Device for collecting backflow acid liquor of acid discharge pipe of diffusion equipment

Abstract

The utility model discloses a device for collecting reflux acid liquor of an acid discharge pipe of diffusion equipment, which belongs to the technical field of chemical equipment and comprises a liquid collecting cabin, an acid discharge pipe is vertically mounted at the top of the liquid collecting cabin, and a flange connecting seat is arranged on the side wall of the acid discharge pipe; a pressure pre-tightening safety protection mechanism is arranged on the outer wall of one side of the liquid collecting cabin, and a corrosion-resistant ball valve is mounted at the bottom of the opposite side of the liquid collecting cabin; a pipe fitting mounting groove with a sealing structure is formed in the top of the liquid collecting cabin, and an annular gasket groove and a sealing ring are arranged on the inner bottom surface of the liquid collecting cabin; efficient collection and controllable discharge of the acid liquor are realized through a three-step flow guide structure, a V-shaped flow guide surface and a pressure pre-tightening safety mechanism in the liquid collection cabin; the non-contact liquid level monitoring unit improves the safety, and the modular design reduces the cost; the device is suitable for acid liquor recovery in the field of chemical engineering, and has the advantages of leakage prevention, thorough discharge and easiness in maintenance.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to an acid recovery device for diffusion equipment, and more particularly to an acid collection device vertically installed at the bottom of an acid discharge pipe, which can efficiently recover and safely discharge refluxed acid. Background Technology

[0002] In the field of chemical equipment operation and maintenance, the recovery and treatment of acidic media is always a critical link. Existing technologies for acid collection devices using acid drain pipes generally suffer from three major technical bottlenecks: First, the single-stage guide structure design is simplistic: traditional devices only use a single-layer guide channel, resulting in uneven velocity distribution of the acid flowing on a single guide surface, forming local vortex regions (velocity differences > 30%). This leads to a 3%-8% residue rate on the inner wall of the chamber, and after long-term operation, the residual acid crystallizes and clogs the pipeline. Second, there is a lack of synergistic optimization between the guide surface and the collection structure: although existing technologies have attempted to use V-shaped guide surfaces, they are not used in conjunction with multi-stage guide channels, resulting in more than 5% acid residue remaining at the end of the guide surface. Third, the synergistic effect of structural combinations is lacking: the combined design of multi-stage guide structures and asymmetric guide surfaces has not been reported, and existing technologies have failed to achieve complete acid diversion through the synergistic effect of stepped guides and V-shaped guide surfaces. Even more serious is the lack of an active pressure regulation mechanism in existing equipment. When the instantaneous pressure of acid reflux exceeds 0.8 MPa, it can easily cause a chamber explosion, posing a significant safety hazard. Studies have shown that the overall recovery efficiency of traditional equipment is less than 75%, and the annual maintenance cost is as high as 40% of the equipment investment, severely restricting the continuity and safety of industrial production.

[0003] Therefore, there is an urgent need for an acid collection device that is simple in structure, requires no external energy, and can adapt to various working conditions in order to achieve efficient and safe acid recovery and discharge. Utility Model Content

[0004] 1. Technical problem to be solved:

[0005] In view of the problems existing in the prior art, this utility model aims to solve the problems of incomplete acid reflux collection, inconvenient discharge and leakage risk in the prior art.

[0006] 2. Technical Solution:

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A device for collecting acid reflux from an acid drain pipe of a diffusion device includes a collection chamber, an acid drain pipe is vertically installed on the top of the collection chamber, and a flange connection seat is provided on the side wall of the acid drain pipe;

[0009] The outer wall of one side of the liquid collection tank is equipped with a pressure pre-tightening safety protection mechanism, and a corrosion-resistant ball valve is installed at the bottom of the opposite side.

[0010] The top of the liquid collection tank is provided with a pipe fitting installation groove with a sealing structure, and the inner bottom surface is provided with an annular gasket groove and a sealing ring.

[0011] The liquid collection chamber is equipped with three layers of guide channels arranged vertically, with a height difference of 50-80mm between each pair. The bottom of the chamber forms a V-shaped guide surface facing the drain outlet, which is symmetrically composed of two liquid collection plates with a 60° inclination angle.

[0012] The liquid collection tank has a non-contact liquid level monitoring unit embedded in its side wall.

[0013] A further improvement is that the cross-section of the guide channel is an isosceles trapezoidal structure;

[0014] The drain port is connected to a corrosion-resistant ball valve via a socket-type sealing joint.

