CN218421926U - Methanol recovery device for pre-tower non-condensable gas - Google Patents
Methanol recovery device for pre-tower non-condensable gas Download PDFInfo
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- CN218421926U CN218421926U CN202122044061.6U CN202122044061U CN218421926U CN 218421926 U CN218421926 U CN 218421926U CN 202122044061 U CN202122044061 U CN 202122044061U CN 218421926 U CN218421926 U CN 218421926U
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Abstract
The utility model provides a tower noncondensable gas methyl alcohol recovery unit in advance draws out pipeline one to the washing tower of the same way behind tower noncondensable gas blow-down governing valve in advance, it is used for adding the washing water to connect desalination water pipeline two on the washing tower, desalination water pipeline two is equipped with governing valve one, is equipped with the frequency conversion fan at the washing tower top to be equipped with gate valve one at frequency conversion fan entry, the frequency conversion fan export is equipped with check valve and gate valve two, frequency conversion fan export connects to former accident torch blow-down pipeline through pipeline three, is equipped with the waste liquid outward-feeding centrifugal pump on the washing tower bottom through pipeline four, and the centrifugal pump entry is equipped with gate valve three, and the centrifugal pump export is equipped with governing valve two, cuts off gate valve and gate valve four around the governing valve, and the alcohol-containing waste water after the washing is sent out to gasification coal slurry preparation system through pipeline five and is regarded as the slurrying water. The utility model discloses can improve gasifier gas production, practice thrift partial coal slurry preparation water simultaneously, energy saving and consumption reduction.
Description
Technical Field
The utility model belongs to the technical field of methyl alcohol rectification system, in particular to tower noncondensable gas methyl alcohol recovery unit in advance.
Background
The venting temperature of the non-condensable gas of the pre-tower originally designed in the methanol rectification system is 40 ℃, the content of gas phase methanol is 24.6 percent (V), and the gas phase flow rate is 304Nm 3 The flow rate of the corresponding gas phase methanol is calculated to be 74.8Nm by conversion 3 H is used as the reference value. Compared with the devices of the same type, in the high temperature period in summer, because the heat load of the pre-tower is unreasonable to control, the ambient temperature is high, the heat exchange temperature difference of the air cooler of the pre-tower is small, the heat exchange difference of the water cooler is poor and other factors influence, the temperature of the non-condensable gas of the pre-tower is higher than the designed value, the partial pressure of the methanol saturated steam in the gas phase rises along with the rising of the emptying temperature, the corresponding methanol flow rate is in a linear rising trend, the flow rate of the non-condensable gas of the pre-tower is increased along with the rising of the emptying temperature, even exceeds the measuring range of a flow meter, and the methanol entrainment loss is serious.
Disclosure of Invention
In order to overcome above-mentioned prior art's not enough, the utility model aims to provide a tower noncondensable gas methyl alcohol recovery unit in advance carries out recycle to the part methyl alcohol that tower noncondensable gas smugglied secretly in advance, retrieves partial loss methyl alcohol, supplyes to gasification coal slurry preparation system in to reach partial methyl alcohol and organic compound residual carbon recycle, improve gasifier gas production, practice thrift partial coal slurry preparation water simultaneously, reach energy saving and consumption reduction's purpose.
In order to realize the purpose, the utility model discloses a technical scheme is:
the utility model provides a tower noncondensable gas methyl alcohol recovery unit in advance draws out pipeline one to the washing tower of the same way behind tower noncondensable gas blow-down governing valve in advance, connect desalination water pipeline two on the washing tower and be used for adding the washing water, desalination water pipeline two is equipped with governing valve 1, is equipped with the variable frequency fan at the washing tower top to be equipped with gate valve one 2 at variable frequency fan entry, the export of variable frequency fan is equipped with check valve 3 and gate valve two 4, the export of variable frequency fan connects to former torch accident blow-down pipeline through pipeline three, is equipped with the waste liquid outward-feeding centrifugal pump on the washing tower bottom is equipped with pipeline four, and the centrifugal pump entry is equipped with gate valve three 5, and the centrifugal pump export is equipped with governing valve two 6, cuts off gate valve 7 and gate valve four 8 around the governing valve, and the alcohol-containing waste water after the washing is exported to gasification coal slurry preparation system through pipeline five and is as slurrying water.
And a pall ring packing and a wire mesh demister are arranged in the washing tower.
And a regulating valve bypass gate valve 9 is arranged in parallel on the regulating valve II 6, the regulating valve front and rear cutoff gate valve 7 and the gate valve IV 8.
The first pipeline is phi 100, the second pipeline is phi 40, the third pipeline is phi 100, the fourth pipeline is phi 50, and the fifth pipeline is phi 50.
The utility model has the advantages that:
the utility model discloses with the part in the tower noncondensable gas methanol recovery in advance, in the supplementary gasification slurry coal preparation system to reach in the tower noncondensable gas methanol and organic compound residual carbon recycle in advance, improve gasifier gas production, practice thrift partial slurry coal preparation water simultaneously, reach energy saving and consumption reduction's purpose.
