CN206310473U - A kind of low temperature exhaust heat recycling system - Google Patents
A kind of low temperature exhaust heat recycling system Download PDFInfo
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- CN206310473U CN206310473U CN201621291473.2U CN201621291473U CN206310473U CN 206310473 U CN206310473 U CN 206310473U CN 201621291473 U CN201621291473 U CN 201621291473U CN 206310473 U CN206310473 U CN 206310473U
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- lime set
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Abstract
The utility model provides a kind of low temperature exhaust heat recycling system, it is characterized in that, the entrance of low pressure lime set tank is connected with steam condensate feedway, the further gas-liquid separation of steam condensate that low pressure lime set tank exports steam condensate feedway obtains the first temperature lime set, the first temperature lime set injection heat exchange cooling system；Heat exchange cooling system is connected with the outlet of low pressure lime set tank, heat exchange cooling system includes a heat exchanger, a heat tracing water supply system, lower temperature side het water injection heat exchanger from heat tracing water supply system, lower temperature side het water is flowed out after absorbing the first temperature lime set heat through heat exchanger heat tracing water out, second temperature lime set is obtained after the cooling of first temperature lime set, second temperature lime set flows into low pressure lime set tank through steam condensate outlet；Low pressure lime set tank is met the 3rd temperature lime set of aftertreatment systems needs to second temperature lime set gas-liquid separation.
Description
Technical field
The utility model is related to chemical plant installations lime set system Low and mid temperature heat recovery to utilize system.
Background technology
Lime set, boiler platoon and 1.30MPa low pressure from middle pressure lime set tank 1.30MPa in ethylene unit lime set system are steamed
The low pressure lime set that vapour user produces enters into low pressure lime set tank, flashes off pressure for the low low-pressure steams of 0.35MPa are incorporated to low pressure
Steam pipe system, produces liquid phase part lime set pressure 0.35MPa, and temperature is 150 DEG C, wherein have 30~40 DEG C of low-temperature heat quantity, no
Can be used effectively, though causing postorder lime set after heat exchange, temperature remains above resins exchange exchange most before entering refined mixed bed
Between 38 DEG C~42 DEG C of good temperature, cause resins exchange ability, the cycle of operation is short.By setting up a water-water heat exchanger, profit
The side het water returned with device absorbs lime set low temperature exhaust heat, while side het water's heating steam consumption is reduced, further reduces
Lime set temperature, realizes that low temperature exhaust heat is effectively utilized, exchange capacity of the reinforced resin under preference temperature, extends its cycle of operation.
Utility model content
The purpose of this utility model is to solve, in lime set system hypothermia waste heat overstock problem, heat unnecessary in lime set to be returned
Receive, eliminate the waste of heat.
The utility model provides a kind of low temperature exhaust heat recycling system, the system and steaming in order to achieve the above object
Vapour lime set feedway is connected, and the system includes：Low pressure lime set tank, heat exchange cooling system, low pressure lime set tank；
The entrance of the low pressure lime set tank is connected with the steam condensate feedway, and outlet connects with heat exchange cooling system
Connect, the further gas-liquid separation of steam condensate from steam condensate feedway is obtained the first temperature lime set by low pressure lime set tank,
By the first temperature lime set through low pressure lime set tank outlet injection heat exchange cooling system；
It is described heat exchange cooling system include a heat exchanger, a heat tracing water supply system, heat exchanger be provided with steam condensate import,
Steam condensate outlet, heat tracing water inlet, heat tracing water out, low pressure lime set tank outlet are connected with steam condensate import, the heat tracing
Feed system connects and composes circulating heat exchange system with heat exchanger heat tracing water inlet, outlet, from the relatively low of heat tracing water supply system
Temperature side het water injects heat exchanger, through heat exchanger heat tracing water out stream after lower temperature side het water the first temperature lime set heat of absorption
Go out, while obtaining second temperature lime set after the first temperature lime set is lowered the temperature, second temperature lime set flows into low through steam condensate outlet
Low pressure lime set tank；
The low pressure lime set tank entrance is connected with the steam condensate outlet of heat exchanger, and low pressure lime set tank is to second temperature
Lime set gas-liquid separation is met the 3rd temperature lime set of aftertreatment systems needs, and the 3rd temperature lime set flows into subsequent treatment system
System.
Described low temperature exhaust heat recycling system, the heat tracing feed system includes a heat tracing return main line, a companion
Hot water inlet's branch line, a heat tracing water out branch line, a main communicating valve, the main communicating valve are arranged on heat tracing return main,
The heat tracing water inlet branch line, the heat tracing water out branch line, institute are respectively drawn on heat tracing return main's line of main communicating valve both sides
State heat tracing water inlet branch line to be connected with heat exchanger heat tracing water inlet, the heat tracing water out branch line connects with heat exchanger tube heat tracing water out
Connect.
