Supercritical extraction post-treatment device

Abstract

The utility model relates to the field of supercritical extraction, in particular to a supercritical extraction post-treatment device. Comprising a kettle body, a top cover and a pretreatment ventilation pipe, an alkaline filter plate is arranged on the pretreatment ventilation pipe in the structure, and the alkaline filter plate is obliquely arranged, so that the contact area between the alkaline filter plate and acid mist is increased, the treatment speed and effect of acid mist pretreatment are improved, and the acid mist is sprayed by combining a spraying pipe, so that the acid mist pretreatment efficiency is improved. According to the acid mist treatment device, the mode that pretreatment and spraying treatment are combined is adopted, the acid mist treatment effect is improved, finally, the filter block is further installed on the lower portion of the exhaust pipeline, further adsorption and filtration before exhaust are achieved, the possibility that neutralization is incomplete and acid mist which is not fully neutralized is directly discharged is avoided, and it is ensured that emission reaches the standard. A sealing groove and a sealing strip are further arranged on the inner wall of the square pipe, the sealing performance between the alkaline filter plate and the inner wall of the pretreatment ventilation pipe is improved through the sealing strip, and it is ensured that acid mist entering the kettle body from the air inlet pipeline is pretreated through the alkaline filter plate.

Description

Technical Field

[0001] This utility model relates to the field of supercritical extraction, and in particular to a supercritical extraction post-processing device. Background Technology

[0002] In the post-processing of supercritical fluid extraction of pharmaceuticals, the pH value of the extract is often adjusted with dilute sulfuric acid to meet the requirements of subsequent processes (such as crystallization and separation) or product quality. This process generates sulfuric acid mist, which will cause environmental pollution if directly emitted. Therefore, the acid mist needs to be treated to meet the standards before being emitted.

[0003] Existing patent CN202322156496.9 provides an acid mist absorption device, including a cylinder, a cross-shaped gas distribution pipe is provided in the middle of the cylinder, an acid mist inlet is provided at one end of the cross-shaped gas distribution pipe, a perforated plate is provided above the cross-shaped gas distribution pipe, a solid sodium hydroxide layer is provided on the perforated plate, a detachable top cover is provided above the fixed sodium hydroxide layer, an exhaust port connected to the cylinder is provided in the middle of the detachable top cover, a bottom plate is provided at the bottom of the cylinder, a water collection plate is provided above the bottom plate, the water collection plate is inclined, and a waste liquid discharge port is provided above the connection between the inclined water collection plate and the inner side wall of the cylinder.

[0004] However, the above structure still has the following defects: the neutralization of acid mist is achieved by only a solid sodium hydroxide layer. However, the contact area between the solid sodium hydroxide and the acid mist is limited, the reaction rate is slow, resulting in incomplete neutralization and unsatisfactory acid mist treatment effect. At the same time, there may be cases where unneutralized acid mist is directly discharged, affecting the emission compliance. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a supercritical extraction post-processing device.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a supercritical extraction post-processing device, the innovation of which lies in: including

[0007] A vessel body with an opening at the top, an air inlet pipe on its side near the bottom, and a liquid drain pipe at the bottom;

[0008] A top cover is horizontally positioned on the top of the vessel body, and an exhaust pipe is also provided on it;

[0009] A pretreatment vent pipe is horizontally installed inside the vessel body. An air inlet is provided on one side of the pretreatment vent pipe, and the air inlet is connected to the air inlet pipe. An alkaline filter plate is provided on the pretreatment vent pipe. The alkaline filter plate is inclined downward, with its higher side positioned above the air inlet and its lower side penetrating into the pretreatment vent pipe and positioned on the side of the pretreatment vent pipe away from the air inlet. Several vent holes are also provided at the top of the pretreatment vent pipe.

[0010] Furthermore, the pretreatment vent pipe includes a square pipe, and a first sealing plate and a second sealing plate are respectively sealed and fixed on both sides of its length, and the first sealing plate is arranged close to the air inlet pipe.

[0011] The air inlet is located in the middle of the first sealing plate. Above the air inlet, the first sealing plate is also provided with an installation opening for the alkaline filter plate to pass through. A limiting groove is provided at the bottom corner of the inner side of the second sealing plate. The lower side of the alkaline filter plate extends into the square tube from the installation opening and is engaged in the limiting groove.

[0012] Furthermore, both the first sealing plate and the second sealing plate are arc-shaped plates that fit against the inner wall of the vessel.

[0013] Furthermore, sealing grooves are provided on both sides of the width of the alkaline filter plate on the inner wall of the square tube. Sealing strips are installed in the sealing grooves. The sealing strips improve the sealing performance between the alkaline filter plate and the inner wall of the pretreatment air pipe, ensuring that the acid mist entering the reactor from the air inlet pipe has been pretreated by the alkaline filter plate, thereby improving the overall acid removal effect.

