Waste gas emission device for medicament preparation

Abstract

The utility model provides a waste gas emission device for medicament preparation. The waste gas emission device comprises a spray tower, a gas outlet pipe, a filtering tank, a cooling chamber, a gas exhaust pipe, a filtering chamber, activated carbon, an isolation plate, a first through hole, a temperature guide plate frame, a temperature guide plate, a refrigeration sheet and a gas inlet pipe, the temperature guide plate frame, the temperature guide plate and the refrigeration sheet are arranged on the waste gas treatment device, the sprayed waste gas flowing into the filtering tank firstly flows through the temperature guide plate frame with lower temperature, and heat transfer occurs in the flowing process, so that water vapor in the waste gas is condensed into water while the temperature of the waste gas is reduced, and the humidity in the waste gas is further reduced; therefore, the humidity and the temperature of the waste gas entering the activated carbon are reduced to a great extent, so that the service life of the activated carbon is prolonged while the adsorption quality of the activated carbon is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas emission device for preparing a medicament. Background Art

[0002] Waste gas is generated during the production process of pharmaceutical preparation. The waste gas generated by the synthesis of raw materials is similar to the waste gas of chemical processes. The waste gas generated by the pharmaceutical preparation process is large. The waste gas is volatile and toxic. It often contains acetone, acetonitrile, ethyl acetate, ethyl chloride, isopropyl alcohol, ethanol, xylene and benzene, as well as small molecule olefins, borane, ethylene oxide, methyl chloride, ethyl chloride, arsine, methanol, phosphine, borohydride and methylamine. At present, the commonly used treatment methods for this waste gas include adsorption, absorption, condensation, catalytic combustion, regenerative thermal oxidation, etc. Among them, the most commonly used absorption method is the absorption method using a spray tower, which uses the principle of similar solubility between the absorption liquid and the organic waste gas, that is, the different solubility of the mixed components in the waste gas in the selected absorbent, to separate the harmful substances from the waste gas, thereby achieving the purpose of purifying the waste gas; secondly, in order to improve the purification quality, the waste gas after spray absorption is generally passed into activated carbon to adsorb the unabsorbed residual toxic gas; but because the waste gas after spray absorption is relatively humid and the temperature is high, the adsorption capacity of the activated carbon will be greatly reduced. Utility Model Content

[0003] The purpose of the present invention is to design a waste gas emission device for pharmaceutical preparation to solve the problems raised by the background technology. To achieve the above purpose, the present invention provides the following technical solutions: comprising a filter tank connected to the air outlet pipe of a spray tower, the filter tank being provided with a cooling chamber and a filter chamber connected to an exhaust pipe, the filter chamber being filled with activated carbon, an isolation plate being provided at the lower portion of the cooling chamber, a first through hole for connecting to the filter chamber being provided at the upper portion of the isolation plate, a heat conducting plate frame being provided in the cooling chamber above the first through hole, a heat conducting plate penetrating the filter tank being provided on the heat conducting plate frame, a cooling surface of a refrigeration plate being in close contact with the heat conducting plate, a plurality of air inlet pipes being connected to the cooling chamber above the heat conducting plate frame, and the air inlet pipes being connected to the air outlet pipe.

[0004] Furthermore, the heat conducting plate frame includes a first annular guide plate fixed to the heat conducting plate and tilted downward, and a second annular guide plate connected to the first annular guide plate via a plurality of connecting plates and tilted downward.

[0005] Furthermore, the first annular guide plate and the second annular guide plate have opposite inclination directions, and the first annular guide plate and the second annular guide plate are alternately distributed, and the first annular guide plate and the second annular guide plate form a bent air passage.

[0006] Furthermore, an inclined water retaining ring plate is provided above the first through hole, and a drain pipe is connected to the bottom of the cooling chamber.

[0007] Furthermore, an isolation ring plate is fixed to the bottom of the filter tank, and gaps are provided between the isolation ring plate and the cooling chamber, and between the isolation ring plate and the top plate of the filter tank, and soda lime is filled between the isolation ring plate and the outer wall of the filter chamber, and a second through hole is provided at the lower part of the filter chamber.

[0008] Furthermore, a first sealing plate for discharging the soda lime is detachably mounted on the bottom of the filter tank.

[0009] Furthermore, a second sealing plate for discharging the activated carbon is detachably mounted on the first sealing plate.

[0010] Furthermore, the detachable installation method can be in the form of connecting bolts with threaded holes.

