CN219963985U - Device for grading and enhancing effect of refined methanol product - Google Patents
Device for grading and enhancing effect of refined methanol product Download PDFInfo
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- CN219963985U CN219963985U CN202321260731.0U CN202321260731U CN219963985U CN 219963985 U CN219963985 U CN 219963985U CN 202321260731 U CN202321260731 U CN 202321260731U CN 219963985 U CN219963985 U CN 219963985U
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- methanol
- pump
- tank
- product
- recovery tower
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 390
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims abstract description 17
- 230000002195 synergetic effect Effects 0.000 claims description 8
- 230000009466 transformation Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 150000001298 alcohols Chemical class 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 ethanol Chemical class 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a device for grading and enhancing the efficiency of a refined methanol product, which comprises a recovery tower (1), a recovery tower product conveying pump (2) connected with the recovery tower, and a crude methanol storage tank (13) connected with the recovery tower product conveying pump, and is characterized in that the recovery tower product conveying pump is sequentially connected with a first methanol intermediate tank (3) and a second methanol intermediate tank (4); a first methanol delivery pump (5) is connected with the first methanol intermediate tank, and a second methanol delivery pump (6) is connected with the second methanol intermediate tank; the first methanol intermediate tank and the second methanol intermediate tank are connected with a methanol finished product tank (7); the methanol finished product tank) is connected with a first loading pump (8) and a second loading pump (9) at the same time; the first loading pump is connected with the loading crane pipe (10); the second methanol delivery pump and the second loading pump are connected with a crude methanol storage tank (13). The utility model realizes the function of separately storing and grading sales of the refined methanol product, has stable transformation operation and flexible operability, and can create better economic benefit and environmental protection benefit for enterprises.
Description
Technical Field
The utility model relates to a technical method for optimizing and reforming a coal-to-methanol rectification process flow, belongs to the technical field of coal-to-methanol production, and is particularly suitable for technical optimization of a four-tower rectification device of methanol.
Background
The methanol rectifying process consists of a pre-rectifying tower, a pressurized rectifying tower, an atmospheric rectifying tower and a methanol recovery tower. The main process production principle is as follows: the crude methanol is subjected to a pre-rectifying tower to remove light components (mainly dissolved CO) 2 Alkane components), separating refined methanol and other heavy components by a pressurized rectifying tower and an atmospheric rectifying tower respectively, extracting refined methanol products, and separatingHigher alcohols (mainly ethanol, etc.) and moisture. Because the higher alcohols and the water separated by the atmospheric tower contain a considerable proportion of methanol, the methanol component is recovered by re-separation treatment of the recovery tower, and finally the methanol component, the higher alcohols and the water in the crude methanol are effectively separated by a four-tower rectification process.
In the actual operation process, because of different feed components of each tower, the ethanol content (average value 400 ppm) in the refined methanol product extracted by the recovery tower is far higher than the ethanol content (average value 40 ppm) in the products extracted by the pressurizing tower and the normal pressure tower, and the high-ethanol product of the recovery tower can only meet the common clients with low requirements on ethanol indexes and cannot meet the requirements of the high-end clients (not higher than 50 ppm) although all the high-ethanol product reaches the national standard quality of the high-quality product, so that the refined methanol of the recovery tower is not extracted as the product methanol in the operation process and is returned to the crude methanol tank for rectification. Therefore, in the full-load operation process of the system, the capacity of crude methanol in the front system is larger than the disposal capacity of the rectification system, the stock of the crude methanol rises, the crude methanol has to be sold regularly to avoid the crude methanol rising, but the selling price of the crude methanol is far lower than that of the refined methanol, and the economy of directly selling the crude methanol is poor, so that research and analysis are necessary, the optimization and transformation are carried out on the existing process flow, the low-benefit selling of the crude methanol is avoided, the operation cost of the system is reduced, and the maximization of benefits is realized.
Accordingly, those skilled in the art have focused on developing a methanol product staging enhancement device that overcomes the above-described drawbacks.