Described low temperature exhaust heat recycling system, the heat tracing water inlet branch line, the heat tracing water out branch line are all provided with
There is valve.
Described low temperature exhaust heat recycling system, the heat exchanger heat tracing water inlet, steam condensate outlet are arranged at and change
Hot device top, the heat exchanger heat tracing water out, steam condensate import are arranged at heat exchanger bottom, and steam condensate outlet connection is steamed
Vapour condensate outlet pipeline, steam condensate outlet line other end connection low pressure lime set tank, steam condensate import connection steam coagulates
Liquid inlet line, steam condensate inlet line other end connection low pressure lime set tank.
Described low temperature exhaust heat recycling system, lower temperature side het water passes through the side het water after being exchanged heat through heat exchanger
Outlet branch line is back to heat tracing return main's line, and flowing into tracing system through heat tracing return main line re-uses.
Described low temperature exhaust heat recycling system, is additionally provided with the Liquid level valve group of the solidifying liquid level of tank of a detection low pressure,
The Liquid level valve group is arranged on the steam condensate inlet line of heat exchanger or steam condensate outlet line.
Described low temperature exhaust heat recycling system, the first temperature lime set is exported from low pressure lime set pot bottom, steam condensate
Import enters low pressure lime set tank after entering heat exchanger heat exchange through the steam condensate outlet of heat exchanger.
Described low temperature exhaust heat recycling system, connects between the steam condensate import of heat exchanger and steam condensate outlet
A heat exchanger by-pass is connect, the heat exchanger by-pass is provided with cross-line valve.
Described low temperature exhaust heat recycling system, the steam condensate of the steam condensate feedway is middle pressure lime set tank
The low-pressure steam lime set that the lime set or boiler platoon of 1.30MPa and 1.30MPa low-pressure steams user produce.
The beneficial effects of the utility model are：There is small investment compared with prior art, equipment change amount is small, practicality
By force, it is simple to operate, the features such as advanced technology, the superfluous low temperature exhaust heat that lime set system is produced can effectively be utilized, improving companion
Hot water temperature, while reducing heating steam consumption, makes 30 DEG C~40 DEG C of lime set temperature reduction, is the operation of subsequently refined mixed bed
Provide a favorable guarantee, exchange capacity of the reinforced resin under optimum temperature extends its cycle of operation.
Brief description of the drawings
Fig. 1 is low temperature exhaust heat recycling system structural representation.
Wherein reference is：
The lime set injection pipeline a1 of middle pressure lime set tank 1.30MPa
The low pressure lime set injection pipeline a2 that boiler platoon is produced
The low pressure lime set injection pipeline a3 that 1.30MPa low-pressure steams user produces
Low pressure lime set tank 1
Low low-pressure steam outlet line 11
Liquid level valve group 12
Heat tracing return main line 21
Heat tracing water inlet branch line 211
Valve 2111
Valve 2112
Heat tracing water out branch line 212
Valve 2121
Valve 2122
Main communicating valve 213
Heat exchanger 22
Steam condensate import 221
Steam condensate outlet 222
Heat exchanger heat tracing water inlet 223
Heat exchanger heat tracing water out 224
Heat exchanger by-pass 225
Cross-line valve 2251
Steam condensate inlet line 226
Steam condensate outlet line 227
Low pressure lime set tank 3
Desalination water heater 31
Drop out line 32
Liquid pump 33
Aftertreatment systems 4
Specific embodiment
The utility model provides a kind of low temperature exhaust heat recycling system, and the system connects with steam condensate feedway
Connect, steam condensate feedway is middle pressure lime set tank, boiler platoon, low-pressure steam user in the present embodiment, the system includes：It is low
Pressure lime set tank, heat exchange cooling system, low pressure lime set tank；
The entrance of low pressure lime set tank 1 is connected with steam condensate feedway, such as from the solidifying of middle pressure lime set tank 1.30MPa
The steam condensate that liquid, boiler platoon and 1.30MPa low-pressure steams user produce enters into low pressure lime set tank 1, and low pressure lime set tank 1 will
The further gas-liquid separation of steam condensate of entrance obtains the first temperature lime set, the first temperature lime set injection heat exchange cooling system；
The water required for heat exchange cooling system in the present embodiment is the side het water returned using heating device, increases heat exchange
The purpose of cooling system is to reach the purpose that steam condensate after-heat is absorbed using side het water.These companions from heating device
The temperature of hot water absorbs the waste heat of the first temperature lime set, the heat exchange using side het water well below the temperature of the first temperature lime set
Cooling system is connected with the outlet of low pressure lime set tank 1, and heat exchange cooling system includes a heat exchanger 22, a heat tracing water supply system, changes
Hot device 22 is provided with steam condensate import 221, steam condensate outlet 222, heat exchanger heat tracing water inlet 223, heat exchanger side het water and goes out
Mouth 224, wherein the heat exchanger heat tracing water inlet 221, steam condensate outlet 222 is arranged at heat exchanger top, the heat exchanger
Heat tracing water out, steam condensate import 221 are arranged at heat exchanger bottom, and steam condensate outlet 222 connects steam condensate outlet
Line 227, the other end of steam condensate outlet line 227 connection low pressure lime set tank 3, the connection steam condensate of steam condensate import 221
Inlet line, the other end of steam condensate inlet line 226 connection low pressure lime set tank.
