CN212818211U - Dividing wall tower rectification system - Google Patents
Dividing wall tower rectification system Download PDFInfo
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- CN212818211U CN212818211U CN202021642502.1U CN202021642502U CN212818211U CN 212818211 U CN212818211 U CN 212818211U CN 202021642502 U CN202021642502 U CN 202021642502U CN 212818211 U CN212818211 U CN 212818211U
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Abstract
The utility model relates to a dividing wall tower rectifying system, which comprises a feeding pipeline, a feeding and discharging heat exchanger, a dividing wall tower, a light component discharging pipeline, a condenser, a condensing tank, a middle component discharging pipeline, a middle component product pump and a heavy component discharging pipeline; the middle part in the dividing wall tower is vertically provided with a dividing plate, and the dividing wall tower is internally divided into a tower top area, a pre-fractionation area, a main fractionation area and a tower bottom area; the feeding pipeline is connected to a feeding hole of a prefractionation area of the dividing wall tower after passing through the feeding and discharging heat exchanger, and a light component outlet of a tower top area of the dividing wall tower is connected with a light component discharging pipeline and is connected to a condenser and a condensing tank; the main fractionating area of the dividing wall tower is provided with a middle component outlet and is connected with a middle component discharge pipeline and a middle component product pump; and the tower bottom area of the dividing wall tower is provided with a heavy component outlet and is connected with a heavy component discharge pipeline, and the heavy component discharge pipeline is connected to the feeding and discharging heat exchanger for heat recovery. The utility model discloses can realize three product single-tower separations, reduce area simultaneously, reduce the investment, easily control, can reach ideal product separation effect.
Description
Technical Field
The utility model belongs to the technical field of the dividing wall tower, especially, dividing wall tower rectification system.
Background
The rectification technology is the most widely applied unit operation in the chemical industry field, has many advantages, but is also a part with higher energy consumption and investment in the industrial process, and in the chemical industry and other industries, the energy consumption accounts for more than half of the total energy consumption in the whole process. Therefore, the separation efficiency of the rectifying tower can be improved by designing a novel tower structure, and the energy consumption is reduced at the same time. The most representative of the rectifying tower is a dividing wall tower which is characterized in that a vertical partition plate is arranged in the rectifying tower, and the rectifying tower is divided into four main parts, namely a tower top section, a tower bottom section, a feeding section and a middle side product extraction section which are separated by the partition plate. Generally, for the separation of a ternary mixture, the separation by using a conventional rectifying tower can be realized by sequentially using two conventional towers, and in the utilization of a dividing wall tower, the separation of three components can be realized by using only one single tower, and the specified precise separation requirement can be met. Compared with the traditional two conventional tower sequence flows, the method can save energy by 30-50 percent and save equipment investment by about 30 percent. Despite the above-mentioned significant advantages, the introduction of the concept of dividing wall column in the thirties of the twentieth century to its successful industrial application has been a long time ago, mainly due to the lack of reliable design methods and feasible operation and control schemes, which have affected its widespread use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a dividing wall tower rectifying system, realize the separation of three products single-tower, reduce area simultaneously, reduce the investment.
The utility model provides a its technical problem realize through following technical scheme:
the utility model provides a dividing wall tower rectification system which characterized in that: the device comprises a feeding pipeline, a feeding and discharging heat exchanger, a dividing wall tower, a light component discharge pipeline, a condenser, a condensing tank, a medium component discharge pipeline, a medium component product pump and a heavy component discharge pipeline; the middle part in the dividing wall tower is vertically provided with a dividing plate, and the dividing wall tower is internally divided into a tower top area, a pre-fractionation area, a main fractionation area and a tower bottom area; the feeding pipeline is connected to a feeding hole of a prefractionation area of the dividing wall tower after passing through the feeding and discharging heat exchanger, and a light component outlet of a tower top area of the dividing wall tower is connected with a light component discharging pipeline and is connected to a condenser and a condensing tank; the main fractionating region of the dividing wall tower is provided with a middle component outlet and is connected with a middle component discharge pipeline and a middle component product pump; and the tower bottom area of the dividing wall tower is provided with a heavy component outlet and is connected with a heavy component discharge pipeline, and the heavy component discharge pipeline is connected to the feeding and discharging heat exchanger for heat recovery.