Methanol in the pre-tower non-condensable gas is washed and recovered by desalted water in a water washing tower, and the methanol and part of light component organic compounds at the entrainment part of the pre-tower non-condensable gas are recovered to a gasified coal slurry preparation system, so that the aims of recycling the pre-tower non-condensable gas carbon residue and improving the gas yield of the gasification furnace are fulfilled.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): as shown in fig. 1:
a pipeline I is led out to a newly-added washing tower after an original pre-tower non-condensable gas emptying regulating valve, desalted water (a pipeline II) is used as washing water in the washing tower, and a regulating valve I1 is arranged on the desalted water pipeline, so that the washing water quantity can be timely adjusted according to the discharge flow of the pre-tower non-condensable gas, and the purpose of timely adjusting the washing effect is achieved;
pall ring packing and a wire mesh demister are arranged in the washing tower and used for ensuring the washing effect;
the top of the washing tower is provided with a variable frequency fan, the inlet of the variable frequency fan is provided with a first gate valve 2, the outlet of the variable frequency fan is provided with a check valve 3 and a second gate valve 4, the outlet of the fan is connected to an original accident torch emptying pipeline through a third pipeline, variable frequency adjustment is carried out on the variable frequency fan according to the pressure of the pre-tower and the discharge flow of non-condensable gas, the control of the pressure of the pre-rectifying tower is intervened, the check valve at the outlet is used for preventing the gas in the torch pipeline from flowing back to the rectifying tower after the pressure of the accident torch is higher than the pressure of the pre-tower, and the pressure control influence is produced on the rectifying tower products and the tower;
and a waste liquid outward-conveying centrifugal pump is arranged at the bottom (a pipeline IV) of the washing tower, a gate valve III 5 is arranged at the inlet of the centrifugal pump, a regulating valve II 6 is arranged at the outlet of the centrifugal pump, a front and rear cutting gate valve 7 of the regulating valve, a gate valve IV 8 and a bypass gate valve 9 of the regulating valve are arranged at the front and rear cutting gate valves, and the washed alcohol-containing wastewater is externally conveyed to a gasified coal slurry preparation system through a pipeline V to be used as pulping water. The outlet regulating valve of the centrifugal pump is interlocked with the liquid level of the washing tower, and is automatically controlled, so that the liquid level stability of the washing tower is ensured, and the centrifugal pump is prevented from being pumped out.
The utility model discloses it is poor because of ambient temperature height causes tower back air cooling and water-cooling effect in advance to have alleviated high temperature season in summer, leads to tower noncondensable gas emission temperature in advance to rise, and loss increase, the problem of system energy consumption increase are smugglied secretly to methyl alcohol. Implement the utility model discloses behind the project, the noncondensable gas gaseous phase methanol content of tower in advance can reduce more than 50% at least, and former noncondensable gas average temperature of tower in advance is at 50 ℃, and corresponding methanol loss is 206kg/h, then implements the utility model discloses afterwards, methanol loss 103kg/h. The annual running time is calculated according to 7200h, the unit price of the methanol is calculated according to 2000 yuan, and at least 148.3 ten thousand yuan is saved all year round.
The utility model discloses a theory of operation:
the non-condensable gas of the pre-tower enters from the bottom of the washing tower, passes through the packing layer and the demister and is sent out from the top. Desalted water enters from the upper part of the washing tower, is sprayed by a spray head and then falls downwards, pre-tower non-condensable gas in the packing layer is fully contacted and absorbed with water, methanol and other organic light components in the non-condensable gas are washed and then return to the bottom of the washing tower, the washed non-condensable gas is sent to a gasification coal slurry preparation working section through a centrifugal pump to be used as water for coal slurry preparation, and most organic matters in the pre-tower non-condensable gas are recovered. The washing tower is a vertical spraying washing packed tower, and the pall ring packing has a large specific surface area and is used for increasing the contact area between two fluids and improving the washing effect.
Claims (4)
1. The utility model provides a tower noncondensable gas methyl alcohol recovery unit in advance, its characterized in that draws out pipeline one to the washing tower of the same way behind the tower noncondensable gas blow-down governing valve in advance, it is used for adding the washing water to connect desalination water line two on the washing tower, desalination water line two is equipped with governing valve one (1), is equipped with the frequency conversion fan at the washing tower top to gate valve one (2) are equipped with at frequency conversion fan entry, and the frequency conversion fan export is equipped with check valve (3) and gate valve two (4), frequency conversion fan export connects to former accident blow-down pipeline through pipeline three, is equipped with the waste liquid outward delivery centrifugal pump on the washing tower bottom through pipeline four, and the centrifugal pump entry is equipped with gate valve three (5), and the centrifugal pump export is equipped with governing valve two (6), cuts off gate valve (7) and gate valve four (8) around the governing valve, and the alcohol-containing waste water after the washing sends to gasification coal slurry preparation system through pipeline five outward as the slurrying water.
2. The pre-tower non-condensable gas methanol recovery device according to claim 1, wherein a pall ring packing and a wire mesh demister are arranged in the washing tower.
3. The pre-tower non-condensable gas methanol recovery device according to claim 1, wherein a regulating valve bypass gate valve (9) is arranged on the regulating valve II (6), the regulating valve front and rear cutoff gate valve (7) and the gate valve IV (8) in parallel.
4. The pre-tower non-condensable gas methanol recovery device according to claim 1, wherein the first pipeline is phi 100, the second pipeline is phi 40, the third pipeline is phi 100, the fourth pipeline is phi 50, and the fifth pipeline is phi 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122044061.6U CN218421926U (en) | 2021-08-27 | 2021-08-27 | Methanol recovery device for pre-tower non-condensable gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122044061.6U CN218421926U (en) | 2021-08-27 | 2021-08-27 | Methanol recovery device for pre-tower non-condensable gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218421926U true CN218421926U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122044061.6U Active CN218421926U (en) | 2021-08-27 | 2021-08-27 | Methanol recovery device for pre-tower non-condensable gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218421926U (en) |
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2021
- 2021-08-27 CN CN202122044061.6U patent/CN218421926U/en active Active
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