CN209726893U - A kind of catalysis flue gas waste heat recovery reutilization system - Google Patents
A kind of catalysis flue gas waste heat recovery reutilization system Download PDFInfo
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- CN209726893U CN209726893U CN201920156806.8U CN201920156806U CN209726893U CN 209726893 U CN209726893 U CN 209726893U CN 201920156806 U CN201920156806 U CN 201920156806U CN 209726893 U CN209726893 U CN 209726893U
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Abstract
A kind of catalysis flue gas waste heat recovery reutilization system, including flue gas purification device, device for recovering waste heat of high-temperature flue, low-temperature flue gas waste heat recyclable device, described flue gas purification device one end is connected with catalytic unit, so that original high-temperature flue gas purification becomes high-temperature flue gas, the flue gas purification device other end is connected with device for recovering waste heat of high-temperature flue one end, so as to become low-temperature flue gas after cooling high-temperature fume, the device for recovering waste heat of high-temperature flue other end is connected with low-temperature flue gas waste heat recyclable device, so as to become room temperature flue gas after low-temperature flue gas cooling.The utility model is provided with low-temperature flue gas waste heat recyclable device, waste heat in effective recycling and reusing low-temperature flue gas, realize the recycling of catalysis flue gas low-temperature waste heat, greatly reduce the temperature of room temperature flue gas, desulfurization, dedusting demisting, out of stock processing are carried out to catalysis flue gas simultaneously, makes to be emitted into the room temperature flue gas in atmosphere and meets environmental requirement.
Description
Technical field
The utility model relates to petrochemical industry flue gas waste heat recovery technology fields more particularly to a kind of catalysis fume afterheat to return
Receive reutilization system.
Background technique
The catalysis flue-gas temperature that catalytic unit generates is up to 500 DEG C or more, although the prior art is delivered to flue gas is catalyzed
Superheater, evaporator cool down step by step in preheater, superheater, evaporator, pre- so that cooling high-temperature fume becomes low-temperature flue gas
Hot device is separately recovered a part of heat in high-temperature flue gas, and low-temperature flue gas is fed directly to chimney, but low-temperature flue gas
Temperature is still higher, and low-temperature flue gas is directly emitted into atmosphere by temperature between 130 DEG C -200 DEG C, causes low-temperature flue gas
Middle amount of heat is lost, and causes the low-temperature flue gas waste heat wasting of resources, is reduced catalysis flue gas waste heat recovery and is recycled efficiency.
Summary of the invention
In view of this, in view of the above deficiencies, it is necessary to propose a kind of catalysis flue gas waste heat recovery reutilization system.
A kind of catalysis flue gas waste heat recovery reutilization system, including flue gas purification device, device for recovering waste heat of high-temperature flue,
Low-temperature flue gas waste heat recyclable device, described flue gas purification device one end are connected with catalytic unit, by the original in catalytic unit
Beginning high-temperature flue gas is delivered in flue gas purification device, so that original high-temperature flue gas purification becomes high-temperature flue gas, the gas cleaning
The device other end is connected with device for recovering waste heat of high-temperature flue one end, and high-temperature flue gas is delivered to the recycling of high-temperature flue gas waste heat
In device, the device for recovering waste heat of high-temperature flue cools down to high-temperature flue gas, so as to become low temperature after cooling high-temperature fume
Flue gas, the device for recovering waste heat of high-temperature flue other end is connected with low-temperature flue gas waste heat recyclable device, by low-temperature flue gas
It being delivered in low-temperature flue gas waste heat recyclable device, the low-temperature flue gas waste heat recyclable device cools down to low-temperature flue gas, so that
Become room temperature flue gas after low-temperature flue gas cooling, the flue gas purification device includes water sealed tank, desulfurizing tower, dedusting demister, denitration
Tower, described water sealed tank one end are connected with catalytic unit, original high-temperature flue gas are delivered in water sealed tank, and the water sealed tank is another
One end is connected with desulfurizing tower one end, and the desulfurizing tower carries out desulfurization process, the desulfurizing tower other end to original high-temperature flue gas
It is connected with dedusting demister one end, the dedusting demister is dusted demisting processing, the dedusting to original high-temperature flue gas
