CN220334844U - Acid-containing waste liquid treatment system of coal chemical methanol recovery tower - Google Patents
Acid-containing waste liquid treatment system of coal chemical methanol recovery tower Download PDFInfo
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- CN220334844U CN220334844U CN202321910490.XU CN202321910490U CN220334844U CN 220334844 U CN220334844 U CN 220334844U CN 202321910490 U CN202321910490 U CN 202321910490U CN 220334844 U CN220334844 U CN 220334844U
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- Prior art keywords
- waste liquid
- pipe
- tower
- recovery tower
- methanol recovery
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 255
- 239000007788 liquid Substances 0.000 title claims abstract description 144
- 239000002699 waste material Substances 0.000 title claims abstract description 99
- 238000011084 recovery Methods 0.000 title claims abstract description 69
- 239000002253 acid Substances 0.000 title claims abstract description 34
- 239000003245 coal Substances 0.000 title claims abstract description 19
- 239000000126 substance Substances 0.000 title claims abstract description 16
- 239000003513 alkali Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010979 pH adjustment Methods 0.000 abstract description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 15
- 229910017604 nitric acid Inorganic materials 0.000 description 15
- 239000012071 phase Substances 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 11
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000032050 esterification Effects 0.000 description 3
- 238000005886 esterification reaction Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010808 liquid waste Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses an acid-containing waste liquid treatment system of a methanol recovery tower in coal chemical industry, which comprises a methanol recovery tower and a liquid inlet pipe connected with the side part of the methanol recovery tower, wherein a reboiler for circularly heating tower kettle liquid is arranged at the lower part of the methanol recovery tower, waste liquid is discharged and conveyed at the bottom of the methanol recovery tower through a tower kettle pump, an upper bypass of the liquid inlet pipe is connected with an alkali liquid pipe, and a waste liquid cooler for reducing the temperature of the waste liquid is arranged on the waste liquid pipe discharged from the outlet of the tower kettle pump. The utility model discloses an increase a waste water cooler at methyl alcohol recovery tower waste liquid pipe to install the PH detector on waste water cooler's technology looks outlet pipe, thereby to waste water cooling with the influence of reduced temperature to acid-containing waste water corruption, reduce the corruption of waste water to the pipeline by a wide margin, still can add the purpose of alkali lye flow according to waste water pH adjustment tower cauldron at any time, thereby reduce the corruption of acid-containing alcohol-containing waste water to follow-up equipment, pipeline, the life-span of process equipment and pipeline behind the extension methyl alcohol recovery tower.
Description
Technical Field
The utility model relates to the field of coal chemical industry methanol recovery towers, in particular to an acid-containing waste liquid treatment system of a coal chemical industry methanol recovery tower.
Background
In the process of preparing glycol from coal, an alcohol-containing acid-containing mixed liquid phase (containing 55% -65% of methanol, 5% -8% of dimethyl carbonate, 16% -22% of water, 2% -4% of nitric acid and a small amount of methyl formate) at the bottom of an esterification system oxidation esterification tower and a diester tower enters a dilute nitric acid recovery tower to recover a large amount of nitric acid contained in the mixed liquid phase, then enters a gas stripping tower to recover a large amount of methanol (Me), dimethyl carbonate (DMC) and Methyl Formate (MF) contained in the liquid phase, and alcohol-containing acid-containing waste liquid (containing about 0.2% -0.5% of nitric acid and about 0.2% -0.7% of methanol) after organic matters are recovered by the methanol recovery tower is finally sent into a waste liquid buffer tank of a waste liquid treatment unit through a waste liquid pipe 5 after the flow rate is regulated by a tower kettle pump 4 (shown in figure 2).
However, the methanol recovery tower is only used for recovering organic matters with lower boiling points such as Me, DMC, MF and the like in the waste liquid of the esterification system, and no treatment means is provided for HNO3 with 0.2-0.5% (wt) remained in the feed, so that the nitric acid content in the waste liquid discharged from the tower bottom of the methanol recovery tower 1 to the downstream system is still about 0.2-0.5% (wt). The dilute HNO3 is strong acid, has very strong corrosiveness to common metals, and the corrosion rate of dilute nitric acid to metals is increased multiple times along with the temperature rise of the dilute HNO 3. The nitric acid content in the waste liquid discharged from the waste liquid pipe 5 of the methanol recovery tower is still 0.2-0.5% (wt), and the temperature (98-103 ℃) is very high, so that the waste liquid has serious corrosion to subsequent steel waste liquid treatment equipment and conveying pipelines.
