Sealing groove structure for electrolytic bath

Abstract

According to the sealing groove structure for the electrolytic cell, a sealing area comprises an outer side sealing area, a middle sealing area and an inner side sealing area, and concave-convex sealing structures are arranged between the outer side sealing area and the middle sealing area and between the middle sealing area and the inner side sealing area on the connected surfaces of a convex face frame plate and a concave face frame plate. By means of the novel sealing structure of the electrolytic cell, the sealing performance of the electrolytic cell can be improved, environmental pollution and harm caused by running, emitting, dripping, leakage, seepage and the like are eliminated, the replacement frequency of a sealing gasket is reduced, the service life of the sealing gasket is prolonged, the service life of the electrolytic cell is prolonged, and the service life of the electrolytic cell is prolonged. And contributions are made to electrolysis industry and ecological environment protection, resource saving, safe and stable operation of the electrolytic cell and health and safety of animals, plants and human beings.

Description

Technical Field

[0001] The present invention belongs to the technical field of sealing structures, and specifically relates to a sealing tank structure for an electrolytic cell. Background Art

[0002] The process using electrochemical technology as the production method has the advantages of low energy consumption, good atomic utilization, mild reaction, good operating conditions, etc., and is widely used in modern industrial production. At present, production activities based on electrochemistry are increasing, especially in chemical production, electrochemical energy, mechanical processing and surface treatment, environmental protection, etc., and the chlor-alkali industry, electrolytic hydrogen production, electrolytic hydrogen peroxide and sodium hypochlorite production all require the use of electrolytic cells as reaction sites. At present, electrolytic cells are widely used in industrial production processes due to problems such as running, bubbling, dripping, leakage, and seepage caused by poor sealing or unreasonable sealing surface design. Production accidents are common, especially when the electrolyte or its electrolysis products are toxic, corrosive, and volatile. These problems will not only seriously pollute the environment, but also waste resources, and pose a great threat to the life and health of animals, plants and humans. Therefore, the problem of efficient and reasonable sealing of electrolytic cells urgently needs to be efficiently handled and solved.

[0003] Prior art 202211058314.8 discloses a lip seal and an electrolytic cell sealing structure, wherein the lip seal comprises a sealing body, and outer lips and inner lips are respectively arranged on the outer wall and inner wall thereof, the lip seal is installed between two pole frames, a lip chamber is arranged on the sealing body and communicated with the medium chamber, and thus has a good sealing effect; however, the sealing structure has many shortcomings in the electrolytic cell production process:

[0004] The versatility is extremely poor. The implementation of this invention requires a special-shaped sealing ring, which has a high degree of processing complexity and material cost, resulting in high cost of the electrolytic cell;

[0005] Due to the existence of the medium channel, the part of the sealing gasket inside the sealing ring groove (internal pressure pad) completely loses its sealing function, forming a sealing "dead zone", which in turn leads to a narrower "width" of the overall sealing surface, increasing the possibility of leakage; the ineffective sealing width of the sealing dead zone will lead to a waste of sealing materials and pole frame materials; and increase the weight of the equipment excessively.

[0006] The limit ring groove is a 90° (male) right-angle extrusion seal. In a thermal expansion and contraction environment, tearing may occur due to insufficient shrinkage. At the same time, there is no smooth transition between the contact surface between the sealing ring and the pole frame material. During the assembly and pressing process of the electrolytic cell, it is very easy to cause fracturing (damage) at the male corner (90° limit ring groove), which seriously affects the sealing effect.

[0007] The sealing system is an extremely important structure in the chlor-alkali industry, electrolytic hydrogen production, electrolytic hydrogen peroxide production, electrochemical synthesis, etc., which use the electrolyzer as a reaction site. It is related to the safe, stable and efficient operation of the entire production system. Any leakage can lead to immeasurable losses. In addition, the sealing system is also an important bottleneck restricting the large-scale development of the electrolyzer, which will limit its large-scale development path. Utility Model Content

[0008] Therefore, in response to the various above-mentioned problems existing in the sealing system and structure, an electrolytic cell sealing structure is proposed; it aims to improve the sealing performance of the electrolytic cell, eliminate environmental pollution and harm caused by escape, bubbling, dripping, leakage, and seepage, reduce the frequency of replacement of sealing gaskets, and increase their service life, so as to contribute to the protection of the electrolytic industry and ecological environment, save resources, ensure the safe and stable operation of the electrolytic cell, and the health and safety of animals, plants and humans.