The demister other end is connected with denitrating tower one end, and the denitrating tower carries out denitration process, the high temperature to original high-temperature flue gas
Flue gas waste heat recovery apparatus includes superheater, evaporator, preheater, and described superheater one end is connected with the denitrating tower other end,
The superheater carries out first time cooling to high-temperature flue gas, and the superheater other end is connected with evaporator one end, the steaming
It sends out device and second of cooling is carried out to high-temperature flue gas, described preheater one end is connected with the evaporator other end, the preheater pair
High-temperature flue gas carries out third time cooling, realizes the recycling and reusing of high-temperature flue gas waste heat, the low-temperature flue gas waste heat recyclable device
Including refrigerant evaporator, gas-liquid separator, compressor, heat exchanger, the refrigerant evaporator input terminal and preheater other end phase
Connection, low-temperature flue gas is delivered in refrigerant evaporator, the refrigerant evaporator cools down to low-temperature flue gas, the refrigerant
The first output end of evaporator is connected with external chimney, by room temperature flue gas emission into atmosphere, the refrigerant evaporator second
Output end is connected with gas-liquid separator one end, and the gas-liquid separator will heat up the coolant media after vaporization and carry out gas-liquid point
From, described compressor one end is connected with the gas-liquid separator other end, and the compressor compresses gaseous coolant medium, with
Gaseous coolant medium is set to become the gaseous coolant medium of high temperature and pressure, described heat exchanger one end is connected with the compressor other end,
Accessed inside the heat exchanger external cold water source and be in contact with the pipeline for the gaseous coolant medium for being connected with high temperature and pressure with into
Row heat exchange, so that external cold water source becomes hot water, the heat exchanger other end and external hot water tank after absorbing heat
It is connected, realizes the recycling and reusing of low temperature exhaust heat.
Preferably, it is additionally provided with the first regulating valve on the pipeline that described water sealed tank one end is connected with catalytic unit, it is described
The second regulating valve is additionally provided on the pipeline that refrigerant evaporator input terminal is connected with the preheater other end.
Preferably, the refrigerant evaporator input terminal is connected on pipeline with the preheater other end is additionally provided with the first temperature
Sensor is additionally provided with second temperature sensing on the pipeline that first output end of refrigerant evaporator is connected with external chimney
Device.
The utility model is provided with low-temperature flue gas waste heat recyclable device, obtains after device for recovering waste heat of high-temperature flue is handled
Low-temperature flue gas be delivered in refrigerant evaporator, the coolant media inside low-temperature flue gas and refrigerant evaporator exchanges heat, low-temperature flue gas
Become room temperature flue gas after heat release, the coolant media in refrigerant evaporator vaporizes after absorbing heat, and refrigerant evaporator will be after vaporization
Coolant media is delivered in gas-liquid separator, so that the coolant media after vaporization carries out gas-liquid separation, then by gaseous coolant medium
It is delivered in compressor, so that gaseous coolant medium becomes the gaseous coolant medium of high temperature and pressure, then by the gaseous state of high temperature and pressure
Coolant media is delivered in heat exchanger, so that the external cold water source in the gaseous coolant medium of high temperature and pressure and heat exchanger carries out
Heat exchange, external cold water source become hot water after absorbing heat, then by delivery into external hot water tank for production line
It uses, the recycling and reusing of low temperature exhaust heat is realized, such as by delivery into power steam boiler, so that power steam boiler is straight
The energy consumption for greatly reducing power steam boiler to hot water heating is connect, it is substantially energy saving.The utility model is provided with low temperature
Flue gas waste heat recovery apparatus, the waste heat in effective recycling and reusing low-temperature flue gas realize returning for catalysis flue gas low-temperature waste heat
It receives, greatly reduces the temperature of room temperature flue gas, while desulfurization, dedusting demisting, denitration process are carried out to catalysis flue gas, make to be emitted into
Room temperature flue gas in atmosphere meets environmental requirement.
