A repairable plastic-lined reactor for corrosive materials

Abstract

This utility model discloses a repairable, plastic-lined reactor for corrosive materials, relating to the field of reactor technology. It includes a reactor body, a detachable inner liner assembled from multiple corrosion-resistant modules, a bottom mounting groove, and an upper detachable clamping mechanism. An independent detection cavity is provided between the inner wall of the reactor body and the back of each corrosion-resistant module. A conductive sensing element is installed within each cavity and connected to an external terminal block via a sealed feedthrough interface. When a module is damaged, the seeping material alters the electrical parameters of the corresponding conductive sensing element, enabling precise location of the leak. This utility model employs a modular design, allowing for rapid partial replacement and repair, significantly reducing maintenance costs. Simultaneously, the distributed detection system provides early leak warning, significantly improving equipment safety and service life.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a plastic-lined repairable reaction vessel for corrosive materials. Background Technology

[0002] In the chemical, pharmaceutical, and metallurgical industries, it is often necessary to handle highly corrosive materials, such as concentrated acids, strong alkalis, and halides. To meet this challenge, reaction vessels are usually lined with corrosion-resistant materials on their inner metal walls, among which plastic lining (such as PTFE, PFA, PO, etc.) is a widely used technique.

[0003] Currently, most mainstream plastic-lined reactors adopt an integral lining structure, meaning the plastic inner liner is completely attached to the inner wall of the metal reactor body through processes such as sintering, molding, or bonding. While this structure provides good corrosion protection in the initial stage, it has a significant drawback: "A small damage renders the entire reactor unusable." In actual production, the lining is highly susceptible to damage due to material erosion, thermal stress caused by temperature changes, or mechanical scratching. Once damaged, corrosive media can seep in through the breach, spreading between the lining and the metal reactor body, causing rapid corrosion of the metal reactor body, resulting in equipment failure, and even safety accidents.

[0004] When a monolithic liner suffers localized damage, on-site repair is extremely difficult. It typically requires prolonged equipment shutdown for extensive repairs by professionals, or the entire reactor being transported back to the manufacturer for relining. This repair approach is not only complex and time-consuming but also costly, severely impacting production continuity and economic efficiency.

[0005] Furthermore, existing technologies are severely inadequate in detecting lining damage. Damage to the lining is often only discovered when materials contaminate the product or the vessel body corrodes and perforates, leading to leaks; by then, serious consequences have usually already occurred. While methods such as spark testing exist, these are reactive, offline inspections that require shutdown, failing to provide real-time, online monitoring and early warning of the lining's health status.

[0006] Therefore, there is an urgent need in this field for a new type of reactor structure that can achieve rapid and low-cost local repair of the lining, while also having the ability to detect and accurately locate damage points early, thereby fundamentally overcoming the above-mentioned defects of integral plastic-lined reactors. Utility Model Content

[0007] Purpose of the invention: The purpose of this utility model is to provide a repairable plastic-lined reactor for corrosive materials, overcoming the shortcomings of existing integral plastic-lined reactors that are difficult to repair after partial damage. It provides a modular plastic-lined reactor that can be quickly and locally replaced, and can monitor and accurately locate leak points in real time, thereby significantly reducing maintenance costs and extending equipment life.

[0008] Technical solution:

[0009] A repairable plastic-lined reactor for corrosive materials includes a reactor body and a detachable inner liner assembled from multiple corrosion-resistant modules disposed within the reactor body. The bottom inner side of the reactor body has a ring of bottom mounting grooves for supporting and positioning the corrosion-resistant modules. The upper inner side of the reactor body has a detachable clamping mechanism for pressing and fixing the corrosion-resistant modules from above. An independent detection cavity is formed between the inner wall of the reactor body and the back of each corrosion-resistant module. Each detection cavity contains a conductive sensing sheet that adheres to the inner wall of the reactor body. Each conductive sensing sheet is electrically connected to an external terminal block through an independent sealed feedthrough interface.

[0010] Furthermore, the detachable clamping mechanism is a detachable pressure ring connected to the vessel body by bolts.

[0011] Furthermore, a top sealing ring is pressed between the detachable pressure ring and the top of the corrosion-resistant module.

[0012] Furthermore, a bottom sealing gasket is laid at the bottom of the bottom mounting groove.

[0013] Furthermore, the conductive sensing sheet is a metal foil, a conductive rubber sheet, or a conductive coating formed by printing or spraying.

[0014] Furthermore, corrosion-resistant sealing elements are provided at the joints between the corrosion-resistant modules.

[0015] Furthermore, the joint edges of the corrosion-resistant module are provided with mutually cooperating stepped or mortise-and-tenon structures.

