CN215294853U - Epoxypropane workshop steam cyclic utilization device - Google Patents
Epoxypropane workshop steam cyclic utilization device Download PDFInfo
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- CN215294853U CN215294853U CN202121389265.7U CN202121389265U CN215294853U CN 215294853 U CN215294853 U CN 215294853U CN 202121389265 U CN202121389265 U CN 202121389265U CN 215294853 U CN215294853 U CN 215294853U
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Abstract
The utility model relates to the field of chemical industry, and discloses a propylene oxide workshop steam recycling device, which comprises a wastewater evaporation tower, a transfer pump, a concentrated solution storage tank, a heat exchanger, a thermoelectric boiler, a pipeline and a valve; the waste water evaporation tower comprises a first waste water evaporation tower, a second waste water evaporation tower, a third waste water evaporation tower and a fourth waste water evaporation tower, a heating layer is arranged at the lower part of the tower body, a packing layer is arranged at the upper part of the tower body, and the heating layer comprises a central circulation pipe and a boiling pipe. The utility model carries out four-gradient thermal coupling on high-temperature steam in the continuous wastewater evaporation treatment process, and sends the high-temperature steam into the thermoelectric boiler after heat exchange, so that the steam heat is fully and effectively utilized, the energy waste is avoided, and the energy-saving effect is obvious; by adopting the countercurrent filling of the wastewater, the temperature of the wastewater is gradually increased in the process of stably transferring heat from a low gradient to a high gradient in the steam thermal coupling, and the improvement of the wastewater treatment quality and efficiency is facilitated.
Description
Technical Field
The utility model relates to a chemical industry field, concretely relates to propylene oxide workshop steam cyclic utilization device.
Background
Propylene oxide is a very important organic compound starting material, second only to polypropylene and acrylonitrile, the third largest propylene-based derivative. At present, the world production methods of propylene oxide mainly comprise a chlorohydrin method, an ethylbenzene co-oxidation method and a hydrogen peroxide direct oxidation method. The chlorohydrin method and the ethylbenzene co-oxidation method have the disadvantages of high process pollution and high industrial water treatment cost, and are listed by the national development and improvement committee to forbid the use of new projects. The direct hydrogen peroxide oxidation method is characterized in that a titanium silicalite molecular sieve is used as a catalyst, methanol is used as a solvent, and propylene and hydrogen peroxide enter a catalyst bed layer in a liquid phase system to perform oxidation reaction under proper reaction conditions to produce propylene oxide and water; the process flow is relatively simple, no by-product is generated, the subsequent treatment equipment and facilities of the product are reduced, the whole production process basically has no pollution, and the process flow is a novel main production route of the future propylene oxide product. However, in the existing propylene oxide production, high-temperature steam is not effectively utilized, and great energy waste is caused. There is no description on how steam can be effectively used in some related patents, for example, the invention patent "method and apparatus for producing propylene oxide" with publication number CN107602510B, the utility model patent "an apparatus for producing propylene oxide" with publication number CN212293380U, and the like.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides an epoxypropane workshop steam cyclic utilization device.
