Distillation separation tower in chemical process device

Abstract

The utility model relates to the technical field of chemical recovery processes, in particular to a distillation separation tower in a chemical process device, which comprises a distillation separation tower body, a tower top dephlegmator, an oil-water separation device, a distillation device, a solution inlet, a tower bottom tank and a non-condensable gas outlet, a tower top dephlegmator, an oil-water separation device, a distillation device and a heat supply device are sequentially arranged in the distillation separation tower body from top to bottom, the oil-water separation device is tightly attached to the inner wall of the distillation separation tower body, a tower bottom groove is formed in the bottom of the distillation separation tower body, a non-condensable gas outlet is formed in the top of the distillation separation tower body, and the distillation device is arranged in the tower bottom groove. A solution inlet is formed in the side face of the distillation device, the tower bottom groove is connected with a reboiler, and a liquid outlet of the reboiler is connected with the solution entry.The device has the advantages that the purpose of chemical integrated operation of distillation, condensation cooling and oil-water separation is achieved, the occupied area is small, investment is reduced, and operation procedures and workload are reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical recycling technology, and in particular to a distillation separation tower in a chemical process device. Background Technology

[0002] Traditional chemical product recovery processes mainly recover byproducts such as raw coal gas produced during coke production in coke ovens. These byproducts include tar, crude benzene, hydrogen sulfide, ammonia, and naphthalene, which can both purify the coal gas and recover byproducts with higher economic value from the raw coal gas.

[0003] In traditional chemical product recovery processes, the common production process for separating byproducts from raw coal gas involves a distillation column. This column utilizes the combined action of the stripping and rectifying sections to separate light and heavy components, and reflux increases the content of light components in the gaseous phase at the top of the column. A condenser connected to the top of the column condenses and cools the light gaseous components, transforming them from a gaseous phase to a liquid phase. The cooled light components then enter an oil-water separator for further separation, achieving the separation of light components from the water-containing fraction. In this chemical process, both the condenser and oil-water separator operate outside the distillation column, resulting in numerous process pipelines and control valves. Each piece of equipment requires a foundation, leading to a large footprint, high investment, and increased operational complexity due to the multiple processes and valves, hindering the integration and automation of chemical production. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a distillation separation tower for chemical process equipment. It adopts a distillation separation tower body with a bottom groove as the main structure, and sets an oil-water separation device and a top separator in the upper part of the tower body. This achieves the purpose of integrated chemical operation of distillation, condensation and cooling, and oil-water separation, with a small footprint, reduced investment, and reduced operation procedures and workload.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A distillation separation tower in a chemical process unit includes a distillation separation tower body, a top separator, an oil-water separator, a distillation unit, a solution inlet, a bottom tank, and a non-condensable gas outlet. The top separator, oil-water separator, distillation unit, and heating unit are sequentially arranged from top to bottom inside the distillation separation tower body. The oil-water separator is installed close to the inner wall of the distillation separation tower body. A bottom tank is located at the bottom of the distillation separation tower body, and a non-condensable gas outlet is located at the top of the distillation separation tower body. A solution inlet is located on the side of the distillation unit. The bottom tank is connected to a reboiler, and the liquid outlet of the reboiler is connected to the solution inlet.

[0007] Furthermore, the oil-water separation device is provided with a separated water outlet and a medium outlet on the outer wall of the distillation separation tower body.

[0008] Furthermore, the non-condensable gas outlet is connected to a vacuum pump and a flue gas scrubber.

[0009] Furthermore, the distillation apparatus adopts a tray form, and the number of trays is set according to the properties of the separation medium material.

[0010] Furthermore, the distillation apparatus employs a packing structure, with the packing height set according to the properties of the separating medium.

[0011] Furthermore, a redistributor is provided in the distillation apparatus in the form of a packing material.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) The condenser and oil-water separator are moved into the distillation tower as components of the new structure of the distillation tower. The top separator, oil-water separator and distillation unit are arranged vertically inside the distillation tower body. The condenser-separation-distillation arrangement is reasonable, the structure is compact, the tower body structure has high strength, the footprint is small and the investment cost is low.

[0014] 2) The distillation separation tower does not require complicated valve operation and excessive process pipeline connection. It is simple to operate, easy to maintain, reduces manual workload, has high chemical gas recovery efficiency, and can realize the integration and automation of chemical production operation.

[0015] 3) The bottom tank of the tower serves as an intermediate storage tank for the heavy components after distillation. The heavy components are used to heat the materials in the distillation unit, realizing the secondary utilization of heat, avoiding energy waste, and improving heat utilization efficiency.

[0016] 4) The number of trays and the height of packing are set according to the properties of the separation medium to improve the mass transfer and separation effect of the material. The separation effect of light and heavy components of the medium is good and the separation efficiency is high. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a distillation separation tower in a chemical process device according to the present invention.

[0018] Figure 2 This is a top view of the distillation separation tower structure in a chemical process device according to this utility model.

[0019] Figure 3 This is a process flow diagram of a distillation separation tower in a chemical process device described in this utility model.

[0020] In the diagram: 1. Distillation column body; 2. Distillation apparatus; 3. Oil-water separation apparatus; 4. Top separator; 5. Bottom tank; 6. Solution inlet; 7. Non-condensable gas outlet; 8. Separated water outlet; 9. Medium outlet; 10. Reboiler. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0022] In the description of this patent, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0023] For ease of description, spatial relative terms such as "above," "over," "on the upper surface," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly. Unless otherwise stated, the above terms have no special meaning and should not be construed as limiting the scope of protection of this utility model.