Detailed description of the invention
Fig. 1 is the schematic diagram for being catalyzed flue gas waste heat recovery reutilization system.
In figure: water sealed tank 11, the first regulating valve 111, desulfurizing tower 12, dedusting demister 13, denitrating tower 14, superheater 21,
Evaporator 22, preheater 23, the second regulating valve 231, the first temperature sensor 232, refrigerant evaporator 31, second temperature sensor
311, gas-liquid separator 32, compressor 33, heat exchanger 34；Catalytic unit 101, chimney 102.
Specific embodiment
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Referring to Fig. 1, the utility model provides a kind of catalysis flue gas waste heat recovery reutilization system, including gas cleaning dress
It sets, device for recovering waste heat of high-temperature flue, low-temperature flue gas waste heat recyclable device, described flue gas purification device one end and catalytic unit
101 are connected, and the original high-temperature flue gas in catalytic unit 101 is delivered in flue gas purification device, so that original high temperature cigarette
Gas purification becomes high-temperature flue gas, and the flue gas purification device other end is connected with device for recovering waste heat of high-temperature flue one end, with
High-temperature flue gas is delivered in device for recovering waste heat of high-temperature flue, the device for recovering waste heat of high-temperature flue carries out high-temperature flue gas
Cooling, so as to become low-temperature flue gas, the device for recovering waste heat of high-temperature flue other end and low-temperature flue gas after cooling high-temperature fume
Waste-heat recovery device is connected, and low-temperature flue gas is delivered in low-temperature flue gas waste heat recyclable device, the low-temperature flue gas waste heat
Recyclable device cools down to low-temperature flue gas, so as to become room temperature flue gas after low-temperature flue gas cooling；
The flue gas purification device includes water sealed tank 11, desulfurizing tower 12, dedusting demister 13, denitrating tower 14, the water seal
11 one end of tank is connected with catalytic unit 101, and original high-temperature flue gas is delivered in water sealed tank 11, to prevent original high temperature cigarette
Gas leaks during transportation, and 11 other end of water sealed tank is connected with 12 one end of desulfurizing tower, by original high temperature cigarette
Gas is delivered in desulfurizing tower 12, and the desulfurizing tower 12 carries out desulfurization process to original high-temperature flue gas, to remove original high-temperature flue gas
In sulfur dioxide, mercaptan, 12 other end of desulfurizing tower is connected with 13 one end of dedusting demister, after desulfurization process
Original high-temperature flue gas is delivered in dedusting demister, and the dedusting demister is dusted demisting processing to original high-temperature flue gas,
To remove dust, the water mist in original high-temperature flue gas, 13 other end of dedusting demister is connected with 14 one end of denitrating tower, with
Original high-temperature flue gas after dedusting demisting is delivered in denitrating tower 14, the denitrating tower 14 carries out denitration to original high-temperature flue gas
Processing makes original high-temperature flue gas purification become height to remove the NOx in original high-temperature flue gas by desulfurization, dedusting demisting, denitration
Warm flue gas；
The device for recovering waste heat of high-temperature flue includes superheater 21, evaporator 22, preheater 23, the superheater 21 1
End is connected with 14 other end of denitrating tower, and high-temperature flue gas is delivered in superheater 21, and the superheater 21 is to high-temperature flue gas
First time cooling is carried out, to recycle a part of heat in high-temperature flue gas, 21 other end of superheater and 22 one end of evaporator
It is connected, the high-temperature flue gas after first time is cooled down is delivered in evaporator 22, and the evaporator 22 carries out high-temperature flue gas
Second of cooling, to recycle a part of heat in high-temperature flue gas, described 23 one end of preheater is connected with 22 other end of evaporator