The technical scheme is as follows: comprises a wastewater evaporation tower, a transfer pump, a concentrated solution storage tank, a heat exchanger, a thermoelectric boiler, a pipeline and a valve; the waste water evaporation tower comprises a first waste water evaporation tower, a second waste water evaporation tower, a third waste water evaporation tower and a fourth waste water evaporation tower; the first wastewater evaporation tower, the second wastewater evaporation tower, the third wastewater evaporation tower and the fourth wastewater evaporation tower have the same structure, the lower part of the tower body is provided with a heating layer, the upper part of the tower body is provided with a packing layer, the tower wall positioned on the heating layer is provided with a steam inlet, the tower wall positioned above the packing layer is provided with a wastewater inlet, the tower top is provided with a steam outlet, and the tower bottom is provided with a wastewater outlet; the heating layer consists of vertical pipes, and each vertical pipe comprises a large-diameter central circulating pipe and a plurality of small-diameter boiling pipes uniformly distributed around the central circulating pipe; the transfer pump comprises a first wastewater transfer pump, a second wastewater transfer pump, a third wastewater transfer pump and a condensate transfer pump; the valves comprise a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve; the pipelines comprise a steam thermal coupling pipeline, a condensate transfer pipeline and a wastewater transfer pipeline; the vapor thermal coupling lines comprise a first thermal coupling line, a second thermal coupling line, a third thermal coupling line, and a fourth thermal coupling line; the head end of the first thermal coupling pipeline is connected with a steam outlet of the first wastewater evaporation tower, the tail end of the first thermal coupling pipeline is connected with a steam inlet of the second wastewater evaporation tower, and a first valve is arranged on the pipeline; the head end of the second thermal coupling pipeline is connected with a steam outlet of the second wastewater evaporation tower, the tail end of the second thermal coupling pipeline is connected with a steam inlet of the third wastewater evaporation tower, and a second valve is arranged on the pipeline; the head end of the third thermal coupling pipeline is connected with a steam outlet of a third waste water evaporation tower, the tail end of the third thermal coupling pipeline is connected with a steam inlet of a fourth waste water evaporation tower, and a third valve is arranged on the pipeline; the head end of the fourth thermal coupling pipeline is connected with a steam outlet of the fourth wastewater evaporation tower, the tail end of the fourth thermal coupling pipeline is connected with a heat exchanger, and a fourth valve is arranged on the pipeline; the head end of the condensate transfer pipeline is connected with the heat exchanger, the tail end of the condensate transfer pipeline is connected with the thermoelectric boiler, and a fifth valve and a condensate transfer pump are sequentially arranged on the pipeline; the wastewater transport pipelines comprise a first wastewater transport pipeline, a second wastewater transport pipeline, a third wastewater transport pipeline and a fourth wastewater transport pipeline; the head end of the first wastewater transfer pipeline is connected with a wastewater outlet of the fourth wastewater evaporation tower, the tail end of the first wastewater transfer pipeline is connected with a wastewater inlet of the third wastewater evaporation tower, and a sixth valve and a first wastewater transfer pump are sequentially arranged on the pipeline; the head end of the second wastewater transfer pipeline is connected with a wastewater outlet of the third wastewater evaporation tower, the tail end of the second wastewater transfer pipeline is connected with a wastewater inlet of the second wastewater evaporation tower, and a seventh valve and a second wastewater transfer pump are sequentially arranged on the pipeline; the head end of the third waste water transfer pipeline is connected with a waste water outlet of the second waste water evaporation tower, the tail end of the third waste water transfer pipeline is connected with a waste water inlet of the first waste water evaporation tower, and an eighth valve and a third waste water transfer pump are sequentially arranged on the pipeline; the head end of the fourth wastewater transfer pipeline is connected with a wastewater outlet of the first wastewater evaporation tower, the tail end of the fourth wastewater transfer pipeline is connected with a concentrated solution storage tank, and a ninth valve is installed on the pipeline.
The sectional area of the central circulating pipe is 50% of the total sectional area of the boiling pipe.
The diameter of the boiling pipe is 30-60 mm.
The filler layer adopts corrugated filler.
The first wastewater transfer pump, the second wastewater transfer pump, the third wastewater transfer pump and the condensate transfer pump all adopt centrifugal pumps.
The overflowing component of the centrifugal pump is made of fluoroplastic.
The pipeline and the valve are made of stainless steel.
The heat exchanger is provided with a noncondensable gas discharge port.
Compared with the prior art, the utility model discloses a main beneficial technological effect as follows:
1. high-temperature steam is subjected to four-gradient thermal coupling in the continuous wastewater evaporation treatment process and is sent into the thermoelectric boiler after heat exchange, so that the steam heat is fully and effectively utilized, the energy waste is avoided, and the energy-saving effect is remarkable.
