CN2905175Y - Energy-saving urea process condensate purifying and reclaiming unit - Google Patents
Energy-saving urea process condensate purifying and reclaiming unit Download PDFInfo
- Publication number
- CN2905175Y CN2905175Y CN 200620084447 CN200620084447U CN2905175Y CN 2905175 Y CN2905175 Y CN 2905175Y CN 200620084447 CN200620084447 CN 200620084447 CN 200620084447 U CN200620084447 U CN 200620084447U CN 2905175 Y CN2905175 Y CN 2905175Y
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- hydrolysis tower
- heat exchanger
- pipeline
- tower
- saving
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Abstract
The utility model provides a urea process condensing energy-saving purifying and recovering device, comprising material feeding device which connects a 1st heat exchanger through pipelines; the 1st heat exchanger connects a 2nd heat exchanger through pipelines; the 2nd heat exchanger connects the middle section of a hydrolysis tower through pipelines and connects the bottom end of the hydrolysis tower through pipelines; the middle section of the hydrolysis tower connects the top of 3rd heat exchanger through pipelines; the bottom end of the hydrolysis tower connects the bottom of the 3rd heat exchanger through pipelines; the hydrolysis tower connects a gas mixing device through pipelines, the 3rd heat exchanger connects the bottom of the gas mixing device; upper section of the hydrolysis tower connects a recovery groove through pipelines, the recovery groove connects a condenser on the top of the tower through pipelines; the condenser on the top of the tower connects a return groove which connects a return pump; the return pump connects the upper section of the hydrolysis tower. The utility model can decrease consumption on large scale when reaching exhaust standard of national environmental protection requirement.
Description
Technical field
The utility model relates to effluent purifying device in the chemical products production, is a kind of condensed liquid in urea preparing process energy-saving and purifying retracting device.
Background technology
Condensed liquid in urea preparing process is to the heavy contamination of environment, so there is multiple design this area to the treating apparatus of condensed liquid in urea preparing process.Because existing various devices are under the prerequisite of the environmental protection standard that reaches national requirements, consume higherly, equipment manufacturing cost is higher, so be a kind of than white elephant for medium-sized and small enterprises.
Summary of the invention
The purpose of this utility model is, a kind of condensed liquid in urea preparing process energy-saving and purifying retracting device is provided, and it can reduce consumption etc. significantly when reaching the discharge standard of national requirements for environmental protection.
The utility model is achieved through the following technical solutions for achieving the above object: condensed liquid in urea preparing process energy-saving and purifying retracting device, comprise feed pump, feed pump is connected with first heat exchanger by pipeline, first heat exchanger is connected with second heat exchanger by pipeline, second heat exchanger is connected with the hydrolysis tower stage casing by pipeline, and be connected with the hydrolysis tower bottom by pipeline, the hydrolysis tower stage casing is connected with the 3rd heat exchanger top by pipeline, the hydrolysis tower bottom is connected with the 3rd heat exchanger bottom by pipeline, hydrolysis tower is connected with gas mixer by pipeline, the 3rd heat exchanger is connected with the gas mixer bottom, the hydrolysis tower epimere is connected with accumulator tank by pipeline, and accumulator tank is connected with overhead condenser by pipeline, and overhead condenser is connected with the backflow liquid bath, the backflow liquid bath is connected with reflux pump, and reflux pump is connected with the hydrolysis tower epimere.Bubble-cap in the hydrolysis tower on the tower tray is closed the connection with Steam Pipe, fixedlys connected with the top board of bubble-cap in the top of Steam Pipe, and the top of Steam Pipe is provided with opening, and the bottom of bubble-cap is connected with Steam Pipe.Gradient overflow down-flow plate is installed on the tower tray in the hydrolysis tower.Gradient overflow down-flow plate has riser and transverse slat, and riser vertically is connected with transverse slat, perforate on the transverse slat.The top of transverse slat is a waveform.Offer the strip hole on the circumferential wall of bubble-cap.Vapor distributor is installed in the hydrolysis tower bottom, and clog-free spiral nozzle is installed on the circulating line on the vapor distributor.The hydrolysis tower epimere is provided with ammonium fluid body pipe joint, below ammonium fluid body pipe joint the reflux pipeline interface is set, and the hydrolysis tower stage casing is provided with the first jet chimney interface and the second jet chimney interface, and section is provided with the 3rd jet chimney interface at the bottom of the hydrolysis tower.
