CN207730038U - A kind of stove tail gas vertical heat exchanger - Google Patents
A kind of stove tail gas vertical heat exchanger Download PDFInfo
- Publication number
- CN207730038U CN207730038U CN201820077249.6U CN201820077249U CN207730038U CN 207730038 U CN207730038 U CN 207730038U CN 201820077249 U CN201820077249 U CN 201820077249U CN 207730038 U CN207730038 U CN 207730038U
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- China
- Prior art keywords
- heat exchanger
- wind
- hot
- blast
- vertical heat
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- Expired - Fee Related
Links
- 230000008676 import Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a kind of stove tail gas vertical heat exchangers.The heat exchange area of vertical heat exchanging pipe is divided into 36 vertical opposite confined spaces, each confined space connection cold wind import and hot-blast outlet, it is independent to exchange heat；Each cold wind import has independent wind turbine air feed.The start-stop quantity of wind turbine is controlled by PLC according to the temperature of gas inlet and the temperature difference of offgas outlet.The hot wind of the hot-blast outlet is collected by wind-collecting cover, and it is combustion-supporting to be sent into kiln burning system.Vertical heat exchanger is controlled the start-stop of wind turbine by PLC, has been accomplished that cooling capacity is adjustable, saved wind turbine electric energy by the way of subregion cooling；Using the type of attachment of blast joint, replacement efficiency is improved, the maintenance cost of heat exchanger is greatly reduced, saves maintenance time, improve efficiency；By the way of hot wind for combustion supporting, heat energy recycle is accomplished.
Description
Technical field
The utility model is applied to lime production field, more particularly to a kind of vertical heat exchanging for the cooling of stove tail gas
Device.
Background technology
In lime production manufacture, the High-temp. kiln tail gas after limestone calcination needs to discharge, and object is contained in high-temperature tail gas
Feed powder dirt, need to just can be with qualified discharge after deduster dedusting.Deduster mostly uses fiber bag precipitator, due to exhaust temperature compared with
Height can burn out dust-removal cloth-bag, cannot directly enter deduster, so needing to carry out cooling processing to tail gas.
Stove tail gas is mostly cooled down by vertical heat exchanger, and as shown in Fig. 1, high-temperature tail gas enters from inlet exhaust gas 1
Heat exchanger passes through out of heat exchanger tube 6, and after cooling, low temperature exhaust gas out enters bag filter, cold air from offgas outlet 3
Enter from cold wind import 5, pass through outside heat exchanger tube 6, is out discharged into air from hot-blast outlet 2 after heated.In tail gas
Part dust is fallen into ash bucket 4, is opened blowdown valve after a certain period of time and is released.The startup of cooling blower and Boiler pressure control are by tail gas
The height of temperature carries out rule of thumb artificial control, and this coarse control mode makes the control of offgas outlet temperature unstable,
Sometimes the temperature of offgas outlet 3 is higher, and the higher dust-removal cloth-bag that can burn out deduster, there are the hidden of explosive combustion when excessively high
Suffer from, relatively low it will cause the wastes of cooling blower electric power energy.
Moreover, heat exchanger tube is connected using direct welding manner, stove high-temperature tail gas contains tiny material dust, these high speeds
Dust washes away pipeline, causes pipeline head abrasion run-down, needs to safeguard in time and replace.This replacement, which is safeguarded, to need to expend greatly
The manpower of amount and time cause maintenance cost height.
Invention content
The technical issues of the utility model is solved be：A kind of power-saving vertical heat exchanger, one side offgas outlet are provided
Temperature is relative constant, saves the electric energy of cooling blower, on the other hand reduces maintenance cost.
Technical solution used by the utility model is：
The heat exchange area of vertical heat exchanging pipe is divided into 3-6 vertical opposite confined airs by a kind of power-saving vertical heat exchanger
Between, each confined space connection cold wind import and hot-blast outlet are independent to exchange heat；Each cold wind import has independent wind turbine air feed.
The start-stop quantity of wind turbine is controlled by PLC according to the temperature of gas inlet and the temperature difference of offgas outlet.The hot wind of the hot-blast outlet
It is collected by wind-collecting cover, it is combustion-supporting to be sent into kiln burning system.
Further, the top of the heat exchanger tube is equipped with blast joint, and the upper weld of the blast joint has baffle ring, wear-resisting
Connector is inserted by the hole of steel plate in heat exchanger tube.Baffle ring was both played a supporting role, and sealing function is also functioned to.
The utility model obtain advantageous effect be：Vertical heat exchanger controls wind by the way of subregion cooling by PLC
The start-stop of machine has accomplished that cooling capacity is adjustable, has saved wind turbine electric energy；Using the type of attachment of blast joint, replacement is improved
Efficiency greatly reduces the maintenance cost of heat exchanger, saves maintenance time, improves efficiency；Using hot wind for combustion supporting
Mode has accomplished heat energy recycle.
Description of the drawings
Fig. 1 is vertical heat exchanger structural schematic diagram；
Fig. 2 is the utility model structure diagram；
Fig. 3 is blast joint structural schematic diagram.
