A process exhaust pipeline condensate drainage impurity removal device

Abstract

The utility model belongs to the field of exhaust duct, concretely is a kind of process exhaust duct condensation effluent impurity removing device. Including: flange, butterfly valve, cylinder, sight glass, vertical baffle, bottom baffle, blind plate, upper baffle, interface, gate valve, wherein cylinder is equipped with vertical baffle, bottom baffle and upper baffle, and cylinder is divided into impurity cavity and impurity-free cavity, and condensation effluent is filtered by bottom baffle and then flows into impurity-free cavity, and is discharged through first interface. Upper baffle is semicircular blind plate and is welded with certain gradient, and upper baffle, vertical baffle and bottom baffle are welded in the inside bottom baffle of cylinder, and the inside bottom baffle is semicircular perforated plate. The utility model can continuously remove impurities without closing process exhaust system, ensure effluent unobstructed, reduce maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust ducts, specifically a device for removing condensate and impurities from process exhaust ducts. Background Technology

[0002] Large integrated circuit chip factories have large exhaust volumes, and the negative pressure in the exhaust pipes makes them prone to drawing in impurities. The high impurity content in the exhaust condensate can easily clog drain traps and pipes. The main drawbacks of poor condensate drainage are: long-term accumulation of condensate in the exhaust pipes reduces the effective exhaust area, lowers exhaust volume, and affects environmental parameters such as cleanroom pressure differential and cleanliness; acidic or alkaline condensate can corrode exhaust pipes, valves, and fans, shortening the service life of the process exhaust system; organic solvent-based condensate is flammable, posing a significant safety hazard. Due to its chemical properties, clogging drain traps and pipes is difficult to clear, requires multiple safety precautions, and incurs high costs.

[0003] Currently, clearing water traps in process exhaust condensate drains and removing blockages in pipes requires cutting open the condensate drain pipe. This incision allows air to be drawn into the process exhaust pipe, affecting environmental parameters such as cleanroom differential pressure and cleanliness, and even impacting normal machine operation and product quality. Accurately locating blockages is difficult, sometimes requiring multiple pipe cuts to pinpoint the problem. Clearing blockages or replacing pipes is time-consuming, difficult, and costly. Clearing condensate drains containing corrosive acids, alkalis, or flammable organic solvents poses a high safety risk. The high frequency of impurity removal also leads to high maintenance costs. Therefore, there is an urgent need for an impurity removal device that can sustainably remove impurities, ensure unobstructed drainage, and reduce maintenance costs. Utility Model Content

[0004] To address the aforementioned technical issues, this invention proposes an impurity removal device for condensate drainage in process exhaust pipes. A baffle assembly within the cylinder divides the chamber into an impurity-containing chamber and an impurity-free chamber, utilizing gravity settling to achieve step-by-step interception of impurities. Forced drainage flows upwards after passing through the bottom baffle, and a reverse flow design combined with gravity enables secondary settling of small particulate impurities. A high-level drainage port combined with a water trap structure forms a water seal, effectively preventing backflow of air. Simultaneously, a visual monitoring port is provided to monitor the impurity height in real time, enabling proactive maintenance of the device.

[0005] To achieve the above objectives, the present invention specifically employs the following technical means:

[0006] A device for removing condensate and impurities from a process exhaust pipeline includes: a flange, a butterfly valve, a cylinder, a sight glass, a vertical partition, a bottom partition, a blind plate, an upper partition, an interface, and a gate valve. The cylinder is provided with a vertical partition, a bottom partition, and an upper partition, which divide the cylinder into an impurity-containing chamber and an impurity-free chamber. The condensate is filtered through the bottom partition and flows into the impurity-free chamber, and is discharged through the first interface.

[0007] Furthermore, the upper partition, vertical partition, and bottom partition are welded to the inside of the cylinder.

[0008] Furthermore, the upper partition is a semi-circular blind plate welded at a certain slope, and the bottom partition is a semi-circular perforated plate.

[0009] Furthermore, the flange is used to connect the cylinder and the valve.

[0010] Furthermore, the top of the cylinder is connected to a first butterfly valve via a flange, and the bottom is connected to a second butterfly valve via a flange; wherein the first butterfly valve is used to control the inflow of condensate drain liquid, and the second butterfly valve is used to open when impurities are removed.

[0011] Furthermore, a sight glass opening is provided on the side of the cylinder for observing the height of impurities inside the cylinder.

[0012] Furthermore, an interface is provided on the side of the cylinder, and the interface is connected to the drain pipe; the interface includes a first interface and a second interface, the first interface is located above the second interface, and the second interface is located at the bottom of the impurity-free chamber; the second interface is connected to a gate valve, which is used to discharge the remaining drain liquid in the cylinder before the impurity removal operation.