The outlet of low pressure lime set tank 1 is connected with steam condensate import 221, heat tracing feed system and heat exchanger heat tracing water inlet
223rd, outlet 224 connects and composes circulating heat exchange system, the lower temperature side het water injection heat exchanger from heat tracing water supply system
22, lower temperature side het water is flowed out after absorbing the first temperature lime set heat through heat exchanger heat tracing water out 224, the first temperature lime set
Second temperature lime set is obtained after cooling, second temperature lime set flows into low pressure lime set tank 3 through steam condensate outlet 222；
Heat tracing feed system includes a heat tracing return main line 21, a heat tracing water inlet branch line 211, a heat tracing water out branch
Line 212, a main communicating valve 213, the main communicating valve 213 is arranged on heat tracing return main, in the companion of the both sides of main communicating valve 213
The heat tracing water inlet branch line 211, the heat tracing water out branch line 212, the side het water are respectively drawn on hot return main's line 21
Entrance branch line 211 is connected with heat exchanger heat tracing water inlet, the heat tracing water out branch line 212 and heat exchanger tube heat tracing water out 224
Connection.Valve is equipped with heat tracing water inlet branch line 211, heat tracing water out branch line 212, as shown in figure 1, side het water passes through valve
2111 and after valve 2112 carries out heat exchange intensification into heat exchanger and the first lime set, pass through valve 2121 and valve by pressure itself
Door 2122 sends into heat tracing return main line 21, into heat tracing water system.
The connected mode of lime set and heat exchanger using being entered by down, on go out by the way of, the connected mode of side het water and heat exchanger,
By the way of upper entering and lower leaving, specifically, the first temperature lime set is from the outlet at bottom of low pressure lime set tank 1, steam condensate import 221
Steam condensate outlet 222 after into heat exchanger heat exchange through heat exchanger enters low pressure lime set tank 3.Carry out self-heated return main's line
21 lower temperature side het water passes through through heat tracing water inlet branch line 211, heat exchanger heat tracing water inlet injection heat exchanger, heat exchange after completing
Heat exchanger heat tracing water out, heat tracing water out branch line 212 are incorporated to heat tracing return main line 21.In the present embodiment, all pipelines connect
Connect using welding, remaining valve is connected using flange, and pipeline, valve material use carbon steel.
Connection one is provided with cross-line valve 2251 between the steam condensate import 221 of heat exchanger and steam condensate outlet 222
Heat exchanger by-pass 225, control under by-pass state with to be reached switch under heat exchanger malfunction, the normal of lime set system is not influenceed
The purpose of operation.
In order to detect the liquid level of low pressure lime set tank 1 at any time, go out in low pressure lime set tank outlet line or heat exchange cooling system
Liquid level valve group is set on mouth pipeline, in the present embodiment, second temperature lime set is from steam condensate outlet 222 through fluid level control valve
Group enters low pressure lime set tank 3, and low pressure lime set tank 3 is connected with the steam condensate outlet 222 of heat exchanger, low pressure lime set tank 3
The 3rd temperature lime set of aftertreatment systems needs is met to second temperature lime set gas-liquid separation, the 3rd temperature lime set is flowed into
Aftertreatment systems, the aftertreatment systems in the present embodiment specific embodiment refer into subsequently refined mixed bed.The present embodiment
Fluid temperature in the 3rd temperature lime set obtained after the middle cooling through too low low pressure lime set tank meets resins exchange and exchanges optimal temperature
Degree scope (between 38 DEG C~42 DEG C).