[0014] The vessel body is provided with a channel that can just accommodate the alkaline filter plate to be inserted at an angle, and the channel and the installation port are also provided with sealing strips to prevent acid mist from leaking and contaminating the installation port and the channel.

[0015] Furthermore, a support block is provided inside the square tube to provide stable support for the alkaline filter plate.

[0016] Furthermore, it also includes a spray pipe, which is located inside the reactor body and above the pretreatment vent pipe. It is connected to an alkali tank and a clean water tank through a conveying pipe. The alkali solution is used to fully neutralize the acid mist after pre-neutralization treatment by the alkaline filter plate, thereby improving the acid mist treatment quality. The clean water tank can also be used to clean the upper surface of the pretreatment vent pipe and the vent holes. In this case, a drain hole needs to be opened at the bottom end of the square tube and an electromagnetic drive valve needs to be installed. The electromagnetic drive valve is opened during cleaning and closed during normal operation when removing acid mist.

[0017] The bottom of the spray pipe is provided with multiple first nozzles and multiple second nozzles. The first nozzles are located at the middle of the bottom end of the spray pipe and face the vent hole. The second nozzles are located on the periphery of the bottom end of the spray pipe and face the periphery of the vent hole. The first nozzles are used to neutralize and spray acid mist guided by the vent hole, and the second nozzles are used to neutralize and spray acid mist scattered on the periphery above the vent hole, thereby improving the completeness and effectiveness of acid mist neutralization and spraying.

[0018] Furthermore, an exhaust channel is provided on the top cover, an exhaust pipe is installed in the upper part of the exhaust channel, and a filter block is installed in the lower part of the exhaust channel.

[0019] Furthermore, the filter block is T-shaped, including a wider upper section and a narrower lower section. The exhaust channel consists of an upper cylindrical mounting section, a middle cylindrical mounting section, and a lower cylindrical section that are coaxially connected. The diameter of the middle cylindrical mounting section is larger than that of the lower cylindrical section, and the diameter of the lower cylindrical section is larger than that of the upper cylindrical mounting section. The middle and lower cylindrical sections together accommodate the filter block, while the upper cylindrical mounting section accommodates the exhaust pipe. Before exhaust, the filter block is used for further adsorption and filtration. At the same time, setting the diameter of the lower cylindrical section to be larger than that of the upper cylindrical mounting section avoids pushing the filter block downwards or even detaching it from the exhaust pipe during installation, thus improving the structural stability.

[0020] The advantages of this utility model are:

[0021] The pretreatment vent pipe in this structure is equipped with an alkaline filter plate, which is tilted to increase the contact area between the alkaline filter plate and the acid mist, thereby improving the treatment speed and effect of acid mist pretreatment. Combined with the spray pipe to spray the acid mist, the combination of pretreatment and spray treatment improves the acid mist treatment effect. Finally, a filter block is installed at the bottom of the exhaust pipe to achieve further adsorption and filtration before exhaust, avoiding the possibility of incomplete neutralization and the direct discharge of unneutralized acid mist, ensuring that emissions meet standards.

[0022] Sealing grooves are provided on both sides of the width of the alkaline filter plate on the inner wall of the square tube. Sealing strips are installed in the sealing grooves. The sealing strips improve the sealing performance between the alkaline filter plate and the inner wall of the pretreatment air pipe, ensuring that the acid mist entering the reactor from the air inlet pipe has been pretreated by the alkaline filter plate, thus improving the overall acid removal effect.

[0023] The vessel body is equipped with a channel that can just accommodate the alkaline filter plate to be inserted at an angle, and the channel and the installation port are also equipped with sealing strips to prevent acid mist from leaking and contaminating the vessel body.

[0024] One spray pipe is connected to the alkali tank and the clean water tank through a delivery pipeline. The alkali solution is used to fully neutralize the acid mist after it has passed through the alkaline filter plate for pre-neutralization, thereby improving the quality of acid mist treatment. The clean water tank can also be used to clean the upper surface of the pre-treatment vent pipe and the vent holes. At this time, a drain hole needs to be opened at the bottom of the square pipe and an electromagnetic drive valve needs to be installed. The electromagnetic drive valve is opened when cleaning and closed when the acid mist removal is in normal operation. Attached Figure Description

[0025] Figure 1 A cross-sectional view of this utility model Figure 1 .

[0026] Figure 2 A cross-sectional view of this utility model Figure 2 . Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] like Figure 1-2 The supercritical extraction post-processing device shown includes a vessel body 1, a top cover 2, a pretreatment vent pipe 3, and a spray pipe 4.

[0029] The top of the vessel body 1 is open, and an air inlet pipe 11 is provided on its side near the bottom. Its bottom is inverted cone shape and a drain outlet and a drain pipe 12 are provided at its center. The vessel body 1 is provided with a channel that can just accommodate the alkaline filter plate 5 to be inserted at an angle, and a sealing strip is provided in the channel.