[0013] Furthermore, a blind flange is installed at the bottom outlet of the second butterfly valve.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] The inclined upper baffle welded inside the cylinder is set at a certain slope to effectively guide the flow of impurity-laden condensate towards the impurity-containing chamber. Simultaneously, the vertical obstruction of the vertical baffle and the horizontal interception of the small-aperture bottom baffle work together to construct a multi-level impurity separation system. Large particles of impurities naturally settle at the bottom of the impurity-containing chamber under gravity, while residual fine particles are intercepted as the liquid flows backward through the bottom baffle and then settle again under gravity. This multi-stage separation mechanism fundamentally blocks the path of impurities into the drainage pipe, ensuring the long-term stable operation of the drainage system.

[0016] The high-level drain interface is designed at the top of the impurity-free chamber, and together with the water trap structure of the external drain pipe, it forms a liquid seal barrier. While ensuring smooth drainage, it completely isolates air backflow, maintains stable negative pressure in the process exhaust system, and will not affect the cleanroom production environment parameters or the normal operation of the process exhaust system.

[0017] This device allows for easy and quick observation of the height of impurities inside the cylinder via the sight glass. When routine inspections reveal that impurities inside the cylinder have reached above the bottom edge of the sight glass, immediate notification is given to remove the impurities. The device is convenient and quick to operate, saving time, effort, and costs. It also ensures unobstructed drainage and extends the service life of exhaust pipes and fans.

[0018] The double sealing structure consisting of the double butterfly valve and the blind plate completely seals off the system passage when removing impurities: closing the inlet butterfly valve blocks gas exchange, the blind plate covers the slag discharge butterfly valve to eliminate the risk of leakage, and the low-position gate valve pre-emptively empties residual liquid, achieving zero gas interference and zero chemical splashing during maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present invention in use;

[0020] Figure 2 This is a structural schematic diagram of a specific embodiment of the present invention.

[0021] Numbers in the diagram:

[0022] 1. Flange; 2. First butterfly valve; 3. Cylinder; 4. Sight glass; 5. Vertical partition; 6. Bottom partition; 7. Second butterfly valve; 8. Blind flange; 9. Upper partition; 10. First port; 11. Second port; 12. Gate valve. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures, and should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions are omitted in the drawings.

[0025] Please see Figure 1 and Figure 2In this embodiment, the main body of the process exhaust pipe condensate drainage and impurity removal device is a cylinder 3, made of SUS316L BA material, with a height of 900 mm. Short pipe interfaces are welded to both ends and side walls of the cylinder. A DN200 manual butterfly valve 2, made of SUS316L BA material and equipped with a PTFE gasket, is connected to the top via flange 1. A DN200 manual butterfly valve 7, made of SUS316L BA material and equipped with a PTFE gasket, is connected to the bottom via flange 1. A blind flange 8, also made of SUS316L BA material and equipped with a PTFE gasket, is installed at the outlet of butterfly valve 7. A sight glass opening 4, welded with a DN100 interface, is located 40 cm above the bottom of the cylinder. The sight glass is selected according to the nature of the drained liquid; borosilicate glass or quartz glass is used for acidic or organic drained liquids, while aluminosilicate glass or PTFE-coated glass is used for alkaline drained liquids. The drain ports include a DN50 first port 10 at the top of the impurity-free chamber, with its bottom edge 650 mm from the bottom of the cylinder, and a DN40 second port 11 at the bottom of the impurity-free chamber, 450 mm from the bottom of the cylinder. The second port 11 is connected to a DN40 manual gate valve 12.

[0026] The interior of cylinder 3 is divided into an impurity-containing chamber and an impurity-free chamber by welding. The upper baffle 9, made of SUS316L BA material, is a semi-circular blind plate with a thickness of 1.5 mm and a radius of 10 cm, welded at a 50% slope to guide the impurity-containing drain liquid towards the impurity-containing chamber. The vertical baffle 5, also made of SUS316L BA material, is a vertical blind plate with a thickness of 1.5 mm, a height of 30 cm, and a width of 20 cm, connecting the upper baffle 9 to the bottom baffle 6. The bottom baffle 6, also made of SUS316L BA material, is a semi-circular perforated plate with a thickness of 1.5 mm, a radius of 10 cm, and 1 mm perforation, horizontally welded to the bottom of the cylinder to intercept impurities and allow the drain liquid to pass through.

[0027] The working principle of the condensate drainage and impurity removal device in the process exhaust pipeline is as follows:

[0028] Under normal operating conditions, the first butterfly valve 2 remains open, while the second butterfly valve 7 and gate valve 12 are both closed. When the process exhaust system is running, the condensate draining liquid in the pipeline carries impurities into the cylinder 3 through the open butterfly valve 2. Inside the cylinder, the draining liquid first undergoes a downward flow process, and most of the impurities are deposited in the impurity-containing cavity under gravity, completing the first settling process.

