Steam conveying device for mixed solvent separation and recovery system

Abstract

The utility model discloses a steam conveying device for a mixed solvent separation and recovery system, and belongs to the technical field of new electronic material preparation devices. Comprising a pipe body, a steam inlet, a steam outlet and a steam-water separator, a steam inlet and a steam outlet are formed in the pipe body; steam enters the pipe body from the steam inlet and then reaches the condenser from the steam outlet through the steam pipe body; a steam-water separator is arranged in the steam outlet; and the steam-water separator is used for separating water vapor doped in the steam, so that the steam passes through the steam outlet, and the water vapor is left in the pipe body. The utility model solves the problems that the recovery purity of the mixed solvent is influenced and the accuracy of the recovery rate is disturbed due to the fact that water vapor of other substances is mixed in mixed solvent steam when the mixed solvent is separated and recovered at present.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic new material preparation devices, and particularly relates to a steam conveying device for a mixed solvent separation and recovery system. Background Art

[0002] A mixture of propylene glycol methyl ether acetate (PGMEA) and propylene glycol methyl ether (PGME) is an excellent dilution and cleaning solvent used in the electronics industry. After dilution and cleaning, waste diluent containing substances such as PGMEA, PGME and water is produced. PGMEA and PGME form azeotropes with water. Therefore, after dilution and cleaning of electronic materials, the PGME+PGME mixed solvent needs to be recovered by distillation. The principle of distillation recovery is to heat the mixture to first vaporize the target solvent to form steam, and then cool and condense it through a condenser for recovery.

[0003] The mixture is heated in the heating equipment, and after the target solvent forms vapor, it passes through the steam delivery pipeline and finally reaches the condenser for condensation; the mixed solvent vapor entering the steam pipeline may be mixed with water vapor, because the mixed solvent must be vaporized when the heating temperature rises to a specific value, so that it enters the steam pipeline in the form of steam; therefore, most of the water vapor mixed in the solvent vapor is other substances; if the mixed solvent vapor carries this part of water vapor into the condenser and eventually forms condensed water, then the mixed solvent after condensation recovery will be mixed with other impurities; affecting the recovery purity of the mixed solvent, it will also be impossible to accurately quantify information such as the recovery rate of the mixed solvent. Utility Model Content

[0004] The utility model provides a steam conveying device for a mixed solvent separation and recovery system, wherein a steam-water separator is arranged on the steam outlet of the steam conveying pipeline; when the steam passes through the steam-water separator, its traveling direction is changed several times, so that the steam passes through the steam-water separator smoothly, while water vapor mixed in the steam is retained on the steam-water separator, thereby achieving the function of separating the steam from the steam and water; and improving the recovery purity of the mixed solvent; the utility model solves the problem that when the mixed solvent is currently separated and recovered, water vapor of other substances is mixed in the mixed solvent steam, which affects the purity of the mixed solvent recovery and interferes with the accuracy of the recovery rate.

[0005] In order to achieve the above technical objectives, the present invention is implemented through the following technical solutions:

[0006] A steam conveying device for a mixed solvent separation and recovery system comprises: a pipe body, a steam inlet, a steam outlet and a steam-water separator;

[0007] The pipe body is provided with a steam inlet and a steam outlet; steam enters the pipe body from the steam inlet, and then passes through the steam pipe body and reaches the condenser from the steam outlet;

[0008] A steam-water separator is provided in the steam outlet; the steam-water separator is used to separate water vapor mixed in the steam, so that the steam passes through the steam outlet, while the water vapor remains in the tube body.

[0009] Preferably, the steam-water separator comprises: an outer shell and a separation plate;

[0010] The outer shell is a cylindrical structure with openings at the upper and lower ends;

[0011] A plurality of separation plates are arranged on the inner wall of the outer shell at equal intervals and in a staggered manner;

[0012] The separation plate is arranged in an inclined downward direction;

[0013] The outer shell is directly placed in the steam outlet and maintains an interference fit with the steam outlet.

[0014] Preferably, a threaded structure is provided on the outer wall of the outer shell and the inner wall of the steam outlet;

[0015] The outer shell is screwed into the steam outlet through threaded engagement for installation.

[0016] Preferably, the bottom of the tube body is a drainage slope bottom;

[0017] A steam and water outlet is provided at the lowest point of the drainage slope bottom;

[0018] The upper end of the steam and water outlet is communicated with the tube body, and the lower end is located outside the tube body;

[0019] A detachable sealing plug is provided on the lower end of the soda outlet.

[0020] Preferably, a detachable filter basket is provided in the steam inlet;

[0021] The filter basket is used to filter granular impurities carried in the steam.

