CN217191292U - Material washing device for 2-methyl-5-nitroimidazole - Google Patents
Material washing device for 2-methyl-5-nitroimidazole Download PDFInfo
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- CN217191292U CN217191292U CN202221025371.1U CN202221025371U CN217191292U CN 217191292 U CN217191292 U CN 217191292U CN 202221025371 U CN202221025371 U CN 202221025371U CN 217191292 U CN217191292 U CN 217191292U
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- 238000005406 washing Methods 0.000 title claims abstract description 133
- FFYTTYVSDVWNMY-UHFFFAOYSA-N 2-Methyl-5-nitroimidazole Chemical compound CC1=NC=C([N+]([O-])=O)N1 FFYTTYVSDVWNMY-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 title claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 26
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000010790 dilution Methods 0.000 claims abstract description 14
- 239000012895 dilution Substances 0.000 claims abstract description 14
- 239000008399 tap water Substances 0.000 claims abstract description 14
- 235000020679 tap water Nutrition 0.000 claims abstract description 14
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 11
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 11
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 11
- 239000012452 mother liquor Substances 0.000 claims description 30
- 238000003860 storage Methods 0.000 claims description 18
- 238000005086 pumping Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 230000020477 pH reduction Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 description 4
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- VAOCPAMSLUNLGC-UHFFFAOYSA-N metronidazole Chemical compound CC1=NC=C([N+]([O-])=O)N1CCO VAOCPAMSLUNLGC-UHFFFAOYSA-N 0.000 description 1
- 229960000282 metronidazole Drugs 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a washing device of 2-methyl-5-nitroimidazole, which comprises a liquid holding tank, an elevated tank I, a pump and a centrifugal filter device; the top of the centrifugal filter device is provided with a water inlet pipe, the bottom of the centrifugal filter device is connected with the top of the liquid containing pool, and the left side of the centrifugal filter device is connected with the synthesis device; the water inlet pipe is externally connected with a tap water supply pipeline; the bottom of the liquid containing pool is respectively provided with a water outlet pipe; the pump is connected with the water outlet pipe; the top of the elevated tank I is connected with a pump, and the bottom of the elevated tank I is connected with a synthesis device; and the first washing water is pumped into the head tank I by the pump and is used as dilution water for synthesizing the 2-methyl-5-nitroimidazole in the next pot in the synthesis device. The utility model can recycle the washing water, reduce the resource waste and improve the resource utilization rate; the ammonium sulfate in the washing water can be recovered, and the product discharged by the washing water can be returned to the centrifugal filter again, so that the yield is improved.
Description
Technical Field
The utility model relates to a chemical product production technical field, concretely relates to 2-methyl-5 nitroimidazole wash material device.
Background
2-methyl-5-nitroimidazole is an important raw material intermediate, is obtained by nitration reaction of 2-methylimidazole, and is mainly used for preparing medicaments of metronidazole and dimeconazole; the molecular formula is as follows: c 4 H 5 N 3 O 2 Molecular weight: 127.1.
the 2-methyl-5-nitroimidazole is obtained by nitrifying 2-methylimidazole. The preparation method comprises the following steps: sequentially adding sulfuric acid, 2-methylimidazole and ammonium sulfate into a reaction kettle, stirring and heating, dropwise adding nitric acid at the temperature of 150 ℃ and 160 ℃, and continuing to react for 1h after the addition is finished. Cooling to below 140 deg.C, adding water, adjusting pH to 3.5-4 with ammonia water, and separating out crystal. Filtering, washing to neutrality, and drying to obtain 2-methyl-5-nitroimidazole.
After the 2-methyl-5-nitroimidazole is prepared, the 2-methyl-5-nitroimidazole is washed to remove sulfate and recover ammonium sulfate. In the past, all the washing water is directly put into a liquid containing pool and then concentrated to obtain ammonium sulfate. The method not only can cause a great deal of waste of the washing water, but also can improve the production cost; moreover, since the amount of the washing water used is too large, a part of the product is taken away, which leads to a reduction in yield and a reduction in economic efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a washing device of 2-methyl-5-nitroimidazole, which can recycle washing water, reduce resource waste and improve the resource utilization rate; the ammonium sulfate in the washing water can be recovered, and the product discharged by the washing water can be returned to the centrifugal filter again, so that the yield is improved.