And a pressure control valve is arranged on a light component discharge pipe line behind the condenser, a pressure control bypass is arranged between the condenser and the condensing tank, a bypass communicating valve is arranged on the pressure control bypass, a discharge backflow port of the condensing tank is connected with a backflow pipeline through a backflow pump, the backflow pipeline is connected to the tower top area of the dividing wall tower, and a discharge port of the condensing tank is connected with a discharge pipeline.
And a liquid collecting disc is arranged above the partition plate of the dividing wall tower, a first distribution return pipeline is arranged on the dividing wall tower, the liquid collecting disc is connected with the first distribution return pipeline, the first distribution return pipeline is connected with a second distribution return pipeline and a third distribution return pipeline, the second distribution return pipeline and the third distribution return pipeline are respectively connected back to the pre-fractionation region and the main fractionation region, and the return distribution ratio is adjusted and controlled through control valves arranged on the second distribution return pipeline and the third distribution return pipeline.
And, the inside vertical first bottom baffle that sets up in column foot section, one side that corresponds the prefractionation district in the top of first bottom baffle sets up the second bottom baffle that the level is decurrent, and discharge line connection hydrocone type reboiler is passed through to one side that corresponds the main fractionation district of first bottom baffle, and the exit linkage of hydrocone type reboiler returns column foot section, and one side that corresponds the prefractionation district of first bottom baffle is connected the heavy ends discharge line.
And the top region of the dividing wall tower is provided with 10-25 top trays, the pre-fractionating region is provided with 20-70 pre-fractionating trays, the main fractionating region is provided with 20-70 main fractional flow trays, the bottom of the tower is provided with 10-50 bottom trays, one tray is arranged in the middle of the pre-fractionating tray and is used as a feeding tray, and one tray is arranged in the middle of the main fractionating region and is used as a collecting tray.
The utility model discloses an advantage and beneficial effect do:
1. the utility model discloses a dividing wall tower rectifying system, dividing wall rectifying tower can separate three traditional two towers of product, and the integration is single-tower separation, one set of top of the tower condensing system, and one set of reboiler system at the bottom of the tower has practiced thrift the investment to reduce area, and the energy consumption can reduce 25-30%.
2. The utility model discloses a dividing wall tower rectification system, the light component discharge pipeline behind the condenser is provided with the pressure-controlled valve, is provided with the accuse between condenser and the condensate tank and presses the bypass, sets up bypass joint valve on accuse presses the bypass, and the discharge gate of condensate tank passes through the backwash pump and connects product discharge pipeline and backflow pipeline, and backflow pipeline is connected to the top of the tower district of dividing wall tower; the light component is condensed at the tower top through a condenser and then enters a condensing tank, the tower is controlled by a pressure control valve after being pressed against the condenser at the tower top, a pressure control bypass is arranged at the same time, and differential pressure adjustment is set through a bypass connection valve, so that the tower pressure is controlled; the pressure of the condensing tank is controlled by a tank top pressure regulating valve, and if the product is not condensed, the product can be discharged through the regulating valve; after the light components in the condensing tank are pressurized by a reflux pump, one part of the light components flows back to the tower, and the other part of the light components is sent to the downstream as products.
3. The utility model discloses a dividing wall tower rectifying system, dividing the division board top of wall tower and setting up a collecting tray, set up first distribution return line on dividing the wall tower, the collecting tray is connected first distribution return line, first distribution return line connects second distribution return line, third distribution return line, second distribution return line, third distribution return line connect respectively back to prefractionation district and main fractionation district and through the control valve regulation control return flow distribution that sets up on second distribution return line, the third distribution return line; through the liquid middle section backward flow distribution system that sets up, the automatic regulation control of the liquid reflux distribution ratio of realization division wall tower, liquid reflux distribution can realize continuous regulation in great proportion within range, at liquid reflux distribution in-process, adopt the mode of liquid level and flow cascade control through the design, can realize the control to liquid distribution ratio, can guarantee the steady operation of liquid reflux distribution process again, thereby can realize the independent nimble regulation of liquid reflux distribution of division board both sides, can guarantee to reach the product separation effect of ideal, make the operation control to division wall tower implement easily again.