It connects, the high-temperature flue gas after second is cooled down is delivered in preheater 23, and the preheater 23 carries out third to high-temperature flue gas
Secondary cooling, by cooling down three times, becomes low temperature cigarette after making cooling high-temperature fume to recycle a part of heat in high-temperature flue gas
Gas, while superheater 21, evaporator 22, preheater 23 recycle the heat in high-temperature flue gas step by step, realize high-temperature flue gas waste heat
Recycling and reusing；
The low-temperature flue gas waste heat recyclable device includes refrigerant evaporator 31, gas-liquid separator 32, compressor 33, heat exchanger
34,31 input terminal of refrigerant evaporator is connected with 23 other end of preheater, and low-temperature flue gas is delivered to refrigerant evaporator
In 31, the refrigerant evaporator 31 cools down to low-temperature flue gas, becomes room temperature flue gas, refrigerant evaporator after low-temperature flue gas heat release
Coolant media in 31 vaporizes after absorbing heat, and 31 first output end of refrigerant evaporator is connected with external chimney 102, with
By room temperature flue gas emission into atmosphere, 31 second output terminal of refrigerant evaporator is connected with 32 one end of gas-liquid separator, institute
Stating gas-liquid separator 32 will heat up the coolant media progress gas-liquid separation after vaporization, described 33 one end of compressor and gas-liquid separator
32 other ends are connected, and gaseous coolant medium is delivered in compressor 33, the compressor 33 to gaseous coolant medium into
Row compression, so that gaseous coolant medium becomes the gaseous coolant medium of high temperature and pressure, described 34 one end of heat exchanger and compressor 33
The other end is connected, and the gaseous coolant medium of high temperature and pressure is delivered in heat exchanger 34, accesses inside the heat exchanger 34
External cold water source is simultaneously in contact with the pipeline for the gaseous coolant medium for being connected with high temperature and pressure to carry out heat exchange, so that external cold
Water water source becomes hot water after absorbing heat, and 34 other end of heat exchanger is connected with external hot water tank, and hot water is defeated
It send into external hot water tank and is used for production line, realize the recycling and reusing of low temperature exhaust heat.
Further, the first regulating valve is additionally provided on the pipeline that described 11 one end of water sealed tank is connected with catalytic unit 101
111, the second regulating valve is additionally provided on the pipeline that 31 input terminal of refrigerant evaporator is connected with 23 other end of preheater
231。
Specifically, the temperature of the first temperature sensor 232 monitoring low-temperature flue gas, by low-temperature flue gas temperature and preset temperature ratio
Right: when low-temperature flue gas temperature is not less than preset temperature, the first regulating valve 111 does not adjust；When low-temperature flue gas temperature is less than in advance
If when temperature, illustrate that catalytic unit 101 exports original high-temperature flue gas flow velocity is too low or superheater 21, evaporator 22, preheater
23 workloads are excessively high, increased by adjusting the original high-temperature flue gas flow velocity that the first regulating valve 111 exports catalytic unit 101,
And then increase inflow total amount when high-temperature flue gas first time cooling, second of cooling, third time cooling, in uncomfortable whole superheater
21, in the case where evaporator 22,23 workload of preheater, more high-temperature flue gas pass through superheater 21, evaporator 22, preheating
Become low-temperature flue gas after device 23, low-temperature flue gas temperature is promoted to be increased to preset temperature；Or by reducing superheater 21, evaporator
22,23 workload of preheater reduces superheater 21, evaporator 22, preheater 23 to the heat exchange degree of high-temperature flue gas, uncomfortable
In the case where the original high-temperature flue gas flow velocity that whole catalytic unit 101 exports, so that cooling high-temperature fume is become low-temperature flue gas, promote low
Warm flue-gas temperature is increased to preset temperature.
