Tail gas purification and recovery equipment in bulk drug production

Abstract

The utility model relates to the technical field of tail gas treatment in the production of medicinal raw materials, and discloses tail gas purification and recovery equipment in the production of medicinal raw materials, which comprises a pretreatment barrel, a purification barrel and a recovery box body, wherein a Z-shaped guide pipe is fixedly connected inside one side of the upper end of the pretreatment barrel; and the other end of the Z-shaped guide pipe is fixedly connected with the interior of one side of the lower end of a purification barrel, the interior of one side of the upper end of the purification barrel is fixedly connected with the Z-shaped guide pipe, and the other end of the Z-shaped guide pipe is fixedly connected with the interior of one side of a recycling box. According to the tail gas purification and recovery equipment in the production of the bulk pharmaceutical chemicals, multi-layer and multi-step purification and recovery treatment can be effectively carried out on tail gas, solid particles, large liquid drops and harmful ingredients in the tail gas can be respectively removed, and meanwhile, the recycling of condensable ingredients such as organic solvents in the tail gas is realized; not only is the purification effect of the tail gas improved, but also resource recovery is realized, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tail gas treatment technology in pharmaceutical raw material production, specifically a tail gas purification and recovery device in pharmaceutical raw material production. Background Technology

[0002] Pharmaceutical raw material production refers to the entire process of preparing pharmaceutical raw materials through various technological means such as chemical synthesis, biological fermentation, and natural extraction. It is one of the core links in the pharmaceutical production chain.

[0003] The production process of pharmaceutical raw materials generates a large amount of exhaust gas containing organic solvents, acid and alkali gases and other harmful components. If these exhaust gases are directly emitted into the atmosphere, they will not only cause serious pollution to the environment, but may also endanger human health.

[0004] Currently, most existing exhaust gas treatment equipment has only one function. It can only perform simple purification of exhaust gas and cannot recover and utilize the useful components in the exhaust gas, resulting in resource waste. Or, although it has a certain recovery function, the purification effect is not good and cannot meet the increasingly stringent environmental emission standards.

[0005] Therefore, it is necessary to propose a tail gas purification and recovery device for the production of pharmaceutical raw materials. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a tail gas purification and recovery device for pharmaceutical raw material production. It has the advantages of effectively purifying tail gas and condensing and recovering organic solvents in the tail gas, thus solving the problems mentioned in the background technology.

[0007] This utility model provides the following technical solution: a device for purifying and recovering exhaust gas in the production of pharmaceutical raw materials, comprising a pretreatment cylinder, a purification cylinder, and a recovery box:

[0008] A Z-shaped conduit is fixedly connected to the inside of one side of the upper end of the pretreatment cylinder, and the other end of the Z-shaped conduit is fixedly connected to the inside of one side of the lower end of the purification cylinder. A Z-shaped conduit is fixedly connected to the inside of one side of the upper end of the purification cylinder, and the other end of the Z-shaped conduit is fixedly connected to the inside of one side of the recycling box.

[0009] A partition is installed in the middle of the interior of the recycling box, dividing the interior of the recycling box into chamber one and chamber two. Guide plates are fixedly connected to both sides of the interior of chamber two. A spray assembly three is installed in the middle of the interior of chamber two. Two sets of staggered circulating condenser pipes are installed inside chamber one. A drying support block is movably inserted into the upper surface of the partition. A slot is opened at the overlap of the partition and the drying support block.

[0010] Preferably, a slot is provided on one side of the pretreatment cylinder, a filter plate is inserted into the slot, a spray assembly is installed at the top inside the pretreatment cylinder, an air inlet pipe is installed at the lower end of one side of the pretreatment cylinder, a drain pipe is installed at the lower end of the pretreatment cylinder, and the input end of the spray assembly is connected to the pretreatment liquid storage tank through a pump.

[0011] Preferably, a slot two is provided on one side of the purification cylinder, a packing plate is inserted into the slot two, a spray assembly two is installed in the middle of the purification cylinder, a demister is installed at the top inside the purification cylinder, a drain pipe two is installed at the lower inside the purification cylinder, and the input end of the spray assembly two is connected to the purification liquid storage tank through a pump body.