[0016] Beneficial effects:

[0017] 1. The traditional one-piece liner is innovatively designed as a detachable inner liner assembled from multiple independent modules, fundamentally solving the industry problem of "damage to one part leads to the scrapping of the entire machine." When a local module is damaged, there is no need for extensive treatment or return to the factory for repair. The damaged individual module can be quickly replaced using the detachable clamping mechanism at the top. This greatly shortens maintenance time, reducing downtime of weeks or even months to hours, significantly reducing maintenance costs and material losses, and improving the continuous operation capability of the production line.

[0018] 2. By setting independent detection cavities and conductive induction plates between the inner wall of the vessel and each lining module, this invention constructs a distributed online leakage detection system. This system can monitor the status behind each module in real time. Once a module is damaged, corrosive liquid seeps into its corresponding detection cavity, immediately causing a change in the electrical parameters of that circuit, thus triggering an alarm. This not only enables early detection of lining damage but also accurately locates the specific module where the leak is occurring, providing a clear target for maintenance work and avoiding secondary damage and safety accidents caused by untimely fault detection.

[0019] 3. The coordinated design of the "bottom mounting groove support and positioning" and the upper detachable clamping mechanism ensures the overall rigidity and stability of the modular inner liner under complex working conditions, effectively preventing loosening caused by stirring or material impact. Simultaneously, the bottom sealing gasket, top sealing ring, and inter-module sealing elements together form a three-dimensional sealing barrier, minimizing material leakage from different paths and guaranteeing the long-term sealing reliability of the equipment.

[0020] 4. The detection unit of this utility model has a simple structure, consisting only of a conductive sensing sheet and a sealed feedthrough interface, eliminating the need for complex circuitry embedded inside the lining module. This simplifies manufacturing and keeps costs under control. Each detection unit operates independently without interference; even if a single detection unit fails, it will not affect the detection functions of other units, resulting in strong overall system robustness. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0023] Figure 3 This is an internal schematic diagram of the concealed corrosion-resistant module of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal installation of the corrosion-resistant module of this utility model;

[0025] Figure 5 This is an enlarged schematic diagram of the bottom mounting groove position of this utility model. Detailed Implementation

[0026] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] like Figure 1-5As shown, a repairable plastic-lined reactor for corrosive materials includes a reactor body 1 and a detachable inner liner assembled from multiple corrosion-resistant modules 3 within the reactor body 1. The bottom inner side of the reactor body 1 has a bottom mounting groove 2 for supporting and positioning the corrosion-resistant modules 3, providing stable bottom support and radial positioning for the modules 3, ensuring accurate positioning during installation. The upper inner side of the reactor body 1 has a detachable clamping mechanism 4 for pressing and fixing the corrosion-resistant modules 3 from above. The detachable clamping mechanism 4 applies axial clamping force to the corrosion-resistant modules 3 from above, forming a stable fixing structure together with the bottom mounting groove 2. The structure includes an independent detection cavity 5 formed between the inner wall of the vessel body 1 and the back of each corrosion-resistant module 3, establishing an independent leakage monitoring space for each corrosion-resistant module 3 and realizing modular positioning of the leakage point; each detection cavity 5 is provided with a conductive sensing sheet 6 attached to the inner wall of the vessel body 1, using the conductive sensing sheet 6 as a sensor, which changes its electrical characteristics when corrosive material penetrates into the detection cavity 5; each conductive sensing sheet 6 is electrically connected to an external terminal block through an independent sealed feedthrough interface 7, and the electrical signal of the conductive sensing sheet 6 is led out to the external detection circuit through the sealed feedthrough interface 7, while maintaining the sealing integrity of the vessel body 1.

[0029] The detachable clamping mechanism 4 is a detachable clamping ring connected to the vessel body 1 by bolts. The pre-tightening force applied by the bolts causes the detachable clamping ring to generate downward pressure, firmly pressing the corrosion-resistant module 3 into the bottom mounting groove 2.

[0030] A top sealing ring is pressed between the detachable pressure ring and the top of the corrosion-resistant module 3. The elastic deformation of the top sealing ring fills the gap between the pressure ring and the module 3, preventing material from seeping into the detection cavity 5 from the top.

[0031] The bottom of the bottom mounting groove 2 is covered with a bottom sealing gasket. The compression deformation of the bottom sealing gasket is used to seal the contact interface between the corrosion-resistant module 3 and the bottom mounting groove 2, preventing material leakage from the bottom.

[0032] The conductive sensing sheet 6 is a metal foil, a conductive rubber sheet, or a conductive coating formed by printing or spraying. The appropriate conductive material is selected according to different working conditions to ensure that material leakage can still be reliably detected in corrosive environments.

