Circulating treatment device for external cross-flow filtration

Abstract

The utility model discloses an external circulating treatment device for cross-flow filtration. The external circulating treatment device comprises a reaction kettle, an external filtering assembly and a stirring assembly, the external filtering assembly comprises a cross-flow filter, a circulating feeding pipe, a circulating discharging pipe, a filtrate collecting pipe and a circulating pump; the cross-flow filter is provided with a filtering channel and a filtrate collecting cavity, the two ends of the filtering channel are communicated with the reaction kettle treatment cavity through a circulating feeding pipe and a circulating discharging pipe respectively, a filtrate collecting pipe is communicated with the filtrate collecting cavity, and the circulating pump is arranged on the circulating discharging pipe. The stirring assembly comprises a motor, a stirring shaft, a stirring piece and a rotating joint; the motor is in driving connection with the stirring shaft; the rotary joint is mounted on the stirring shaft and is provided with an air inlet; an air outlet is formed in the outer wall of the stirring shaft, an air guide channel is formed in the stirring shaft and communicated with the air inlet and the air outlet, and the stirring piece is fixedly connected to the stirring shaft. The device can realize continuous treatment of stirring and filtering processes, improves product quality and treatment efficiency, and realizes recycling of solid materials.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field, especially relate to a circulating treatment device of external crossflow filtration. BACKGROUND

[0002] The common essential oil odor removal methods in industry include high-temperature rectification, low-concentration lye washing, adsorbent adsorption and the like. When low-concentration lye washing is used, the lye used is mostly sodium hydroxide aqueous solution with a concentration of 10-25%, which has a good effect on odor removal, but the recovery and treatment of the sodium hydroxide solution are difficult, and the solution cannot be recycled, the wastewater treatment amount is large, and the production cost is high. In addition, there are some uncertain factors in the lye washing process, and the lye washing time of different materials will have some differences. If the lye washing time is not accurately controlled, it is easy to cause abnormal color of essential oil, cause reaction of essential oil components to produce new chemical substances, and result in unqualified product quality.

[0003] Compared with low-concentration lye washing, the use of adsorbent adsorption to remove the odor of essential oil basically has no chemical reaction throughout, which can reduce the risk of pollution and reaction deterioration of essential oil to a certain extent, but still has some deficiencies. Taking γ-terpinene as an example, the common odor removal method is adsorbent adsorption. In operation, the essential oil and the adsorbent are usually first stirred and mixed in a reaction kettle for a long time, and then the adsorbent in the essential oil is filtered out by a butterfly centrifuge using multiple layers of filter cloth. The filtered adsorbent is not convenient to recycle, resulting in high production cost. Moreover, the separation equipment has low efficiency and large floor area. In addition, since γ-terpinene has the characteristics of easy oxidation, it is easily oxidized when stirred and mixed with the adsorbent in the reaction kettle for a long time, which affects the product quality. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a circulating treatment device of external crossflow filtration to integrate the stirring and filtering processes, realize continuous treatment of the stirring and filtering processes, and recycle solid materials.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A circulating treatment device of external cross-flow filtration, comprising a reaction kettle, an external filtration assembly and a stirring assembly; the reaction kettle has a treatment cavity, and a feed inlet and a discharge outlet communicating with the treatment cavity; the external filtration assembly comprises a cross-flow filter, a circulating feed pipe, a circulating discharge pipe, a filtrate collecting pipe and a circulating pump; the cross-flow filter comprises a filter core, and a filtration channel and a filtrate collecting cavity formed by the filter core; one end of the filtration channel communicates with the treatment cavity through the circulating feed pipe, and the other end communicates with the treatment cavity through the circulating discharge pipe; the circulating feed pipe is provided with a circulating feed control valve; the filtrate collecting pipe communicates with the filtrate collecting cavity, and the filtrate collecting pipe is provided with a liquid collecting control valve; and the circulating pump is arranged on the circulating discharge pipe.