[0022] Preferably, the filter basket comprises: a basket body, a handle, and a filter net;

[0023] The basket body is a cylindrical structure; the upper and lower ends of the basket body are open structures;

[0024] The filter screen is arranged on the open structure at the lower end of the basket;

[0025] Insertion tubes are symmetrically arranged on both sides of the upper open structure of the basket body; both ends of the handle are movably arranged in the insertion tubes;

[0026] A thread is provided on the side wall of the basket body and close to the upper end surface of the basket body, and a thread structure is also provided on the inner wall of the steam inlet;

[0027] The filter basket is placed in the steam inlet and is installed in the steam inlet by screwing the filter basket in the steam inlet.

[0028] Preferably, a pressure monitor is provided on the pipe body, and the pressure monitor is used to monitor the steam pressure in the pipe body;

[0029] An electric pressure relief valve is provided on the pipe body;

[0030] The pressure monitor and the electric pressure relief valve are both communicatively connected to the PLC.

[0031] Preferably, a drain port is provided below the tube body.

[0032] Preferably, flanges are provided on the outer edges of the openings at both ends of the tube body;

[0033] The flange is provided with a sealing end in a detachable manner by means of screws and nuts;

[0034] The openings at both ends of the tube body are sealed by sealing ends.

[0035] Preferably, a support is provided below the tube body; the support is used to support the entire tube body.

[0036] The beneficial effects of the utility model are:

[0037] The utility model provides a steam outlet of a steam conveying pipe with a steam-water separator, wherein a plurality of separation plates arranged staggered and inclined downward are arranged at equal intervals in the steam-water separator; when the steam passes through the steam outlet, the passing direction will be changed several times due to the arrangement of the separation plates in the steam-water separator; in the process of the steam changing its traveling direction and passing through the steam-water separator, most of the steam and water in the steam will stay and adhere to these separation plates; these steam and water will then drip into the pipe body along the downward inclined separation plates; the steam and water in the mixed solvent steam will be separated by the steam-water separator, thereby improving the purity of the mixed solvent steam; thereby improving the recovery purity of the mixed solvent.

[0038] The bottom of the pipe body is set as the bottom of the drainage slope, and a steam and water outlet is set at the lowest point of the drainage slope bottom; the steam and water outlet is connected to the discharge drainage pipe; the steam and water separated from the mixed solvent vapor drip into the pipe body, and under the action of the drainage slope bottom, they are gathered at the steam and water outlet, which helps the steam and water to be quickly discharged from the pipe body.

[0039] A filter basket is provided in the steam inlet, which can filter out particulate impurities mixed in the mixed solvent steam, increase the purity of the steam entering the pipe body, and reduce the impurity content in the recovered mixed solvent.

[0040] A pressure monitor and an electric pressure relief valve are installed on the pipe body and are connected to the PLC. When the steam pressure in the pipe exceeds the safety threshold, the PLC receives the pressure information collected by the pressure monitor. The PLC sends a control instruction to the electric pressure relief valve, which relieves the steam pressure in the pipe to ensure the safety of the pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 This is a schematic diagram of the overall structure of the steam delivery pipe body and the outside of the utility model;

[0043] Figure 2 This is a schematic structural diagram of the main body of the steam delivery pipe of the utility model;

[0044] Figure 3 This is a structural diagram of a filter basket installed in a steam inlet of the utility model;

[0045] Figure 4 This is a schematic diagram of the filter basket structure of the utility model;

[0046] Figure 5 This is a structural diagram of a steam-water separator installed in the steam outlet of the utility model;

[0047] Figure 6 It is a structural schematic diagram of the separation plate arranged inside the steam-water separator of the utility model.

[0048] In the accompanying drawings, the structural names represented by the reference numerals are:

[0049] 1-tube body, 101-flange, 2-sealing end, 3-pressure monitor, 4-electric pressure relief valve, 5-steam inlet, 6-steam outlet, 7-support, 8-drain port, 9-bottom of drainage slope, 10-steam outlet, 11-filter basket, 1101-basket body, 1102-handle, 1103-filter screen, 1104-threaded structure, 12-steam separator, 1201-jacket shell, 1202-separation plate. DETAILED DESCRIPTION

[0050] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] Example 1

[0052] A steam conveying device for a mixed solvent separation and recovery system comprises: a pipe body 1, a steam inlet 5, a steam outlet 6 and a steam-water separator 12;

[0053] like Figure 1 As shown, both ends of the tube body 1 are open structures, and flanges 101 are set at the edges of the opening structures at both ends of the tube body 1. The sealing ends 2 are fixed on the flanges 101 by screws and nuts. The sealing ends 2 are used to seal the opening structures at both ends of the tube body 1, so that a closed space is formed inside the flanges for steam to pass through.

