Coking plant storage tank pressure balancing regulation system

Abstract

The utility model relates to the technical field of storage tank storage, especially relates to a coking plant storage tank pressure balance adjusting system, multiple same type storage tanks are a group, and the breathing pipeline of each storage tank in the same group is connected with the buffer tank through the balance pipeline, the buffer tank is connected with the air inlet of the gas storage tank through the exhaust pipeline, the compressor is equipped on the exhaust pipeline, the air outlet of the gas storage tank is connected with the buffer tank through the air supplement pipeline, the air supplement pipeline is connected with the nitrogen air supplement pipeline, and the tail gas external discharge pipeline is equipped on the gas storage tank. The utility model reduces the nitrogen supplement amount, reduces the nitrogen consumption. Reduce the VOCs tail gas into the post -treatment procedure, reduce carbon emission intensity. Reduce the amount of benzene medium external discharge to the post -treatment procedure, reduce the loss of benzene medium in the storage tank.

Description

Technical Field

[0001] This utility model belongs to the field of storage tank technology, and specifically relates to a pressure balance regulation system for coking plant storage tanks. Background Technology

[0002] Currently, a nitrogen-sealed pressure balancing process is commonly used. This involves first modifying the chemical storage tank to be sealed, then installing nitrogen-sealed pipelines and automatic control valves, as well as external discharge pipelines and automatic control valves. The internal pressure of the tank fluctuates with changes in the internal material level or ambient temperature. When the internal pressure falls below a set value, the automatic valve on the nitrogen-sealed pipeline opens to replenish nitrogen and raise the tank pressure to the set value. When the internal pressure exceeds the set value, the automatic control valve on the external discharge pipeline opens to release excess VOC-containing exhaust gas to subsequent environmental treatment facilities.

[0003] The drawback of this scheme is that as the liquid level or temperature of the storage tank rises or falls, a large amount of nitrogen needs to be added when the pressure of the storage tank decreases, and a large amount of oil-containing VOCs exhaust gas is emitted into the environmental protection recycling system when the pressure increases. This results in a large consumption of nitrogen and a large waste of exhaust gas containing chemicals, increasing the loss of valuable chemicals. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a pressure balance regulation system for coking plant storage tanks to solve the problems of energy waste and chemical loss.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pressure balancing and regulating system for coking plant storage tanks comprises multiple storage tanks of the same type grouped together. The breathing pipes of each storage tank in the group are connected to a buffer tank via a balancing pipe. The buffer tank is connected to the air inlet of a gas storage tank via an exhaust pipe. A compressor is installed on the exhaust pipe. The air outlet of the gas storage tank is connected to the buffer tank via a make-up air pipe. The make-up air pipe is connected to a nitrogen make-up air pipe. The gas storage tank is equipped with a tail gas exhaust pipe.

[0007] The buffer tank has a capacity of 2-3m³. 3 .

[0008] The gas storage tank has a capacity of 10-20m³. 3 .

[0009] The gas supply line is equipped with a regulating valve.

[0010] The nitrogen supply pipeline is connected to an external nitrogen source.

[0011] Compared with existing technologies, the beneficial effects of this utility model are:

[0012] 1) This utility model realizes the temporary storage and replenishment process of the tail gas in the storage tank by setting up a buffer tank and a gas storage tank, so that the VOC tail gas flows inside the tank group and achieves pressure balance.

[0013] 2) Reduced nitrogen supply and decreased nitrogen consumption.

[0014] 3) It reduces the amount of VOCs entering the after-treatment process. If the after-treatment process uses combustion, it can significantly reduce the amount of carbon dioxide emitted after combustion and reduce carbon emission intensity.

[0015] 4) Reduce the amount of benzene-based media discharged to the post-processing stage, reduce the loss of benzene-based media in the storage tank, and maximize the yield of raw materials and products.

[0016] 5) Since the gas storage tank contains compressed, pressurized exhaust gas without air mixing in, and its pressure value can be adjusted by setting, there are multiple post-treatment methods available for the excess exhaust gas in the storage tank. Different post-treatment methods can be selected according to the characteristics of different enterprises, such as sending it to an incinerator for combustion, to an RTO furnace for combustion, to a gas pipeline for recovery in a gas purification device, and to a post-condensation adsorption unit for adsorption, etc. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of an embodiment.