[0007] The stirring assembly comprises a motor, a stirring shaft, a stirring piece and a rotary joint; the motor is arranged outside the reaction kettle and is drivingly connected with the stirring shaft; the rotary joint is mounted on the stirring shaft and is provided with an air inlet; the stirring shaft partially penetrates into the treatment cavity, and a plurality of air outlets are formed on the outer wall surface of the stirring shaft in the treatment cavity; a gas guide channel is arranged in the stirring shaft, and the gas guide channel communicates with the air inlet and the air outlets; and the stirring piece is arranged in the treatment cavity and is fixedly connected with the stirring shaft.

[0008] Further, the circulating feed pipe is connected to the top of the reaction kettle; the discharge outlet is located at the bottom of the reaction kettle, and the discharge outlet is circumscribed by a discharge pipe, and the discharge pipe is provided with a discharge control valve; the circulating discharge pipe is connected to the discharge pipe to communicate with the treatment cavity, and the position where the circulating discharge pipe connects with the discharge pipe is located between the discharge control valve and the reaction kettle, and the circulating discharge pipe is provided with a circulating discharge control valve.

[0009] Further, the circulating discharge control valve is arranged on the pipeline between the circulating pump and the reaction kettle and on the pipeline between the circulating pump and the cross-flow filter.

[0010] Further, the cross-flow filter comprises an upper cover, a lower cover, an outer cylinder and the filter core; the filter core and the outer cylinder are both vertically cylindrical with upper and lower openings, the outer cylinder is sleeved outside the filter core, the upper cover closes the upper opening of the filter core and the outer cylinder, the lower cover closes the lower opening of the filter core and the outer cylinder, the filter core forms the filtration channel, and the filter core and the outer cylinder form the filtrate collecting cavity; the circulating feed pipe is connected to the upper cover, and the circulating discharge pipe is connected to the lower cover.

[0011] Further, the external filter assembly further comprises a backflow pipe, one end of the backflow pipe being communicated with the treatment cavity, the other end of the backflow pipe being communicated with the filtrate collecting cavity, and a backflow control valve being arranged on the backflow pipe.

[0012] Further, one end of the backflow pipe is connected to the top of the reaction kettle, and the other end of the backflow pipe is connected to the filtrate collecting pipe, and the position where the backflow pipe is connected to the filtrate collecting pipe is located between the liquid collecting control valve and the cross-flow filter.

[0013] Further, the stirring shaft comprises a shaft body and a nozzle part, one end of the shaft body is connected to the motor, the other end of the shaft body is connected to the nozzle part, the nozzle part has a spraying surface on the outer side of the nozzle part, and the gas outlets are uniformly arranged on the spraying surface.

[0014] Further, the spraying surface is a hemispherical surface, and the spraying surface is located on the side of the nozzle part which is away from the motor.

[0015] Further, the rotary joint is annular and is rotatably arranged on the outer side of the stirring shaft, the intermediate gas guide hole which is communicated with the gas guide channel is formed in the outer wall of the stirring shaft, the rotary joint and the outer wall of the stirring shaft jointly form an annular gas guide cavity, and the gas guide cavity is in sealed communication between the gas inlet and the intermediate gas guide hole.

[0016] The utility model has the following beneficial effects:

[0017] 1. The device is provided with an external filter assembly, which can pump the material in the reaction kettle into the cross-flow filter for cross-flow filtration, separate the solid in the material, and send the solid back to the reaction kettle for continuous use, thereby achieving the purpose of recycling the solid material, reducing the loss and cost of the solid material.

[0018] 2. The device is provided with a stirring assembly, which is provided with a hollow stirring shaft, which can not only drive the stirring part to fully mix the material, but also cooperate with the rotary joint to guide the gas into the treatment cavity, thereby enhancing the stirring effect, preventing oxidation, replacing cleaning, sealing protection, and the like.

[0019] 3. The device integrates the stirring cycle and the cross-flow filtration process through the reaction kettle and the external filter assembly, can realize continuous and closed cycle production, shortens the time of contact between the material and the air, improves the quality of the product, the connection structure between the reaction kettle and the cross-flow filter is simple, the sealing performance is good, the device is safe and convenient to operate, can improve the production efficiency, and can reduce the operation risk of the staff.

