incoming gas is discharged to the tail gas treatment device 9 through the discharge port. When both the pressure transmitter and the gas level transmitter 3 fail, the tail gas is discharged to the emergency discharge port through the water seal.

[0028] 2. Water seal protection. When the system is overpressured, the tail gas is discharged through the water seal tank via the discharge port to prevent damage to the gas holder due to overpressure.

[0029] 3. Combustible gas monitoring. When there is a leak in the gas holder and the set value of the combustible gas alarm is reached, the system alarms and transmits the signal remotely to the computer / DCS / PLC.

[0030] 4. Alarm device. The system is equipped with interlock alarms for height, pressure, combustible gas, etc. When an alarm occurs, the corresponding alarm content will be transmitted remotely to the computer / DCS / PLC.

[0031] The above describes the present utility model and its implementation manners. Such a description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present utility model, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.

Claims

1. A variable volume gas cabinet, characterized in that: The invention comprises a housing (1), an air bag (2), a gas level transmitter (3), a pressure transmitter, a water seal (4), an emergency discharge valve (5) and a control system; the air bag (2) is arranged in a floating manner in the housing (1) and is connected to the gas level transmitter (3), the pressure transmitter and the control system arranged in the housing (1); the air inlet of the air bag (2) is connected to the tail gas (6) of the storage tank via an air inlet pipe (7); the air outlet of the air bag (2) is connected to the water seal (4) via an exhaust pipe (8); the water seal (4) is also connected to the tail gas treatment device (9) via an exhaust pipe (8); and the exhaust pipe (8) is provided with an emergency discharge valve (5).

2. A variable volume gas cabinet according to claim 1, characterized in that: The air intake pipe (7) is provided with an air intake valve (10).

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