Therefore, the methanol recovery tower is often stopped due to corrosion and leakage of the subsequent equipment and pipelines. In addition, because the waste liquid is strong in acidity, low in pH value and high in COD, the waste liquid treatment process of the downstream high-salt-content waste liquid is very difficult to treat, the waste liquid treatment cost is greatly increased, and the subsequent normal production of the ethylene glycol device is also very high in safety risk and uncertainty.
Disclosure of Invention
In order to solve the problems, the utility model provides a system for treating acid-containing waste liquid of a methanol recovery tower in coal chemical industry.
The utility model is realized by the following technical scheme:
the utility model provides a coal industry methanol recovery tower contains acid waste liquid processing system, includes the feed liquor pipe that methanol recovery tower and its lateral part are connected, and methanol recovery tower cauldron lower part is provided with the reboiler that the circulation was heated tower cauldron liquid, and the methanol recovery tower bottom carries out the waste liquid to arrange outward through the tower cauldron pump, and the last bypass of feed liquor pipe is connected with alkali lye pipe, is provided with the waste liquid cooler that reduces waste liquid temperature on the waste liquid pipe that tower cauldron pump export was arranged outward.
Further alternatively, a pipeline mixer is arranged on the liquid inlet pipe, and the alkali liquor pipe is connected with the side part of the pipeline mixer.
Further alternatively, the waste liquid cooler and the waste liquid pipe are connected in a bypass mode, the process phase inlet and outlet of the waste liquid cooler are connected with the waste liquid pipe in a bypass mode through the liquid inlet branch pipe and the liquid outlet branch pipe respectively, and the cooling phase inlet and outlet of the waste liquid cooler are connected with the water inlet pipe and the water return pipe of the cooling water pipe network respectively.
Further alternatively, a shut-off valve is installed between the process phase inlet and outlet bypass connection of the waste liquid pipe and the waste liquid cooler, and a waste liquid regulating valve is installed on the waste liquid pipe at the front end of the shut-off valve.
Further alternatively, the methanol recovery tower is further provided with an automatic acid regulating system, and the automatic acid regulating system comprises a PH detector and an alkali liquor regulating valve which are respectively arranged on the liquid discharge branch pipe and the alkali liquor pipe, and the PH detector and the alkali liquor regulating valve are electrically connected with the PLC.
Further alternatively, part of waste liquid is refluxed to the methanol recovery tower through a reflux pipe on a tower kettle pump outlet pipeline to recycle and recover methanol, the top of the methanol recovery tower is subjected to outward feeding treatment through a methanol gas pipe, and the side part of the top of the methanol recovery tower is connected with a top reflux pipe.
Further alternatively, the heating inlet and outlet of the reboiler is connected with a steam inlet pipe and a steam exhaust pipe, the process phase inlet and outlet of the reboiler is circularly connected with the lower part of the tower kettle of the methanol recovery tower through a connecting pipeline, and a circulating pump is arranged on the connecting pipeline.
Further alternatively, the bypass on the liquid inlet pipe is connected with a nitrogen replacement pipeline.
Further alternatively, the liquid inlet pipe, the liquid waste pipe, the return pipe, the alkali liquor pipe, the liquid outlet branch pipe of the liquid inlet branch pipe and the nitrogen gas replacement pipeline are all provided with control valves.
Compared with the prior art, the utility model has the beneficial effects that: the utility model discloses an increase a waste water cooler at methyl alcohol recovery tower waste liquid pipe to install the PH detector on waste water cooler's technology looks outlet pipe, thereby to waste water cooling with the influence of reduced temperature to acid-containing waste water corruption, reduce the corruption of waste water to the pipeline by a wide margin, still can add the purpose of alkali lye flow according to waste water pH adjustment tower cauldron at any time, thereby reduce the corruption of acid-containing alcohol-containing waste water to follow-up equipment, pipeline, the life-span of process equipment and pipeline behind the extension methyl alcohol recovery tower.
Drawings
FIG. 1 is a schematic diagram of the present utility system;
FIG. 2 is a schematic diagram of the prior art of the present utility model;
in the figure: the methanol recovery tower 1, a liquid inlet pipe 2, a reboiler 3, a tower kettle pump 4, a waste liquid pipe 5, a waste liquid regulating valve 6, a return pipe 7, a lye pipe 8, a lye regulating valve 9, a pipeline mixer 10, a PLC 11, a shut-off valve 12, a waste liquid cooler 13, a liquid inlet branch pipe 14, a liquid outlet branch pipe 15, a PH detector 16 and a nitrogen replacement pipeline 17.