[0009] In order to solve the above problems, this paper proposes a sealing slot structure for an electrolytic cell. The sealing slot structure is provided with sealing frame plates on the upper and lower sides. The sealing frame plates include convex frame plates and concave frame plates. A sealing medium is provided between the convex frame plates and the concave frame plates. The upper and lower surfaces of the convex frame plates and the concave frame plates are provided with sealing areas in an annular layered manner. The sealing areas are provided with a plurality of anode and cathode frames in parallel. The sealing areas include an outer sealing area, a middle sealing area and an inner sealing area. Concave-convex sealing structures are provided between the outer sealing area and the middle sealing area of ​​the connected surfaces of the convex frame plates and the concave frame plates, and between the middle sealing area and the inner sealing area. The outer edges of the anode and cathode frames are provided with connecting arcs, and the edges of the concave-convex sealing structures are provided with connecting arcs. Through the sealing structure in the new electrolytic cell, the sealing performance of the electrolytic cell can be improved, the environmental pollution and harm caused by running, bubbling, dripping, leaking, and seepage can be eliminated, the replacement frequency of the sealing gasket can be reduced, and its service life can be increased, so as to contribute to the electrolytic industry and ecological environment protection, save resources, ensure the safe and stable operation of the electrolytic cell, and the health and safety of animals, plants and humans.

[0010] The sealing frame plate is in the shape of a circular disc, and the upper and lower surfaces of the sealing frame plate are both parallel flat surfaces. The positive and negative pole frames on the surface of the sealing frame plate are both annular arcs. The surface of the sealing frame plate is provided with a universal sealing medium, and the sealing medium is a universal gasket. This pole frame sealing structure does not require replacement of the gasket structure or material formula commonly used in the current electrolytic cell, and does not require a specially made special-shaped sealing ring. The traditional flat gasket can be directly used to achieve the expected effect, and has good universal applicability and compatibility.

[0011] The outer sealing area, the middle sealing area and the inner sealing area are all provided with anode and cathode frames parallel to each other. The number of anode and cathode frames in the outer sealing area is greater than the number of anode and cathode frames in the middle sealing area and the inner sealing area, and the number of anode and cathode frames in the middle sealing area and the inner sealing area are the same. By providing an electrolytic cell sealing structure, in particular, a multi-section variable diameter sealing arrangement and a contact surface fitting reinforcement structure with a smooth transition formed on the sealing surface are adopted to avoid the adverse effects of direct "angle" transition of the traditional sealing surface; the structure does not cause fracturing or cutting damage to the sealing gasket, and ensures the good adaptability of the sealing gasket in a hot and cold alternating environment, a certain expansion and contraction compensation performance, and sealing performance.

[0012] The concave-convex sealing structure includes a convex frame and a concave frame, which are pressed downwards and connected in a nested manner. Both sides of the convex frame and the concave frame are arc-shaped edges, the bottom edges of the convex frame and the concave frame are horizontal edges, and the corners of the convex frame and the concave frame are provided with connecting arcs. The symmetrical sealing inlay structure between the concave and convex pole frame plates is adopted, which can effectively improve the effectiveness of the seal during the production and operation of the electrolytic cell and prevent the occurrence of liquid (gas) leakage; due to the improvement of the strength of the sealing structure and the sealing effect, the width of the sealing surface can be effectively reduced, thereby reducing the use of sealing materials and pole frame materials, and effectively reducing the equipment quality.

[0013] The sealing medium is made of flexible material, and is arranged between the connected anode and cathode frames. The sealing medium is fitted between the concave and convex sealing structures. The outer surfaces of the anode and cathode frames are flush with each other, and the outer surfaces of the anode and cathode frames and the outer surfaces of the sealing frame plates are flush with each other. The connecting arcs are all chamfered arcs with angular edges, and the relative cross-sections of the symmetrical connecting arcs are flush with each other. The smooth transition fitting of the pole frames and the concave and convex structures embedded between the pole frames can greatly extend the service life of the gasket, reduce the impact of sudden changes in temperature of the electrolytic cell on the application of the sealing material, reduce the number of times the sealing gasket is replaced in the equipment, and improve the sealing effect and economic benefits.

[0014] Beneficial effects:

[0015] The sealing structure of the new electrolytic cell can improve the sealing performance of the electrolytic cell, eliminate environmental pollution and harm caused by leakage, seepage, etc., reduce the frequency of replacement of sealing gaskets, and increase their service life, so as to contribute to the protection of the electrolytic industry and ecological environment, save resources, ensure the safe and stable operation of the electrolytic cell, and the health and safety of animals, plants and humans.