2. By adopting the countercurrent filling of the wastewater, the temperature of the wastewater is gradually increased in the process of stably transferring heat from a low gradient to a high gradient in the steam thermal coupling, and the improvement of the wastewater treatment quality and efficiency is facilitated.
3. Simple structure, convenient operation and durability.
Drawings
FIG. 1 is a schematic view of the structure layout and basic flow of the present invention;
in the figure: 1-a first wastewater evaporation tower, 2-a steam inlet, 3-a packing layer, 4-a steam outlet, 5-a first valve, 6-a first thermal coupling pipeline, 7-a second valve, 8-a second thermal coupling pipeline, 9-a third valve, 10-a third thermal coupling pipeline, 11-a fourth valve, 12-a wastewater inlet, 13-a second wastewater evaporation tower, 14-a third wastewater evaporation tower, 15-a fourth wastewater evaporation tower, 16-a boiling pipe, 17-a central circulation pipe, 18-a wastewater outlet, 19-a ninth valve, 20-an eighth valve, 21-a seventh valve, 22-a sixth valve, 23-a fourth thermal coupling pipeline, 24-a non-condensable gas discharge port, 25-a fourth wastewater transfer pipeline, 26-a concentrated liquid storage tank, 27-a third waste water transfer pump, 28-a third waste water transfer pipeline, 29-a second waste water transfer pump, 30-a second waste water transfer pipeline, 31-a first waste water transfer pump, 32-the first waste water transfer pipeline, 33-a heat exchanger, 34-a fifth valve, 35-a condensate transfer pipeline, 36-a condensate transfer pump and 37-a thermoelectric boiler.
Detailed Description
The present invention will be described in detail below with reference to the following examples and the accompanying drawings.
Example 1
See fig. 1. Propylene oxide workshop steam cyclic utilization device includes waste water evaporation tower, transfer pump, concentrate storage tank 26, heat exchanger 33, thermoelectric boiler 37, pipeline and valve. The waste water evaporation tower comprises a first waste water evaporation tower 1, a second waste water evaporation tower 13, a third waste water evaporation tower 14 and a fourth waste water evaporation tower 15. The first wastewater evaporation tower 1, the second wastewater evaporation tower 13, the third wastewater evaporation tower 14 and the fourth wastewater evaporation tower 15 are identical in structure, a heating layer is arranged on the lower portion of the tower body, a packing layer 3 is arranged on the upper portion of the tower body, a steam inlet 2 is arranged on the tower wall located on the heating layer, a wastewater inlet 12 is arranged on the tower wall located above the packing layer 3, a steam outlet 4 is arranged on the tower top, and a wastewater outlet 18 is arranged on the tower bottom. The heating layer consists of a vertical pipe which comprises a central circulation pipe 17 with a large diameter and a plurality of boiling pipes 16 with a small diameter which are uniformly distributed around the central circulation pipe. The transfer pump comprises a first wastewater transfer pump 31, a second wastewater transfer pump 29, a third wastewater transfer pump 27 and a condensate transfer pump 36. The valves include a first valve 5, a second valve 7, a third valve 9, a fourth valve 11, a fifth valve 34, a sixth valve 22, a seventh valve 21, an eighth valve 20, and a ninth valve 19. The pipelines include a steam thermal coupling pipeline, a condensate transfer pipeline 35 and a wastewater transfer pipeline. The vapor thermal coupling lines include a first thermal coupling line 6, a second thermal coupling line 8, a third thermal coupling line 10, and a fourth thermal coupling line 23. The head end of the first thermal coupling pipeline 6 is connected with the steam outlet 4 of the first wastewater evaporation tower 1, the tail end is connected with the steam inlet 2 of the second wastewater evaporation tower 13, and the pipeline is provided with a first valve 5. The head end of the second thermal coupling pipeline 8 is connected with the steam outlet 4 of the second wastewater evaporation tower 13, the tail end is connected with the steam inlet 2 of the third wastewater evaporation tower 14, and the pipeline is provided with a second valve 7. The head end of