Detailed Description
The utility model is described in further detail below with reference to the attached drawings and detailed description:
as shown in figure 1, an acid-containing waste liquid treatment system of a coal chemical methanol recovery tower comprises a methanol recovery tower 1 and a liquid inlet pipe 2 connected with the side part of the methanol recovery tower, wherein a reboiler 3 for circularly heating tower kettle liquid is arranged at the lower part of the tower kettle of the methanol recovery tower 1, waste liquid is discharged and conveyed through a tower kettle pump 4 at the bottom of the methanol recovery tower 1, an alkali liquor pipe 8 is connected to an upper bypass of the liquid inlet pipe 2, a waste liquid cooler 13 for reducing the temperature of the waste liquid is arranged on the waste liquid pipe 5 discharged from the outlet of the tower kettle pump 4, and the temperature of acid-containing waste water can be reduced by the waste liquid cooler 13, so that the corrosiveness of high-temperature acid liquid to a metal pipeline is greatly reduced.
As shown in FIG. 1, a pipeline mixer 10 is arranged on the liquid inlet pipe 2, the alkali liquor pipe 8 is connected with the side part of the pipeline mixer 10, and the pipeline mixer 10 can ensure the uniformity of the mixing of the alkali liquor and the liquid in the liquid inlet pipe 2.
As shown in fig. 1, the waste liquid cooler 13 is connected with the waste liquid pipe 5 by-pass, and is connected with the original waste liquid pipe 5 to ensure normal switching use, the process phase inlet and outlet of the waste liquid cooler 13 are respectively connected with the waste liquid pipe 5 by-pass through the liquid inlet branch pipe 14 and the liquid outlet branch pipe 15, and the cooling phase inlet and outlet of the waste liquid cooler 13 are respectively connected with the water inlet pipe and the water return pipe of the cooling water pipe network.
As shown in fig. 1, a shut-off valve 12 is installed between the process phase inlet and outlet bypass connection of the waste liquid pipe 5 and the waste liquid cooler 13, the waste liquid cooler 13 is put into operation through the closing of the shut-off valve 12, a waste liquid regulating valve 6 is installed on the waste liquid pipe 5 at the front end of the shut-off valve 12, the delivery amount of waste liquid is stable through regulating the opening of the waste liquid regulating valve 6, and the normal operation of the methanol recovery tower 1 is ensured.
As shown in fig. 1, the methanol recovery tower 1 is further provided with an automatic acid regulating system, the automatic acid regulating system comprises a PH detector 16 and an alkali liquor regulating valve 9 which are respectively installed on the liquid discharge branch pipe 15 and the alkali liquor pipe 8, the PH detector 16 and the alkali liquor regulating valve 9 are electrically connected with the PLC controller 11, and the acid-base value is monitored automatically in real time through the automatic acid regulating system so as to regulate the alkali liquor amount of the alkali liquor pipe 8 to stabilize the nitric acid content of the wastewater.
As shown in fig. 1, part of the waste liquid is returned to the methanol recovery tower 1 through a return pipe 7 on an outlet pipeline of the tower kettle pump 4 for recycling methanol, and part of the waste liquid is recycled to the tower kettle pump 4 through the return pipe 7 for processing so as to improve the methanol recovery efficiency of the methanol recovery tower 1, the top of the methanol recovery tower 1 is subjected to outward conveying processing through a methanol gas pipe, and the side part of the top of the methanol recovery tower 1 is connected with a top return pipe.
As shown in figure 1, a heating inlet and a heating outlet of the reboiler 3 are connected with a steam inlet pipe and a steam exhaust pipe, a process phase inlet and a process phase outlet of the reboiler 3 are circularly connected with the lower part of the tower kettle of the methanol recovery tower 1 through a connecting pipeline, and a circulating pump is arranged on the connecting pipeline, so that the continuous heating of the liquid of the methanol recovery tower 1 is realized through the steam heat exchange of the reboiler 3, and the operation of the methanol recovery tower 1 is ensured.