[0012] Preferably, the upper surfaces of chamber two and chamber one are fitted with a cover by bolts, the input end of the spray assembly three is fixedly connected to the cover, and the input end of the spray assembly three is connected to the absorbent liquid storage tank through a pump body.

[0013] Preferably, a drain pipe three is installed on one side of the recycling box, and the drain pipe three communicates with the interior of the second chamber. A recycling discharge pipe is installed on the side of the recycling box, and the recycling discharge pipe communicates with the interior of the first chamber. An exhaust pipe is installed at the upper end of the other side of the recycling box, and the exhaust pipe communicates with the interior of the first chamber.

[0014] Preferably, the input and output ends of the two sets of circulating condenser tubes are connected to the coolant storage tank via pump bodies.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This equipment for purifying and recovering exhaust gas in the production of pharmaceutical raw materials involves pre-treating the exhaust gas by introducing it into a pre-treatment cylinder. Filter plates in the pre-treatment cylinder filter impurities and particulate matter from the exhaust gas. Simultaneously, a pre-treatment liquid comes into full contact with the exhaust gas, reacting chemically with some reactive harmful components to remove some harmful gases, achieving preliminary purification. The pre-purified exhaust gas then enters the purification cylinder, passing through ceramic or metal packing materials in the packing plates, along with the purification liquid. The mist-like purification liquid comes into full contact and mixes with the rising exhaust gas. Harmful components in the exhaust gas, as they rise, come into contact with the demister, where physical interception removes the water mist. The exhaust gas then enters chamber two of the recovery tank, where an absorbent liquid comes into contact with the exhaust gas via spraying, removing residual harmful components, such as organic gases. Acidic or alkaline gases are further absorbed by the absorbent liquid, achieving deep purification of the exhaust gas. The purified exhaust gas is dried by the partition and drying support block to reduce the moisture content, and then enters the interior of chamber one. Coolant is introduced through two sets of staggered circulating condenser pipes, which come into contact with condensable components such as organic solvents in the exhaust gas, changing them from a gaseous state to a liquid state. The liquid organic solvents fall into chamber one under the action of gravity and are recovered through the recovery and discharge pipe. The remaining exhaust gas can be discharged through the exhaust pipe. This structure can effectively perform multi-level and multi-step purification and recovery of exhaust gas, removing solid particles, large droplets and harmful components from the exhaust gas, while realizing the recovery and utilization of condensable components such as organic solvents in the exhaust gas. This not only improves the purification effect of the exhaust gas, but also realizes resource recovery and reduces production costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the pretreatment cylinder and the purification cylinder of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the recycling bin of this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Pretreatment cylinder; 110. Slot 1; 120. Filter plate; 130. Spray assembly 1; 140. Air inlet pipe; 150. Drain pipe 1;

[0023] 2. Purification cylinder; 210. Drain pipe II; 220. Slot II; 230. Packing plate; 240. Spray assembly II; 250. Demister;

[0024] 3. Recycling box; 310. Baffle plate; 320. Spray assembly three; 330. Middle partition; 340. Drying support block; 350. Circulating condenser pipe; 360. Exhaust pipe; 370. Recycling discharge pipe; 380. Drain pipe three; 390. Chamber one; 391. Chamber two;

[0025] 4. Z-shaped catheter;

[0026] 5. Top cover. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Please see Figure 1 , Figure 2 and Figure 3 A device for purifying and recovering exhaust gas in the production of pharmaceutical raw materials includes a pretreatment cylinder 1, a purification cylinder 2, and a recovery box 3.

[0030] A Z-shaped conduit 4 is fixedly connected to the inside of one side of the upper end of the pretreatment cylinder 1. The other end of the Z-shaped conduit 4 is fixedly connected to the inside of one side of the lower end of the purification cylinder 2. A Z-shaped conduit 4 is fixedly connected to the inside of one side of the upper end of the purification cylinder 2. The other end of the Z-shaped conduit 4 is fixedly connected to the inside of one side of the recycling box 3.