the third thermal coupling pipeline 10 is connected with the steam outlet 4 of the third waste water evaporation tower 14, the tail end of the third thermal coupling pipeline is connected with the steam inlet 2 of the fourth waste water evaporation tower 15, and a third valve 9 is arranged on the pipeline. The head end of the fourth thermal coupling pipeline 23 is connected with the steam outlet 4 of the fourth wastewater evaporation tower 15, the tail end is connected with the heat exchanger 33, and the pipeline is provided with a fourth valve 11. The head end of the condensate transfer pipeline 35 is connected with the heat exchanger 33, the tail end of the condensate transfer pipeline is connected with the thermoelectric boiler 37, and the fifth valve 34 and the condensate transfer pump 36 are sequentially arranged on the pipeline. The wastewater transport lines include a first wastewater transport line 32, a second wastewater transport line 30, a third wastewater transport line 28, and a fourth wastewater transport line 25. The head end of the first wastewater transfer pipeline 32 is connected with the wastewater outlet 18 of the fourth wastewater evaporation tower 15, the tail end is connected with the wastewater inlet 12 of the third wastewater evaporation tower 14, and the pipeline is sequentially provided with the sixth valve 22 and the first wastewater transfer pump 31. The head end of the second waste water transfer pipeline 30 is connected with the waste water outlet 18 of the third waste water evaporation tower 14, the tail end is connected with the waste water inlet 12 of the second waste water evaporation tower 13, and a seventh valve 21 and a second waste water transfer pump 29 are sequentially arranged on the pipeline. The head end of the third waste water transfer pipeline 28 is connected with the waste water outlet 18 of the second waste water evaporation tower 13, the tail end is connected with the waste water inlet 12 of the first waste water evaporation tower 1, and an eighth valve 20 and a third waste water transfer pump 27 are sequentially arranged on the pipeline. The head end of the fourth wastewater transfer pipeline 25 is connected with the wastewater outlet 18 of the first wastewater evaporation tower 1, the tail end is connected with the concentrated solution storage tank 26, and the pipeline is provided with a ninth valve 19.
Example 2
See fig. 1. The propylene oxide workshop steam recycling device is characterized in that on the basis of the technical scheme described in embodiment 1, the sectional area of a central circulating pipe 17 is 50% of the total sectional area of a boiling pipe 16; the diameter of the boiling tubes 16 is in the range of 30-60mm to ensure that the waste water is heated sufficiently and uniformly by the steam to evaporate.
Example 3
See fig. 1. According to the propylene oxide workshop steam recycling device, on the basis of the technical scheme recorded in the embodiment 1, the packing layer 3 is corrugated packing and has the advantages of small resistance, light capacity, high strength, flame retardance, corrosion resistance and the like.
Example 4
See fig. 1. A propylene oxide plant steam recycling device is characterized in that on the basis of the technical scheme recorded in embodiment 1, a first wastewater transfer pump 31, a second wastewater transfer pump 29, a third wastewater transfer pump 27 and a condensate transfer pump 36 are centrifugal pumps with compact structures and low cost; the overflowing parts of the centrifugal pump are made of fluoroplastic to enhance the anti-corrosion capability.
Example 5
See fig. 1. According to the propylene oxide workshop steam recycling device, on the basis of the technical scheme recorded in the embodiment 1, pipelines and valves are made of stainless steel materials, so that the corrosion resistance of the propylene oxide workshop is enhanced, and the service life of the propylene oxide workshop is prolonged.
Example 6
See fig. 1. According to the steam recycling device for the propylene oxide plant, on the basis of the technical scheme described in embodiment 1, the heat exchanger 33 is provided with the non-condensable gas discharge port 24 to discharge non-condensable gas, so that the heat transfer effect is enhanced.
