CN203100463U - Waste heat recycling device for titanium dioxide calcining tail gas - Google Patents
Waste heat recycling device for titanium dioxide calcining tail gas Download PDFInfo
- Publication number
- CN203100463U CN203100463U CN2013200509099U CN201320050909U CN203100463U CN 203100463 U CN203100463 U CN 203100463U CN 2013200509099 U CN2013200509099 U CN 2013200509099U CN 201320050909 U CN201320050909 U CN 201320050909U CN 203100463 U CN203100463 U CN 203100463U
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- China
- Prior art keywords
- heat medium
- outlet
- heat
- inlet
- tail gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000007789 gas Substances 0.000 title claims abstract description 60
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000002918 waste heat Substances 0.000 title claims abstract description 23
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 22
- 238000001354 calcination Methods 0.000 title claims abstract description 13
- 238000004064 recycling Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims abstract description 11
- 239000000523 sample Substances 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 69
- 239000003795 chemical substances by application Substances 0.000 description 68
- 235000010215 titanium dioxide Nutrition 0.000 description 14
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Gas Separation By Absorption (AREA)
Abstract
本实用新型涉及钛白粉煅烧尾气余热回收装置，包括换热器和蒸发器；换热器设有尾气入口、尾气出口、以及位于尾气入口和尾气出口之间的换热管，换热管的一端为第一热媒入口、另一端为第一热媒出口；蒸发器设有进水口、蒸汽出口、以及位于进水口和蒸汽出口之间的热媒管，热媒管的一端为第二热媒入口、另一端为第二热媒出口；第一热媒入口与第二热媒出口连通，第一热媒出口与第二热媒入口连通，换热管和热媒管形成供热媒循环流动的管路空间。采用本实用新型的结构后，可使钛白粉煅烧尾气温度大为降低，可减少后续喷淋的喷水量，同时能有效回收余热，实现节能减排。
The utility model relates to a waste heat recovery device for titanium dioxide calcined tail gas, comprising a heat exchanger and an evaporator; the heat exchanger is provided with a tail gas inlet, a tail gas outlet, a heat exchange tube located between the tail gas inlet and the tail gas outlet, and one end of the heat exchange tube It is the first heat medium inlet, and the other end is the first heat medium outlet; the evaporator is provided with a water inlet, a steam outlet, and a heat medium pipe between the water inlet and the steam outlet, and one end of the heat medium pipe is the second heat medium The inlet and the other end are the second heat medium outlet; the first heat medium inlet is connected to the second heat medium outlet, the first heat medium outlet is connected to the second heat medium inlet, and the heat exchange tube and the heat medium tube form a circulation flow of the heat medium piping space. After adopting the structure of the utility model, the temperature of the exhaust gas from calcining titanium dioxide can be greatly reduced, the amount of water sprayed in subsequent spraying can be reduced, and waste heat can be effectively recovered to realize energy saving and emission reduction.
Description
Technical field
The utility model relates to a kind of titanium dioxide calcining using waste heat from tail gas retracting device, belongs to the energy-conserving and environment-protective technical field.
Background technology
According to the knowledge of the applicant, in the sulfuric acid method titanium pigment production technology, the calcining tail gas main component of discharging from rotary kiln is N
2, O
2, CO
2, and a large amount of H
2O steam etc., acid mist gases such as the sulfur dioxide that containing simultaneously responds discharges, sulfur trioxide, and carry a spot of titanium white dust secretly.According to surveying and determination, when making fuel with coal gas, 1 ton of titanium dioxide of every production, the discharge tail gas amount has 15000-20000Nm approximately
3, about 400 ℃ of the temperature of tail gas; Every Nm
3The about 10g of trioxygen-containing sulphur in the tail gas, the about 0.5g of sulfur dioxide, the about 0.15g of titanium dioxide dust.
Titanium dioxide calcining exhaust temperature is very high, generally about 400 ℃, adopts the method for direct recirculated water spray desulfurization cooling at present mostly, enters follow-up equipments such as scrubbing tower after making tail gas be cooled to 60～70 ℃ again.But this processing method can cause a large amount of heat wastes, and heat can not get effective utilization.Simultaneously, because the tail gas water capacity is big, and contains acid mist gas, oxysulfide, titanium dioxide dust etc., cooling system had very strong corrosivity; If directly this tail gas is carried out waste heat recovery, be used for producing steam or heat production water etc., there is very big dew point corrosion risk; But if the heating surface temperature of waste heat recovery apparatus is controlled at more than the acid dew point, then exhaust temperature can only drop to about 330 ℃, UTILIZATION OF VESIDUAL HEAT IN is insufficient, and when titanium white production was used the kiln load fluctuation, still there was the risk of dew point corrosion in heat transmission equipment.