As shown in fig. 1, the liquid inlet pipe 2 is connected with a nitrogen replacement pipeline 17 in a bypass manner, and when the methanol recovery tower 1 is maintained and overhauled, the high-risk gas phase can be discharged through replacement by introducing low-pressure nitrogen into the nitrogen replacement pipeline 17, so that the operation risk of the methanol recovery tower 1 is reduced.
As shown in fig. 1, control valves are arranged on the liquid inlet pipe 2, the liquid waste pipe 5, the return pipe 7, the alkali liquor pipe 8, the liquid discharge branch pipe 15 of the liquid inlet branch pipe 14 and the nitrogen replacement pipeline 17, and the arranged control valves facilitate the switching of the equipment.
The implementation principle of the acid-containing waste liquid treatment system of the coal chemical methanol recovery tower is as follows:
the methanol and nitric acid aqueous solution enters the methanol recovery tower 1 through the liquid inlet pipe 2, the methanol and nitric acid aqueous solution at the tower kettle of the methanol recovery tower 1 is heated and gasified indirectly by 0.5MPa pipe network steam through the reboiler 3, then enters the middle lower part of the methanol recovery tower 1 from the top of the reboiler 3 as ascending air flow, and reflux liquid (alcohol-containing wastewater) entering from a reflux pipe at the tower top above the methanol recovery tower 1 is mixed and then contacts with the ascending air flow in a countercurrent way, so that heat exchange is carried out in the methanol recovery tower 1; methanol with low boiling point and dimethyl carbonate form azeotrope to migrate to gas phase, and finally escape from the top of the tower to the top cooler for cooling and delivery.
The waste water containing about 0.2 to 0.5 percent (wt) of nitric acid and about 0.2 to 0.7 percent (wt) of methanol at the bottom of the methanol recovery tower 1 is conveyed into a waste liquid buffer tank of a waste liquid treatment unit through a tower kettle pump 4 and a waste liquid pipe 5, and finally is conveyed to a high-concentration brine treatment procedure for advanced treatment.
An alkali liquor pipe 8 is arranged on the liquid inlet pipe 2, and alkali liquor (industrial sodium hydroxide aqueous solution) with the concentration of 31.5% -32.5% is added into the liquid inlet pipe 2 through the alkali liquor pipe 8, so that acid-base neutralization is carried out on the residual nitric acid solution in the liquid inlet pipe 2, and corrosiveness on a pipeline of a subsequent process is reduced;
the temperature (98-103 ℃) waste liquid discharged by the tower kettle pump 4 is cooled by the waste liquid cooler 13 (at the moment, the cut-off valve 12 on the waste liquid pipe 5 is in a closed state), and the temperature of the waste liquid is reduced to 40-46 ℃ by the waste liquid cooler 13 and then is sent out, so that the temperature of high-temperature acid-containing waste water is reduced, and the corrosion of the waste water to a pipeline is greatly reduced;
meanwhile, the PH detector 16 can transmit the PH value of the wastewater discharged by the waste liquid cooler 13 detected in real time to the PLC 11, the PLC 11 compares the PH value with a set PH value interval (6.5-7), when the detected value exceeds the interval range, the PLC 11 controls and reduces the opening of the alkali liquor regulating valve 9 on the alkali liquor pipe 8, reduces the alkali liquor amount entering the liquid inlet pipe 2, and when the detected value is lower than the interval range, the PH value of the wastewater discharged by the waste liquor pipe 5 is always in an acid-base balance state, so that the alkali adding amount of the methanol recovery tower is timely adjusted to stabilize the nitric acid content of the wastewater, and finally the aim of reducing the corrosion of the wastewater to equipment pipelines in the subsequent section is integrally achieved, so that the service life of equipment and pipelines is prolonged, and the production cost is reduced.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a coal industry methanol recovery tower contains acid waste liquid processing system, includes feed liquor pipe (2) that methanol recovery tower (1) and its lateral part are connected, and methanol recovery tower (1) tower cauldron lower part is provided with circulation reboiler (3) to tower cauldron liquid heating, and the methanol recovery tower (1) bottom carries out the waste liquid and discharges its characterized in that through tower cauldron pump (4): the upper bypass of feed liquor pipe (2) is connected with alkali lye pipe (8), be provided with waste liquid cooler (13) that reduce waste liquid temperature on waste liquid pipe (5) of tower cauldron pump (4) export outer row.