[0031] A partition 330 is installed in the middle of the interior of the recycling tank 3, dividing the interior of the recycling tank 3 into chamber 1 390 and chamber 2 391. Both sides of the interior of chamber 2 391 are fixedly connected to guide plates 310. A spray assembly 320 is installed in the middle of the interior of chamber 2 391. Two sets of staggered circulating condenser pipes 350 are installed inside chamber 1 390. A drying support block 340 is movably inserted into the upper surface of the partition 330. A slot is opened at the overlap of the partition 330 and the drying support block 340. The upper surfaces of chamber 2 391 and chamber 1 390 are bolted to the upper cover 5. The input end of the spray assembly 320 is fixedly connected to the upper cover 5. The input end of the spray assembly 320 is connected to the absorbent storage tank through a pump body.

[0032] After being treated by the pretreatment cylinder 1 and the purification cylinder 2, the exhaust gas enters the interior of the recovery box 3 through the Z-shaped duct 4. It first enters the interior of the second chamber 391 in the recovery box 3. The absorbent liquid comes into contact with the exhaust gas by spraying. The harmful components remaining in the exhaust gas, such as organic gases, acidic or alkaline gases, are further absorbed by the absorbent liquid to achieve deep purification of the exhaust gas. The purified exhaust gas is dried by the partition plate 330 and the drying support block 340 to reduce the moisture content in the exhaust gas. It then enters the interior of the first chamber 390. Coolant is introduced through two sets of staggered circulating condenser pipes 350, which come into contact with condensable components such as organic solvents in the exhaust gas, changing them from a gaseous state to a liquid state. The liquid organic solvents fall into the first chamber 390 under the action of gravity along the condenser pipes.

[0033] The drying support block 340 is equipped with a desiccant, and the drying support block 340 is detachably connected to the partition plate 330, so as to facilitate the replacement of the drying support block 340 and ensure the drying effect on the moisture in the exhaust gas.

[0034] The deflector plate 310 is used to gather the exhaust gas within the spray range of the spray assembly 320, ensuring that the absorbent liquid can fully contact the exhaust gas.

[0035] As a preferred technical solution of this utility model, a slot 110 is provided on one side of the pretreatment cylinder 1, a filter plate 120 is inserted into the slot 110, a spray assembly 130 is installed at the top inside the pretreatment cylinder 1, an air inlet pipe 140 is installed at the lower end of one side of the pretreatment cylinder 1, a drain pipe 150 is installed at the lower end of the pretreatment cylinder 1, and the input end of the spray assembly 130 is connected to the pretreatment liquid storage tank through a pump body.

[0036] The exhaust gas enters the pretreatment cylinder 1 through the intake pipe 140 for pretreatment. The filter plate 120 installed in the pretreatment cylinder 1 filters the impurities and solid particles contained in the exhaust gas. At the same time, the pretreatment liquid comes into full contact with the exhaust gas and reacts chemically with some of the reactive harmful components in the exhaust gas, removing some harmful gases and achieving preliminary purification of the exhaust gas. The resulting liquid is discharged through the drain pipe 150 installed at the bottom of the pretreatment cylinder 1.

[0037] As a preferred technical solution of this utility model, a slot 220 is provided on one side of the purification cylinder 2, a packing plate 230 is inserted into the slot 220, a spray assembly 240 is installed in the middle of the purification cylinder 2, a demister 250 is installed at the top inside the purification cylinder 2, a drain pipe 210 is installed at the lower inside the purification cylinder 2, and the input end of the spray assembly 240 is connected to the purification liquid storage tank through a pump body.

[0038] The preliminarily purified exhaust gas then enters the interior of the purification cylinder 2 through the Z-shaped duct 4. It passes through the ceramic or metal filler material set in the filler plate 230 and is used in conjunction with the purification liquid. The mist-like purification liquid comes into full contact with and mixes with the rising exhaust gas. The harmful components in the exhaust gas come into contact with the demister 250 as the exhaust gas rises, and the water mist in the exhaust gas is removed through physical interception.

[0039] The demister 250 uses a wire mesh demister. Its principle is as follows: Multiple layers of tightly arranged wire mesh are woven from metal wires such as stainless steel or plastic wires. When exhaust gas passes through the mesh, water mist particles collide with the mesh surface. Due to the capillary action of the mesh, the water mist particles are adsorbed onto the mesh. As the adsorbed water mist increases, small droplets gradually coalesce into larger droplets. When the weight of the droplets exceeds the adsorption force of the mesh, they drip off the mesh, thus achieving the purpose of intercepting water mist. The liquid generated inside the purification cylinder 2 is discharged through the drain pipe 210.