Claims (9)
1. a kind of low temperature exhaust heat recycling system, the system is connected with steam condensate feedway, and the system includes：It is low
Pressure lime set tank, heat exchange cooling system, low pressure lime set tank；
The entrance of the low pressure lime set tank is connected with the steam condensate feedway, and outlet is connected with heat exchange cooling system, low
The further gas-liquid separation of steam condensate from steam condensate feedway is obtained the first temperature lime set by pressure lime set tank, by first
Temperature lime set is through low pressure lime set tank outlet injection heat exchange cooling system；
The heat exchange cooling system includes a heat exchanger, a heat tracing water supply system, and heat exchanger is provided with steam condensate import, steam
Condensate outlet, heat tracing water inlet, heat tracing water out, low pressure lime set tank outlet are connected with steam condensate import, the heat tracing supply
System connects and composes circulating heat exchange system with heat exchanger heat tracing water inlet, outlet, the lower temperature from heat tracing water supply system
Side het water injects heat exchanger, and lower temperature side het water is flowed out after absorbing the first temperature lime set heat through heat exchanger heat tracing water out,
Second temperature lime set is obtained after the first temperature lime set is lowered the temperature simultaneously, second temperature lime set flows into low pressure through steam condensate outlet
Lime set tank；
The low pressure lime set tank entrance is connected with the steam condensate outlet of heat exchanger, and low pressure lime set tank is to second temperature lime set
Gas-liquid separation is met the 3rd temperature lime set of aftertreatment systems needs, and the 3rd temperature lime set flows into aftertreatment systems.
2. low temperature exhaust heat recycling system as claimed in claim 1, it is characterised in that the heat tracing feed system includes
Heat tracing return main line, a heat tracing water inlet branch line, a heat tracing water out branch line, a main communicating valve, the main communicating valve are set
In on heat tracing return main, the heat tracing water inlet branch line, institute are respectively drawn on heat tracing return main's line of main communicating valve both sides
Heat tracing water out branch line is stated, the heat tracing water inlet branch line is connected with heat exchanger heat tracing water inlet, the heat tracing water out branch line
It is connected with heat exchanger tube heat tracing water out.
3. low temperature exhaust heat recycling system as claimed in claim 2, it is characterised in that the heat tracing water inlet branch line, institute
State heat tracing water out branch line and be equipped with valve.
4. low temperature exhaust heat recycling system as claimed in claim 2, it is characterised in that the heat exchanger heat tracing water inlet,
Steam condensate outlet is arranged at heat exchanger top, and the heat exchanger heat tracing water out, steam condensate import are arranged under heat exchanger
Portion, steam condensate outlet connection steam condensate outlet line, steam condensate outlet line other end connection low pressure lime set tank steams
The import of vapour lime set connects steam condensate inlet line, steam condensate inlet line other end connection low pressure lime set tank.
5. low temperature exhaust heat recycling system as claimed in claim 2, it is characterised in that lower temperature side het water is through heat exchanger
Heat tracing return main's line is back to by the heat tracing water out branch line after heat exchange, tracing system is flowed into through heat tracing return main line
Re-use.
6. low temperature exhaust heat recycling system as claimed in claim 4, it is characterised in that be additionally provided with a detection low pressure lime set tank
The Liquid level valve group of liquid level, the steam condensate inlet line or steam condensate that the Liquid level valve group is arranged at heat exchanger goes out
On mouth pipeline.
7. low temperature exhaust heat recycling system as claimed in claim 4, it is characterised in that the first temperature lime set is from low pressure lime set
Pot bottom outlet, steam condensate import enter low pressure lime set after entering heat exchanger heat exchange through the steam condensate outlet of heat exchanger
Tank.
8. low temperature exhaust heat recycling system as claimed in claim 1, it is characterised in that in the steam condensate import of heat exchanger
A heat exchanger by-pass is connected between steam condensate outlet, the heat exchanger by-pass is provided with cross-line valve.
9. low temperature exhaust heat recycling system as claimed in claim 1, it is characterised in that the steam condensate feedway
Steam condensate is that the low pressure that the lime set of middle pressure lime set tank 1.30MPa or boiler platoon and 1.30MPa low-pressure steams user produce is steamed
Vapour lime set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621291473.2U CN206310473U (en) | 2016-11-28 | 2016-11-28 | A kind of low temperature exhaust heat recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621291473.2U CN206310473U (en) | 2016-11-28 | 2016-11-28 | A kind of low temperature exhaust heat recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206310473U true CN206310473U (en) | 2017-07-07 |
Family
ID=59249324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621291473.2U Active CN206310473U (en) | 2016-11-28 | 2016-11-28 | A kind of low temperature exhaust heat recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206310473U (en) |
-
2016
- 2016-11-28 CN CN201621291473.2U patent/CN206310473U/en active Active
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