2. The system for treating the acid-containing waste liquid of the methanol recovery tower for the coal chemical industry according to claim 1, wherein the system comprises the following components: the liquid inlet pipe (2) is provided with a pipeline mixer (10), and the alkali liquor pipe (8) is connected with the side part of the pipeline mixer (10).
3. The system for treating the acid-containing waste liquid of the methanol recovery tower for the coal chemical industry according to claim 1, wherein the system comprises the following components: the waste liquid cooler (13) is connected with the waste liquid pipe (5) in a bypass mode, the process phase inlet and outlet of the waste liquid cooler (13) are connected with the waste liquid pipe (5) in a bypass mode through the liquid inlet branch pipe (14) and the liquid outlet branch pipe (15), and the cooling phase inlet and outlet of the waste liquid cooler (13) are connected with the water inlet pipe and the water return pipe of the cooling water pipe network respectively.
4. The system for treating the acid-containing waste liquid of the methanol recovery tower for the coal chemical industry according to claim 3, wherein: a cut-off valve (12) is arranged between the process phase inlet and outlet bypass connection position of the waste liquid pipe (5) and the waste liquid cooler (13), and a waste liquid regulating valve (6) is arranged on the waste liquid pipe (5) at the front end of the cut-off valve (12).
5. The system for treating the acid-containing waste liquid of the methanol recovery tower for the coal chemical industry according to claim 1, wherein the system comprises the following components: the methanol recovery tower (1) is further provided with an automatic acid regulating system, the automatic acid regulating system comprises a PH detector (16) and an alkali liquor regulating valve (9) which are respectively arranged on the liquid discharge branch pipe (15) and the alkali liquor pipe (8), and the PH detector (16) and the alkali liquor regulating valve (9) are electrically connected with the PLC (11).
6. The system for treating the acid-containing waste liquid of the methanol recovery tower for the coal chemical industry according to claim 1, wherein the system comprises the following components: the methanol recycling device is characterized in that part of waste liquid is refluxed to the methanol recycling tower (1) through a reflux pipe (7) on an outlet pipeline of the tower kettle pump (4) to recycle and recycle methanol, the top of the methanol recycling tower (1) is subjected to outward conveying treatment through a methanol gas pipe, and the side part of the top of the methanol recycling tower (1) is connected with a top reflux pipe.
7. The system for treating the acid-containing waste liquid of the methanol recovery tower for the coal chemical industry according to claim 1, wherein the system comprises the following components: the heating inlet and outlet of the reboiler (3) are connected with a steam inlet pipe and a steam exhaust pipe, the process phase inlet and outlet of the reboiler (3) is circularly connected with the lower part of the tower kettle of the methanol recovery tower (1) through a connecting pipeline, and a circulating pump is arranged on the connecting pipeline.
8. The system for treating the acid-containing waste liquid of the methanol recovery tower for the coal chemical industry according to claim 2, wherein the system comprises the following components: and a nitrogen replacement pipeline (17) is connected to the liquid inlet pipe (2) in a bypass way.
9. The system for treating the acid-containing waste liquid of the methanol recovery tower for the coal chemical industry according to claim 8, wherein the system comprises the following components: control valves are arranged on the liquid inlet pipe (2), the waste liquid pipe (5), the return pipe (7), the alkali liquor pipe (8), the liquid outlet branch pipe (15) of the liquid inlet branch pipe (14) and the nitrogen replacement pipeline (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321910490.XU CN220334844U (en) | 2023-07-20 | 2023-07-20 | Acid-containing waste liquid treatment system of coal chemical methanol recovery tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321910490.XU CN220334844U (en) | 2023-07-20 | 2023-07-20 | Acid-containing waste liquid treatment system of coal chemical methanol recovery tower |
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| CN220334844U true CN220334844U (en) | 2024-01-12 |
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| CN202321910490.XU Active CN220334844U (en) | 2023-07-20 | 2023-07-20 | Acid-containing waste liquid treatment system of coal chemical methanol recovery tower |
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| Country | Link |
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| CN (1) | CN220334844U (en) |
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Address after: 017418 west side of Yili Road, duguitala Town, Hangjin Banner, Ordos City, Inner Mongolia Autonomous Region Patentee after: Ordos Xinrun Energy Co.,Ltd. Country or region after: China Address before: 017418 west side of Yili Road, duguitala Town, Hangjin Banner, Ordos City, Inner Mongolia Autonomous Region Patentee before: ORDOS CITY XINHANG ENERGY CO.,LTD. Country or region before: China |