[0016] By providing an electrolytic cell sealing structure, in particular, adopting a multi-section variable diameter sealing arrangement and a contact surface fitting reinforcement structure with a smooth transition formed on the sealing surface, the adverse effects of direct "angle" transition of the traditional sealing surface are avoided; the structure does not cause fracturing or cutting damage to the sealing gasket, and ensures that the sealing gasket has good adaptability, certain expansion and contraction compensation performance, and sealing performance in a hot and cold alternating environment.

[0017] The symmetrical sealing inlay structure between the concave and convex pole frame plates can effectively improve the effectiveness of the seal during the production and operation of the electrolytic cell and prevent liquid (gas) leakage; due to the improvement of the sealing structure strength and sealing effect, the sealing surface width can be effectively reduced, thereby reducing the use of sealing materials and pole frame materials, and effectively reducing the equipment weight.

[0018] The use of smooth transition fitting of the pole frames and the inlaying of concave-convex structures between the pole frames can greatly extend the service life of the gasket, reduce the impact of sudden changes in temperature of the electrolytic cell on the application of sealing materials, reduce the number of times the sealing gasket is replaced in the equipment, and improve the sealing effect and economic benefits.

[0019] The pole frame sealing structure does not require replacement of the gasket structure or material formula commonly used in the current electrolytic cell, and does not require a specially made special-shaped sealing ring. The traditional flat gasket can be directly used to achieve the desired effect, and has good universal applicability and compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a connection schematic diagram of a sealing tank structure for an electrolytic cell;

[0021] Figure 2 It is a connection cross-sectional view of a sealing tank structure for an electrolytic cell;

[0022] Figure 3 It is a partially enlarged schematic cross-sectional view of a sealing tank structure for an electrolytic cell;

[0023] In the figure; 1, convex frame plate, 2, concave frame plate, 3, outer sealing area, 4, middle sealing area, 5, inner sealing area, 6, sealing medium, 7, concave and convex sealing structure, 8, connecting arc. DETAILED DESCRIPTION

[0024] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0025] Convex frame plate 1, concave frame plate 2, outer sealing area 3, middle sealing area 4, inner sealing area 5, sealing medium 6, concave-convex sealing structure 7, connecting arc 8.

[0026] like Figure 1 , 2 , as shown in 3;

[0027] A sealing slot structure for an electrolytic cell, wherein sealing frame plates are arranged on the upper and lower sides of the sealing slot structure, the sealing frame plates include a convex frame plate 1 and a concave frame plate 2, a sealing medium 6 is arranged between the convex frame plate 1 and the concave frame plate 2, the upper and lower surfaces of the convex frame plate 1 and the concave frame plate 2 are both provided with sealing areas in annular layers, the sealing areas are provided with a plurality of anode and cathode frames in parallel, the sealing areas include an outer sealing area 3, a middle sealing area 4 and an inner sealing area 5, a concave-convex sealing structure 7 is arranged between the outer sealing area 3 and the middle sealing area 4 of the connected surfaces of the convex frame plate 1 and the concave frame plate 2, a connecting arc 8 is arranged on the outer edges of the anode and cathode frames, and a connecting arc 8 is arranged on the edges of the concave-convex sealing structure 7, the sealing frame plate is in the shape of a circular disc, the upper and lower surfaces of the sealing frame plate are both parallel flat surfaces, the anode and cathode frames on the surface of the sealing frame plate are both annular arcs, the outer sealing area 3, The middle sealing area 4 and the inner sealing area 5 are both provided with anode and cathode frames parallel to each other, the number of anode and cathode frames in the outer sealing area 3 is greater than the number of anode and cathode frames in the middle sealing area 4 and the inner sealing area 5, and the number of anode and cathode frames in the middle sealing area 4 and the inner sealing area 5 is the same, the concave-convex sealing structure 7 includes a convex frame and a concave frame, the convex frame and the concave frame are connected in a nested manner by pressing each other down, both sides of the convex frame and the concave frame are arc edges, the bottom edges of the convex frame and the concave frame are horizontal edges, and the corners of the convex frame and the concave frame are both provided with connecting arcs 8, the material of the sealing medium 6 is a flexible material, the sealing medium 6 is arranged between the connected anode and cathode frames, and the sealing medium 6 is fitted between the concave-convex sealing structure 7, the connecting arcs 8 are all arc chamfers of the edges of the corners, the relative cross-sections of the mutually symmetrical connecting arcs 8 are all flush with each other, the outer side surfaces of the anode and cathode frames are all horizontally flush with each other, and the outer side surfaces of the anode and cathode frames and the outer side surfaces of the sealing frame plates are all horizontally flush with each other.