4. The utility model discloses a dividing wall tower rectifying system, the inside vertical first bottom baffle that sets up in tower bottom district, one side that corresponds the prefractionation district in the top of first bottom baffle sets up the decurrent second bottom baffle of level, discharge line connection hydrocone type reboiler is passed through to one side of the corresponding main fractionation district of first bottom baffle, the exit linkage of hydrocone type reboiler returns the tower bottom district, heavy component discharge line is connected to one side of the corresponding prefractionation district of first bottom baffle, liquid level cascade control flow at the bottom of the tower.
5. The utility model discloses a dividing wall tower rectifying system, the top of the tower district that states the dividing wall tower sets up 10-25 top column plates, the pre-fractionation district sets up 20-70 pre-fractionation column plates, main fractionation district sets up 20-70 main split column plates, set up 10-50 bottom column plates at the bottom of the tower, pre-fractionation column plate middle part sets up an inlet tray, main fractionation district middle part sets up one and adopts the column plate, it is the highest to adopt component concentration in the column plate in the main fractionation district, and accord with the product index, then follow this column plate side line and adopt in the component, the baffle both sides are because the difference of column plate, the pressure differential of every column plate also can slightly be different, nevertheless total pressure differential about the baffle is certain.
6. The utility model discloses a dividing wall tower rectifying system realizes the separation of three products single tower, reduces area simultaneously, reduces the investment, can reach the product separation effect of ideal, divides wall tower operation control to apply easily simultaneously.
Drawings
FIG. 1 is a system flow diagram of the present invention;
fig. 2 is a schematic structural diagram of the dividing wall tower of the present invention.
Reference numerals:
1-feeding pipeline, 2-feeding and discharging heat exchangers, 3-dividing wall tower, 4-light component discharging pipeline, 5-medium component discharging pipeline, 6-condenser, 7-condensing tank, 8-heavy component discharging pipeline, 9-reflux pump, 10-bottom tower pump, 11-siphon reboiler, 12-medium component product pump, 13-pressure control valve, 14-bypass connection valve, 15-pressure control bypass, 16-discharging pipeline, 17-reflux pipeline, 18-first distribution reflux pipeline, 19-third distribution reflux pipeline, 20-distribution reflux pipeline, 21-top tower plate, 22-top tower area, 23-liquid collecting tray, 24-main fractionating area, 25-dividing plate, 26-prefractionating area, 27-prefractionating tower plate, 28-main split tray, 29-second bottom baffle, 30-bottom tray, 31-bottom zone, 31-first bottom baffle.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.
A dividing wall tower rectifying system comprises a feeding pipeline 1, a feeding and discharging heat exchanger 2, a dividing wall tower 3, a light component discharging pipeline 4, a condenser 6, a condensing tank 7, a medium component discharging pipeline 5, a medium component product pump 12 and a heavy component discharging pipeline 10; a partition plate 25 is vertically arranged in the middle of the dividing wall tower, and the dividing wall tower is internally divided into a tower top area 22, a pre-fractionation area 26, a main fractionation area 24 and a tower bottom area 31; the feeding pipeline is connected to a feeding hole of a prefractionation area of the dividing wall tower after passing through the feeding and discharging heat exchanger, and a light component outlet of a tower top area of the dividing wall tower is connected with a light component discharging pipeline and is connected to a condenser and a condensing tank; the main fractionating region of the dividing wall tower is provided with a middle component outlet and is connected with a middle component discharge pipeline and a middle component product pump; the tower bottom area of the dividing wall tower is provided with a heavy component outlet and is connected with a heavy component discharge pipeline 8, and the heavy component discharge pipeline is connected to a feeding and discharging heat exchanger through a tower bottom pump 10 for heat recovery.
A pressure control valve 13 is arranged on a light component discharge pipeline behind the condenser, a pressure control bypass 15 is arranged between the condenser and the condensing tank, a bypass communicating valve 14 is arranged on the pressure control bypass, a discharge reflux port of the condensing tank is connected with a reflux pipeline 17 through a reflux pump 9, and the reflux pipeline is connected to a tower top area of the dividing wall tower. The discharge port of the condensing tank is connected with a discharge pipeline 16.
A liquid collecting disc 23 is arranged above a partition plate of the dividing wall tower, a first distribution return pipeline 18 is arranged on the dividing wall tower, the liquid collecting disc is connected with the first distribution return pipeline, the first distribution return pipeline is connected with a second distribution return pipeline 20 and a third distribution return pipeline 19, the second distribution return pipeline and the third distribution return pipeline are respectively connected back to the pre-fractionation region and the main fractionation region, and the return distribution ratio is adjusted and controlled through control valves arranged on the second distribution return pipeline and the third distribution return pipeline.