[0054] A support 7 is provided below the tube body 1 and near both sides of the tube body 1 ; the tube body 1 is placed on the support 7 , and the support 7 supports the tube body 1 .

[0055] A steam inlet 5 and a steam outlet 6 are provided above the tube body 1; the steam inlet 5 and the steam outlet 6 are both provided with cylindrical structures, the upper ends of which are both provided with open structures, and the lower ends are communicated with the interior of the tube body 1; a flange is provided on the upper end opening, and a pipeline is connected through the flange; the steam inlet 5 is connected to the distillation heating device through a pipeline, and the steam outlet 6 is connected to the condenser through a pipeline.

[0056] In this embodiment, one group of steam inlets 5 is provided and three groups of steam outlets 6 are provided; it is ensured that there are enough steam outlets 6 to discharge steam, and that the steam discharge flow rate is greater than the input flow rate, to avoid the steam input flow rate being greater than the steam discharge flow rate, causing steam to accumulate in the pipe body, thereby increasing the steam pressure in the pipe body 1.

[0057] The waste diluent of the mixed solvent of PGMEA, PGME and water is heated in the distillation heating equipment, wherein the mixed solvent first reaches the vaporization point, forms steam, enters the steam pipe, and then reaches the condenser through the steam pipe. After the condenser cools the mixed solvent steam, the mixed solvent steam condenses, and the recovery of the mixed solvent is completed; in the process of the mixed solvent forming steam and entering the tube body 1, it will inevitably carry water vapor, and the water vapor carried by the mixed solvent steam will pass through the steam pipe to the condenser together, and finally the solvent liquid formed by the condensation of the mixed solvent will mix with the water vapor, affecting the purity of the mixed solvent; therefore, since it is inevitable that the mixed solvent steam will carry water vapor, the water vapor in the mixed solvent steam can be separated out before the mixed solvent steam completely leaves the steam pipe.

[0058] like Figure 5 As shown, a steam-water separator 12 is detachably provided in the steam outlet 6. When the mixed solvent steam leaves the steam pipe from the steam outlet 6 and enters the condenser, it passes through the steam-water separator 12. The steam-water separator 2 is used to separate the steam and water in the mixed solvent.

[0059] like Figure 6 As shown, the steam-water separator 12 includes: an outer shell 1201 and a separation plate 1202;

[0060] The outer shell 1201 is a cylindrical structure with openings at the upper and lower ends and a hollow structure inside;

[0061] Several separation plates 1202 are arranged at equal intervals on the inner wall of the outer shell 1201. The separation plates 1202 do not interfere with each other, and the end of the separation plate 1202 located on the upper side projects onto the separation plate 1202 located below. The separation plates 1202 are arranged in a downwardly inclined direction. The outer shell 1201 needs to have a certain height to ensure that a sufficient number of separation plates 1202 can be distributed inside.

[0062] Place the outer shell 1201 directly into the steam outlet 6, with the outer wall of the outer shell 1201 fitting against the inner wall of the steam outlet 6, and with an interference fit between the outer shell 1201 and the steam outlet 6; this ensures that the outer shell 1201 is fixed in the steam outlet 6 and does not slide easily;

[0063] When the mixed solvent vapor doped with water vapor passes through the steam outlet 6, the steam will be changed in its traveling direction many times under the action of the separation plate 1202 arranged inside the steam-water separator 12; at the same time, the water vapor doped in the mixed solvent vapor contacts the separation plate 1202 in the process of changing its traveling direction, and most of the water vapor will be trapped on the separation plate 1202, while the mixed solvent vapor passes smoothly through the steam-water separator 12 and enters the condenser from the steam outlet 6; in this way, most of the steam and water doped in the mixed solvent vapor can be separated, thereby improving the purity of the mixed solvent; and the steam and water trapped on the surface of the separation plate 1202 will drip into the tube body 1 along the downwardly inclined separation plate 1202; the downwardly inclined separation plate 1202 can accelerate the sliding of the steam and water, and since the end of the upper separation plate 1202 is projected just on the lower separation plate 1202, the steam and water flowing down from the upper separation plate 1202 reaches the lower separation plate 1202, and finally drips into the tube body 1 layer by layer.