Advantage of the present utility model is: having reached under the discharge standard prerequisite of national requirements for environmental protection, reduced consumption significantly, the unnecessary ammoniacal liquor of condensed liquid in urea preparing process and synthetic ammonia is handled together, process simplification, and the operation investment cost reduces; The 3rd heat exchanger that is provided with can improve steam utilization to greatest extent, make the high easily decomposition of temperature of charge in the hydrolysis tower, energy-saving effect is remarkable, the gradient overflow down-flow plate that in hydrolysis tower, increases, can make the liquid distribution gradient in the tower, prolonged the time of staying, thereby guaranteed that mass-and heat-transfer efficient, recovering effect are good; The totally enclosed type bubble-cap, it is good to have satisfied mass transfer effect, and operating flexibility is big, and gas phase revolution is the pressure drop minimum during by Steam Pipe, and kept good bubbling effect and tower tray debugging, do not overhaul after installing etc., require etc.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model; Accompanying drawing 2 is structural representations of hydrolysis tower 2 in the accompanying drawing 1; Accompanying drawing 3 is II portion structure for amplifying schematic diagrames in the accompanying drawing 2; Accompanying drawing 4 be in the accompanying drawing 3 B to enlarged diagram; Accompanying drawing 5 be in the accompanying drawing 3 A to enlarged diagram; Accompanying drawing 6 is I portion structure for amplifying schematic diagrames in the accompanying drawing 2; Accompanying drawing 7 be in the accompanying drawing 6 C to structural representation.
The specific embodiment
Condensed liquid in urea preparing process energy-saving and purifying retracting device of the present utility model, comprise feed pump 8, feed pump 8 is connected with first heat exchanger 5 by pipeline, first heat exchanger 5 is connected with second heat exchanger 4 by pipeline, second heat exchanger 4 is connected with hydrolysis tower 2 stage casings by pipeline, and be connected with hydrolysis tower 2 bottoms by pipeline, hydrolysis tower 2 stage casings are connected with the 3rd heat exchanger 3 tops by pipeline, hydrolysis tower 2 bottoms are connected with the 3rd heat exchanger 3 bottoms by pipeline, hydrolysis tower 2 is connected with gas mixer 1 by pipeline, the 3rd heat exchanger 3 is connected with gas mixer 1 bottom, hydrolysis tower 2 epimeres are connected with accumulator tank 6 by pipeline, and accumulator tank 6 is connected with overhead condenser 9 by pipeline, and overhead condenser 9 is connected with backflow liquid bath 10, backflow liquid bath 10 is connected with reflux pump 7, and reflux pump 7 is connected with hydrolysis tower 2 epimeres.Bubble-cap 27 in the hydrolysis tower 2 on the tower tray 26 is closed connections with Steam Pipe 28, fixedlys connected with the top board of bubble-cap 27 in the top of Steam Pipe 28, and the top of Steam Pipe 28 is provided with opening 18, and the bottom of bubble-cap 27 is connected with Steam Pipe 28.Gradient overflow down-flow plate 19 is installed on the tower tray 26 in the hydrolysis tower 2.Gradient overflow down-flow plate 19 has riser 20 and transverse slat 21, and riser 20 vertically is connected with transverse slat 21, perforate on the transverse slat 21.The top of transverse slat 21 is waveforms.Offer strip hole 29 on the circumferential wall of bubble-cap 27.Vapor distributor 23 is installed in hydrolysis tower 2 bottoms, and clog-free spiral nozzle 22 is installed on the circulating line on the vapor distributor 23.Hydrolysis tower 2 epimeres are provided with ammonium fluid body pipe joint 14, below ammonium fluid body pipe joint 14, reflux pipeline interface 15 is set, hydrolysis tower 2 stage casings are provided with the first jet chimney interface 16 and the second jet chimney interface 25, and 2 end of hydrolysis tower section is provided with the 3rd jet chimney interface 17.The first ammonium liquid that generates in the utility model device enters backflow liquid bath 10 again, send the heat energy utilization section to make phegma by reflux pump 7 pressurization backs one tunnel, uncooled gas is sent to urea plant by backflow liquid bath 10, the overhead condenser cooling water enters warm water cooler 13 after absorbing heat, recycles with warm water circulating pump 11 behind the employing urea cycle water for cooling.The steam of the utility model device middle steam tube is 1.3-1.8Mpa, the flow of steam is controlled by control valve, one the tunnel advance the 3rd heat exchanger 3 heat exchange of outside at the bottom of the tower after, through first heat exchanger 5 with directly add in the hydrolysis towers 2 after second heat exchanger 4 further improves steam utilizations from different positions, make full use of steam thermal energy and carry out mass-and heat-transfer, the CO that another road steam and carbon-dioxide gas compressor come
2Go into hydrolysis tower 2 bottoms through gas mixer 1 is laggard behind the gas regulation flow, to satisfy the needs of energy-saving and purifying.The utility model hydrolysis tower 2 top backflow additions can make ammonia absorb, and do not influence the purification recovering effect of process condensate and material, temperature balance simultaneously.The top absorption cell 6 that the utility model increases at hydrolysis tower 2 tops is made absorption liquid with tower item condensate liquid, progressively recovery section ammonia and CO
2, the mixed material that goes out absorption cell 6 enters cat head warm water condenser 13 and further reclaims ammonia, CO
2, adopt ammonium fluid to add the backflow of hydrolysis tower 2 tops simultaneously from the urea battery limit (BL), process condensate decomposes to increase, the effect of desorb.The utility model increases the method that the jet chimney interface adds steam in hydrolysis tower 2 stage casings, promptly save steam consumption, has played the effect of system pressure stable operation again.Device described in the utility model is with the urea in the not labile process condensate under traditional desorption condition, under higher temperature and suitable pressure, through hydrolysis, transform ammonification and carbon dioxide, the first ammonium liquid that ammonia, carbon dioxide and hydrolysis is generated through retracting device is recovered in the urea production and goes then.Raffinate after the desorb is up to standard.After purifying, reclaim to use, reached the purpose that not only reclaims urea but also reclaiming clean water.A represents that ammonium fluid is from the urea battery limit (BL) among Fig. 1, H represents that fixed gas removes urea plant, G represents that cooling water goes out-of-bounds, F represents that cooling water is from out-of-bounds, E represents process condensate from urea production, and D represents the reuse of purifying waste water, and C represents the steam source, B represents that the pressurized carbon dioxide indentation goes into mixing arrangement 1,12nd, the process condensate liquid bath.The 24th, clog-free spiral nozzle.The utility model not detailed description is known technology.