[0033] A corrosion-resistant sealing element is provided at the joint between the corrosion-resistant modules 3. The side seal between the modules 3 is achieved by the elastic restoring force of the corrosion-resistant sealing element, which prevents material from leaking from the joint.

[0034] The joint edges of the corrosion-resistant module 3 are provided with mutually cooperating stepped or mortise-and-tenon structures.

[0035] The working principle of this invention is as follows: Under normal operation, the corrosion-resistant module 3 forms a complete inner protective layer. When a corrosion-resistant module 3 is damaged, corrosive material will seep into the corresponding detection cavity 5, contacting the conductive sensing element 6 and causing a change in electrical parameters. The damaged module can then be accurately located through an external detection circuit. During repair, simply loosen the detachable clamping mechanism 4 and replace the corresponding corrosion-resistant module 3 to restore its use, achieving fast and accurate local repair.

[0036] Specifically, in this embodiment, all sealing components, including the top sealing ring, bottom sealing gasket, and corrosion-resistant sealing element, employ an elastic compression sealing method. Pre-tightening force causes elastic deformation of the sealing material to achieve interface sealing, ensuring the reliability of the seals at each connection point. The top cover of the vessel is connected to the vessel body via flanges and bolts, and a metal spiral wound gasket or graphite gasket is used for sealing, forming a detachable sealing structure.

[0037] The conductive sensor detects leaks by sensing changes in the electrical properties of the medium within the cavity. When corrosive materials seep into the detection cavity, they cause changes in parameters such as the resistance and capacitance of the conductive sensor, which can then be identified by an external detection circuit. Each conductive sensor is connected to a terminal block via an independent shielded cable to prevent signal interference.

[0038] The corrosion-resistant modules are made of reinforced polytetrafluoroethylene, perfluoroalkoxy resin, or ultra-high molecular weight polyethylene, exhibiting excellent corrosion resistance and mechanical strength. The joints between modules utilize a labyrinth-type sealing structure, combined with corrosion-resistant sealing elements to form multiple layers of sealing protection.

[0039] During maintenance, first disconnect the detection circuit, loosen the connecting bolts of the top cover and clamping mechanism, and lift the top cover to remove the corrosion-resistant modules that need to be replaced one by one. After replacing the new module, reassemble in reverse order, and reconnect the detection circuit to restore service. The entire maintenance process requires no special tools and can be completed quickly on-site.

[0040] The sealing feed-through interface adopts a pressure self-tightening sealing structure to ensure sealing reliability under high-pressure conditions. All sealing elements in contact with materials are made of the same material as the corrosion-resistant module, ensuring the corrosion resistance of the entire system.

[0041] The embodiments described above are merely illustrative of certain implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A repairable, plastic-lined reactor for corrosive materials, characterized in that, The apparatus includes a vessel body (1) and a detachable inner liner assembled from multiple corrosion-resistant modules (3) within the vessel body (1). The bottom inner side of the vessel body (1) is provided with a bottom mounting groove (2) for supporting and positioning the corrosion-resistant modules (3). The upper inner side of the vessel body (1) is provided with a detachable clamping mechanism (4) for pressing and fixing the corrosion-resistant modules (3) from above. An independent detection cavity (5) is formed between the inner wall of the vessel body (1) and the back of each corrosion-resistant module (3). Each detection cavity (5) is provided with a conductive sensing sheet (6) that fits against the inner wall of the vessel body (1). Each conductive sensing sheet (6) is electrically connected to an external terminal block through an independent sealed feedthrough interface (7).

2. The repairable plastic-lined reactor for corrosive materials according to claim 1, characterized in that: The detachable clamping mechanism (4) is a detachable clamping ring connected to the vessel body (1) by bolts.

3. A repairable plastic-lined reactor for corrosive materials according to claim 2, characterized in that: A top sealing ring is pressed between the detachable pressure ring and the top of the corrosion-resistant module (3).

4. A repairable plastic-lined reactor for corrosive materials according to claim 1, characterized in that: The bottom of the bottom mounting groove (2) is covered with a bottom sealing gasket.

5. A repairable plastic-lined reactor for corrosive materials according to claim 1, characterized in that: The conductive sensing sheet (6) is a metal foil, a conductive rubber sheet, or a conductive coating formed by printing or spraying.

6. A repairable plastic-lined reactor for corrosive materials according to claim 1, characterized in that: A corrosion-resistant sealing element is provided at the joint between the corrosion-resistant modules (3).

7. A repairable plastic-lined reactor for corrosive materials according to claim 1, characterized in that: The joint edges of the corrosion-resistant module (3) are provided with mutually cooperating stepped or mortise-and-tenon structures.

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