The utility model content
The purpose of this utility model is: at the problem that above-mentioned prior art exists, provide a kind of titanium dioxide calcining using waste heat from tail gas retracting device, can avoid occurring dew point corrosion, using waste heat from tail gas is fully used.
In order to reach above purpose, the technical solution of the utility model is as follows:
Titanium dioxide calcining using waste heat from tail gas retracting device comprises heat exchanger and evaporimeter; It is characterized in that described heat exchanger is provided with gas inlet, tail gas outlet and the heat exchanger tube between gas inlet and tail gas outlet, an end of described heat exchanger tube is that first heating agent inlet, the other end are the outlet of first heating agent; Described evaporimeter is provided with water inlet, steam (vapor) outlet and the heat medium pipe between water inlet and steam (vapor) outlet, and an end of described heat medium pipe is that second heating agent inlet, the other end are the outlet of second heating agent; Described first heating agent inlet is communicated with the outlet of second heating agent, and described first heating agent outlet is communicated with second heating agent inlet, and described heat exchanger tube and heat medium pipe form the pipeline space that the heat supply matchmaker circulates.
The further technical scheme of the utility model is as follows:
Preferably, also comprise the bypass line that is communicated with outlet of second heating agent and second heating agent inlet, described bypass line is provided with flow controller, and described flow controller has first temperature-sensing probe that detects the first heating agent porch heat medium temperature and second temperature-sensing probe that detects tail gas exit exhaust temperature.
Preferably, described heat exchanger is upright tubular, and described gas inlet, tail gas outlet lay respectively at upper end, the lower end of heat exchanger; Described heat exchanger tube turntable around, described first heating agent inlet, the outlet of first heating agent all are positioned at the heat exchanger side, and described first heating agent inlet is positioned at the below of first heating agent outlet.
Preferably, the water inlet of described evaporimeter is positioned at the evaporimeter lower side, and described steam (vapor) outlet is positioned at the evaporimeter top; Second heating agent inlet of described heat medium pipe is positioned at the below of second heating agent outlet.
Preferably, described evaporimeter also is provided with the heating agent that is communicated with outlet of first heating agent and second heating agent inlet and enters the chamber, is communicated with the heating agent that the outlet of second heating agent and first heating agent enter the mouth and goes out the chamber, and described heating agent enters the chamber and is positioned at the below that heating agent goes out the chamber.
Preferably, described base of evaporator also is provided with sewage draining exit.
Preferably, described first heating agent inlet is communicated with the outlet of second heating agent through first pipeline, and described first heating agent outlet is communicated with second heating agent inlet through second pipeline, and described first pipeline or second pipeline are provided with the heating agent pump.
The utility model adopts split-type structural, heating agent circulates in heat exchanger and evaporimeter, to be used to add hot water from the heat that tail gas absorbs and form steam,, can when guaranteeing to make full use of using waste heat from tail gas, avoid occurring dew point corrosion as long as the control heat medium temperature is higher than the tail gas dew-point temperature.After adopting structure of the present utility model, titanium dioxide calcining exhaust temperature is greatly reduced, can reduce the injection flow rate of follow-up spray, the while is recovery waste heat effectively, realizes energy-saving and emission-reduction.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
Embodiment
The titanium dioxide calcining using waste heat from tail gas retracting device of present embodiment comprises heat exchanger 1 and evaporimeter 2 as shown in Figure 1; Heat exchanger 1 is provided with gas inlet 1-1, tail gas outlet 1-2 and the heat exchanger tube 1-3 between gas inlet 1-1 and tail gas outlet 1-2, and the end of heat exchanger tube 1-3 is that first heating agent inlet 3-1, the other end are first heating agent outlet 3-2; Evaporimeter 2 is provided with water inlet 4-1, steam (vapor) outlet 4-2 and the heat medium pipe 4-3 between water inlet 4-1 and steam (vapor) outlet 4-2, and the end of heat medium pipe 4-3 is that second heating agent inlet 5-1, the other end are second heating agent outlet 5-2; First heating agent inlet 3-1 is communicated with second heating agent outlet 5-2, and first heating agent outlet 3-2 is communicated with second heating agent inlet 5-1, and heat exchanger tube 1-3 and heat medium pipe 4-3 form the pipeline space that the heat supply matchmaker circulates.Like this, heating agent circulates in the pipeline space of heat exchanger tube 1-3 and heat medium pipe 4-3 formation, will be used to add hot water from the heat that tail gas absorbs and form steam; Owing to adopt split-type structural,, can when guaranteeing to make full use of using waste heat from tail gas, avoid occurring dew point corrosion as long as the control heat medium temperature is higher than the tail gas dew-point temperature.
