Rectification device for chemical synthesis

Abstract

The utility model provides a rectification device for chemical synthesis, and relates to a rectification tower in the technical field of rectification equipment, the front end of the rectification tower is provided with a feed port, the feed port is provided with a filter screen, the inner wall of the rectification tower is fixedly provided with a support ring, the support ring is internally provided with an extension ring, and the extension ring is provided with a baffle. A plurality of sections of separation tower trays are placed on the extension ring, a first filler is mounted below the plurality of sections of separation tower trays, a second filler is mounted at the top of the rectifying tower, a waste gas absorption device is mounted on one side of a condenser of the rectifying tower, and activated carbon is mounted in the waste gas absorption device. According to the device, the waste gas absorption device is arranged on one side of the rectifying tower condenser, and the waste gas is treated by utilizing an activated carbon adsorption technology, so that the emission of volatile organic compounds is effectively reduced, the environmental pollution is reduced, and the environmental protection standard is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to rectification equipment technical field especially relates to a rectification device for chemical synthesis. BACKGROUND

[0002] Rectification is a kind of efficient separation technology based on the boiling point difference of material, is widely used in chemical industry, pharmacy, food, environmental protection etc., is used to extract high-purity target component from mixture, separates high-boiling or low-boiling impurity, separates and recovers the by-product that can be reused etc.;

[0003] Part of rectification device lacks waste gas condensation recovery or tail gas treatment system, leading to volatile organic compounds (VOCs) emission over standard, pollutes the environment, and the unseparated component in waste liquid can be directly discharged, increases the difficulty of subsequent environmental protection treatment, in addition, in rectification device, traditional tray disassembly is difficult, and cleaning is inconvenient, and maintenance cost is high, therefore, we propose a rectification device for chemical synthesis. UTILITY MODEL CONTENT

[0004] The utility model discloses a rectification device for chemical synthesis, which solves the problems of existing technologies, such as lack of waste gas condensation recovery or tail gas treatment system in part of rectification device, leading to volatile organic compounds (VOCs) emission over standard, polluting the environment, and the unseparated component in waste liquid can be directly discharged, increasing the difficulty of subsequent environmental protection treatment, and disassembly of traditional tray in rectification device is difficult, cleaning is inconvenient, and maintenance cost is high.

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

[0006] A rectification device for chemical synthesis, comprising a rectification tower, an inlet is arranged at the front end of the rectification tower, a filter screen is installed at the inlet, a support ring is fixedly installed on the inner wall of the rectification tower, an extension ring is arranged in the support ring, a plurality of separation trays are placed on the extension ring, a first packing is installed below the plurality of separation trays, a second packing is installed at the top of the rectification tower, a waste gas absorption device is installed on one side of the condenser of the rectification tower, and activated carbon is installed in the waste gas absorption device.

[0007] Further, the plurality of separation trays are composed of a plurality of trays, a downcomer is arranged on one side of the plurality of separation trays, the downcomer is welded on the plurality of separation trays, and a plurality of square covers are arranged and distributed on the surface of the trays.

[0008] Further, the spacing between the plurality of trays is 20-30 cm.

[0009] Further, the plurality of separation trays are arranged below the inlet.

[0010] Further, the first packing is Raschig ring packing, and the second packing is corrugated packing.

[0011] Further, the multi-stage separation tray is provided with flexible sealing gaskets, and a spacing of 1mm-3mm is left between the flexible sealing gaskets and the tower wall.

[0012] Further, the material of the support ring is stainless steel.

[0013] Compared with the prior art, the device has the advantages that:

[0014] 1. The device is provided with a waste gas absorption device on one side of the rectifying tower condenser, and the waste gas is treated by using the activated carbon adsorption technology, so that the emission of volatile organic compounds is effectively reduced, the environmental pollution is reduced, the environmental protection standard is met, and through the combined design of the condenser and the waste gas absorption device, part of the volatile components can be condensed and recovered, the utilization rate of resources is increased, and the content of pollutants in the waste gas that is not treated is reduced.

[0015] 2. The first packing (Raschig ring) and the second packing (corrugated packing) are respectively located below the tray and at the top area of the tower, so that the separation requirements under different working conditions are met, accurate separation is realized, the multi-stage separation tray is designed with flexible sealing gaskets, and a proper spacing is left between the tower walls to prevent the thermal expansion and cold shrinkage from affecting the stability of the tray, and the design of the support ring and the extension ring makes the disassembly and cleaning of the tray more convenient, and the maintenance cost is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a kind of overall structure plane schematic diagram of rectifying device for chemical synthesis;

[0017] Figure 2 The utility model provides a kind of support ring structure schematic diagram of rectifying device for chemical synthesis;

[0018] Figure 3 The utility model provides a kind of multi-stage separation tray structure schematic diagram of rectifying device for chemical synthesis;

[0019] Figure 4 The utility model provides a kind of multi-stage separation tray internal dissection schematic diagram of rectifying device for chemical synthesis.

