CN-117735104-B - VOCs eliminating structure for primary and secondary sealing annular area

CN117735104BCN 117735104 BCN117735104 BCN 117735104BCN-117735104-B

Abstract

The invention provides a primary and secondary seal annular region VOCs eliminating structure which comprises a mounting wall, a fixed angle seat, a secondary seal plate and a primary seal plate, wherein the fixed angle seat is connected with the mounting wall, one end of the secondary seal plate is fixedly connected with the fixed angle seat, the other end of the secondary seal plate is fixedly connected with the primary seal plate, and one end of the primary seal plate far away from the secondary seal plate is connected with the mounting wall. According to the invention, the primary sealing plate and the secondary sealing plate are used, so that gas phase leaked from the storage tank can be sealed between the primary sealing plate and the secondary sealing plate, the secondary sealing plates can be mutually overlapped and installed, external water and impurities are prevented from entering, and the existing secondary sealing film is omitted, so that the materials of a device are reduced, the economic benefit is improved, and the safety is improved.

Inventors

ZHAO YONGTAO
ZHANG YUHAN
GUAN GUOWEI
SUN WENYONG
Sun Jipei
FAN GUOTAO
ZHANG JINCHI

Assignees

中国石油天然气集团有限公司
中国石油集团安全环保技术研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20220915

Claims (7)

1. The primary and secondary sealing annular region VOCs eliminating structure is characterized by comprising a mounting wall (1), a fixed angle seat (2), a secondary sealing plate (3) and a primary sealing plate (4); The fixed angle seat (2) is connected with the mounting wall (1); One end of the secondary sealing plate (3) is fixedly connected with the fixed angle seat (2), and the other end of the secondary sealing plate is fixedly connected with the primary sealing plate (4); One end of the primary sealing plate (4) far away from the secondary sealing plate (3) is connected with the mounting wall (1); the secondary sealing plate (3) comprises a main body (301), a lower connecting plate (302) and an upper connecting plate (303), wherein the lower connecting plate (302) and the upper connecting plate (303) are respectively arranged at two sides of the main body (301); The upper connecting plate (303) is fixedly connected with the main body (301) and is vertically arranged relative to the main body (301); a plurality of discharge grooves (304) are formed in two sides of the main body (301), the discharge grooves (304) are used for discharging VOCs gas, the discharge grooves (304) are in a strip shape, the cross section of each discharge groove is semicircular, and the included angle between each discharge groove and the horizontal plane is 30-45 degrees; the secondary sealing plates (3) are connected side by side, and mounting positions are reserved at two sides of the main body (301) during mounting When two adjacent secondary sealing plates (3) are overlapped, the discharge grooves (304) on the adjacent secondary sealing plates (3) are mutually nested.
2. A primary and secondary seal ring area VOCs elimination structure according to claim 1, characterized in that the secondary seal plate (3) and the primary seal plate (4) are both spring plates.
3. The primary and secondary seal ring area VOCs eliminating structure according to claim 1, wherein the fixed corner seat (2) comprises an L-shaped seat and a reinforcing rib, and the reinforcing rib is disposed on a face corresponding to a right-angle side of the L-shaped seat.
4. The primary and secondary seal ring area VOCs eliminating structure according to claim 1, wherein the lower connecting plate (302) and the upper connecting plate (303) are provided with a plurality of through holes.
5. The primary and secondary seal ring area VOCs eliminating structure according to claim 1, wherein the upper connection plate (303) is fixedly connected with the fixed corner seat (2) through bolts.
6. A primary and secondary seal ring area VOCs elimination structure according to claim 1, characterized in that the lower connection plate (302) is connected with the primary seal plate (4).
7. The primary and secondary seal ring area VOCs elimination structure according to claim 1, wherein a sealing gasket (6) is further provided between the lower connecting plate (302) and the primary seal plate (4); The primary sealing plate (4) is also abutted against a floating disc (5); The secondary sealing plate (3), the sealing gasket (6), the primary sealing plate (4) and the floating disc (5) are sequentially stacked and connected through bolts.