[0019] In the diagram: 1. Storage tank; 2. Buffer tank; 3. Exhaust pipe; 4. Compressor; 5. Gas storage tank; 6. Gas replenishment pipe; 7. Regulating valve; 8. Nitrogen replenishment pipe; 9. Exhaust gas discharge pipe. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 A pressure balancing and regulating system for coking plant storage tanks, comprising multiple storage tanks 1 of the same type as a group, wherein the breathing pipes of each storage tank 1 in the same group are connected to a buffer tank 2 through a balancing pipe, the buffer tank 1 is connected to the air inlet of a gas storage tank 5 through an exhaust pipe 3, a compressor 4 is provided on the exhaust pipe 3, the air outlet of the gas storage tank 5 is connected to the buffer tank 2 through a gas replenishment pipe 6, the gas replenishment pipe 6 is connected to a nitrogen gas replenishment pipe 8, and the gas storage tank 5 is provided with a tail gas exhaust pipe 9.

[0023] Buffer tank 2 has a capacity of 2-3m³. 3 .

[0024] The capacity of gas storage tank 5 is 10-20m³. 3 .

[0025] A regulating valve 7 is installed on the air supply line 6.

[0026] Nitrogen supply line 8 is connected to an external nitrogen source.

[0027] The working process of the above device:

[0028] Within a unit of time, the exhalation or inhalation volume of the storage tank 1 in the same group is not greater than the capacity of the buffer tank 2, and the pressure self-balancing is achieved by the various storage tanks 1 and buffer tank 2 in the same group.

[0029] Within a unit of time, the exhalation volume of storage tank 1 in the same group is greater than the capacity of buffer tank 2, and exhaust is discharged from buffer tank to storage tank 5; when the storage volume in storage tank 5 exceeds the maximum set value, the storage tank will discharge the excess gas to the subsequent environmental protection treatment facility.

[0030] If the gas intake of storage tank 1 in the same group is greater than the capacity of buffer tank 2 within a unit of time, gas is replenished from storage tank to buffer tank 5; if the gas in storage tank 5 is insufficient, nitrogen is replenished by nitrogen replenishment pipeline 8.

[0031] The preferred embodiments of this utility model have been described in detail above. However, this utility model is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model, and these simple modifications all fall within the protection scope of this utility model. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately. Furthermore, various different embodiments of this utility model can also be arbitrarily combined, as long as they do not violate the spirit of this utility model, they should also be considered as the content disclosed by this utility model.

[0032] To make the objectives, technical solutions, and technical effects of this utility model clearer, the technical solutions in the embodiments of this utility model are now described clearly and completely. However, the embodiments described below are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] Example:

[0034] A coking plant has six storage tanks: A1, A2, A3, A4, A5, and A6. Tanks A1 and A2 are of the same type, as are A3 and A4, and A5 and A6. The capacity of tanks A1, A2, A3, A4, A5, and A6 is 200 m³. 3 .

[0035] like Figure 2 A pressure balancing and regulating system for coking plant storage tanks, comprising multiple storage tanks 1 of the same type as a group, wherein the breathing pipes of each storage tank 1 in the same group are connected to a buffer tank 2 through a balancing pipe, the buffer tank 2 is connected to the air inlet of a gas storage tank 5 through an exhaust pipe 3, a compressor 4 is provided on the exhaust pipe 3, the air outlet of the gas storage tank 5 is connected to the buffer tank 2 through a gas replenishment pipe 6, a regulating valve 7 is provided on the gas replenishment pipe 6, the gas replenishment pipe 6 is also connected to a nitrogen gas replenishment pipe 8, and the nitrogen gas replenishment pipe 8 is connected to an external nitrogen gas source.

[0036] Each gas storage tank 5 has an outlet connected to the exhaust gas pipe 9. The buffer tank 2 has a capacity of 2.5 m³. 3 (1 kPa slight positive pressure). The capacity of gas storage tank 5 is 10 m³. 3 (100KPa pressure storage tank).

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and basic spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coking plant storage tank pressure equalization regulation system, characterized by, Multiple storage tanks of the same type are grouped together. The breathing pipes of each storage tank in the same group are connected to the buffer tank through the balance pipe. The buffer tank is connected to the air inlet of the gas storage tank through the exhaust pipe. A compressor is installed on the exhaust pipe. The air outlet of the gas storage tank is connected to the buffer tank through the gas replenishment pipe. The gas replenishment pipe is connected to the nitrogen gas replenishment pipe. The gas storage tank is equipped with an exhaust pipe for exhaust gas.

2. A coking plant storage tank pressure equalization system as claimed in claim 1, characterized in that, The buffer tank has a capacity of 2-3 m 3 .

3. A coking plant storage tank pressure equalization system as claimed in claim 1, characterized in that, The gas tank has a capacity of 10-20m 3 .

4. The pressure balancing and regulating system for coking plant storage tanks according to claim 1, characterized in that, The gas supply line is equipped with a regulating valve.

5. The pressure balancing and regulating system for coking plant storage tanks according to claim 1, characterized in that, The nitrogen supply pipeline is connected to an external nitrogen source.

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