[0011] Furthermore, the top of the filter tank is provided with an opening and closing door for filling the soda lime and the activated carbon.

[0012] Furthermore, there are four air inlet pipes, which are circumferentially distributed on the filter tank.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is provided with a temperature conducting plate frame, a temperature conducting plate and a refrigeration plate, and the waste gas after spraying that flows into the filter tank first flows through the temperature conducting plate frame with a lower temperature, and heat transfer occurs during the flow, thereby reducing the waste gas temperature while condensing the water vapor in the waste gas into water, thereby reducing the humidity in the waste gas; therefore, the present invention greatly reduces the humidity and temperature of the waste gas entering the activated carbon, thereby ensuring the adsorption quality of the activated carbon while increasing the service life of the activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative work.

[0015] Figure 1 is a cross-sectional schematic diagram of a filter tank;

[0016] Figure 2 Schematic diagram of the overall structure of the temperature conducting plate rack.

[0017] Among them: 1. exhaust pipe; 2. air inlet pipe; 3. refrigeration plate; 4. cooling chamber; 5. thermal conduction plate; 6. isolation ring plate; 7. first through hole; 8. water retaining ring plate; 9. drain pipe; 10. first sealing plate; 11. second sealing plate; 12. second through hole; 13. filter chamber; 14. second annular guide plate; 15. connecting plate; 16. first annular guide plate; 17. spray tower; 18. air outlet pipe; 19. thermal conduction plate frame; 19. filter tank. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation methods, mechanisms, features and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0019] Example: Please refer to Figure 1-2 , a waste gas emission device for preparation of pharmaceuticals, including a filter tank connected to an outlet pipe 18 of a spray tower 17, a cooling chamber 4 and a filter chamber 13 connected to an exhaust pipe 1 are provided on the filter tank, the filter chamber 13 is filled with activated carbon, an isolation plate is provided at the lower part of the cooling chamber 4, a first through hole 7 for connecting to the filter chamber 13 is provided at the upper part of the isolation plate, a temperature conducting plate frame 19 is provided in the cooling chamber 4 above the first through hole 7, a temperature conducting plate frame 19 is provided on the temperature conducting plate frame 19, a temperature conducting plate 5 passing through the filter tank is provided, a cooling surface of a refrigeration plate 3 is closely attached to the temperature conducting plate 5, and a plurality of air inlet pipes 2 are connected to the cooling chamber 4 above the temperature conducting plate frame 19. The air inlet pipe 2 is connected to the air outlet pipe 18, wherein the heat conducting plate frame 19 and the heat conducting plate 5 are both made of materials with a high thermal conductivity coefficient, such as metal materials; therefore, when the exhaust gas after spray adsorption with high temperature and humidity enters the filter tank, since the exhaust gas first flows through the heat conducting plate frame 19, and the temperature of the heat conducting plate frame 19 is relatively low, heat transfer will occur when the exhaust gas flows through the heat conducting plate frame 19, thereby reducing the exhaust gas temperature while condensing the water vapor in the exhaust gas into water, thereby reducing the humidity in the exhaust gas, and greatly reducing the humidity and temperature of the exhaust gas entering the activated carbon, thereby ensuring the adsorption quality of the activated carbon while increasing the service life of the activated carbon.

[0020] In this embodiment, the heat conduction plate frame 19 includes a first annular guide plate 16 fixed to the heat conduction plate 5 and inclined downward, and a second annular guide plate 14 connected to the first annular guide plate 16 through a plurality of connecting plates 15 and inclined downward. The inclination directions of the first annular guide plate 16 and the second annular guide plate 14 are opposite, and the first annular guide plate 16 and the second annular guide plate 14 are alternately distributed, and the first annular guide plate 16 and the second annular guide plate 14 form a bent air duct, so the exhaust gas exchanges heat with the heat conduction plate frame 19 in the process of flowing through the bent air duct, thereby reducing the temperature and humidity of the exhaust gas; and an inclined water retaining ring plate 8 is provided above the first through hole 7, and the bottom of the cooling chamber 4 is connected to the drain pipe 9, and the bottom of the filter tank is fixed with an isolation ring plate 6, and the isolation ring plate 6 and the cooling chamber 4 are isolated. There is a gap between the ring plate 6 and the top plate of the filter tank, and soda lime is filled between the isolation ring plate 6 and the outer wall of the filter chamber 13. A second through hole 12 is provided at the lower part of the filter chamber 13, which is beneficial to prevent the liquefied water from flowing into the soda lime or activated carbon, thereby improving the service life of the soda lime and activated carbon; and a first sealing plate 10 for discharging soda lime is detachably installed at the bottom of the filter tank, and a second sealing plate 11 for discharging activated carbon is detachably installed on the first sealing plate 10. The detachable installation method can be in the form of bolts and threaded holes. An opening and closing door for filling soda lime and activated carbon is provided on the top of the filter tank, thereby facilitating the replacement of soda lime and activated carbon; four air inlet pipes 2 are provided, and are circumferentially distributed on the filter tank, so that the exhaust gas flows evenly into the cooling chamber 4.