[0029] As the condensate drains continuously flow in, when the liquid level exceeds the bottom edge of the impurity-free chamber, due to the principle of water connectivity, the drained liquid in the impurity-containing chamber begins to enter the impurity-free chamber. At this time, the perforated plate structure at the bottom of the impurity-free chamber intercepts impurities that failed to deposit in the first deposition. These impurities settle again into the impurity-containing chamber under gravity, forming a second deposition.

[0030] Within the impurity-free chamber, the drain fluid flows from bottom to top. As the clean liquid rises to the height of interface 10, it flows through interface 10 into the drain pipe with a water trap, eventually draining into the main wastewater pipe. The water seal principle effectively prevents backflow of outdoor air into the drain pipe, ensuring that environmental parameters such as system exhaust airflow and cleanroom pressure differential remain unaffected.

[0031] When impurities accumulate to a certain level in the impurity chamber, the inspection personnel will observe through the sight glass 4 that the impurity height has reached the bottom edge of the sight glass, at which point the impurity removal operation needs to be initiated. The removal process begins by closing the butterfly valve 2 and opening the gate valve 12 to drain the condensate accumulated in the upper part of the cylinder 3. Subsequently, the operators use tools to disassemble the flange connection components of the blind flange 8 and remove the blind flange and gasket.

[0032] After preparation, the operator connects and secures the collection bucket equipped with a DN200 PFA hose to the bottom outlet of butterfly valve 7. After opening butterfly valve 7, impurities in the impurity chamber fall into the collection bucket through the hose. If impurities are found adhering to the cylinder wall, they can be gently tapped to dislodge them. After the cleaning operation is completed, butterfly valve 7 and gate valve 12 are closed, blind flange 8 is reinstalled, and finally butterfly valve 2 is opened to restore the unit to normal operation. Throughout the cleaning process, the drain pipe must be kept unobstructed while preventing outside air from entering the process exhaust system.

[0033] This device has high efficiency in removing impurities. During the impurity removal process, it does not require shutting down the process exhaust system and will not draw in outside air, thus maintaining the stability of the process exhaust system and process production operation.

[0034] The above embodiments are merely a detailed description of the present utility model. Any equivalent substitutions or improvements based on the spirit and essence of the present utility model are included within the protection scope of the present utility model.

Claims

1. A device for removing condensate and impurities from a process exhaust pipe, characterized in that, include: Flange (1), butterfly valve, cylinder (3), sight glass (4), vertical partition (5), bottom partition (6), blind plate (8), upper partition (9), interface, gate valve (12), wherein the cylinder (3) is provided with vertical partition (5), bottom partition (6) and upper partition (9), which divide the cylinder into impurity chamber and impurity-free chamber. The condensate flows into the impurity-free chamber after being filtered by the bottom partition (6), and is discharged through the first interface (10).

2. The process exhaust pipe condensate drainage impurity removal device according to claim 1, characterized in that, The upper partition (9), the vertical partition (5), and the bottom partition are welded to the inside of the cylinder (3).

3. The process exhaust pipe condensate drainage impurity removal device according to claim 1, characterized in that, The upper partition (9) is a semi-circular blind plate and is welded at a certain slope, and the bottom partition (6) is a semi-circular perforated plate.

4. The process exhaust pipe condensate drainage impurity removal device according to claim 1, characterized in that, The flange (1) is used to connect the cylinder (3) and the valve.

5. The process exhaust pipe condensate drainage impurity removal device according to claim 1, characterized in that, The top of the cylinder (3) is connected to the first butterfly valve (2) via flange (1), and the bottom is connected to the second butterfly valve (7) via flange (1); wherein the first butterfly valve (2) is used to control the inflow of condensate drain, and the second butterfly valve (7) is used to open when impurities are removed.

6. The process exhaust pipe condensate drainage impurity removal device according to claim 1, characterized in that, A sight glass (4) is provided on the side of the cylinder (3) for observing the height of impurities inside the cylinder.

7. The process exhaust pipe condensate drainage impurity removal device according to claim 1, characterized in that, An interface is provided on the side of the cylinder (3), and the interface is connected to the drain pipe; the interface includes a first interface (10) and a second interface (11), the first interface (10) is located above the second interface (11), and the second interface (11) is located at the bottom of the impurity-free chamber; the second interface (11) is connected to a gate valve (12), and the gate valve (12) is used to discharge the remaining drain liquid in the cylinder (3) before the impurity removal operation.

8. The process exhaust pipe condensate drainage impurity removal device according to claim 5, characterized in that, The bottom outlet of the second butterfly valve (7) is equipped with a blind flange (8).

Images