Disclosure of Invention
The utility model aims to provide a device for grading and synergy of a refined methanol product, which overcomes the defects of recovery of the refined methanol product and low-benefit sales of a crude methanol product caused by higher ethanol content of a recovery tower product of a rectification system in the prior art.
The aim of the utility model is realized by the following technical scheme:
the device comprises a recovery tower, a recovery tower product conveying pump connected with the recovery tower, and a crude methanol storage tank connected with the recovery tower product conveying pump, wherein the recovery tower product conveying pump is sequentially connected with a first methanol intermediate tank and a second methanol intermediate tank; a first methanol delivery pump is connected with the first methanol intermediate tank, and a second methanol delivery pump is connected with the second methanol intermediate tank; the first methanol intermediate tank and the second methanol intermediate tank are connected with a methanol finished product tank; the methanol finished product tank is connected with the first loading pump and the second loading pump at the same time; the first loading pump is connected with the loading crane pipe; and the second methanol delivery pump and the second loading pump are connected with the crude methanol storage tank.
The first methanol intermediate tank is also communicated with the overhaul underground tank.
The overhauling underground tank is communicated with an underground tank pump, and the underground tank pump is connected with a crude methanol storage tank.
After transformation, the utility model has the following beneficial effects:
the utility model is provided with two methanol intermediate storage tanks, a methanol finished product storage tank, two methanol delivery pumps, two methanol loading pumps and a methanol underground collecting tank. The recovery tower product originally sent to the crude methanol tank is stored and sold in a grading way through the newly added methanol grading synergistic device, so that the rectifying operation cost is reduced, the safe and stable operation level of the production device is effectively improved by recovering the high-ethanol methanol therein.
Drawings
FIG. 1 is a schematic diagram of the present utility model, numbered: 1-recovery tower (original system), 2-recovery tower product delivery pump (original system), 3-first methanol intermediate tank, 4-second methanol intermediate tank, 5-first methanol delivery pump, 6-second methanol delivery pump, 7-methanol finished product tank, 8-first loading pump, 9-second loading pump, 10-loading crane pipe, 11-overhaul underground tank, 12-underground tank pump and 13-crude methanol storage tank (original system).
Detailed Description
The device for grading and enhancing the efficiency of the refined methanol product shown in fig. 1 comprises a recovery tower 1 (original system), a recovery tower product conveying pump 2 (original system), a first methanol intermediate tank 3, a second methanol intermediate tank 4, a first methanol conveying pump 5, a second methanol conveying pump 6, a methanol finished product tank 7, a first loading pump 8, a second loading pump 9, a loading crane pipe 10, an overhaul underground tank 11, an underground tank pump 12 and a crude methanol storage tank 13 (original system).
Refined methanol produced by a methanol rectifying and recycling tower 1 of a primary production system is sent into a first methanol intermediate tank 3 and a second methanol intermediate tank 4 through a recycling tower product conveying pump 2, and is sent into a methanol finished product storage tank 7 for storage through a first methanol conveying pump 5 and a second methanol conveying pump 6 after being detected to be qualified. The refined methanol in the finished methanol storage tank 7 is pressurized by the first loading pump 8 and the second loading pump 9 and then is sent to the original production system methanol loading crane pipe 10 for loading, and is supplied to common customers with low requirements on ethanol indexes. When the detection is unqualified, unqualified methanol in the first methanol intermediate tank 3, the second methanol intermediate tank 4 and the methanol finished product storage tank 7 can be respectively pressurized and returned to the crude methanol storage tank 13 of the original production system through the first methanol delivery pump 5, the second methanol delivery pump 6, the first loading pump 8 and the second loading pump 9. The first methanol intermediate tank 3, the second methanol intermediate tank 4, the methanol finished product tank 7 and accessory equipment adopt airtight discharge when being overhauled, methanol in the equipment is sent into an overhauling underground tank 11 through a discharging pipeline to be collected, and the collected methanol is conveyed into a crude methanol storage tank 13 of an original production system by an underground tank pump 12 to be processed by a rectification system.