Inside vertical first bottom baffle 32 that sets up in column foot district, correspond one side in the prefractionation district in the top of first bottom baffle and set up the decurrent second bottom baffle 29 of level, discharge line connection hydrocone type reboiler 11 is passed through to one side in the corresponding main fractionation district of first bottom baffle, for dividing the wall column provides the heat source, and the exit linkage of hydrocone type reboiler returns column foot district, and one side in the corresponding prefractionation district of first bottom baffle is connected heavy ends discharge line.
The tower top area of the dividing wall tower is provided with 1-17 top trays 21, the pre-fractionating area is provided with 20-40 pre-fractionating trays 27, the main fractionating area is provided with 20-35 main fractionating trays 28, the tower bottom is provided with 10-20 bottom trays 30, the middle part of the pre-fractionating tray is provided with one tray as a feeding tray, and the middle part of the main fractionating area is provided with one tray as a collecting tray.
The working process of the dividing wall tower rectifying system comprises the following steps:
1) feeding: preheating a raw material containing light, medium and heavy components to be separated by a feed pipeline and a feed and discharge heat exchanger, and then feeding the raw material into a feed inlet of a pre-fractionation area of the dividing wall tower, wherein the conveying pressure of the feed pipeline is 1-2bar higher than the operating pressure of the dividing wall tower;
2) and (3) fractionating by a dividing wall column: raw materials enter a prefractionating area of a dividing wall tower, light components flow to the upper part of the tower under the interaction of vapor and liquid, heavy components flow to the lower part of the dividing wall tower, liquid from the upper part of the dividing wall tower and steam from the lower part of the dividing wall tower are distributed to two sides of a partition plate according to a certain proportion, the liquid at the upper part plays a role of reflux, the steam at the lower part plays a role of steam stripping, the separation among three product components is realized, and middle components are concentrated to the specification requirement of the product on a middle tower tray of a main fractionating section and are extracted by the tower tray;
3) and (3) backflow distribution: the light component is condensed by a condenser at the tower top and then enters a condensing tank, the pressure control valve of the dividing wall tower after being pressed against the condenser is controlled, and meanwhile, the pressure difference is adjusted by a bypass connection valve on a pressure control bypass between the condenser and the condensing tank, so that the tower pressure is controlled;
4) discharging: the heavy component product in the tower bottom area of the divided wall tower is pumped to a feeding and discharging heat exchanger through a tower bottom pump, and is sent to the downstream after heat is recovered; the tower bottom area is connected to the siphon reboiler, and the export of siphon reboiler is connected back to the tower bottom area, provides the heat source for dividing the wall tower.
The following processes of the dividing wall tower rectification system are adopted for treating the material condition for different raw materials:
the raw materials are as follows: a naphtha fraction, a first fraction of the total naphtha,
the product is as follows: overhead product (light component) C3/C4 product;
a (medium) light naphtha product is taken off at the side;
(heavies) heavy naphtha product.
The product index requirement is as follows:
light components: C3/C4 product (overhead product);
indexes are as follows: the maximum content of C5 is 0.5 mol%;
the medium component is as follows: light naphtha production (side cut);
indexes are as follows: the maximum content of C3/C4 was 1.0% by weight and the end point TBP (LV) was 70 ℃.
The dividing wall tower is designed as follows: 17 top trays are arranged in the tower top area, 33 pre-fractionation trays are arranged in the pre-fractionation area), 31 main fractionation trays are arranged in the main fractionation area, and 16 bottom trays are arranged at the tower bottom. The 10 th from top to bottom in the pre-fractionating tower plate is a feeding plate, the 14 th from top to bottom in the main fractionating tower plate is a extraction tower plate, and the extraction is carried out on the tower plate at the extraction temperature of 130 ℃.
Feeding pressure: 3.5barg at 35 ℃, passing through a feed-discharge heat exchanger, preheating, and then feeding into a tower at 70 ℃; operating pressure in the top area of the divided wall tower: 0.5barg, temperature 90 ℃, condensing pot operating pressure: 0.7barg, temperature 25 ℃; operating pressure in the tower bottom area of the divided wall tower: 1.4barg, temperature 150 ℃. The product yields are shown in table 1 and the product compositions are shown in table 2.