[0040] As a preferred technical solution of this utility model, a drain pipe 380 is installed on one side of the recycling box 3, and the drain pipe 380 communicates with the interior of the second chamber 391. A recycling discharge pipe 370 is installed on the side of the recycling box 3, and the recycling discharge pipe 370 communicates with the interior of the first chamber 390. An exhaust pipe 360 ​​is installed at the upper end of the other side of the recycling box 3, and the exhaust pipe 360 ​​communicates with the interior of the first chamber 390.

[0041] The drain pipe 380 is used to drain the liquid inside the chamber 2 391, the recovery drain pipe 370 is used to drain the condensed organic components, and the exhaust pipe 360 ​​is used to discharge the purified and recovered exhaust gas.

[0042] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for purifying and recovering exhaust gas in the production of pharmaceutical raw materials, comprising a pretreatment cylinder (1), a purification cylinder (2), and a recovery box (3), characterized in that: A Z-shaped conduit (4) is fixedly connected to the inside of one side of the upper end of the pretreatment cylinder (1). The other end of the Z-shaped conduit (4) is fixedly connected to the inside of one side of the lower end of the purification cylinder (2). A Z-shaped conduit (4) is fixedly connected to the inside of one side of the upper end of the purification cylinder (2). The other end of the Z-shaped conduit (4) is fixedly connected to the inside of one side of the recycling box (3). A partition plate (330) is installed in the middle of the interior of the recycling box (3). The interior of the recycling box (3) is divided into a first chamber (390) and a second chamber (391) by the partition plate (330). A guide plate (310) is fixedly connected to both sides of the interior of the second chamber (391). A spray assembly (320) is set in the middle of the interior of the second chamber (391). Two sets of staggered circulating condenser pipes (350) are installed inside the first chamber (390). A drying support block (340) is movably inserted into the upper surface of the partition plate (330). A slot is opened at the overlap of the partition plate (330) and the drying support block (340).

2. The exhaust gas purification and recovery equipment in the production of pharmaceutical raw materials according to claim 1, characterized in that: A slot (110) is provided on one side of the pretreatment cylinder (1), a filter plate (120) is inserted into the slot (110), a spray assembly (130) is installed on the top inside the pretreatment cylinder (1), an air inlet pipe (140) is installed at the lower end of one side of the pretreatment cylinder (1), a drain pipe (150) is installed at the lower end of the pretreatment cylinder (1), and the input end of the spray assembly (130) is connected to the pretreatment liquid storage tank through a pump body.

3. The exhaust gas purification and recovery equipment in the production of pharmaceutical raw materials according to claim 1, characterized in that: The purification cylinder (2) has a slot two (220) on one side, and a packing plate (230) is inserted into the slot two (220). A spray assembly two (240) is installed in the middle of the purification cylinder (2). A demister (250) is installed at the top inside the purification cylinder (2). A drain pipe two (210) is installed at the lower inside of the purification cylinder (2). The input end of the spray assembly two (240) is connected to the purification liquid storage tank through a pump body.

4. The exhaust gas purification and recovery equipment in the production of pharmaceutical raw materials according to claim 1, characterized in that: The upper surfaces of the second chamber (391) and the first chamber (390) are bolted with a cover (5). The input end of the third spray assembly (320) is fixedly connected to the cover (5). The input end of the third spray assembly (320) is connected to the absorbent liquid storage tank through the pump body.

5. The exhaust gas purification and recovery equipment in the production of pharmaceutical raw materials according to claim 1, characterized in that: A drain pipe (380) is installed on one side of the recycling box (3), and the drain pipe (380) communicates with the interior of the second chamber (391). A recycling discharge pipe (370) is installed on the side of the recycling box (3), and the recycling discharge pipe (370) communicates with the interior of the first chamber (390). An exhaust pipe (360) is installed at the upper end of the other side of the recycling box (3), and the exhaust pipe (360) communicates with the interior of the first chamber (390).

6. The exhaust gas purification and recovery equipment in the production of pharmaceutical raw materials according to claim 1, characterized in that: The input and output ends of the two sets of circulating condenser tubes (350) are respectively connected to the coolant storage tank through the pump body.

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