[0020] 4. The device has low manufacturing cost, small occupation, is convenient for workshop equipment layout, and improves the utilization rate of the workshop site.

[0021] 5、The device is suitable for removing odor of gamma-terpinene by adsorption method, and the gamma-terpinene and the adsorbent can be fully stirred and mixed in the treatment cavity to remove the odor, nitrogen can be introduced through the stirring shaft and the rotary joint to prevent oxidation of the gamma-terpinene, and the gamma-terpinene and the adsorbent can be filtered and separated through the external filter assembly after the odor is removed, the separated adsorbent can be directly sent back to the reaction kettle for recycling, and the cost of odor removal is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the external filter assembly part of the utility model.

[0024] Figure 3 It is a filter core structural schematic diagram of the utility model.

[0025] Figure 4 It is a rotary joint structural schematic diagram of the utility model.

[0026] Figure 5 It is a structural schematic diagram of the connection between the rotary joint and the stirring shaft of the utility model.

[0027] Figure 6 It is a structural schematic diagram of the connection between the shaft body part and the nozzle part of the utility model.

[0028] Main component symbol explanation:

[0029] 100, reaction kettle; 110, treatment cavity; 120, feed inlet; 130, discharge outlet; 140, discharge pipe; 141, discharge control valve; 150, breather valve; 160, manhole;

[0030] 200, external filter assembly; 210, cross-flow filter; 211, filter core; 212, filter channel; 213, filtrate collection cavity; 214, upper cover; 215, lower cover; 216, outer cylinder; 220, circulating feed pipe; 221, circulating feed control valve; 230, circulating discharge pipe; 231, circulating discharge control valve; 240, filtrate collection pipe; 241, liquid collection control valve; 250, circulating pump; 260, backflow pipe; 261, backflow control valve;

[0031] 300, stirring assembly; 310, motor; 320, stirring shaft; 321, gas outlet; 322, gas guide channel; 323, shaft body part; 324, nozzle part; 324a, jet surface; 325, intermediate gas guide hole; 330, stirring piece; 340, rotary joint; 341, gas inlet; 350, gas guide cavity; 360, shaft coupling. DETAILED DESCRIPTION

[0032] The utility model is further explained below in combination with the drawings and specific embodiments.

[0033] As Figures 1-6 The utility model discloses a kind of external cross-flow filtration's circulating processing device, including reaction kettle 100, external filtration assembly 200 and stirring assembly 300.Wherein, reaction kettle 100 has processing cavity 110 and the feed inlet 120 and discharge outlet 130 being communicated with processing cavity 110, feed inlet 120 is arranged at the top of reaction kettle 100, discharge outlet 130 is arranged at the bottom of reaction kettle 100, discharge outlet 130 is externally connected with discharge pipe 140, discharge control valve 141 is arranged on discharge pipe 140, to control discharge.In addition, reaction kettle 100 is also provided with breather valve 150 and manhole 160, to protect equipment safety.

[0034] External filtration assembly 200 includes cross-flow filter 210, circulating feed pipe 220, circulating discharge pipe 230, filter liquid collection pipe 240 and circulating pump 250.Cross-flow filter 210 includes filter core 211, and cross-flow filter 210 is separated to form filter channel 212 and filter liquid collection cavity 213 by filter core 211 inside.The one end of this filter channel 212 is communicated with processing cavity 110 by circulating feed pipe 220, and the other end is communicated with processing cavity 110 by circulating discharge pipe 230.Circulating feed control valve 221 is arranged on circulating feed pipe 220, filter liquid collection pipe 240 is communicated with filter liquid collection cavity 213, and liquid collection control valve 241 is arranged on filter liquid collection pipe 240.