[0064] The outer shell 1201 of the steam-water separator 12 is directly plugged into the steam outlet 6. Although the outer wall of the outer shell 1201 and the inner wall of the steam outlet 6 maintain an interference fit, the steam-water separator 12 as a whole will not easily slide relative to the steam outlet 6; however, if the pressure of the steam ejected from the steam outlet 6 is too high, under the action of the impact force of the steam, the steam-water separator 12 may still slide in the steam outlet 6; therefore, as a preferred embodiment, a threaded structure is provided on the outer wall of the outer shell 1201 and the inner wall of the steam outlet 6; the outer shell 1201 is screwed into the steam outlet 6 by threaded fitting, and the steam-water separator 12 and the steam outlet 6 are installed and connected by threaded fitting, which can avoid the steam-water separator 12 from sliding under the action of strong steam pressure impact.

[0065] The water vapor separated by the steam-water separator 12 drips into the tube body 1 and eventually gathers at the bottom of the tube body 1. It is necessary to discharge this separated water vapor as quickly as possible to avoid it being carried away by the mixed steam. The discharged water vapor carries heat, which can be collected and reused. However, the bottom of the tube body 1 is a horizontal curved surface. Once the water vapor gathers at the bottom of the tube body 1, it has no fluidity, resulting in a slow discharge speed.

[0066] like Figure 1 or Figure 2 As shown, in this embodiment, the bottom of the tube body 1 is designed to be a drainage slope bottom 9; this drainage slope bottom 9 is equivalent to four triangular slope surfaces, and the tips of the four triangular slope surfaces converge at a point, which is the lowest point of the entire drainage slope bottom 9; water vapor dripping from the separation plate 1202 of the steam-water separator 12 drips onto the surface of the drainage slope bottom 9 and flows along the drainage slope bottom 9 to the lowest point;

[0067] A soda outlet 10 is provided at the lowest point of the drainage slope bottom 9; the upper end opening of the soda outlet 10 is provided on the surface of the drainage slope bottom 9 and communicates with the inside of the tube body 1; the lower end opening of the soda outlet 10 is located outside the tube body 1; the water vapor gathered at the lowest point of the drainage slope bottom 9 will be discharged from the soda outlet 10; a sealing plug is detachably provided on the lower end of the soda outlet 10; the sealing plug is removed, and a pipe is connected to the lower end of the soda outlet 10, so that the soda can be drained and collected.

[0068] like Figure 1 As shown, a drain port 8 is provided below the tube body 1 and close to one side of the tube body 1, the upper end opening of the drain port 8 is located inside the tube body 1 and communicates with the interior of the tube body 1; the lower end opening of the drain port 8 is located outside the tube body 1; the function of the drain port 8 is to open the drain port 8 after the operation is completed to completely discharge the residual steam and water vapor in the tube body 1; or to discharge the clean waste water after cleaning the interior of the tube body 1.

[0069] Example 2

[0070] Based on Example 1, the waste diluents of PGMEA, PGME, water and other substances may contain some material debris after the material is diluted; in the process of distilling and heating the mixed solvent to form steam, these material debris may be mixed in the mixed solvent steam; after these debris carried in the steam enter the steam pipe, they will adhere to the inner wall of the pipe, the steam inlet 5 and the steam outlet 6; some debris will also follow the mixed solvent steam into the condenser, and eventually be mixed in the recovered mixed solvent.

[0071] like Figure 3 As shown, in this embodiment, a filter basket 11 is detachably provided in the steam inlet 5 ; the filter basket 11 is used to filter granular impurities such as material debris carried in the steam.

[0072] like Figure 4 As shown, the filter basket 11 includes: a basket body 1101, a handle 1102, and a filter net 1103;

[0073] The basket body 1101 is cylindrical in structure; both the upper and lower ends of the basket body 1101 are open structures; a filter screen 1103 is provided on the lower open structure of the basket body 1101; inserts are symmetrically provided on both sides of the upper open structure of the basket body 1101; both ends of the handle 1102 are movably provided in the inserts; the handle 1102 can be raised or laid flat; the handle 1102 facilitates the placement of the entire filter basket into the steam inlet 5, and also facilitates the removal of the filter basket 11 from the steam inlet 5;

[0074] A threaded structure 1104 is provided near the upper end surface of the basket body 1101 and on the side wall of the basket body 1101, and a threaded structure is also provided on the inner wall of the steam inlet 5; the filter basket 11 is placed in the steam inlet 5, and the filter basket 11 is installed in the steam inlet 5 by screwing the threads together; the threaded engagement can make the filter basket 11 more securely installed in the steam inlet 5.

[0075] The mixed solvent steam enters the steam pipe from the steam inlet 5 and passes through the filter basket 11. The material debris in the mixed solvent steam will be filtered out by the filter mesh 1103, thereby improving the purity of the mixed solvent steam.