The product yields are shown in table 1 and the product compositions are shown in table 2.
TABLE 1 product yield
| Feeding of the feedstock | Light component | Middle component | Heavy fraction | |
| Product yield (wt%) | 100 | 22.9 | 7.6 | 69.5 |
TABLE 2 product composition
Example 2:
the raw materials are as follows: the feed of the aromatic hydrocarbon is extracted,
the product is as follows: the overhead product (light component) benzene product;
a toluene product (middle component) is extracted from the side line;
the bottom product (heavy component) is heavy aromatics product. The product index requirement is as follows:
light components: benzene product (overhead product);
indexes are as follows: greater than 99.9 mass%;
the medium component is as follows: toluene product (side cut);
indexes are as follows: more than 99.9 mass%.
The dividing wall tower is designed as follows: 22 top trays are arranged in the tower top area, 55 pre-fractionation trays are arranged in the pre-fractionation area), 53 main fractionation trays are arranged in the main fractionation area, and 23 bottom trays are arranged at the tower bottom. The 24 th from top to bottom in the pre-fractionating tower plate is a feeding plate, the 40 th from top to bottom in the main fractionating tower plate is a drawing tower plate, and the drawing temperature is 137 ℃.
Feeding pressure: 4.0barg at 40 ℃, passing through a feed-discharge heat exchanger, preheating, and then feeding into a tower at 75 ℃; operating pressure in the top area of the divided wall tower: 0.5barg, temperature 92 ℃, condensing pot operating pressure: 0.7barg, temperature 30 ℃; operating pressure in the tower bottom area of the divided wall tower: 1.4barg, temperature 152 ℃. The product yields are shown in table 3, and the product compositions are shown in table 4.
TABLE 3 product yield
| Feeding of the feedstock | Light component | Middle component | Heavy fraction | |
| Product yield (wt%) | 100.0 | 43.7 | 55.3 | 0.5 |
TABLE 4 product composition
| Composition (wt%) | Feeding of the feedstock | Light component | Middle component | Heavy fraction |
| C6-non-aromatic hydrocarbons | 0.00 | 0.00 | 0.00 | 0.00 |
| Benzene and its derivatives | 43.64 | 99.95 | 0.00 | 0.00 |
| C7-non-aromatic hydrocarbons | 0.03 | 0.02 | 0.03 | 0.00 |
| Toluene | 56.04 | 0.03 | 99.90 | 65.45 |
| C8-non-aromatic hydrocarbons | 0.04 | 0.00 | 0.07 | 0.90 |
| Ethylbenzene production | 0.04 | 0.00 | 0.00 | 7.65 |
| Meta-xylene | 0.06 | 0.00 | 0.00 | 10.71 |
| Para-xylene | 0.07 | 0.00 | 0.00 | 13.75 |
| Ortho-xylene | 0.01 | 0.00 | 0.00 | 1.53 |
| Water (W) | 0.07 | 0.00 | 0.00 | 0.00 |
| In all | 100.00 | 100.00 | 100.00 | 100.00 |
Example 3:
the raw materials are as follows: reformate feed
The product is as follows: overhead product (light component) C6/C7 product;
a side draw (middle component) xylene product;
bottoms product (heavies) C9+ product.
The product index requirement is as follows:
light components: C6/C7 product (overhead product);
indexes are as follows: the content of C8 aromatic hydrocarbon is less than or equal to 0.5 wt%;
the medium component is as follows: xylene production (side cut);
indexes are as follows: the content of C8 aromatic hydrocarbon is more than or equal to 99.3 wt%, and the recovery rate of C8 aromatic hydrocarbon is more than or equal to 99%;
heavy component: c9+ product;
indexes are as follows: the content of C8 aromatic hydrocarbon is less than or equal to 0.5 wt%.
The dividing wall tower is designed as follows: the tower top region is provided with 13 top tower plates, the pre-fractionation region is provided with 67 pre-fractionation tower plates, the main fractionation region is provided with 65 main fractionation tower plates, and the tower bottom is provided with 48 bottom tower plates. The 38 th from top to bottom in the pre-fractionating tower plate is a feeding plate, the 20 th from top to bottom in the main fractionating tower plate is a extraction tower plate, and extraction is carried out on the tower plate at the extraction temperature of 161 ℃.