In order to realize the purpose, the utility model adopts the following technical proposal:
a washing device for 2-methyl-5-nitroimidazole comprises a liquid containing tank, an elevated tank I, a pump and a centrifugal filter device; the top of the centrifugal filter device is provided with a water inlet pipe, the bottom of the centrifugal filter device is connected with the top of the liquid containing pool, and the left side of the centrifugal filter device is connected with the synthesis device; the water inlet pipe is externally connected with a tap water supply pipeline; the bottom of the liquid containing pool is respectively provided with a water outlet pipe; the pump is connected with the water outlet pipe; the top of the elevated tank I is connected with a pump, and the bottom of the elevated tank I is connected with a synthesis device; and the first washing water is pumped into the head tank I by the pump and is used as dilution water for synthesizing the 2-methyl-5-nitroimidazole in the next pot in the synthesis device.
Furthermore, a control valve I is arranged on a connecting pipeline between the elevated tank I and the pump, and a control valve II is arranged on a connecting pipeline between the elevated tank I and the synthesis device.
Further, the device also comprises a head tank II, a head tank III and a head tank IV; the high-level tank II, the high-level tank III and the high-level tank IV are connected in parallel, the top of the high-level tank II is connected with a pump, and the bottom of the high-level tank III is connected with a water inlet pipe; pumping the second washing water into the elevated tank II by using a pump for the first washing of the next pot in the centrifugal filter device; pumping the third washing water into the elevated tank III by using a pump for second washing of the next pot in the centrifugal filter device; and pumping the fourth washing water into the elevated tank IV by using a pump for the third washing of the next pot in the centrifugal filter-throwing device.
Furthermore, a control valve III is arranged on a connecting pipeline between the elevated tank II and the pump, and a control valve IV is arranged on a connecting pipeline between the elevated tank II and the water inlet pipe; a control valve V is arranged on a connecting pipeline between the elevated tank III and the pump, and a control valve VI is arranged on a connecting pipeline between the elevated tank III and the water inlet pipe; and a control valve VII is arranged on a connecting pipeline between the elevated tank IV and the pump, and a control valve VIII is arranged on a connecting pipeline between the elevated tank IV and the water inlet pipe.
Further, the device also comprises a mother solution storage tank; the left side of the mother liquor storage tank is connected with a pump, the pump pumps the mother liquor subjected to centrifugal filtration into the mother liquor storage tank, and the mother liquor is concentrated to obtain ammonium sulfate which is used for feeding in the acidification process of producing 2-methyl-5-nitroimidazole; and a control valve IX is arranged on a connecting pipeline between the mother liquor storage tank and the pump.
Furthermore, a flowmeter is arranged on the water inlet pipe.
The utility model discloses a theory of operation and process are as follows:
the synthesis and dilution of the 2-methyl-5-nitroimidazole are carried out in a synthesis device, the synthesized and diluted 2-methyl-5-nitroimidazole is sent to a centrifugal filter device, after the centrifugal filter device centrifugally filters the 2-methyl-5-nitroimidazole, a control valve IX is opened, a pump is started, the mother liquor after centrifugal filter is pumped into a mother liquor storage tank, and the solid is left in the centrifugal filter device for washing.
When materials are washed for the first time, tap water is connected, and the materials are injected into the centrifugal filter device through the water inlet pipe to be washed for the first time; after the first washing is finished, opening a control valve I and starting a pump, and pumping the first washing water into a head tank I to be used as dilution water for synthesizing 2-methyl-5-nitroimidazole in the next pot; continuously connecting tap water to carry out secondary material washing; after the second washing is finished, opening the control valve III and starting the pump to pump the second washing water into the elevated tank II as the first washing water of the next pot; continuously connecting tap water to carry out third material washing; after the second washing is finished, opening the control valve V and starting the pump to pump the third washing water into the elevated tank III to be used as the second washing water of the next pot; continuously connecting tap water to carry out fourth material washing; after the second washing is finished, opening the control valve VII and starting the pumping pump to pump the fourth washing water into the elevated tank IV to be used as the third washing water of the next pot; and after the fourth washing, taking out the 2-methyl-5-nitroimidazole, and finishing the first pot washing.