[0035] Circulating pump 250 is arranged on circulating discharge pipe 230, and material in processing cavity 110 can be pumped into filter channel 212 to carry out cross-flow filtration along circulating discharge pipe 230 by circulating pump 250, filtered filter liquid enters filter liquid collection cavity 213, and can be discharged from device by filter liquid collection pipe 240, while solid separated from material can return to processing cavity 110 along circulating feed pipe 220 to be used cyclically, to reduce its loss and use cost.On this basis, circulating feed pipe and filter liquid collection pipe 240 can be opened and closed by circulating liquid inlet control valve and liquid collection control valve 241, to control material backflow or filtration discharge.The connection structure between reaction kettle 100 and cross-flow filter 210 is simple, and sealing performance is good.

[0036] The stirring assembly 300 comprises a motor 310, a stirring shaft 320, a stirring member 330 and a rotary joint 340. The motor 310 is arranged outside the reaction kettle 100 and is drivingly connected with the stirring shaft 320 through a shaft coupling 360. The rotary joint 340 is mounted on the stirring shaft 320, and the rotary joint 340 is provided with an air inlet 341 which can be externally connected with an air inlet pipe. The stirring shaft 320 penetrates the reaction kettle 100 and is mostly inserted into the processing cavity 110. A plurality of air outlets 321 are formed in the outer wall surface of the stirring shaft 320 in the processing cavity 110. A gas guiding channel 322 is hollowly arranged in the stirring shaft 320, and the gas guiding channel 322 is arranged in the axial direction of the stirring shaft 320 and is respectively communicated with the air inlet 341 and the air outlet 321 at two ends. The stirring member 330 is arranged in the processing cavity 110 and is fixedly connected with the stirring shaft 320, and can play a stirring role.

[0037] The rotary joint 340 can always communicate the gas guiding channel 322 with the external air inlet pipe without affecting the rotation of the stirring shaft 320. In cooperation of the rotary joint 340 and the hollow stirring shaft 320, the gas can be introduced from the external air inlet pipe to the processing cavity 110 along the air inlet 341, the gas guiding channel 322 and the air inlet 341. The introduced gas is selected according to the use requirement, so as to achieve the effects of preventing oxidation, displacement cleaning, sealing protection and the like.

[0038] The device is safe and convenient to operate, and the operation risk of the staff is low. Based on the external filtering assembly 200 and the stirring assembly 300, the device can continuously perform the stirring and mixing and the cross-flow filtration two processes, realizes the continuous closed circulation production, can not only improve the production efficiency, but also can shorten the contact time of the material and the air, and is beneficial to improving the quality of the product.

[0039] Specifically, the above-mentioned circulating feed pipe 220 is connected to the top of the reaction kettle 100, the circulating discharge pipe 230 is connected to the discharge pipe 140 and is communicated with the processing cavity 110, and the circulating discharge pipe 230 and the discharge pipe 140 share the discharge port 130. The position where the circulating discharge pipe 230 is connected with the discharge pipe 140 is located between the discharge control valve 141 and the reaction kettle 100, and the circulating discharge control valve 231 is arranged on the circulating discharge pipe 230, so as to control the start and end of the cross-flow filtration process. In the embodiment, the circulating discharge control valve 231 is provided with two, one of which is arranged on the pipeline between the circulating pump 250 and the reaction kettle 100, and the other is arranged on the pipeline between the circulating pump 250 and the cross-flow filter 210.

[0040] The cross-flow filter 210 comprises an upper cover 214, a lower cover 215, an outer cylinder 216 and a filter core 211, the filter core 211 and the outer cylinder 216 are both vertically cylindrical with upper and lower openings, the outer cylinder 216 is sleeved outside the filter core 211, the upper cover 214 closes the upper opening of the filter core 211 and the outer cylinder 216, the lower cover 215 closes the lower opening of the filter core 211 and the outer cylinder 216, the inner side of the filter core 211 forms a filtering channel 212, and the filter core 211 and the outer cylinder 216 form a filtered liquid collecting cavity 213. A circulating feed pipe 220 is connected to the upper cover 214, and a circulating discharge pipe 230 is connected to the lower cover 215. During operation, the material to be filtered can enter the filtering channel 212 from bottom to top and be fully filtered.