Specifically, second temperature sensor 311 monitors the temperature of room temperature flue gas, by room temperature flue-gas temperature and preset temperature ratio
Right: when room temperature flue-gas temperature is less than preset temperature, the second regulating valve 231 does not adjust；When room temperature flue-gas temperature is not less than pre-
If when temperature, illustrating that low-temperature flue gas flow velocity in refrigerant evaporator 31 is excessively high or 31 workload of refrigerant evaporator is too low, passing through
Adjusting the second regulating valve 231 reduces the low-temperature flue gas flow velocity being delivered in refrigerant evaporator 31, reduces low-temperature flue gas and is delivered to
Inflow total amount in refrigerant evaporator 31, in the case where not adjusting 31 workload of refrigerant evaporator, less low-temperature flue gas
By becoming room temperature flue gas after refrigerant evaporator 31, room temperature flue-gas temperature is promoted to be increased to preset temperature；Or by improving refrigerant
31 workload of evaporator increases refrigerant evaporator 31 to the heat exchange degree of low-temperature flue gas, is not adjusting low-temperature flue gas flow velocity
In the case of, promote room temperature flue-gas temperature to be increased to preset temperature.
Further, 31 input terminal of refrigerant evaporator is connected on pipeline with 23 other end of preheater is additionally provided with first
Temperature sensor 232, to monitor the temperature of low-temperature flue gas, 31 first output end of refrigerant evaporator and 102 phase of external chimney
Second temperature sensor 311 is additionally provided on the pipeline of connection, to monitor the temperature of room temperature flue gas.
Specifically, the room temperature flue-gas temperature is at 30-60 DEG C.
Specific implementation step:
1) the original high-temperature flue gas in catalytic unit 101 is delivered in water sealed tank 11, then step by step by original high-temperature flue gas
It is delivered to desulfurizing tower 12, dedusting demister 13, denitrating tower 14, to carry out desulfurization, dedusting demisting, denitration to original high-temperature flue gas,
So as to become high-temperature flue gas after original high-temperature flue gas purification；
2) high-temperature flue gas is delivered to superheater 21, evaporator 22, in preheater 23, step by step to carry out three to high-temperature flue gas
Secondary cooling, so as to become low-temperature flue gas after cooling high-temperature fume, while superheater 21, evaporator 22, preheater 23 are separately recovered
A part of heat in high-temperature flue gas realizes the recycling and reusing of high-temperature flue gas waste heat；
3) low-temperature flue gas is delivered in refrigerant evaporator 31, the coolant media inside low-temperature flue gas and refrigerant evaporator 31
Heat exchange becomes room temperature flue gas after low-temperature flue gas heat release, the coolant media in refrigerant evaporator 31 vaporizes after absorbing heat, and refrigerant steams
Coolant media after vaporization is delivered in gas-liquid separator 32 by hair device 31, so that the coolant media after vaporization carries out gas-liquid point
From, then gaseous coolant medium is delivered in compressor 33, so that the gaseous state that gaseous coolant media collapse becomes high temperature and pressure is cold
Medium, then the gaseous coolant medium of high temperature and pressure is delivered in heat exchanger 34, so that the gaseous coolant medium of high temperature and pressure
Heat exchange is carried out with the external cold water source in heat exchanger 34, so that external cold water source becomes hot water after absorbing heat, then will
Delivery is used into external hot water tank for production line, realizes the recycling and reusing of low temperature exhaust heat.
Module or unit in the utility model embodiment device can be merged according to actual needs, divide and be deleted
Subtract.
Above disclosures are merely preferred embodiments of the utility model, the utility model cannot be limited with this certainly
Interest field, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and according to this reality
The equivalent variations made by novel claim, still falls within the scope of the utility model.