Continuing to synthesize in the synthesizing device, opening a control valve II after synthesizing is finished, and feeding first washing water in the upper pot in the elevated tank I into the synthesizing device to dilute the product; after dilution, the mother liquor enters a centrifugal filter device for centrifugal filter, after centrifugal filter, a control valve IX is opened, a suction pump is started, the mother liquor is sucked into a mother liquor storage tank, and solid is left in the centrifugal filter device for second-pot washing; opening a control valve IV, feeding the second-time material washing water of the previous pot in the elevated tank II into a centrifugal filter device, and carrying out first-time material washing of the second pot; after the first-time material washing is finished, opening the control valve I and starting the pump, pumping the material washing water into the head tank I, and continuously using the material washing water as dilution water for synthesizing the 2-methyl-5-nitroimidazole in the next pot. Opening the control valve VI, injecting the third washing water of the previous pot in the elevated tank III 3 into the centrifugal filter device, and carrying out the second washing of the second pot; and after the second time of material washing, opening the control valve III and starting the pump to pump the material washing water into the elevated tank II to continue to be used as the first time of material washing water of the next pot. Opening a control valve VIII, injecting fourth washing water of the previous pot in the elevated tank IV into the centrifugal filter device, and carrying out third washing on the second pot; and after the third washing is finished, opening the control valve V and starting the pump to pump the washing water into the elevated tank III to be continuously used as the second washing water of the next pot. And (3) connecting tap water to enter the centrifugal filter-throwing device, washing the second pot for the fourth time, opening the control valve VII and starting the pump after the washing is finished, and pumping the washing water into the head tank IV to be continuously used as the third washing water of the next pot of mother liquor. And after the four times of material washing in the second pot are finished, taking out the 2-methyl-5-nitroimidazole, and finishing the material washing in the second pot.
The above steps are repeated in a circulating way, and the operations of synthesis, dilution, centrifugal filtration and material washing are carried out.
The utility model has the advantages of compared with the prior art:
the utility model sets four elevated tanks of washing water according to the concentration of ammonium sulfate in the washing water, each elevated tank has own specific source and destination, and can store and recycle different washing water in classification, thereby improving the concentration of ammonium sulfate in the centrifugal filter device and reducing the cost; meanwhile, the washing water is recycled, so that the using amount of the washing water is reduced, the resources are saved, the cost is reduced, a large amount of washing water can be prevented from carrying away products, the yield of the 2-methyl-5-nitroimidazole is improved, and the economic benefit is improved.
2. The utility model discloses can get rid of the mother liquor after straining with the heart and store mother liquor storage tank in, the mother liquor obtains the ammonium sulfate through the concentration and can be used for producing the feeding of 2-methyl-5-nitroimidazole acidizing in-process, has further improved resource utilization, reduce cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
the numbers and names in the figure are as follows:
1-elevated tank I; 2-elevated tank II; 3-elevated tank III; 4-elevated tank IV; 5-liquid containing pool; 6-pumping; 7-water inlet pipe; 8-water outlet pipe; 9-centrifugal filter throwing device; 10-a flow meter; 11-control valve I; 12-control valve II; 13-control valve iii; 14-control valve IV; 15-control valve V; 16-control valve VI; 17-control valve VII; 18-control valve viii; 19-control valve ix; 20-a synthesis unit; 21-mother liquor storage tank.
Detailed Description
In the following, an embodiment of the present invention will be described in detail with reference to the drawings, but it should be understood that the scope of the present invention is not limited by the embodiment. It should be understood that the directions "up", "down", "left" and "right" in the following embodiments of the present invention are all based on the position of the corresponding drawing. These terms are used for convenience of description only and do not represent limitations on the specific embodiments of the present invention. Unless otherwise specified, like reference numerals in the reference numerals refer to like structures.
A washing device for 2-methyl-5-nitroimidazole comprises a liquid containing tank 5, an elevated tank I1, a pump 6 and a centrifugal filter-throwing device 9; the top of the centrifugal filter-throwing device 9 is provided with a water inlet pipe 7, the bottom of the centrifugal filter-throwing device is connected with the top of the liquid containing pool 5, and the left side of the centrifugal filter-throwing device is connected with the synthesis device 20; the water inlet pipe 7 is externally connected with a tap water supply pipeline; the bottom of the liquid containing pool 5 is respectively provided with a water outlet pipe 8; the pump 6 is connected with the water outlet pipe 8; the top of the elevated tank I1 is connected with a pump 6, and the bottom is connected with a synthesis device 20; the first washing water is pumped into the elevated tank I1 by the pump 6 and is used as dilution water for synthesizing 2-methyl-5-nitroimidazole in the next pot in the synthesis device 20.
And a control valve I11 is arranged on a connecting pipeline between the elevated tank I1 and the pump 6, and a control valve II 12 is arranged on a connecting pipeline between the elevated tank I1 and the synthesis device 20.
The device also comprises a head tank II 2, a head tank III 3 and a head tank IV 4; the elevated tank II 2, the elevated tank III 3 and the elevated tank IV 4 are connected in parallel, the top parts of the elevated tanks are connected with a pump 6, and the bottom parts of the elevated tanks are connected with a water inlet pipe 7; the pump 6 pumps the second washing water into the elevated tank II 2 for the first washing of the next pot in the centrifugal filter 9; the pump 6 pumps the third washing water into the elevated tank III 3 for second washing of the next pot in the centrifugal filter 9; and pumping the fourth washing water into the elevated tank IV 4 by the pump 6 for the third washing of the next pot in the centrifugal filter-throwing device 9.