[0076] Example 3

[0077] Based on Example 1, since the interior of the tube body 1 is closed, steam enters the tube body 1 and accumulates, which will form steam pressure inside the tube body 1; the pressure needs to be controlled within a safety threshold range; once the steam pressure is too high, there may be a risk of explosion; therefore, a pressure gauge is usually provided on the steam pipe to monitor the pressure value; when the pressure value reaches a critical state, manual pressure relief is required to keep the pressure inside the tube body safe.

[0078] like Figure 1 or Figure 2 As shown, a pressure monitor 3 is installed on the pipe body 1 to monitor the steam pressure inside the pipe body 1. An electric pressure relief valve 4 is installed on the pipe body 1 next to the pressure monitor 3. Both the pressure monitor 3 and the electric pressure relief valve 4 are connected to a programmable logic controller (PLC). Safety threshold data for the pipe body pressure is input into the PLC. The pressure monitor 3 monitors the pressure inside the pipe body 1 in real time. If the pressure value inside the pipe body 1 reaches or exceeds the threshold, the PLC receives a dangerous pressure signal and sends a control command to the electric pressure relief valve 4. The electric pressure relief valve 4 opens and relieves pressure inside the pipe body 1 until the pressure returns to the safety threshold. The PLC then controls the electric pressure relief valve 4 to close. This allows for real-time monitoring of the pressure inside the pipe body 1 and automatic pressure reduction and regulation.

[0079] The pressure monitor is an existing product, and those skilled in the art can select a pressure monitor model that can be connected to the PLC port.

[0080] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0081] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, numerous modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A steam conveying device for a mixed solvent separation and recovery system, characterized in that: include: Pipe body, steam inlet, steam outlet and steam-water separator; The pipe body is provided with a steam inlet and a steam outlet; steam enters the pipe body from the steam inlet, and then passes through the steam pipe body and reaches the condenser from the steam outlet; A steam-water separator is provided in the steam outlet; The steam-water separator is used to separate water vapor mixed in the steam.

2. The steam conveying device for a mixed solvent separation and recovery system according to claim 1, characterized in that: The steam-water separator comprises: an outer shell and a separation plate; The outer shell is a cylindrical structure with openings at the upper and lower ends; A plurality of separation plates are arranged on the inner wall of the outer shell at equal intervals and in a staggered manner; The separation plate is arranged in an inclined downward direction; The outer shell is directly placed in the steam outlet and maintains an interference fit with the steam outlet.

3. The steam conveying device for a mixed solvent separation and recovery system according to claim 2, characterized in that: A thread structure is provided on the outer wall of the outer shell and the inner wall of the steam outlet; The outer shell is screwed into the steam outlet through threaded engagement for installation.

4. The steam conveying device for a mixed solvent separation and recovery system according to claim 1, characterized in that: The bottom of the tube body is a drainage slope bottom; A steam and water outlet is provided at the lowest point of the drainage slope bottom; The upper end of the steam and water outlet is communicated with the tube body, and the lower end is located outside the tube body; A detachable sealing plug is provided on the lower end of the soda outlet.

5. The steam conveying device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A detachable filter basket is provided in the steam inlet; The filter basket is used to filter granular impurities carried in the steam.

6. The steam conveying device for a mixed solvent separation and recovery system according to claim 5, characterized in that: The filter basket includes: a basket body, a handle, and a filter net; The basket body is a cylindrical structure; the upper and lower ends of the basket body are open structures; The filter screen is arranged on the open structure at the lower end of the basket; Insertion tubes are symmetrically arranged on both sides of the upper open structure of the basket body; both ends of the handle are movably arranged in the insertion tubes; A thread is provided near the upper end surface of the basket body and on the side wall of the basket body, and a thread structure is also provided on the inner wall of the steam inlet; The filter basket is placed in the steam inlet and is installed in the steam inlet by screwing the filter basket in the steam inlet.

7. The steam conveying device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A pressure monitor is provided on the pipe body, and the pressure monitor is used to monitor the steam pressure in the pipe body; An electric pressure relief valve is provided on the pipe body; The pressure monitor and the electric pressure relief valve are both communicatively connected to the PLC.

8. The steam conveying device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A drain port is provided below the tube body.

9. The steam conveying device for a mixed solvent separation and recovery system according to claim 1, characterized in that: Flanges are provided on the outer edges of the openings at both ends of the tube body; The flange is provided with a sealing end in a detachable manner by means of screws and nuts; The openings at both ends of the tube body are sealed by sealing ends.

10. The steam conveying device for a mixed solvent separation and recovery system according to claim 1, characterized in that: A support is provided below the tube body.

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