Wherein：1- gas inlets, 2- hot-blast outlets, 3- offgas outlets, 4- ash buckets, 5- cold wind imports, 6- heat exchanger tubes, 7-
Blast joint, 8- wind-collecting covers, 9- steel plates, 10- baffle rings.
Specific implementation mode
As shown in Fig. 2, the heat exchange area of vertical heat exchanger is divided into multiple vertical relatively closed spaces, Mei Gexiang
To closed piece cold wind import 5 of space unicom and hot-blast outlet 2, every cold wind import 5 connects a cold wind motor, Mei Gemi
The cooling for closing space is relatively independent, and all hot-blast outlets 2 are collected through wind-collecting cover 8, are sent to utilizable position.It is relatively close
The Spatial General 6 R closed is 3-6, very little, does not have the adjustable effect of cooling capacity, and too much, control system is complicated, increases cost.
The present embodiment is divided into five relatively closed spaces, links five cold wind motors, the switches of five cold wind motors by
PLC is controlled, and to obtain metastable offgas outlet temperature, the control input of PLC is the temperature of gas inlet 1 and offgas outlet 3
Degree is poor, and opening and stop according to the temperature difference five cold wind motors of control accomplishes that the exchange capability of heat of heat exchanger is controllable.For example, general
In the case of, the refractory ability of dust-removal cloth-bag can set offgas outlet temperature as 200 DEG C, then be entered according to tail gas at 250 DEG C or so
The temperature difference of the temperature and offgas outlet of mouth, to control the quantity for opening cooling blower, both sides relation see the table below.
| The temperature difference（℃） | ≤100 | 100—200 | 200—300 | 300—400 | 400—500 |
| Open number of motors | 1 | 2 | 3 | 4 | 5 |
When gas inlet temperature drift, when the temperature difference is bigger than normal, more cold wind electric motor startings, reinforcement pair can be controlled by PLC
The cooling of tail gas can be controlled more cold wind motors by PLC and be closed, save electric energy when gas inlet temperature is relatively low, full simultaneously
The temperature control requirement of sufficient offgas outlet.Using the controllable cooling system, exhaust temperature control accuracy ± 5 DEG C.
The hot wind collected through wind-collecting cover 8 is sent into kiln burning system, for combustion-supporting, improve the efficiency of combustion of fuel, accomplishes
The recycling of thermal energy, has saved the energy.
Attached drawing 3 is the portions the A partial enlarged view of attached drawing 2, in order to mitigate the difficulty that the abrasion of 6 head of heat exchanger tube is replaced, is used
The form of blast joint 7.The upper weld of blast joint 7 has baffle ring 10, blast joint 7 to be inserted into heat exchanger tube by the hole of steel plate 9
In 6,10 existing supporting role of baffle ring also has sealing function.The dust high speed that high-temperature tail gas carries washes away blast joint 7, will not
It causes to wear in the head of exchange heat pipe.After blast joint 7 is worn to a certain extent, blast joint 7 can be removed, again more
It changes.It is this to replace the replacement for avoiding entire heat exchanger tube, weld job is also eliminated, when not only saving material, but also saving
Between, greatly reduce the maintenance cost of heat exchanger.
The mode that the utility model is cooled down by using vertical heat exchanger subregion accomplishes that cooling capacity is adjustable, has saved wind
Electromechanical energy；Using the type of attachment of blast joint, the maintenance cost of heat exchanger is greatly reduced, saves maintenance time, is improved
Efficiency；By the way of hot wind for combustion supporting, heat energy recycle is accomplished.
Claims (4)
1. a kind of stove tail gas vertical heat exchanger, it is characterised in that：By heat exchanger tube（6）Region is vertically divided into 3-6 a relatively close
Space is closed, each confined space connects cold wind import（5）And hot-blast outlet（2）, independent to exchange heat, each cold wind import（5）Have solely
Vertical wind turbine air feed；The heat exchanger tube（6）Top blast joint is installed（7）.
2. vertical heat exchanger according to claim 1, it is characterised in that：The start-stop quantity of the wind turbine is controlled by PLC.
3. vertical heat exchanger according to claim 1, it is characterised in that：The hot-blast outlet（2）Hot wind by wind-collecting cover
（8）It collects.
4. vertical heat exchanger according to claim 1, it is characterised in that：The blast joint（7）Upper weld have gear
Ring（10）, blast joint（7）Pass through steel plate（9）Hole, be inserted into heat exchanger tube（6）It is interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820077249.6U CN207730038U (en) | 2018-01-17 | 2018-01-17 | A kind of stove tail gas vertical heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820077249.6U CN207730038U (en) | 2018-01-17 | 2018-01-17 | A kind of stove tail gas vertical heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207730038U true CN207730038U (en) | 2018-08-14 |
Family
ID=63083006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820077249.6U Expired - Fee Related CN207730038U (en) | 2018-01-17 | 2018-01-17 | A kind of stove tail gas vertical heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207730038U (en) |
-
2018
- 2018-01-17 CN CN201820077249.6U patent/CN207730038U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180814 |