A control valve III 13 is arranged on a connecting pipeline between the elevated tank II 2 and the pump 6, and a control valve IV 14 is arranged on a connecting pipeline between the elevated tank II and the water inlet pipe 7; a control valve V15 is arranged on a connecting pipeline between the elevated tank III 3 and the pump 6, and a control valve VI 16 is arranged on a connecting pipeline between the elevated tank III and the water inlet pipe 7; and a control valve VII 17 is arranged on a connecting pipeline between the head tank IV 4 and the pump 6, and a control valve VIII 18 is arranged on a connecting pipeline between the head tank IV and the water inlet pipe 7.
Also comprises a mother liquid storage tank 21; the left side of the mother liquor storage tank 21 is connected with a pump 6, the pump 6 pumps the mother liquor subjected to centrifugal filtration into the mother liquor storage tank 21, and the mother liquor is concentrated to obtain ammonium sulfate which is used for feeding in the acidification process of producing 2-methyl-5-nitroimidazole; a control valve IX 19 is arranged on a connecting pipeline of the mother liquid storage tank 21 and the suction pump 6.
The water inlet pipe 7 is provided with a flowmeter 10.
The utility model discloses a working method does:
the synthesis and dilution of the 2-methyl-5-nitroimidazole are carried out in a synthesis device 20, the synthesized and diluted 2-methyl-5-nitroimidazole is sent into a centrifugal throw filter device 9, after the centrifugal throw filter device 9 centrifugally throws and filters the 2-methyl-5-nitroimidazole, a control valve IX 19 is opened, a suction pump 6 is started, the mother liquor after centrifugal throw filter is pumped into a mother liquor storage tank 21, and the solid is left in the centrifugal throw filter device 9 for washing.
When materials are washed for the first time, tap water is connected, and the materials are injected into the centrifugal filter device 9 through the water inlet pipe 7 to be washed for the first time; after the first washing is finished, opening a control valve I11 and starting a pump 6, and pumping the first washing water into a head tank I1 to be used as dilution water for synthesizing 2-methyl-5-nitroimidazole in the next pot; continuously connecting tap water to carry out secondary material washing; after the second washing is finished, opening the control valve III 13 and starting the pump 6 to pump the second washing water into the elevated tank II 2 to be used as the first washing water of the next pot; continuously connecting tap water to carry out third material washing; after the second washing is finished, opening a control valve V15 and starting a pump 6, and pumping third washing water into the elevated tank III 3 to be used as second washing water of the next pot; continuously connecting tap water to carry out fourth material washing; after the second washing is finished, opening the control valve VII 17 and starting the pump 6 to pump the fourth washing water into the elevated tank IV 4 to be used as the third washing water of the next pot; and after the four times of material washing is finished, taking out the 2-methyl-5-nitroimidazole, and finishing the material washing in the first pot.
The synthesis is continued in the synthesis device 20, after the synthesis is finished, the control valve II 12 is opened, and the first washing water in the upper pot in the elevated tank I1 enters the synthesis device 20 to dilute the product; after dilution, the diluted solution enters a centrifugal filter-throwing device 9 for centrifugal filter-throwing, after centrifugal filter-throwing, a control valve IX 19 is opened, a pump 6 is started, mother liquor is pumped into a mother liquor storage tank 21, and solid is left in the centrifugal filter-throwing device 9 for second pot washing; opening a control valve IV 14, and feeding the second washing water in the upper pot in the elevated tank II 2 into a centrifugal filter device 9 to carry out the first washing in the second pot; after the first time of material washing, the control valve I11 is opened and the pump 6 is started, and the material washing water is pumped into the elevated tank I1 and continuously used as dilution water for synthesizing 2-methyl-5-nitroimidazole in the next pot. Opening a control valve VI 16, injecting third washing water of the previous pot in the elevated tank III 3 into the centrifugal filter device 9, and carrying out second washing of the second pot; after the second time of washing, the control valve III 13 is opened and the pump 6 is started to pump the washing water into the elevated tank II 2, and the washing water continues to be used as the first time of washing water of the next pot. Opening a control valve VIII 18, injecting fourth washing water of the upper pot in the elevated tank IV 4 into the centrifugal filter-throwing device 9, and carrying out third washing on the second pot; after the third time of washing, the control valve V15 is opened and the pump 6 is started to pump the washing water into the elevated tank III 3, and the washing water continues to be used as the second time of washing water of the next pot. And (3) connecting tap water to enter the centrifugal filter-throwing device 9, washing the second pot for the fourth time, opening the control valve VII 17 and starting the pump 6 after the washing is finished, and pumping the washing water into the head tank IV 4 to continue to be used as the third washing water of the next pot of mother liquor. And after the four times of material washing in the second pot are finished, taking out the 2-methyl-5-nitroimidazole, and finishing the material washing in the second pot.