[0030] The top cover 2 is horizontally positioned on the top of the vessel body 1, and an exhaust pipe 21 is also provided on it.

[0031] An exhaust channel is opened on the top cover 2. An exhaust pipe 21 is installed in the upper part of the exhaust channel, and a filter block 23 is installed in the lower part of the exhaust channel.

[0032] The filter block 23 is a T-shaped alkaline filter block 23, including an upper wide section and a lower narrow section. The exhaust channel is a coaxial and interconnected upper cylindrical mounting section, a middle cylindrical mounting section and a lower cylindrical section. The diameter of the middle cylindrical mounting section is larger than the diameter of the lower cylindrical section, and the diameter of the lower cylindrical section is larger than the diameter of the upper cylindrical mounting section. The middle cylindrical mounting section and the lower cylindrical section together accommodate the filter block 23, and the upper cylindrical mounting section accommodates the exhaust pipe 21.

[0033] Before exhaust, filter block 23 is used to achieve further adsorption and filtration. At the same time, the diameter of the lower cylindrical section is set to be larger than the diameter of the upper cylindrical installation section, which avoids the filter block 23 being pushed downward or even detached from the exhaust pipe 21 when installing the exhaust pipe 21, thus improving the stability of the structure.

[0034] Two limiting blocks 13 are also installed inside the vessel body 1. The pretreatment vent pipe 3 is horizontally installed inside the vessel body 1 and is located at the top of the limiting block 13. An air inlet is provided on one side of the pretreatment vent pipe 3, and the air inlet is connected to the air inlet pipe 11. An alkaline filter plate 5 is provided on the pretreatment vent pipe 3. The alkaline filter plate 5 is inclined downward, and its higher side is located above the air inlet. Its lower side penetrates into the pretreatment vent pipe 3 and is located on the side of the pretreatment vent pipe 3 away from the air inlet.

[0035] The pretreatment vent pipe 3 includes a square pipe 31, and a first sealing plate 32 and a second sealing plate 33 are respectively sealed and fixed on both sides of its length. The first sealing plate 32 and the second sealing plate 33 are both arc-shaped plates that fit against the inner wall of the vessel body 1, and the first sealing plate 32 is set close to the air inlet pipe 11.

[0036] The top of the square tube 31 is provided with several vent holes, and a drain hole 35 is also provided at the bottom of the square tube 31. An outlet pipe is installed outside the square tube 31 at the drain hole 35, and an electromagnetic drive valve is installed on the outlet pipe.

[0037] The air inlet is located in the middle of the first sealing plate 32. Above the air inlet, the first sealing plate 32 is also provided with an installation port for the alkaline filter plate 5 to pass through. A limiting groove is provided at the bottom corner of the inner side of the second sealing plate 33. The lower side of the alkaline filter plate 5 extends into the square tube 31 from the installation port and is locked in the limiting groove. Sealing strips are also provided in the installation ports to prevent acid mist from leaking and polluting from the installation port and the channel.

[0038] Sealing grooves are provided on both sides of the width of the alkaline filter plate 5 on the inner wall of the square tube 31. Sealing strips are installed in the sealing grooves. The sealing strips improve the sealing performance between the alkaline filter plate 5 and the inner wall of the pretreatment air pipe 3, ensuring that the acid mist entering the interior of the vessel 1 from the air inlet pipe 11 has been pretreated by the alkaline filter plate 5, thereby improving the overall acid removal effect.

[0039] A support block 34 is also provided in the middle of the square tube 31. The top of the support block 34 is inclined to achieve stable support for the alkaline filter plate 5.

[0040] The spray pipe 4 is installed inside the vessel body 1 and above the pretreatment vent pipe 3. Its top is fixedly connected to the top cover 2 by a connecting rod. It is connected to an alkaline tank and a clean water tank outside the vessel body 1 through a conveying pipe 22. The alkaline solution is used to fully neutralize the acid mist after it has passed through the alkaline filter plate 5, thereby improving the quality of acid mist treatment. The clean water tank can also be used to clean the upper surface of the pretreatment vent pipe 3 and the vent holes. At this time, the electromagnetic drive valve needs to be opened in advance. The cleaning waste liquid generated inside the pretreatment vent pipe 3 is discharged into the vessel body 1 through the outlet pipe. All waste liquid inside the vessel body 1 is discharged through the drain pipe 12. The electromagnetic drive valve is closed during normal operation when removing acid mist.

[0041] The bottom of the spray pipe 4 is provided with multiple first nozzles and multiple second nozzles. The first nozzles are located in the middle of the bottom end of the spray pipe 4 and face the vent. The second nozzles are located on the periphery of the bottom end of the spray pipe 4 and face the periphery of the vent. The first nozzles are used to achieve neutralization spray treatment of acid mist guided by the vent, and the second nozzles are used to achieve neutralization spray treatment of acid mist scattered on the periphery above the vent, thereby improving the completeness and effectiveness of acid mist neutralization spray.