[0020] Legend: 1, rectifying tower;2, multi-stage separation tray;3, waste gas absorption device;101, inlet;102, filter screen;103, support ring;104, extension ring;105, first packing;106, second packing;201, tray;202, downcomer;203, square cover;204, flexible sealing gasket;301, activated carbon. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0022] In order to facilitate the understanding of the present application, the present application will be more fully described below with reference to the related description of the present application, and several embodiments of the present application are given. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar terms as used herein are for the purpose of illustration only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0025] Example 1

[0026] As Figures 1-4As shown, the utility model provides a technical scheme: a rectifying column device for chemical synthesis, including rectifying tower 1, the front end of rectifying tower 1 is provided with inlet 101, and the filter screen 102 is installed at inlet 101, is used to filter the impurity in chemical, and the support ring 103 is fixedly installed on the inner wall of rectifying tower 1, the extension ring 104 is arranged in support ring 103, and the multiple section separation tray 2 is placed on extension ring 104, this design structure is simple, does not need additional fastener, and is also easy to take, the first packing 105 is installed below multiple section separation tray 2, the second packing 106 is installed at the top of rectifying tower 1, and the first packing 105 (thimble ring) and the second packing 106 (corrugated packing) are located below multiple section separation tray 2 and the top area of rectifying tower 1 respectively, meet the separation demand under different working conditions, realize accurate separation, and the condenser of rectifying tower 1 is installed with waste gas absorption device 3 on one side, the activated carbon 301 is installed in waste gas absorption device 3, waste gas is handled, and the emission of volatile organic compounds is effectively reduced.

[0027] Example 2

[0028] As Figures 1-4 Shown, multiple section separation tray 2 has several trays 201, and the side of multiple section separation tray 2 is provided with downcomer 202, and downcomer 202 is welded on multiple section separation tray 2, a plurality of square covers 203 are arranged and distributed on the surface of tray 201, the spacing of a plurality of trays 201 is 20cm-30cm, the spacing is shortened to increase the number of trays and improve separation efficiency, multiple section separation tray 2 is arranged below inlet 101 and is used to handle the preliminary separation of feed liquid, flexible sealing gasket 204 is arranged on the periphery of multiple section separation tray 2, and a spacing is left between flexible sealing gasket 204 and the tower wall, and the spacing is 1mm-3mm, when high-temperature operation occurs in the tower, the reserved spacing prevents the influence of thermal expansion and contraction on the stability of the tray, the first packing 105 is thimble ring packing, and the second packing 106 is corrugated packing, the thimble ring packing further improves the separation efficiency and reduces the upward escape of high-boiling-point components, the corrugated packing at the top of rectifying tower 1 is used for the final purification of gas, ensures that high-boiling-point impurities are intercepted, and the material of support ring 103 is stainless steel, has the characteristics of corrosion resistance, high temperature resistance and mechanical strength, and ensures the long-term stable operation of the device.

[0029] The working process of the utility model: when using a rectifying column device for chemical synthesis, first, check whether the tray, packing, filter screen 102, support ring 103 and extension ring 104 in rectifying tower 1 are firmly installed, and confirm whether the activated carbon 301 in waste gas absorption device 3 is sufficient;

[0030] The mixture is then fed into the rectification tower 1 through the inlet 101, and the filter screen 102 of the inlet 101 filters out the impurities that may exist, preventing the impurities from affecting the subsequent separation operation. The bottom heater starts to heat the raw material, and the raw material is evaporated by heat to form a gas containing different volatile components. The evaporated gas flows upward and passes through the multiple separation trays and the first packing 105 in sequence. The square covers 203 and the downcomers 202 on the trays enhance the gas-liquid contact and promote the separation of components. The raschig ring packing further improves the separation efficiency and reduces the upward escape of high-boiling-point components. The second packing 106 (corrugated packing) at the top of the rectification tower 1 is used for the final purification of the gas, ensuring that the high-boiling-point impurities are intercepted. The purified gas flowing upward enters the top condenser and is cooled into a liquid. The liquid part is refluxed into the rectification tower 1, ensuring stable liquid distribution and component purity in the tower. The remaining part is collected as the rectification product.

[0031] Finally, the gas that is not completely condensed at the top of the rectification tower 1 is transported to the waste gas absorption device 3 through the pipeline. The condenser further cools the waste gas, recovers the condensable volatile components into a liquid, and collects the liquid into a special container. The uncondensed tail gas passes through the activated carbon 301 bed in the device. The activated carbon 301 adsorbs the residual organic matter (such as VOCs) in the waste gas. The treated tail gas is discharged through the tail gas discharge port and meets the emission standard.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rectification apparatus for chemical synthesis, comprising a rectification column (1), characterized by: The front end of the rectifying tower (1) is provided with a feeding port (101), a filter screen (102) is installed at the feeding port (101), a supporting ring (103) is fixedly installed on the inner wall of the rectifying tower (1), an extension ring (104) is arranged in the supporting ring (103), a plurality of separation trays (2) are placed on the extension ring (104), a first filler (105) is installed below the plurality of separation trays (2), a second filler (106) is installed at the top of the rectifying tower (1), a waste gas absorption device (3) is installed on one side of the condenser of the rectifying tower (1), and activated carbon (301) is installed in the waste gas absorption device (3).

2. The rectifying apparatus for chemical synthesis according to claim 1, characterized by: The plurality of separation trays (2) are composed of a plurality of tray plates (201), one side of the plurality of separation trays (2) is provided with a downcomer (202), the downcomer (202) is welded on the plurality of separation trays (2), and the surfaces of the tray plates (201) are provided with a plurality of square covers (203) arranged and distributed.

3. The rectification apparatus for chemical synthesis according to claim 2, characterized by: The spacing between the plurality of tray plates (201) is 20-30 cm.

4. The rectifying apparatus for chemical synthesis according to claim 1, characterized by: The plurality of separation trays (2) are arranged below the feeding port (101).

5. The rectification apparatus for chemical synthesis according to claim 1, characterized by: The first filler (105) is a Rasching ring filler, and the second filler (106) is a corrugated filler.

6. The rectification apparatus for chemical synthesis according to claim 1, characterized by: Flexible sealing gaskets (204) are arranged on the periphery of the plurality of separation trays (2), and a spacing of 1-3 mm is left between the flexible sealing gaskets (204) and the tower wall.

7. The rectification apparatus for chemical synthesis according to claim 1, characterized by: The material of the supporting ring (103) is stainless steel.

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