[0015] A further improvement is that the non-contact liquid level monitoring unit includes an ultrasonic liquid level gauge with a range of 0-500mm and a measurement accuracy of ±2mm.

[0016] The probe of the ultrasonic level gauge is located 300±5mm from the bottom of the side wall of the chamber and meets the IP68 protection level.

[0017] A further improvement is that the pressure preload safety protection mechanism includes:

[0018] An insertion assembly integrated into the vertically spaced area of ​​two adjacent flow channels includes a coaxial pressure cylinder assembly connected to an insertion interface on the side wall of the liquid collection tank. The coaxial pressure cylinder assembly is composed of a first cylinder, a second cylinder, and a pressure relief cylinder connected in sequence.

[0019] An adjustable sealing assembly includes a hollow connecting rod that passes through the connection end of the first cylinder and the second cylinder. One end of the connecting rod is welded with a sealing plug that mates with the air inlet of the first cylinder, and the other end is fixed by a first limiting plate.

[0020] The dynamic pressure adjustment module includes a guide rod disposed in the second cylinder, one end of which extends into the inner cavity of the hollow connecting rod, and the other end is fixedly connected to a second limiting plate. A preload spring is sleeved on the outside of the guide rod, and its two ends abut against the first limiting plate and the second limiting plate respectively. An electric push rod is connected to the second limiting plate, and the stroke direction of the output end of the electric push rod coincides with the axis of the guide rod.

[0021] A further improvement is that the elastic coefficient of the preload spring is 50 N / mm ± 5%, and the compression stroke is 0-80 mm;

[0022] The electric push rod is driven by a stepper motor with an IP65 protection rating, and the push stroke accuracy is ±0.1mm.

[0023] 3. Beneficial effects:

[0024] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0025] (1) Significantly improved acid recovery efficiency: Through the synergistic design of a three-stage isosceles trapezoidal guide channel (cross-sectional dimensions 50×30×20mm) and a V-shaped double-sloping guide surface (angle 120°), the uniformity of acid flow velocity distribution is improved from 58% in the traditional device to 82%, and the three-stage guide structure reduces the liquid impact force by 47%. The symmetrically arranged 60° inclined liquid collection plates at the bottom of the tank form a vortex suppression zone, which, together with the socket-type sealing joint (leakage rate <0.1L / min), achieves efficient flow guidance. Fluent simulation verification shows that this structure reduces the acid residue to 0.5% (compared to ≥2.5% in the traditional device), and increases the annual recovery volume by 23.5%.

[0026] (2) Enhanced Dynamic Pressure Regulation Capability: A pressure balance system is innovatively implemented, linking a pre-tensioned spring (elastic coefficient 50N / mm±5%) with an electric actuator (IP65 protection, stroke accuracy ±0.1mm), creating a wide pressure range of 0-1.2MPa. When the chamber pressure > 0.8MPa, the dynamic adjustment module automatically triggers a pressure relief response, with a pressure relief rate of 2.3MPa / s, 1.8 times higher than traditional safety valves. After 1500 burst pressure tests, the chamber's pressure limit is increased to 1.5MPa, improving the safety factor by 300%.

[0027] (3) Intelligent monitoring and sealing performance upgrade: The ultrasonic level gauge (range 0-500mm, accuracy ±2mm, IP68 protection) and the annular gasket groove sealing structure enable non-contact real-time monitoring. The probe is installed 300mm from the bottom to avoid the sediment interference area, reducing the detection blind zone to ±5mm. The corrosion-resistant ball valve (PTFE seal) and flange connection seat (HG / T20592 standard) adopt a modular design, with a sealing specific pressure of 25MPa / cm², extending the maintenance cycle to 24 months and reducing the leakage risk to 0.3% / year.

[0028] (4) Industrial adaptability and economic optimization: Standardized flange interfaces (DN100-DN300) support rapid connection of acid pipes of various specifications, and the three-dimensional adjustable support structure (adjustment range ±30°) adapts to complex working conditions. According to ANSYS fatigue life prediction, the service life of core components is >100,000 cycles. Compared with traditional equipment, the annual maintenance cost is reduced by 62%.

[0029] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the internal structure of the liquid collection tank of this utility model;

[0032] Figure 3 This is a schematic diagram of the explosion structure of the pressure pre-tightening safety protection mechanism of this utility model;

[0033] Figure 4 This is a schematic diagram of the pressure pre-tightening safety protection mechanism of this utility model during pressure relief.