Claims (3)
1. a kind of catalysis flue gas waste heat recovery reutilization system, it is characterised in that: including flue gas purification device, high-temperature flue gas waste heat
Recyclable device, low-temperature flue gas waste heat recyclable device, described flue gas purification device one end are connected with catalytic unit, will be catalyzed dress
The original high-temperature flue gas set is delivered in flue gas purification device, so that original high-temperature flue gas purification becomes high-temperature flue gas, it is described
The flue gas purification device other end is connected with device for recovering waste heat of high-temperature flue one end, and high-temperature flue gas is delivered to high-temperature flue gas
In waste-heat recovery device, the device for recovering waste heat of high-temperature flue cools down to high-temperature flue gas, so that after cooling high-temperature fume
As low-temperature flue gas, the device for recovering waste heat of high-temperature flue other end is connected with low-temperature flue gas waste heat recyclable device, will
Low-temperature flue gas is delivered in low-temperature flue gas waste heat recyclable device, and low-temperature flue gas drops in the low-temperature flue gas waste heat recyclable device
Temperature, so as to become room temperature flue gas after low-temperature flue gas cooling, the flue gas purification device includes water sealed tank, desulfurizing tower, dedusting demisting
Device, denitrating tower, described water sealed tank one end is connected with catalytic unit, original high-temperature flue gas is delivered in water sealed tank, described
The water sealed tank other end is connected with desulfurizing tower one end, and the desulfurizing tower carries out desulfurization process, the desulfurization to original high-temperature flue gas
The tower other end is connected with dedusting demister one end, and the dedusting demister is dusted demisting processing to original high-temperature flue gas,
The dedusting demister other end is connected with denitrating tower one end, and the denitrating tower carries out denitration process to original high-temperature flue gas,
The device for recovering waste heat of high-temperature flue includes superheater, evaporator, preheater, described superheater one end and the denitrating tower other end
It is connected, the superheater carries out first time cooling to high-temperature flue gas, and the superheater other end is connected with evaporator one end,
The evaporator carries out second to high-temperature flue gas and cools down, and described preheater one end is connected with the evaporator other end, described pre-
Hot device carries out third time cooling to high-temperature flue gas, realizes the recycling and reusing of high-temperature flue gas waste heat, and the low-temperature flue gas waste heat returns
Receiving apparatus includes refrigerant evaporator, gas-liquid separator, compressor, heat exchanger, and the refrigerant evaporator input terminal and preheater are another
One end is connected, and low-temperature flue gas is delivered in refrigerant evaporator, and the refrigerant evaporator cools down to low-temperature flue gas, institute
The first output end of refrigerant evaporator is stated to be connected with external chimney, by room temperature flue gas emission into atmosphere, the refrigerant evaporation
Device second output terminal is connected with gas-liquid separator one end, and the coolant media that the gas-liquid separator will heat up after vaporization carries out gas
Liquid separation, described compressor one end are connected with the gas-liquid separator other end, and the compressor presses gaseous coolant medium
Contracting, so that gaseous coolant medium becomes the gaseous coolant medium of high temperature and pressure, described heat exchanger one end and compressor other end phase
Connection, the heat exchanger inside access external cold water source and are in contact with the pipeline for the gaseous coolant medium for being connected with high temperature and pressure
To carry out heat exchange, so that external cold water source becomes hot water after absorbing heat, the heat exchanger other end and external hot water are stored up
Storage is connected, and realizes the recycling and reusing of low temperature exhaust heat.
2. as described in claim 1 catalysis flue gas waste heat recovery reutilization system, it is characterised in that: described water sealed tank one end with
The first regulating valve, the refrigerant evaporator input terminal and preheater other end phase are additionally provided on the pipeline that catalytic unit is connected
The second regulating valve is additionally provided on the pipeline of connection.
3. catalysis flue gas waste heat recovery reutilization system as described in claim 1, it is characterised in that: the refrigerant evaporator is defeated
Enter end and be connected on pipeline with the preheater other end to be additionally provided with the first temperature sensor, first output end of refrigerant evaporator
Second temperature sensor is additionally provided on the pipeline being connected with external chimney.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920156806.8U CN209726893U (en) | 2019-01-28 | 2019-01-28 | A kind of catalysis flue gas waste heat recovery reutilization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920156806.8U CN209726893U (en) | 2019-01-28 | 2019-01-28 | A kind of catalysis flue gas waste heat recovery reutilization system |
Publications (1)
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