[0024] like Figure 1-3As shown, the working principle of a distillation separation tower in a chemical process unit is as follows: Based on the original distillation tower structure, a top separator 4 is installed at the top of the distillation separation tower body 1. This allows the light components rising after separation by the distillation device 2 inside the distillation separation tower body 1 to be condensed and cooled within the distillation separation tower body 1. The non-condensable gas is discharged into the flue gas scrubber through the non-condensable gas outlet 7 at the top of the tower via a vacuum pump. Below the top separator 4, an oil-water separator 3 is installed. The light components condensed and cooled by the top separator 4 flow by gravity through the tower wall to the oil-water separator 3 for oil-water separation. The separated water in device 3 can be discharged from the top and stored in an ammonia tank. The medium with a density greater than water can be discharged from the bottom of the oil-water separation device 3 and then refluxed and sent out by a pump. A distillation device 2 is set at the bottom of the oil-water separation device 3. The distillation device 2 is equipped with different numbers of trays or different packing heights according to different media materials to improve the mass transfer and separation effect of the materials. A bottom tank 5 is set at the bottom of the distillation separation tower body 1. The bottom tank 5 is connected to the reboiler. The bottom tank 5 delivers a high-temperature heavy component to the reboiler 10. The heavy component is used to preheat the raw material in the reboiler 10 to realize the secondary utilization of heat.

[0025] like Figure 1-3As shown, a distillation separation tower in a chemical process unit includes a distillation separation tower body 1, a top separator 4, an oil-water separator 3, a distillation unit 2, a solution inlet 6, a bottom tank 5, and a non-condensable gas outlet 7. The top separator 4 is installed at the top of the distillation separation tower body 1, the oil-water separator 3 is installed below the top separator 4, and the distillation unit 2 is installed below the oil-water separator 3. The top separator 4, the oil-water separator 3, and the distillation unit 2 are vertically arranged inside the distillation separation tower body 1. The oil-water separator 3 is installed close to the inner wall of the distillation separation tower body 1. The distillation tower body 1 has a bottom tank 5 at its bottom and a non-condensable gas outlet 7 at its top. The distillation apparatus 2 has a solution inlet 6 on its side. The raw material solution enters the distillation apparatus 2 of the distillation tower body 1 through the solution inlet 6. After distillation by the distillation apparatus 2, the light components rise and pass through the oil-water separator 3, entering the top separator 4. After being condensed and cooled by the top separator 4, the gas flows by gravity through the inner wall of the tower into the oil-water separator 3. The condensed non-condensable gas is discharged into the flue gas scrubber through the non-condensable gas outlet 7 at the top of the tower via a vacuum pump. The oil-water separator 3 separates water and other media from the light components. The separated water can be discharged from the upper separated water outlet and stored in an ammonia tank. Media with a density greater than water can be discharged from the lower media outlet 9 of the oil-water separator 3, and then refluxed and sent out by a pump. The refluxed media enters the distillation tower body 1 through the solution inlet 6. This refluxed solution enters the distillation apparatus 2 and plays a role in mass transfer, increasing the product concentration of the gas phase at the top of the tower. The bottom tank 5 is connected to the reboiler 10, and the liquid outlet of the reboiler 10 is connected to the solution inlet 6. The heavy component separated by the distillation unit 2 descends, retaining most of its heat. Most of the heavy component enters the heating device in the bottom of the column to exchange heat and provide heat for the distillation unit. The remaining heavy component enters the bottom tank 5, which acts as an intermediate tank connecting the heavy components and sends them to the reboiler 10. The reboiler 10 receives both the heavy component and the raw material solution, and uses the heavy component to preheat the raw material solution in the reboiler 10, thus realizing the secondary utilization of heat.

[0026] Furthermore, a water separation outlet 8 and a medium outlet 9 are respectively provided on the outer wall of the distillation separation tower body 1 at the location of the oil-water separation device 3, with the water separation outlet 8 located at the top and the medium outlet 9 located at the bottom.

[0027] Furthermore, the distillation apparatus 2 adopts a tray form, and the number of trays is set according to the properties of the separation medium material.

[0028] Furthermore, the distillation apparatus 2 is made of packing material, and the packing height is set according to the properties of the separation medium.

[0029] Furthermore, a redistributor is provided in the distillation apparatus 2 in the form of a packing material.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A distillation separation tower in a chemical process unit, comprising a distillation separation tower body, a top separator, an oil-water separation device, a distillation device, a solution inlet, a bottom tank, and a non-condensable gas outlet, characterized in that, The distillation separation tower body is provided with a top separator, an oil-water separator, a distillation unit, and a heating unit arranged sequentially from top to bottom. The oil-water separator is installed close to the inner wall of the distillation separation tower body. A bottom groove is provided at the bottom of the distillation separation tower body. A non-condensable gas outlet is provided at the top of the distillation separation tower body. A solution inlet is provided on the side of the distillation unit. The bottom groove is connected to a reboiler. The liquid outlet of the reboiler is connected to the solution inlet.

2. The distillation separation tower in a chemical process unit according to claim 1, characterized in that, The oil-water separation device is provided with a water outlet and a medium outlet on the outer wall of the distillation separation tower.

3. The distillation separation tower in a chemical process unit according to claim 1, characterized in that, The non-condensable gas outlet is connected to a vacuum pump and a flue gas scrubber.

4. The distillation separation tower in a chemical process unit according to claim 1, characterized in that, The distillation apparatus is in the form of trays, and the number of trays is set according to the properties of the materials to be separated.

5. A distillation separation tower in a chemical process unit according to claim 1, characterized in that, The distillation apparatus uses a packing material, and the packing height is set according to the properties of the separation medium.

6. A distillation separation tower in a chemical process unit according to claim 5, characterized in that, A redistributor is provided in the packing-type distillation apparatus.

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