[0034] Explanation of the labels in the diagram:

[0035] 1. Liquid collection tank; 11. Pipe fitting installation groove; 12. Annular gasket groove; 13. Flow guide groove; 14. Drain outlet; 15. Liquid collection plate; 16. Ultrasonic level gauge;

[0036] 2. Acid drain pipe; 3. Flange connection seat;

[0037] 4. Pressure preload safety protection mechanism; 41. Insertion interface; 42. First cylinder; 43. Second cylinder; 44. Pressure relief cylinder; 45. First limiting plate; 46. Hollow connecting rod; 47. Sealing plug; 48. Second limiting plate; 49. Guide rod; 410. Preload spring; 411. Electric push rod;

[0038] 5. Ball valve. Detailed Implementation

[0039] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0043] A device for collecting reflux acid from the acid drain pipe of a diffusion device includes a collection chamber 1, wherein the collection chamber 1 has the following structure:

[0044] A vertically installed acid drain pipe 2 is provided on the top, and a flange connection seat 3 is provided on its side wall;

[0045] A pressure-pre-tightening safety protection mechanism 4 is installed on one side of the outer wall, and a corrosion-resistant ball valve 5 is installed on the bottom of the opposite side.

[0046] The top is provided with a pipe fitting installation groove 11 with a sealing structure, and the inner bottom surface is provided with an annular gasket groove 12 and a sealing ring; the annular gasket groove is 5mm deep and 8mm wide, and the sealing ring is made of fluororubber (FKM).

[0047] The interior is equipped with three layers of guide channels 13 arranged vertically, with a height difference of 50-80mm between each pair. The bottom of the tank forms a V-shaped guide surface facing the drain port 14, which is symmetrically composed of two 60° inclined liquid collection plates 15.

[0048] A non-contact liquid level monitoring unit is embedded in the side wall.

[0049] Details of the flow guiding structure, such as Figure 2 As shown:

[0050] The cross-sections of the three-layered guide channels 13 arranged sequentially are all isosceles trapezoids, with an upper base width of 50±0.5mm, a lower base width of 30±0.5mm, and a channel depth of 20±0.2mm; the cross-sections of the guide channels can also be trapezoidal or other symmetrical shapes, and the dimensions can be adjusted according to the acid flow rate.

[0051] Fluent simulations verified that the three-stage flow channel improved the acid flow velocity distribution uniformity from 58% to 82%.

[0052] When the V-shaped pool has an included angle of 120°, the residual liquid volume is ≤0.5% compared to the traditional structure, which has a volume ≥2.5%.

[0053] The drain port 14 is connected to the corrosion-resistant ball valve 5 via a socket-type sealing joint.

[0054] Liquid level monitoring unit, such as Figure 2 As shown:

[0055] Includes 16 ultrasonic level gauges, with a range of 0-500mm and a measurement accuracy of ±2mm;

[0056] The probe is located 300±5mm from the bottom of the side wall of the cabin, which meets the IP68 protection level.

[0057] Security protection organizations, such as Figure 2-4 As shown:

[0058] The plug-in assembly is integrated into the vertically spaced area of ​​two adjacent stepped flow guide structures, including a first cylinder 42, a second cylinder 43, and a pressure relief cylinder 44 of the coaxial pressure cylinder assembly;

[0059] The adjustable sealing assembly includes a hollow connecting rod 46 and a sealing plug 47;

[0060] The dynamic pressure adjustment module includes a preload spring 410 with an elastic coefficient of 50N / mm±5% and a compression stroke of 0-80mm, and an electric push rod 411 with an IP65 protection rating and a stroke accuracy of ±0.1mm.

[0061] Installation steps:

[0062] The liquid collection chamber 1 is vertically fixed to the bottom of the acid drain pipe through the pipe fitting installation groove 11, and the sealing ring ensures that the connection is sealed.

[0063] A corrosion-resistant ball valve 5 is connected to one side of the bottom of the liquid collection tank 1 via a socket joint;

[0064] Operating procedures:

[0065] When the acid is refluxed, it flows into the collection chamber through the acid discharge pipe 2 and is guided to the V-shaped guide surface by the stepped guide structure 13.

[0066] By using the principle of ultrasonic pulse reflection, the height of acid in the collection device is measured in real time. The probe is installed on the side wall of the chamber 300mm from the bottom, which can avoid interference from possible sediment at the bottom and ensure that monitoring is triggered at the lowest liquid level in the early stage of acid reflux, providing a data basis for subsequent control.

[0067] When the liquid level approaches the top of the collection device, such as when it approaches the 500mm range limit, the sensor sends a signal to the control system to trigger an audible and visual alarm or automatically close the acid valve to prevent acid overflow and safety accidents.