Claims (8)
1, condensed liquid in urea preparing process energy-saving and purifying retracting device, it is characterized in that: comprise feed pump (8), feed pump (8) is connected with first heat exchanger (5) by pipeline, first heat exchanger (5) is connected with second heat exchanger (4) by pipeline, second heat exchanger (4) is connected with hydrolysis tower (2) stage casing by pipeline, and be connected with hydrolysis tower (2) bottom by pipeline, hydrolysis tower (2) stage casing is connected with the 3rd heat exchanger (3) top by pipeline, hydrolysis tower (2) bottom is connected with the 3rd heat exchanger (3) bottom by pipeline, hydrolysis tower (2) is connected with gas mixer (1) by pipeline, the 3rd heat exchanger (3) is connected with gas mixer (1) bottom, hydrolysis tower (2) epimere is connected with accumulator tank (6) by pipeline, accumulator tank (6) is connected with overhead condenser (9) by pipeline, overhead condenser (9) is connected with backflow liquid bath (10), backflow liquid bath (10) is connected with reflux pump (7), and reflux pump (7) is connected with hydrolysis tower (2) epimere.
2, condensed liquid in urea preparing process energy-saving and purifying retracting device according to claim 1, it is characterized in that: the bubble-cap (27) in the hydrolysis tower (2) on the tower tray (26) is closed the connection with Steam Pipe (28), fixedly connected with the top board of bubble-cap (27) in the top of Steam Pipe (28), the top of Steam Pipe (28) is provided with opening (18), and the bottom of bubble-cap (27) is connected with Steam Pipe (28).
3, condensed liquid in urea preparing process energy-saving and purifying retracting device according to claim 1 and 2 is characterized in that: tower tray (26) is gone up gradient overflow down-flow plate (19) is installed in the hydrolysis tower (2).
4, condensed liquid in urea preparing process energy-saving and purifying retracting device according to claim 3 is characterized in that: gradient overflow down-flow plate (19) has riser (20) and transverse slat (21), and riser (20) vertically is connected with transverse slat (21), and transverse slat (21) is gone up perforate.
5, condensed liquid in urea preparing process energy-saving and purifying retracting device according to claim 4, it is characterized in that: the top of transverse slat (21) is a waveform.
6, condensed liquid in urea preparing process energy-saving and purifying retracting device according to claim 2 is characterized in that: offer strip hole (29) on the circumferential wall of bubble-cap (27).
7, according to claim 1 or 4 described condensed liquid in urea preparing process energy-saving and purifying retracting devices, it is characterized in that: vapor distributor (23) is installed in hydrolysis tower (2) bottom, and clog-free spiral nozzle (22) is installed on the circulating line on the vapor distributor (23).
8, condensed liquid in urea preparing process energy-saving and purifying retracting device according to claim 7, it is characterized in that: hydrolysis tower (2) epimere is provided with ammonium fluid body pipe joint (14), in ammonium fluid body pipe joint (14) below reflux pipeline interface (15) is set, hydrolysis tower (2) stage casing is provided with the first jet chimney interface (16) and the second jet chimney interface (25), and hydrolysis tower (2) end section is provided with the 3rd jet chimney interface (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620084447 CN2905175Y (en) | 2006-05-18 | 2006-05-18 | Energy-saving urea process condensate purifying and reclaiming unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620084447 CN2905175Y (en) | 2006-05-18 | 2006-05-18 | Energy-saving urea process condensate purifying and reclaiming unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2905175Y true CN2905175Y (en) | 2007-05-30 |
Family
ID=38113801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620084447 Expired - Lifetime CN2905175Y (en) | 2006-05-18 | 2006-05-18 | Energy-saving urea process condensate purifying and reclaiming unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2905175Y (en) |
-
2006
- 2006-05-18 CN CN 200620084447 patent/CN2905175Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070530 |
|
| EXPY | Termination of patent right or utility model |