[0021] Working principle: When the waste gas after spray adsorption with high temperature and humidity enters the filter tank, it first flows through the bent air duct and exchanges heat with the temperature conducting plate frame 19 during the flow, thereby reducing the temperature and humidity of the waste gas. The waste gas then flows through the soda lime for further drying, and then is discharged from the filter tank through the exhaust pipe 1 after being adsorbed by the activated carbon. Therefore, the utility model greatly reduces the humidity and temperature of the waste gas entering the activated carbon, thereby ensuring the adsorption quality of the activated carbon while increasing the service life of the activated carbon.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "upper," "lower," "left," "right," "front," "rear," and similar expressions used herein are for illustrative purposes only.

[0023] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A waste gas discharge device for preparing a pharmaceutical agent, comprising a filter tank connected to an outlet pipe (18) of a spray tower (17), characterized in that: The filter tank is provided with a cooling chamber (4) and a filter chamber (13) connected to an exhaust pipe (1), the filter chamber (13) is filled with activated carbon, an isolation plate is provided at the lower part of the cooling chamber (4), a first through hole (7) for connecting to the filter chamber (13) is provided at the upper part of the isolation plate, a temperature guide plate frame (19) is provided in the cooling chamber (4) above the first through hole (7), a temperature guide plate (5) passing through the filter tank is provided on the temperature guide plate frame (19), a cooling surface of a refrigeration plate (3) is closely attached to the temperature guide plate (5), a plurality of air inlet pipes (2) are connected to the cooling chamber (4) above the temperature guide plate frame (19), and the air inlet pipes (2) are connected to the air outlet pipe (18).

2. The waste gas discharge device for pharmaceutical preparation according to claim 1, characterized in that: The heat conducting plate frame (19) comprises a first annular guide plate (16) fixedly connected to the heat conducting plate (5) and tilted downward, and a second annular guide plate (14) connected to the first annular guide plate (16) via a plurality of connecting plates (15) and tilted downward.

3. The waste gas discharge device for pharmaceutical preparation according to claim 2, characterized in that: The first annular guide plate (16) and the second annular guide plate (14) are inclined in opposite directions, and the first annular guide plate (16) and the second annular guide plate (14) are alternately distributed, and the first annular guide plate (16) and the second annular guide plate (14) form a bent airway.

4. The waste gas discharge device for pharmaceutical preparation according to claim 1, characterized in that: An inclined water retaining ring plate (8) is provided above the first through hole (7), and a drain pipe (9) is connected to the bottom of the cooling chamber (4).

5. The waste gas discharge device for pharmaceutical preparation according to claim 1, characterized in that: An isolation ring plate (6) is fixed to the bottom of the filter tank, and gaps are provided between the isolation ring plate (6) and the cooling chamber (4), and between the isolation ring plate (6) and the top plate of the filter tank. Soda lime is filled between the isolation ring plate (6) and the outer wall of the filter chamber (13), and a second through hole (12) is provided at the lower part of the filter chamber (13).

6. The waste gas discharge device for pharmaceutical preparation according to claim 5, characterized in that: A first sealing plate (10) for discharging the soda lime is detachably mounted on the bottom of the filter tank.

7. The waste gas discharge device for pharmaceutical preparation according to claim 6, characterized in that: A second sealing plate (11) for discharging the activated carbon is detachably mounted on the first sealing plate (10).

8. The waste gas discharge device for pharmaceutical preparation according to claim 7, characterized in that: The detachable installation method can be connected by bolts and threaded holes.

9. The waste gas discharge device for pharmaceutical preparation according to claim 8, characterized in that: The top of the filter tank is provided with an opening and closing door for filling the soda lime and the activated carbon.

10. The waste gas discharge device for pharmaceutical preparation according to claim 1, characterized in that: Four air inlet pipes (2) are provided and are circumferentially distributed on the filter tank.

Images