[0068] Open ball valve 5, and the acid solution will be discharged into the designated container through drain port 14.

[0069] Meanwhile, before operation, to prevent the pressure inside the chamber from exceeding the threshold, personnel can drive the electric push rod 411 in advance to cause the second limiting plate 48 to press against the pre-tightening spring 410, so that the first limiting plate 45 and the sealing plug 47 are further stressed. According to the pre-tightening force of the pre-tightening spring 410, the maximum pressure of the liquid collection chamber 1 is adjusted. For example, when the pressure inside the liquid collection chamber 1 is the limit value, its pressure gives the sealing plug 47 a certain rebound force, thereby driving the first limiting plate 45 to move towards the second limiting plate 48 in the reverse direction, so that the air inlet of the first cylinder 42 is cleared, thereby discharging other air into the pressure relief cylinder 44 and avoiding safety hazards caused by excessive pressure.

[0070] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for collecting backflow acid liquid of acid discharge pipe of diffusion equipment, comprising a liquid collecting cabin (1), characterized in that: The acid discharge pipe (2) is vertically installed on the top of the liquid collecting tank (1), and the side wall of the acid discharge pipe (2) is provided with a flange connecting seat (3); The pressure pre-tightening safety protection mechanism (4) is arranged on one side of the outer wall of the liquid collecting tank (1), and the corrosion-resistant ball valve (5) is arranged on the opposite side of the bottom of the liquid collecting tank (1); The pipe fitting mounting groove (11) with a sealing structure is arranged on the top of the liquid collecting tank, the inner bottom surface of the pipe fitting mounting groove (11) is provided with an annular gasket groove (12) and a sealing ring; The liquid collecting tank is internally provided with three layers of flow guide grooves (13), the flow guide grooves (13) are arranged in a stepped structure, vertical spacing regions are formed between adjacent flow guide grooves (13), and a V-shaped flow guide surface facing the liquid discharge port (14) is formed on the bottom of the tank, the V-shaped flow guide surface is symmetrically composed of two liquid collecting plates (15) with an inclination angle of 60°; The side wall of the liquid collecting tank (1) is embedded with a non-contact liquid level monitoring unit.

2. The device for collecting the backflow acid liquid of the acid discharge pipe of the diffusion equipment according to claim 1, characterized in that: The cross section of the flow guide groove (13) is in an isosceles trapezoidal structure; The liquid discharge port (14) is connected with the corrosion-resistant ball valve (5) through a socket type sealing joint.

3. The device for collecting the backflow acid liquid of the acid discharge pipe of the diffusion equipment according to claim 1, characterized in that: The non-contact liquid level monitoring unit comprises an ultrasonic liquid level meter (16), and the probe of the ultrasonic liquid level meter (16) is located at a position 300 mm away from the bottom of the side wall of the tank body.

4. The device for collecting the backflow acid liquid of the acid discharge pipe of the diffusion equipment according to claim 1, characterized in that: The pressure pre-tightening safety protection mechanism (4) comprises: A plug-in assembly integrated in the vertical spacing region between the two adjacent flow guide grooves (13) comprises a coaxial pressure cylinder group connected with the plug-in port (41) of the side wall of the liquid collecting tank (1), and the coaxial pressure cylinder group is composed of a first cylinder body (42), a second cylinder body (43) and a pressure relief cylinder (44) connected in sequence; An adjustable sealing assembly comprises a hollow connecting rod (46) penetrating through the connecting ends of the first cylinder body (42) and the second cylinder body (43), one end of the connecting rod is welded with a sealing plug (47) matched with the air inlet of the first cylinder body, and the other end is fixed through a first limiting disc (45); A dynamic pressure adjusting module comprises a guide rod (49) arranged in the second cylinder body (43), one end of the guide rod (49) extends into the inner cavity of the hollow connecting rod (46), the other end of the guide rod (49) is fixedly connected with a second limiting disc (48), a pre-tightening spring (410) is sleeved outside the guide rod (49), the two ends of the pre-tightening spring (410) abut against the first limiting disc (45) and the second limiting disc (48) respectively, and an electric push rod (411) connected with the second limiting disc (48) is arranged.

5. The device for collecting the backflow acid liquid of the acid discharge pipe of the diffusion equipment according to claim 4, characterized in that: The elastic coefficient of the pre-tightening spring (410) is 40-60 N / mm, and the compression stroke is 0-80 mm; The electric push rod (411) is driven by an IP65 protection grade stepping motor, and the push stroke accuracy is ±0.1 mm.

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