[0041] In addition, the external filter assembly 200 is also provided with a backflow pipe 260, one end of the backflow pipe 260 is communicated with the treatment cavity 110, the other end is communicated with the filtered liquid collecting cavity 213, a backflow control valve 261 is arranged on the backflow pipe 260, the backflow pipe 260 can be opened and closed through the backflow control valve 261, when the sampling detection through the filtered liquid collecting pipe 240 and the quality inspection are unqualified, the filtered liquid can be guided to flow back to the treatment cavity 110 for continuous treatment. The backflow pipe 260 and the filtered liquid collecting pipe 240 share one interface, one end of the backflow pipe 260 is connected to the top of the reaction kettle 100, the other end is connected to the filtered liquid collecting pipe 240, and the position where the backflow pipe 260 and the filtered liquid collecting pipe 240 are connected is located between the liquid collecting control valve 241 and the cross-flow filter 210.

[0042] The above-mentioned stirring shaft 320 mainly comprises two parts of a shaft body part 323 and a nozzle part 324, wherein one end of the shaft body part 323 is connected with the motor 310, the other end is connected with the nozzle part 324, the nozzle part 324 has a spraying surface 324a on the outside, and the gas outlets 321 are uniformly arranged on the spraying surface 324a. The spraying surface 324a is preferably a hemispherical surface, and the spraying surface 324a is arranged on the side of the nozzle part 324 away from the motor 310, so as to uniformly spray the gas.

[0043] The rotating joint 340 connecting the gas guide channel 322 and the external gas inlet pipe is annular as a whole, and the rotating joint 340 is rotatably sleeved outside the stirring shaft 320. In addition to the gas inlet 341, a middle gas guide hole 325 is also formed in the outer wall of the stirring shaft 320 and communicated with the gas guide channel 322, and the middle gas guide hole 325 is located close to one end of the shaft body part 323 away from the nozzle part 324. Correspondingly, the rotating joint 340 and the outer wall of the stirring shaft 320 jointly form an annular gas guide cavity 350, the gas guide cavity 350 seals and communicates the gas inlet 341 and the middle gas guide hole 325, and the stirring function and the gas inlet function of the stirring shaft 320 are ensured.

[0044] The device is suitable for removing the odor of essential oil by adsorbent adsorption method, and the odor of γ-terpinene is taken as an example, when the device is used, γ-terpinene and adsorbent can be fully stirred and mixed in the treatment cavity 110, and the odor can be fully removed. While stirring, nitrogen can be introduced through the stirring shaft 320 and the rotary joint 340, and the nitrogen enters the treatment cavity 110 through the above-mentioned gas inlet 341, the gas guiding cavity 350, the intermediate gas guiding hole 325, the gas guiding channel 322 and the gas outlet 321 in turn, which not only can enhance the stirring effect, but also can play a protective role, reduce the risk of γ-terpinene being oxidized and deteriorated, and ensure the product quality.

[0045] After sufficient stirring for a period of time, cross-flow filtration can be carried out through the external filter assembly 200, and the filter element 211 is used to effectively separate γ-terpinene and adsorbent, on the one hand, the adsorbent is sent back to the treatment cavity 110 for recycling, thereby reducing the use cost of the adsorbent, and on the other hand, γ-terpinene can be guided out through the filtrate collecting pipe 240 for corresponding quality inspection, collection and other treatments. After long-term use, nitrogen can be introduced into the filtrate collecting pipe 240 to blow back, and the cross-flow filter 210 can be cleaned to ensure the filtering effect.

[0046] Although the present application is specifically shown and introduced in combination with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present application in form and details without departing from the spirit and scope of the present application defined in the appended claims, and all such changes are within the protection scope of the present application.