Description

VOCs eliminating structure for primary and secondary sealing annular area Technical Field The invention belongs to the technical field of oil gas storage sealing, and particularly relates to a primary and secondary sealing annular region VOCs eliminating structure. Background The oil gas is generally stored and transported in a large storage tank, and along with the enlargement and integration of the storage tank, once the storage tank fires, the storage tank fires and explosion accidents with Doppler effect can be possibly caused, and the sealing ring fires are the main fire forms of the storage tank for the storage tank fires and explosion accidents. In existing tanks, there is some volatile oil accumulation space between the primary seal and the oil surface, known as an explosion hazard zone. If the primary seal is separated from the tank wall due to the primary seal deformation, floating disc drift and the like, the explosive mixed gas continues to diffuse between the primary seal and the secondary seal, and an accumulated explosion hazard space is formed in the area. Meanwhile, if the floating frequency of the floating pontoon is higher because of frequent oil inlet and outlet of the storage tank, volatile matters remained on the wall of the tank can accumulate explosive dangerous gas in the space. In addition, if the condition of lightning stroke is met, the lightning stroke ignition part mainly occurs at the sealing ring at the edge of the floating roof, and the conductive sheet with the oil gas diaphragm is arranged at the upper part of the secondary seal at intervals of 1.8-3.0 m, in the operation process of the storage tank, the conductive sheet is often not tightly attached to the tank wall, the residual oil film on the tank wall is separated to form a gap clearance, when the oil tank is subjected to lightning stroke, the instantaneous voltage difference between the floating roof and the tank wall can break down the clearance with a certain size to form discharge sparks, so that accumulated oil gas explosion ignition between the primary seal and the secondary seal is caused. Therefore, the primary and secondary sealing annular areas of the traditional storage tank only play roles in preventing rain, sand and sand, volatilization and the like, and the adoption of the oil-gas diaphragm has certain dangers, and along with the continuous improvement of the requirements on environmental protection, safety and economy, the primary and secondary sealing annular areas VOCs eliminating device needs to be designed. Disclosure of Invention Aiming at the problems, the invention provides a primary and secondary seal annular region VOCs eliminating structure, which is designed by considering the actual conditions of a storage tank and a seal facility and combining theory, so as to eliminate the VOCs in the seal annular space of the storage tank and improve the safety and reliability of the storage tank. In order to achieve the above purpose, the present invention adopts the following technical scheme: The eliminating structure for VOCs in the first and the second sealing ring areas includes one installing wall, one fixing angle seat, one second sealing plate and one first sealing plate; the fixed angle seat is connected with the mounting wall; One end of the secondary sealing plate is fixedly connected with the fixed angle seat, and the other end of the secondary sealing plate is fixedly connected with the primary sealing plate; One end of the primary sealing plate, which is far away from the secondary sealing plate, is connected with the mounting wall. Preferably, the secondary sealing plate and the primary sealing plate are both spring plates. Preferably, the fixed angle seat comprises an L-shaped seat and a reinforcing rib, and the reinforcing rib is arranged on a surface corresponding to the right-angle side of the L-shaped seat. Preferably, the secondary sealing plate comprises a main body, a lower connecting plate and an upper connecting plate, and the lower connecting plate and the upper connecting plate are respectively arranged on two sides of the main body. Preferably, the lower connecting plate is fixedly connected with the main body and is obliquely arranged relative to the main body. Preferably, the upper connecting plate is fixedly connected with the main body and is vertically arranged relative to the main body. Preferably, the lower connecting plate and the upper connecting plate are provided with a plurality of through holes. Preferably, the upper connecting plate is fixedly connected with the fixed angle seat through bolts. Preferably, the lower connection plate is connected with the primary sealing plate. Preferably, a sealing gasket is further arranged between the lower connecting plate and the primary sealing plate; the primary sealing plate is also abutted against a floating disc; the secondary sealing plate, the sealing gasket, the primary sealing plate and the floating disc are sequenti