The above steps are repeated in a circulating way, and the operations of synthesis, dilution, centrifugal filtration and material washing are carried out.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.
Claims (6)
1. The utility model provides a material washing device of 2-methyl-5-nitroimidazole which characterized in that: comprises a liquid containing pool (5), a head tank I (1), a pump (6) and a centrifugal filter device (9); the top of the centrifugal filter device (9) is provided with a water inlet pipe (7), the bottom of the centrifugal filter device is connected with the top of the liquid containing pool (5), and the left side of the centrifugal filter device is connected with a synthesis device (20); the water inlet pipe (7) is externally connected with a tap water supply pipeline; the bottom of the liquid containing pool (5) is respectively provided with a water outlet pipe (8); the pump (6) is connected with the water outlet pipe (8); the top of the elevated tank I (1) is connected with a pump (6), and the bottom of the elevated tank I is connected with a synthesis device (20); and the first washing water is pumped into the head tank I (1) by the pump (6) and is used as dilution water for synthesizing 2-methyl-5-nitroimidazole in the next pot in the synthesis device (20).
2. The washing device of 2-methyl-5-nitroimidazole according to claim 1, characterized in that: the high-level tank I (1) is provided with a control valve I (11) on a connecting pipeline with the pump (6), and the high-level tank I is provided with a control valve II (12) on a connecting pipeline with the synthesis device (20).
3. The apparatus for washing 2-methyl-5-nitroimidazole according to claim 1, characterized in that: the device also comprises a high-level groove II (2), a high-level groove III (3) and a high-level groove IV (4); the elevated tank II (2), the elevated tank III (3) and the elevated tank IV (4) are connected in parallel, the top parts of the elevated tanks are connected with a pump (6), and the bottom parts of the elevated tanks are connected with a water inlet pipe (7); pumping the second washing water into the elevated tank II (2) by a pump (6) for the first washing of the next pot in the centrifugal filter device (9); pumping the third washing water into the head tank III (3) by a pump (6) for second washing of the next pot in the centrifugal filter device (9); the fourth washing water is pumped into the elevated tank IV (4) by the pump (6) and is used for the third washing of the next pot in the centrifugal filter device (9).
4. The apparatus for washing 2-methyl-5-nitroimidazole according to claim 3, characterized in that: a control valve III (13) is arranged on a connecting pipeline between the elevated tank II (2) and the pump (6), and a control valve IV (14) is arranged on a connecting pipeline between the elevated tank II and the water inlet pipe (7); a control valve V (15) is arranged on a connecting pipeline between the elevated tank III (3) and the pump (6), and a control valve VI (16) is arranged on a connecting pipeline between the elevated tank III and the water inlet pipe (7); and a control valve VII (17) is arranged on a connecting pipeline between the elevated tank IV (4) and the pump (6), and a control valve VIII (18) is arranged on a connecting pipeline between the elevated tank IV and the water inlet pipe (7).
5. The apparatus for washing 2-methyl-5-nitroimidazole according to claim 1, characterized in that: also comprises a mother liquor storage tank (21); the left side of the mother liquor storage tank (21) is connected with a pump (6), the pump (6) pumps the mother liquor subjected to centrifugal filtration into the mother liquor storage tank (21), and the mother liquor is concentrated to obtain ammonium sulfate which is used for feeding in the acidification process of producing 2-methyl-5-nitroimidazole; and a control valve IX (19) is arranged on a connecting pipeline between the mother liquor storage tank (21) and the suction pump (6).
6. The apparatus for washing 2-methyl-5-nitroimidazole according to claim 1, characterized in that: the water inlet pipe (7) is provided with a flowmeter (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221025371.1U CN217191292U (en) | 2022-04-29 | 2022-04-29 | Material washing device for 2-methyl-5-nitroimidazole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221025371.1U CN217191292U (en) | 2022-04-29 | 2022-04-29 | Material washing device for 2-methyl-5-nitroimidazole |
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| CN217191292U true CN217191292U (en) | 2022-08-16 |
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| CN202221025371.1U Active CN217191292U (en) | 2022-04-29 | 2022-04-29 | Material washing device for 2-methyl-5-nitroimidazole |
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| CN (1) | CN217191292U (en) |
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