Also comprise the bypass line 6 that is communicated with second heating agent outlet 5-2 and second heating agent inlet 5-1, bypass line 6 is provided with flow controller 6-1, and flow controller 6-1 has first temperature-sensing probe 6-2 that detects first heating agent inlet 3-1 place heat medium temperature and the second temperature-sensing probe 6-3 that detects tail gas outlet 1-2 place exhaust temperature.Like this, flow controller 6-1 can be according to the comparative result of first heating agent inlet 3-1 place heat medium temperature, tail gas outlet 1-2 place's exhaust temperature and predetermined temperature, regulate the heating agent shunt volume of bypass line 6, and then adjusting enters the heating agent flow of heat exchanger heat-exchanging tube 1-3, the heat-transfer surface tube wall temperature of heat exchanger heat-exchanging tube 1-3 is remained at more than the tail gas dew-point temperature, effectively avoid occurring dew point corrosion further.
In addition, heat exchanger 1 is upright tubular, and gas inlet 1-1, tail gas outlet 1-2 lay respectively at upper end, the lower end of heat exchanger 1; Heat exchanger tube 1-3 turntable all is positioned at heat exchanger 1 side around, first heating agent inlet 3-1, first heating agent outlet 3-2, and first heating agent inlet 3-1 is positioned at the below of first heating agent outlet 3-2.
The water inlet 4-1 of evaporimeter 2 is positioned at evaporimeter 2 lower side, and steam (vapor) outlet 4-2 is positioned at evaporimeter 2 tops; Second heating agent inlet 5-1 of heat medium pipe 4-3 is positioned at the below of second heating agent outlet 5-2.
First heating agent inlet 3-1 is communicated with second heating agent outlet 5-2 through first pipeline 8, and first heating agent outlet 3-2 is communicated with second heating agent inlet 5-1 through second pipeline 9, and first pipeline 8 or second pipeline 9 are provided with heating agent pump 10.
During use, in heat exchanger 1, exhaust temperature is cooled to about 280 ℃ by about 400 ℃, can enter recirculated water spray desulfurization cooling then; Simultaneously, heating agent is heated to about 280 ℃ by about 250 ℃, and enters evaporimeter 2.In evaporimeter 2, heating agent heat release cooling, the heat absorption of evaporimeter inner cold water becomes the outer confession of steam, and the heating agent after the cooling enters once more in the heat exchanger 1 and absorbs heat.So circulation promptly realizes the recycling to titanium dioxide calcining using waste heat from tail gas.
The titanium dioxide calcining exhaust temperature of handling through the present embodiment device greatly reduces, and can reduce the injection flow rate of follow-up spray, and the while is recovery waste heat effectively, realizes energy-saving and emission-reduction.
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 (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200509099U CN203100463U (en) | 2013-01-30 | 2013-01-30 | Waste heat recycling device for titanium dioxide calcining tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200509099U CN203100463U (en) | 2013-01-30 | 2013-01-30 | Waste heat recycling device for titanium dioxide calcining tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203100463U true CN203100463U (en) | 2013-07-31 |
Family
ID=48851858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200509099U Expired - Lifetime CN203100463U (en) | 2013-01-30 | 2013-01-30 | Waste heat recycling device for titanium dioxide calcining tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203100463U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756692A (en) * | 2014-02-14 | 2014-04-30 | 南京华电节能环保设备有限公司 | Coke oven tedge waste heat recovery device |
| CN103822514A (en) * | 2014-02-17 | 2014-05-28 | 南京华电节能环保设备有限公司 | Separate circulating pipe type heat pipe heat exchanger |
| CN104764338A (en) * | 2015-03-19 | 2015-07-08 | 南京华电节能环保设备有限公司 | Heat pipe type flue gas pulverized coal heating device |
| CN104990429A (en) * | 2015-07-30 | 2015-10-21 | 广东拉多美化肥有限公司 | Novel mixing boiler adhered material-removing device |
-
2013
- 2013-01-30 CN CN2013200509099U patent/CN203100463U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756692A (en) * | 2014-02-14 | 2014-04-30 | 南京华电节能环保设备有限公司 | Coke oven tedge waste heat recovery device |
| CN103756692B (en) * | 2014-02-14 | 2015-11-25 | 南京华电节能环保设备有限公司 | Coke oven tedge waste heat recovery device |
| CN103822514A (en) * | 2014-02-17 | 2014-05-28 | 南京华电节能环保设备有限公司 | Separate circulating pipe type heat pipe heat exchanger |
| CN104764338A (en) * | 2015-03-19 | 2015-07-08 | 南京华电节能环保设备有限公司 | Heat pipe type flue gas pulverized coal heating device |
| CN104990429A (en) * | 2015-07-30 | 2015-10-21 | 广东拉多美化肥有限公司 | Novel mixing boiler adhered material-removing device |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |