CN202730092U - Energy-saving heating system of coking crude benzol storage tank - Google Patents
Energy-saving heating system of coking crude benzol storage tank Download PDFInfo
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- CN202730092U CN202730092U CN2012204245216U CN201220424521U CN202730092U CN 202730092 U CN202730092 U CN 202730092U CN 2012204245216 U CN2012204245216 U CN 2012204245216U CN 201220424521 U CN201220424521 U CN 201220424521U CN 202730092 U CN202730092 U CN 202730092U
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Abstract
The utility model belongs to the technical field of coke oven gas purification and relates to a heating system of a crude benzol storage tank. A hot wash oil outlet of a lean oil tank (2) is positioned at the bottom of the lean oil tank (2) and is connected to an inlet of a hot lean oil pump (15) through a pipeline provided with a valve, an outlet of the hot lean oil pump (15) is divided into two ways, one way is sequentially connected with a primary lean oil cooler (4) and a secondary lean oil cooler (5) through a wash oil pipe (3) to be connected to a wash oil pipe (6) of a benzene washing tower, the other way is connected to inlets of heaters (12) of at least one of a wash oil storage tank (13), a residue tank (10), a refined heavy benzole tank (8) or a naphthalene oil tank (9) in a coking crude benzol procedure through a hot wash oil supply pipe (14), an outlet of the heater (2) of each tank is connected to a reflux inlet of the lean oil tank (2) through a wash oil return pipe (11), and valves are arranged on the hot wash oil supply pipe (14). By the system, hot wash oil substitutes for steam to be used for heating and insulation of the storage tanks, a large amount of energy is saved, production cost is lowered, the temperature of the hot wash oil needing to be cooled is dropped to a certain degree, and energy consumption is reduced.
Description
Technical field
The utility model belongs to the coke oven gas purification technical field, relates to crude benzol storage tank heating system, specifically a kind of energy-saving coking crude benzene storage tank heating system.
Background technology
The coke-oven plant is in gas purification crude benzol production process, owing to adopt washing oil to the benzene in the coal gas, the organism such as toluene and naphthalene sprays absorption, absorbed benzene, being sent to debenzolizing tower after the organic washing oil such as methylbenzene and naphthalene (title rich oil) preheating takes off benzene and takes off the naphthalene processing, the washing oil (claiming oil-poor) that takes off behind the benzene flows automatically at the bottom of the debenzolizing tower, temperature is at 175-185 ℃, mode by gravity flow (or pump delivery) in poor oil-rich heat exchanger with wash the benzene rich oil that contains that the benzene tower comes and carry out thermal exchange, the rich oil temperature is elevated to 135-145 ℃, deliver to again diamond heating and after 180-185 ℃, enter debenzolizing tower, oil-poor drop in temperature is to 80-95 ℃, flow to hot oil-poor groove, then use hot oil-poor pump delivery to a section oil-poor water cooler (adopting 32-35 ℃ circulating water) to be cooled to 40-45 ℃, after two sections oil-poor water coolers (adopting 16-18 ℃ water at low temperature cooling) are cooled to 26-28 ℃, spray to washing benzene tower and coal gas again, absorb the benzene in the coal gas, the organism such as methylbenzene and naphthalene.
Carrying out the gas purification process, production wherein uses the raw material washing oil, because washing oil contains a certain amount of naphthalene, easy crystallization when temperature is lower than 40 ℃, blocking pipe, therefore present coke-oven plant adopts steam to heat and be incubated, keeps the washing oil temperature at 40-60 ℃, the flowability of assurance washing oil.Chemicals heavy benzol and the naphtalene oil produced simultaneously, carry out collection storage by storage tank, the process of storing, for guaranteeing the flowability of product, need to carry out heat tracing to storage tank, temperature is controlled at 60-80 ℃, and now the coke-oven plant adopts steam-heated mode that the storage tank medium is heated and be incubated, needs a large amount of steam of consumption.In the washing oil working cycle, in order to guarantee the washing oil quality, need to adopt revivifier that circulating washing oil is regenerated with superheated vapour, washing oil residue (high boiling material) after the regeneration enters the residue groove, after insulation is collected, sneak in the tar, in collection process, because when chance cold wash oil residue temperature was lower than 50 ℃, the washing oil residue can solidify hardening, stops up storage tank, pipeline and transferpump, cleaning is got up very difficult, the dismounting that often needs to stop work is cleared up, and therefore is to adopt steam-heated mode to make storage tank remain on 60-80 ℃ at present, keeps the washing oil residue to be in liquid flowing state.Owing to adopt the storage tank in steam heating insulation crude benzol zone, need to consume a large amount of steam, calculate to produce 1100000 tons of supporting crude benzol systems of coke per year, the quantity of steam that only consumes for crude benzol storage tank heat tracing is 2.5t/h, and the quantity of steam that consumes per month reaches 1800t.
" application of thermal oil technology in the coking ammonia still process " that the 20th phase Yuan Qiu China in 2011 delivers " the scientific and technological information exploitation is with economical " is described to coke-oven gas and heats thermal oil, heat-conducting oil heating to 250 ℃, remove to heat a part of distilled ammonia wastewater with 250 ℃ thermal oils, make a part of distilled ammonia wastewater become saturation steam and enter ammonia still, replace open steam to be used for ammonia still process, this technique is to have utilized the self-produced coal gas in coke-oven plant as the energy, the heating thermal oil, again by the heat-conducting oil heating distilled ammonia wastewater, thereby produce a kind of mode of steam, this technique mainly is in order to have reduced the efflux wastewater amount of ammonia still process, wherein the heat-conducting oil heating process also needs to consume a large amount of coal gas, need simultaneously to establish special heating unit, running cost and front-end investment are larger.
The utility model content
Technical problem to be solved in the utility model is, overcome the shortcoming of prior art, a kind of energy-saving coking crude benzene storage tank heating system is provided, reach and utilize the coking system waste heat to carry out the purpose of crude benzol operation storage tank heat tracing, finish heat integration, save mass energy, reduce production costs.
The technical scheme that the utility model solves above technical problem is:
Energy-saving coking crude benzene storage tank heating system comprises oil-poor groove, one section oil-poor water cooler and two sections oil-poor water coolers, and the hot washing oil import that oil-poor groove has connects debenzolizing tower to the hot washing oil pipe of oil-poor groove; The hot washing oil outlet that is positioned at its bottom that oil-poor groove has is connected to the import of an oil-poor pump of heat by establishing valvular pipeline, the oil-poor pump outlet of heat is divided into two-way, the washing oil pipe of leading up to is connected to the washing oil pipe of washing the benzene tower after connecting successively one section oil-poor water cooler and two sections oil-poor water coolers, another road is connected to the washing oil storage tank that the coking crude benzene operation has by hot washing oil oil feed pipe, the residue groove, the well heater import of at least one groove in refined heavy benzole groove or the naphtalene oil groove, the outlet of each groove well heater is connected to the backflow import of oil-poor groove by the washing oil used oil pipe, and hot washing oil oil feed pipe is provided with valve.
Like this, mainly be to utilize the existing hot washing oil of coking (temperature is at 80-95 ℃) as heating medium, connecing one road pipeline from the oil-poor pump discharge of heat is connected with the well heater of crude benzol storage tank, make hot washing oil by the material indirect heat exchange in sump heater and the groove, after being cooled to 60-70 ℃, hot washing oil temperature is back to oil-poor groove, material in the storage tank is heated to 60-70 ℃ by hot washing oil simultaneously, reach the purpose that residual heat integrative utilizes, simple to operate, being heated temperature of charge controls easily, take full advantage of the waste heat of existing hot washing oil, adopt hot washing oil to replace steam to be used for the storage tank heating, mass energy is saved in insulation, reduces production costs, the hot washing oil that needs simultaneously to cool off obtains temperature drop to a certain degree, reduces energy consumption.
The technical scheme that the utility model further limits is:
Aforesaid energy-saving coking crude benzene storage tank heating system, the connecting tube between one section oil-poor water cooler and the two sections oil-poor water coolers, and to the washing oil pipe of washing the benzene tower, all be provided with valve.
Aforesaid energy-saving coking crude benzene storage tank heating system, hot washing oil oil feed pipe is connected to the import of each groove well heater by each oil-feed arm, the outlet of each groove well heater is connected to the washing oil used oil pipe by respectively going out oil inlet pipe, and each oil-feed arm reaches respectively to go out all to be provided with valve on the oil inlet pipe.Control enters the hot washing oil flow of each storage tank, controls simultaneously the temperature of medium in the storage tank by regulating hot washing oil flow.
Aforesaid energy-saving coking crude benzene storage tank heating system all is provided with thermometer on washing oil storage tank, residue groove, refined heavy benzole groove and the naphtalene oil groove.
Aforesaid energy-saving coking crude benzene storage tank heating system, the backflow import is arranged on the top of described oil-poor groove.
The beneficial effects of the utility model are: the utility model is by utilizing coke-oven plant's hot washing oil of crude benzol operation as thermal source, replace original steam to come the storage tank of crude benzol is heated as heat source, the thermal medium source easily on the one hand, do not need cost, and do not need to increase special equipment, running cost is low; Simple to operate on the other hand, do not need too much manual shift, and medium temperature is controlled basic demand at 60-80 ℃ in the storage tank, and heat source temperature is higher 15 ℃ than storage tank temperature of charge, the storage tank material can not occur and be heated too high phenomenon by the medium temperature of this heating system heating is stable, temperature-stable is easily controlled.
The utility model utilizes the hot washing oil of crude benzol operation as thermal source, saves a large amount of energy, reduces production costs; The thermal medium source easily, does not need cost, and does not need to increase special equipment, and running cost is low; Simple to operate, do not need too much manual shift, and also stable by the medium temperature of this heating system heating, wave phenomenon does not appear; Because the crude benzol storage tank all is the insulation form, medium temperature control requires at 60-80 ℃ in the groove, and heat source temperature is higher 15 ℃ than storage tank temperature of charge, the storage tank material can not occur to be heated too high phenomenon, is convenient to temperature control; After adopting hot washing oil as thermal source, reduce the use of a large amount of steam, save production cost; Running cost is low, only needs the power consumption of the 3-5% of increase transferpump total power, compares and adopts steam heating saving cost to surpass 80%; Save the consumption of crude benzol operation water coolant, reduce water consumption.
Description of drawings
Fig. 1 is equipment connection synoptic diagram of the present utility model.
Embodiment
Embodiment 1
Present embodiment provides a kind of energy-saving coking crude benzene storage tank heating system, and equipment connection comprises oil-poor groove 2, one section oil-poor water cooler 4 and two sections oil-poor water coolers 5 as shown in Figure 1, and the hot washing oil import that oil-poor groove 2 has connects debenzolizing tower to the hot washing oil pipe 1 of oil-poor groove; The hot washing oil outlet that is positioned at its bottom that oil-poor groove 2 has is connected to the import of an oil-poor pump 15 of heat by establishing valvular pipeline, the outlet of the oil-poor pump 15 of heat is divided into two-way, the washing oil pipe 3 of leading up to is connected to the washing oil pipe 6 of washing the benzene tower after connecting successively one section oil-poor water cooler 4 and two sections oil-poor water coolers 5, another road is connected to the washing oil storage tank 13 that the coking crude benzene operation has by hot washing oil oil feed pipe 14, residue groove 10, well heater 12 imports of at least one groove in refined heavy benzole groove 8 or the naphtalene oil groove 9, the outlet of each groove well heater 12 is connected to the backflow import of oil-poor groove 2 by washing oil used oil pipe 11, the backflow import is arranged on the top of described oil-poor groove 2, and hot washing oil oil feed pipe 14 is provided with valve.Connecting tube between one section oil-poor water cooler 4 and the two sections oil-poor water coolers 5, and to the washing oil pipe 6 of washing the benzene tower, all be provided with valve.Hot washing oil oil feed pipe 14 is connected to the import of each groove well heater 12 by each oil-feed arm, the outlet of each groove well heater 12 is connected to washing oil used oil pipe 11 by respectively going out oil inlet pipe, each oil-feed arm reaches respectively to go out all to be provided with valve on the oil inlet pipe, control enters the hot washing oil flow of each storage tank, controls simultaneously the temperature of medium in the storage tank by regulating hot washing oil flow.All be provided with thermometer on washing oil storage tank 13, residue groove 10, refined heavy benzole groove 8 and the naphtalene oil groove 9.