Before transformation, the refined methanol extracted from the recovery tower is returned to the rectification system as crude methanol due to higher ethanol content; and sold as crude methanol at a selling price of 1730 yuan/ton.
TABLE 1 running cost data sheet for rectification system
Then: the rectification cost per ton of refined methanol is 106.49 yuan.
After reconstruction and use, the system runs at full load in the period of 5 months and 6 months, and the average daily production of refined methanol by the grading synergistic device is 56.6 tons; and 7 months and 8 months of system shutdown maintenance, maintaining 65% load operation of the rectification system after production recovery, and adding a grading and synergy device during the period to produce 36.8 tons of refined methanol on average daily basis.
TABLE 2 New incremental step synergistic plant yield summary
As refined methanol sales, the selling price is 2143.36 yuan/ton (average value of sales in the last half year of 2022)
(1) The yield actually generated after the improvement of the newly added grading synergistic device is as follows:
(2143.36-1730-106.49) × (36.8+56.6) ×61≡ 174.84 ten thousand yuan
(2) The newly added grading synergistic device can be expected to generate the following economic benefits:
(2143.36-1730-106.49). Times.56.6X1340. Apprxeq. 590.54 ten thousand yuan/year
The improvement cost of the newly added grading synergistic device is about 555 ten thousand yuan, including pipes, equipment, valves, construction and the like, and the cost of the pipes, the equipment and the like is about 55.5 ten thousand yuan each year according to the 10-year depreciation calculation
Therefore: the expected wound efficiency of the new grading synergistic device is 590.54-55.5= 535.04 ten thousand yuan/year.
The utility model realizes the function of separately storing and grading sales of the refined methanol products, overcomes a series of problems of the four-tower rectification system such as the recovery tower product of high ethanol content, the recovery of the refined methanol products, the low-benefit sales of the crude methanol products and the like, has stable transformation operation, advanced technology and flexible operability, can create better economic benefit and environmental benefit for enterprises, has reference significance for similar coal chemical methanol rectification projects, and has wide popularization and application prospect.
Claims (3)
1. The refined methanol product grading synergistic device comprises a recovery tower (1), a recovery tower product conveying pump (2) connected with the recovery tower (1), and a crude methanol storage tank (13) connected with the recovery tower product conveying pump (2), and is characterized in that the recovery tower product conveying pump (2) is sequentially connected with a first methanol intermediate tank (3) and a second methanol intermediate tank (4); a first methanol delivery pump (5) is connected with the first methanol intermediate tank (3), and a second methanol delivery pump (6) is connected with the second methanol intermediate tank (4); the first methanol intermediate tank (3) and the second methanol intermediate tank (4) are connected with a methanol finished product tank (7); the methanol finished product tank (7) is connected with the first loading pump (8) and the second loading pump (9) at the same time; the first loading pump (8) is connected with the loading crane pipe (10); the second methanol delivery pump (6) and the second loading pump (9) are connected with the crude methanol storage tank (13).
2. The refined methanol product grading and enhancing device according to claim 1, wherein the first methanol intermediate tank (3) is also communicated with an overhaul underground tank (11).
3. The refined methanol product grading and enhancing device according to claim 2, wherein the overhauling underground tank (11) is communicated with an underground tank pump (12), and the underground tank pump (12) is connected with a crude methanol storage tank (13).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320578850 | 2023-03-22 | ||
| CN2023205788504 | 2023-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219963985U true CN219963985U (en) | 2023-11-07 |
Family
ID=88590215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321260731.0U Active CN219963985U (en) | 2023-03-22 | 2023-05-23 | Device for grading and enhancing effect of refined methanol product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219963985U (en) |
-
2023
- 2023-05-23 CN CN202321260731.0U patent/CN219963985U/en active Active
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