The basic working principle of the utility model is as follows:
high-temperature saturated steam of about 200-220 ℃ in a propylene oxide plant firstly enters a heating layer from a steam inlet 2 of a first wastewater evaporation tower 1 as primary steam, wastewater entering the first wastewater evaporation tower 1 is heated and evaporated, generated secondary steam is discharged from a steam outlet 4 of the first wastewater evaporation tower 1 and is conveyed to a steam inlet 2 of a second wastewater evaporation tower 13 through a first thermal coupling pipeline 6 to enter the heating layer, the wastewater entering the second wastewater evaporation tower 13 is heated and evaporated, the generated secondary steam is discharged from a steam outlet 4 of the second wastewater evaporation tower 13 and is conveyed to a steam inlet 2 of a third wastewater evaporation tower 14 through a second thermal coupling pipeline 8 to enter the three-waste heating layer, the wastewater entering the third wastewater evaporation tower 14 is heated and evaporated, and the generated secondary steam is conveyed to a steam inlet 2 of a fourth wastewater evaporation tower 15 through a third thermal coupling pipeline 10 to enter the heating layer, the generated secondary steam is conveyed to a heat exchanger 33 by a fourth thermal coupling pipeline 23 for heat exchange, the non-condensable gas in the secondary steam is discharged through a non-condensable gas discharge port 24 and enters a subsequent treatment procedure, and the condensate with the waste heat of about 80-90 ℃ is conveyed to a thermoelectric boiler 37 for reutilization through a condensate transfer pump 36; relative to the transmission direction of steam among the four wastewater evaporation towers, the wastewater to be treated adopts a relative countercurrent filling mode, namely, the waste water enters from a waste water inlet 12 of a fourth waste water evaporation tower 15 with lower temperature, the waste water flows downwards, the waste water is fully transferred with the rising steam in the packing layer 3 to be evaporated, the residual waste water continuously flows downwards, heated and evaporated in the heating layer, especially in the boiling pipe 16, the residual wastewater is transported to the third wastewater evaporation tower 14 through a first wastewater transport pump 31 on a first wastewater transport pipeline 32, then the wastewater is transferred to the second wastewater evaporation tower 13 through the second wastewater transfer pump 29 on the second wastewater transfer pipeline 30 and transferred to the first wastewater evaporation tower 1 through the third wastewater transfer pump 27 on the third wastewater transfer pipeline 28, after the wastewater is sequentially evaporated by the four wastewater evaporation towers, the concentrate flows from the first wastewater evaporation tower 1 to the concentrate storage tank 26 through the fourth wastewater transfer line 25 for subsequent treatment.
Claims (8)
1. Epoxypropane workshop steam cyclic utilization device, its characterized in that: comprises a wastewater evaporation tower, a transfer pump, a concentrated solution storage tank, a heat exchanger, a thermoelectric boiler, a pipeline and a valve; the waste water evaporation tower comprises a first waste water evaporation tower, a second waste water evaporation tower, a third waste water evaporation tower and a fourth waste water evaporation tower; the first wastewater evaporation tower, the second wastewater evaporation tower, the third wastewater evaporation tower and the fourth wastewater evaporation tower have the same structure, the lower part of the tower body is provided with a heating layer, the upper part of the tower body is provided with a packing layer, the tower wall positioned on the heating layer is provided with a steam inlet, the tower wall positioned above the packing layer is provided with a wastewater inlet, the tower top is provided with a steam outlet, and the tower bottom is provided with a wastewater outlet; the heating layer consists of vertical pipes, and each vertical pipe comprises a large-diameter central circulating pipe and a plurality of small-diameter boiling pipes uniformly distributed around the central circulating pipe; the transfer pump comprises a first wastewater transfer pump, a second wastewater transfer pump, a third wastewater transfer pump and a condensate transfer pump; the valves comprise a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve; the pipelines comprise a steam thermal coupling pipeline, a condensate transfer pipeline and a wastewater transfer pipeline; the vapor thermal coupling lines comprise a first thermal coupling line, a second thermal coupling line, a third thermal coupling line, and a fourth thermal coupling line; the head end of the first