Connect one road pipeline needs heating to the crude benzol zone sump heater inlet pipeline by pipeline from oil-poor pump discharge, oil-poor pump discharge pipe is connected with the well heater inlet pipeline of each storage tank.Recycle existing oil-poor pump as power, the washing oil of oil-poor pump delivery to oil-poor water cooler is divided into two, draw the hot washing oil of the 10-15% that accounts for the global cycle amount to the crude benzol sump heater, wherein major part proceeds to enter after the cooling of oil-poor water cooler and washes the benzene tower and carry out coal gas and wash benzene.Utilize temperature to replace steam as heating medium for 80-95 ℃ hot washing oil, the storage tank in crude benzol zone is heated, is incubated.In order to control the temperature of storage tank, and entering mounted valve on the arm of each storage tank, be convenient to control to the hot washing oil flow of storage tank heating, at last the outlet conduit of each well heater is connected to a total pipeline and takes back oil-poor groove, make hot washing oil return oil-poor groove by oil-poor after being pumped into the sump heater heat exchange from oil-poor groove, form the circulation of a heating system.In order to monitor the temperature of medium in the storage tank, on each storage tank, all be provided with thermometer.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (5)
1. an energy-saving coking crude benzene storage tank heating system comprises oil-poor groove (2), one section oil-poor water cooler (4) and two sections oil-poor water coolers (5), and the hot washing oil import that described oil-poor groove (2) has connects debenzolizing tower to the hot washing oil pipe (1) of oil-poor groove; It is characterized in that: the hot washing oil outlet that is positioned at its bottom that described oil-poor groove (2) has is connected to the import of an oil-poor pump of heat (15) by establishing valvular pipeline, the outlet of the oil-poor pump of described heat (15) is divided into two-way, the washing oil pipe (3) of leading up to is connected to the washing oil pipe (6) of washing the benzene tower after connecting successively described one section oil-poor water cooler (4) and two sections oil-poor water coolers (5), another road is connected to the washing oil storage tank (13) that the coking crude benzene operation has by hot washing oil oil feed pipe (14), residue groove (10), well heater (12) import of at least one groove in refined heavy benzole groove (8) or the naphtalene oil groove (9), the outlet of described each groove well heater (12) is connected to the backflow import of oil-poor groove (2) by washing oil used oil pipe (11), and described hot washing oil oil feed pipe (14) is provided with valve.
2. energy-saving coking crude benzene storage tank heating system as claimed in claim 1 is characterized in that: the connecting tube between described one section oil-poor water cooler (4) and the two sections oil-poor water coolers (5), and to the washing oil pipe (6) of washing the benzene tower, all be provided with valve.
3. energy-saving coking crude benzene storage tank heating system as claimed in claim 1, it is characterized in that: described hot washing oil oil feed pipe (14) is connected to the import of each groove well heater (12) by each oil-feed arm, the outlet of described each groove well heater (12) is connected to washing oil used oil pipe (11) by respectively going out oil inlet pipe, and described each oil-feed arm reaches respectively to go out all to be provided with valve on the oil inlet pipe.
4. energy-saving coking crude benzene storage tank heating system as claimed in claim 1 is characterized in that: all be provided with thermometer on described washing oil storage tank (13), residue groove (10), refined heavy benzole groove (8) and the naphtalene oil groove (9).
5. energy-saving coking crude benzene storage tank heating system as claimed in claim 1, it is characterized in that: described backflow import is arranged on the top of described oil-poor groove (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204245216U CN202730092U (en) | 2012-08-24 | 2012-08-24 | Energy-saving heating system of coking crude benzol storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204245216U CN202730092U (en) | 2012-08-24 | 2012-08-24 | Energy-saving heating system of coking crude benzol storage tank |
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| Publication Number | Publication Date |
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| CN202730092U true CN202730092U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012204245216U Withdrawn - After Issue CN202730092U (en) | 2012-08-24 | 2012-08-24 | Energy-saving heating system of coking crude benzol storage tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876394A (en) * | 2012-08-24 | 2013-01-16 | 南京钢铁股份有限公司 | Energy-saving method and system for heating coking crude benzene storage tank |
-
2012
- 2012-08-24 CN CN2012204245216U patent/CN202730092U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876394A (en) * | 2012-08-24 | 2013-01-16 | 南京钢铁股份有限公司 | Energy-saving method and system for heating coking crude benzene storage tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130213 Effective date of abandoning: 20140122 |
|
| RGAV | Abandon patent right to avoid regrant |