[0028] Implementation examples;

[0029] The pole frame structure adopting the sealing structure of the present invention has 60 test chambers, a circular electrolytic cell, a pole plate diameter of 600 mm, and a total width of the pole frame sealing line of 15 mm;

[0030] The connection radius between the sealing structure of the concave and convex surface of the pole frame in the sealing area and the substrate: 0.1mm

[0031] A: Angle range of anode and cathode frames 45° R: Chamfer radius 0.2mm W: Sealing line width 1.0mm H: Sealing line height 0.5mm.

[0032] The present application has good sealing performance through the sealed pole frame structure, the maximum pressure resistance can reach more than 16MPa, and there is no leakage after testing, which is much higher than the current sealing structure of traditional electrolytic cells.

[0033] The sealing performance of the pole frame with the transition fitting area and the concave-convex sealing stacking structure is much higher than that of the pole frame without such structure;

[0034] The sealing performance of the pole frame with the concave-convex stacking structure is higher than that of the pole frame without such structure;

[0035] The sealed pole frame structure has good gasket disassembly performance and minimal damage to the gasket. The gasket can be reused many times, reducing the economic cost of replacing materials and greatly improving the service life.

[0036] It is possible to achieve higher performance than that of a traditional sealed pole frame with a smaller total width of the sealing area, which can effectively save materials and reduce the overall weight of the equipment.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing tank structure for an electrolytic cell, wherein the sealing tank structure is provided with sealing frame plates at the upper and lower sides, the sealing frame plates comprising a convex frame plate and a concave frame plate, and a sealing medium is provided between the convex frame plate and the concave frame plate, characterized in that: The upper and lower surfaces of the convex frame plate and the concave frame plate are both provided with sealing areas in an annular layered manner. The sealing areas are provided with several anode and cathode frames in parallel. The sealing areas include an outer sealing area, a middle sealing area and an inner sealing area. Concave and convex sealing structures are provided between the outer sealing area and the middle sealing area and between the middle sealing area and the inner sealing area of ​​the connected surfaces of the convex frame plate and the concave frame plate. The outer edges of the anode and cathode frames are provided with connecting arcs, and the edges of the concave and convex sealing structures are provided with connecting arcs.

2. The sealing tank structure for an electrolytic cell according to claim 1, characterized in that: The sealing frame plate is in the shape of a circular disc, the upper and lower surfaces of the sealing frame plate are both parallel flat surfaces, and the anode and cathode frames on the surface of the sealing frame plate are both annular arcs.

3. The sealing tank structure for an electrolytic cell according to claim 1, characterized in that: The outer sealing area, the middle sealing area and the inner sealing area are all provided with anode and cathode frames parallel to each other. The number of anode and cathode frames in the outer sealing area is greater than the number of anode and cathode frames in the middle sealing area and the inner sealing area, and the number of anode and cathode frames in the middle sealing area and the inner sealing area is the same.

4. The sealing tank structure for an electrolytic cell according to claim 1, characterized in that: The concave-convex sealing structure includes a convex frame and a concave frame, which are pressed down and connected in a nested manner. Both sides of the convex frame and the concave frame are arc-shaped edges, the bottom edges of the convex frame and the concave frame are horizontal edges, and the corners of the convex frame and the concave frame are provided with connecting arcs.

5. The sealing tank structure for an electrolytic cell according to claim 1, characterized in that: The sealing medium is made of a flexible material, is arranged between the connected anode and cathode frames, and is fitted between the concave and convex sealing structures.

6. The sealing tank structure for an electrolytic cell according to claim 1, characterized in that: The connecting arcs are all arc chamfers of angular edges, and the relative tangent surfaces of the mutually symmetrical connecting arcs are all flush with each other.

7. The sealing tank structure for an electrolytic cell according to claim 1, characterized in that: The outer surfaces of the anode and cathode frames are all flush with each other, and the outer surfaces of the anode and cathode frames and the outer surface of the sealing frame plate are all flush with each other.

8. The sealing tank structure for an electrolytic cell according to claim 1, characterized in that: The surface of the sealing frame plate is provided with a universal sealing medium, which is a universal gasket.

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