thermal coupling pipeline is connected with a steam outlet of the first wastewater evaporation tower, the tail end of the first thermal coupling pipeline is connected with a steam inlet of the second wastewater evaporation tower, and a first valve is arranged on the pipeline; the head end of the second thermal coupling pipeline is connected with a steam outlet of the second wastewater evaporation tower, the tail end of the second thermal coupling pipeline is connected with a steam inlet of the third wastewater evaporation tower, and a second valve is arranged on the pipeline; the head end of the third thermal coupling pipeline is connected with a steam outlet of a third waste water evaporation tower, the tail end of the third thermal coupling pipeline is connected with a steam inlet of a fourth waste water evaporation tower, and a third valve is arranged on the pipeline; the head end of the fourth thermal coupling pipeline is connected with a steam outlet of the fourth wastewater evaporation tower, the tail end of the fourth thermal coupling pipeline is connected with a heat exchanger, and a fourth valve is arranged on the pipeline; the head end of the condensate transfer pipeline is connected with the heat exchanger, the tail end of the condensate transfer pipeline is connected with the thermoelectric boiler, and a fifth valve and a condensate transfer pump are sequentially arranged on the pipeline; the wastewater transport pipelines comprise a first wastewater transport pipeline, a second wastewater transport pipeline, a third wastewater transport pipeline and a fourth wastewater transport pipeline; the head end of the first wastewater transfer pipeline is connected with a wastewater outlet of the fourth wastewater evaporation tower, the tail end of the first wastewater transfer pipeline is connected with a wastewater inlet of the third wastewater evaporation tower, and a sixth valve and a first wastewater transfer pump are sequentially arranged on the pipeline; the head end of the second wastewater transfer pipeline is connected with a wastewater outlet of the third wastewater evaporation tower, the tail end of the second wastewater transfer pipeline is connected with a wastewater inlet of the second wastewater evaporation tower, and a seventh valve and a second wastewater transfer pump are sequentially arranged on the pipeline; the head end of the third waste water transfer pipeline is connected with a waste water outlet of the second waste water evaporation tower, the tail end of the third waste water transfer pipeline is connected with a waste water inlet of the first waste water evaporation tower, and an eighth valve and a third waste water transfer pump are sequentially arranged on the pipeline; the head end of the fourth wastewater transfer pipeline is connected with a wastewater outlet of the first wastewater evaporation tower, the tail end of the fourth wastewater transfer pipeline is connected with a concentrated solution storage tank, and a ninth valve is installed on the pipeline.
2. The propylene oxide plant steam recycling unit of claim 1, characterized in that: the sectional area of the central circulating pipe is 50% of the total sectional area of the boiling pipe.
3. The propylene oxide plant steam recycling unit of claim 1, characterized in that: the diameter of the boiling pipe is 30-60 mm.
4. The propylene oxide plant steam recycling unit of claim 1, characterized in that: the filler layer adopts corrugated filler.
5. The propylene oxide plant steam recycling unit of claim 1, characterized in that: the first wastewater transfer pump, the second wastewater transfer pump, the third wastewater transfer pump and the condensate transfer pump all adopt centrifugal pumps.
6. The propylene oxide plant steam recycling unit of claim 5, wherein: the overflowing component of the centrifugal pump is made of fluoroplastic.
7. The propylene oxide plant steam recycling unit of claim 1, characterized in that: the pipeline and the valve are made of stainless steel.
8. The propylene oxide plant steam recycling unit of claim 1, characterized in that: the heat exchanger is provided with a noncondensable gas discharge port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121389265.7U CN215294853U (en) | 2021-06-22 | 2021-06-22 | Epoxypropane workshop steam cyclic utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121389265.7U CN215294853U (en) | 2021-06-22 | 2021-06-22 | Epoxypropane workshop steam cyclic utilization device |
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| CN215294853U true CN215294853U (en) | 2021-12-24 |
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| CN202121389265.7U Active CN215294853U (en) | 2021-06-22 | 2021-06-22 | Epoxypropane workshop steam cyclic utilization device |
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