Feeding pressure: 4.5barg, at 45 ℃, passing through a feed-discharge heat exchanger, preheating, and then entering a tower at 75 ℃; operating pressure in the top area of the divided wall tower: 1barg, temperature 96 ℃, condensing pot operating pressure: 0.8barg, temperature 35 ℃; operating pressure in the tower bottom area of the divided wall tower: 1.8barg, temperature 160 ℃. The product yields are shown in table 5 and the product compositions are shown in table 6.
TABLE 5 product yield
| Feeding of the feedstock | Light component | Middle component | Heavy fraction | |
| Product yield (wt%) | 100.0 | 42.5 | 22.2 | 35.3 |
TABLE 6 product composition
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, alterations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and thus the scope of the invention is not limited to the embodiments and drawings disclosed.
Claims (5)
1. The utility model provides a dividing wall tower rectification system which characterized in that: the device comprises a feeding pipeline, a feeding and discharging heat exchanger, a dividing wall tower, a light component discharge pipeline, a condenser, a condensing tank, a medium component discharge pipeline, a medium component product pump and a heavy component discharge pipeline; the middle part in the dividing wall tower is vertically provided with a dividing plate, and the dividing wall tower is internally divided into a tower top area, a pre-fractionation area, a main fractionation area and a tower bottom area; the feeding pipeline is connected to a feeding hole of a prefractionation area of the dividing wall tower after passing through the feeding and discharging heat exchanger, and a light component outlet of a tower top area of the dividing wall tower is connected with a light component discharging pipeline and is connected to a condenser and a condensing tank; the main fractionating region of the dividing wall tower is provided with a middle component outlet and is connected with a middle component discharge pipeline and a middle component product pump; and the tower bottom area of the dividing wall tower is provided with a heavy component outlet and is connected with a heavy component discharge pipeline, and the heavy component discharge pipeline is connected to the feeding and discharging heat exchanger for heat recovery.
2. The dividing wall column rectification system according to claim 1, wherein: a pressure control valve is arranged on a light component discharge pipe line behind the condenser, a pressure control bypass is arranged between the condenser and the condensing tank, a bypass communicating valve is arranged on the pressure control bypass, a discharge backflow port of the condensing tank is connected with a backflow pipeline through a backflow pump, the backflow pipeline is connected to a tower top area of the dividing wall tower, and a discharge port of the condensing tank is connected with a discharge pipeline.
3. The dividing wall column rectification system according to claim 1, wherein: a liquid collecting disc is arranged above a partition plate of the dividing wall tower, a first distribution backflow pipeline is arranged on the dividing wall tower and connected with the first distribution backflow pipeline, the first distribution backflow pipeline is connected with a second distribution backflow pipeline and a third distribution backflow pipeline, the second distribution backflow pipeline and the third distribution backflow pipeline are respectively connected with the pre-fractionation region and the main fractionation region, and backflow distribution ratio is adjusted and controlled through control valves arranged on the second distribution backflow pipeline and the third distribution backflow pipeline.
4. The dividing wall column rectification system according to claim 1, wherein: the inside vertical first bottom baffle that sets up in column foot district, correspond one side in the prefractionation district in the top of first bottom baffle and set up the decurrent second bottom baffle of level, discharge line connection hydrocone type reboiler is passed through to one side in the corresponding main fractionation district of first bottom baffle, and the exit linkage of hydrocone type reboiler returns column foot district, and one side in the corresponding prefractionation district of first bottom baffle is connected the heavy ends discharge line.
5. The dividing wall column rectification system according to claim 1, wherein: the top region of the dividing wall tower is provided with 10-25 top tower plates, the pre-fractionating region is provided with 20-70 pre-fractionating tower plates, the main fractionating region is provided with 20-70 main fractional flow tower plates, the bottom of the tower is provided with 10-50 bottom tower plates, one tower plate is arranged in the middle of the pre-fractionating tower plates and is used as a feeding tower plate, and one tower plate is arranged in the middle of the main fractionating region and is used as a collecting tower plate.
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| CN111905397A (en) * | 2020-08-10 | 2020-11-10 | 张家港保税区慧鑫化工科技有限公司 | Dividing wall tower rectification system and technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111905397A (en) * | 2020-08-10 | 2020-11-10 | 张家港保税区慧鑫化工科技有限公司 | Dividing wall tower rectification system and technology |
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