[0042] In this structure, an alkaline filter plate 5 is installed on the pretreatment vent pipe 3. The alkaline filter plate 5 is inclined to increase the contact area between the alkaline filter plate 5 and the acid mist, thereby improving the treatment speed and effect of acid mist pretreatment. Combined with the spray pipe 4 to spray the acid mist, the combination of pretreatment and spray treatment improves the acid mist treatment effect. Finally, a filter block 23 is installed at the lower part of the exhaust pipe 21 to achieve further adsorption and filtration before exhaust, avoiding the possibility of incomplete neutralization and the direct discharge of unneutralized acid mist, and ensuring that the emission meets the standards.

[0043] The working principle of this patent:

[0044] After the acid mist enters the pretreatment ventilation pipe 3 through the air inlet pipe 11 and the air inlet, it is neutralized and pre-neutralized by the inclined alkaline filter plate 5 and then enters the vessel body 1 through the vent hole. It then undergoes secondary acid removal treatment by the alkaline solution sprayed by the spray pipe 4, and finally is discharged through the exhaust pipe 21 after being filtered by the filter block 23.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A supercritical fluid extraction post-processing device, characterized in that: include A vessel body with an opening at the top, an air inlet pipe on its side near the bottom, and a liquid drain pipe at the bottom; A top cover is horizontally positioned on the top of the vessel body, and an exhaust pipe is also provided on it; A pretreatment vent pipe is horizontally installed inside the vessel body. An air inlet is provided on one side of the pretreatment vent pipe, and the air inlet is connected to the air inlet pipe. An alkaline filter plate is provided on the pretreatment vent pipe. The alkaline filter plate is inclined downward, with its higher side positioned above the air inlet and its lower side penetrating into the pretreatment vent pipe and positioned on the side of the pretreatment vent pipe away from the air inlet. Several vent holes are also provided at the top of the pretreatment vent pipe.

2. The supercritical fluid extraction post-processing apparatus according to claim 1, characterized in that: The pretreatment vent pipe includes a square pipe, and a first sealing plate and a second sealing plate are respectively sealed and fixed on both sides of its length, and the first sealing plate is set close to the air inlet pipe. The air inlet is located in the middle of the first sealing plate. Above the air inlet, the first sealing plate is also provided with an installation opening for the alkaline filter plate to pass through. A limiting groove is provided at the bottom corner of the inner side of the second sealing plate. The lower side of the alkaline filter plate extends into the square tube from the installation opening and is engaged in the limiting groove.

3. The supercritical fluid extraction post-processing apparatus according to claim 2, characterized in that: Both the first sealing plate and the second sealing plate are arc-shaped plates that fit against the inner wall of the vessel.

4. The supercritical fluid extraction post-processing apparatus according to claim 2, characterized in that: The inner wall of the square tube is provided with sealing grooves on both sides of the width of the alkaline filter plate, and sealing strips are installed in the sealing grooves. The vessel body is provided with a channel that can just accommodate the alkaline filter plate to be inserted at an angle, and the channel and the installation port are also provided with sealing strips.

5. The supercritical fluid extraction post-processing apparatus according to claim 4, characterized in that: The square tube also has a support block inside.

6. The supercritical fluid extraction post-processing apparatus according to claim 1, characterized in that: It also includes a spray pipe, which is disposed inside the reactor body and above the pretreatment vent pipe, and is connected to an alkali tank and a clean water tank through a conveying pipe. The bottom of the spray pipe is provided with a plurality of first nozzles and a plurality of second nozzles. The first nozzles are located at the middle of the bottom end of the spray pipe and are positioned toward the vent hole. The second nozzles are located on the periphery of the bottom end of the spray pipe and are positioned toward the periphery of the vent hole.

7. The supercritical fluid extraction post-processing apparatus according to claim 1, characterized in that: An exhaust channel is provided on the top cover, an exhaust pipe is installed in the upper part of the exhaust channel, and a filter block is installed in the lower part of the exhaust channel.

8. The supercritical fluid extraction post-processing apparatus according to claim 7, characterized in that: The filter block is T-shaped, including a wider upper section and a narrower lower section. The exhaust channel consists of an upper cylindrical mounting section, a middle cylindrical mounting section, and a lower cylindrical section that are coaxially connected. The diameter of the middle cylindrical mounting section is larger than that of the lower cylindrical section, and the diameter of the lower cylindrical section is larger than that of the upper cylindrical mounting section. The middle cylindrical mounting section and the lower cylindrical section together accommodate the filter block, while the upper cylindrical mounting section accommodates the exhaust pipe.

Images