Claims

1. A recirculating treatment device of the external cross-flow filtration type, characterized in that, The application relates to a circulating treatment device with external cross-flow filtration, which comprises the following parts: a reaction kettle with a treatment cavity and a feeding port and a discharging port communicating with the treatment cavity; an external filtration assembly, which comprises a cross-flow filter, a circulating feeding pipe, a circulating discharging pipe, a filtrate collecting pipe and a circulating pump; the cross-flow filter comprises a filter core and a filtering channel and a filtrate collecting cavity formed by the filter core; one end of the filtering channel is connected with the treatment cavity through the circulating feeding pipe, and the other end of the filtering channel is connected with the treatment cavity through the circulating discharging pipe; a circulating feeding control valve is arranged on the circulating feeding pipe; the filtrate collecting pipe is connected with the filtrate collecting cavity, and a filtrate collecting control valve is arranged on the filtrate collecting pipe; the circulating pump is arranged on the circulating discharging pipe; a stirring assembly, which comprises a motor, a stirring shaft, a stirring piece and a rotary joint; the motor is arranged outside the reaction kettle and is drivingly connected with the stirring shaft; the rotary joint is mounted on the stirring shaft and is provided with an air inlet; the stirring shaft partially penetrates into the treatment cavity, and a plurality of air outlets are formed in the outer wall surface of the stirring shaft in the treatment cavity; a gas guide channel is arranged in the stirring shaft and communicates with the air inlet and the air outlets; and the stirring piece is arranged in the treatment cavity and is fixedly connected with the stirring shaft.

2. The circulating treatment device with external cross-flow filtration according to claim 1, characterized in that: the circulating feeding pipe is connected to the top of the reaction kettle; the discharging port is located at the bottom of the reaction kettle, and an outlet pipe is arranged outside the discharging port and is provided with a discharging control valve; the circulating discharging pipe is connected to the outlet pipe and thus communicates with the treatment cavity; the position where the circulating discharging pipe is connected with the outlet pipe is located between the discharging control valve and the reaction kettle; and the circulating discharging pipe is provided with a circulating discharging control valve.

3. The circulating treatment device with external cross-flow filtration according to claim 2, characterized in that: the circulating discharging control valve is arranged on the pipeline between the circulating pump and the reaction kettle and on the pipeline between the circulating pump and the cross-flow filter.

4. The circulating treatment device with external cross-flow filtration according to claim 1, characterized in that: the cross-flow filter comprises an upper cover, a lower cover, an outer cylinder and the filter core; the filter core and the outer cylinder are vertically cylindrical and are open at the top and bottom; the outer cylinder is arranged outside the filter core; the upper cover closes the upper opening of the filter core and the outer cylinder; the lower cover closes the lower opening of the filter core and the outer cylinder; the filter core forms the filtering channel; and the filter core and the outer cylinder form the filtrate collecting cavity; the circulating feeding pipe is connected to the upper cover, and the circulating discharging pipe is connected to the lower cover.

5. The circulating treatment device with external cross-flow filtration according to claim 1, characterized in that: the external filtration assembly further comprises a backflow pipe, one end of which communicates with the treatment cavity, and the other end of which communicates with the filtrate collecting cavity; and a backflow control valve is arranged on the backflow pipe.

6. The external cross-flow filtration circulating treatment device according to claim 5, characterized in that: one end of the reflux pipe is connected to the top of the reactor, and the other end is connected to the filtrate collecting pipe, and the position where the reflux pipe connects to the filtrate collecting pipe is between the liquid collecting control valve and the cross-flow filter.

7. The external cross-flow filtration circulating treatment device according to claim 1, characterized in that: the stirring shaft comprises a shaft body and a nozzle, one end of the shaft body is connected to the motor, the other end is connected to the nozzle, the nozzle has a spraying surface on the outside, and the gas outlets are uniformly arranged on the spraying surface.

8. The external cross-flow filtration circulating treatment device according to claim 7, characterized in that: the spraying surface is a hemispherical surface, and the spraying surface is located on the side of the nozzle away from the motor.

9. The external cross-flow filtration circulating treatment device according to claim 1, characterized in that: the rotary joint is annular in shape and is rotatably arranged on the outside of the stirring shaft, the intermediate gas guide hole that communicates with the gas guide channel is formed in the outer wall of the stirring shaft, an annular gas guide cavity is formed between the rotary joint and the outer wall of the stirring shaft, and the gas guide cavity seals and communicates the gas inlet and the intermediate gas guide hole.

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