CN101319780A - Sorting type slag cooler - Google Patents
Sorting type slag cooler Download PDFInfo
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- CN101319780A CN101319780A CNA2008101152449A CN200810115244A CN101319780A CN 101319780 A CN101319780 A CN 101319780A CN A2008101152449 A CNA2008101152449 A CN A2008101152449A CN 200810115244 A CN200810115244 A CN 200810115244A CN 101319780 A CN101319780 A CN 101319780A
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Abstract
The invention provides a sorting type slag cooler, which comprises a box body, a slag inlet opening and an overflow deslagging opening. The slag inlet opening is arranged at one end of the box body, and the overflow deslagging opening is arranged at the other end of the box body. The sorting type slag cooler is characterized in that a separating wall, guiding funnel caps, S-shaped funnel caps, and air output and air pressure distributing chambers are also arranged in the box body, the box body is separated into four cooling beds through the separating wall, the guiding funnel caps and the S-shaped funnel caps are arranged at the bottom part of the cooling beds, and the air output and air pressure distributing chambers are arranged at the lower parts of the guiding funnel caps and the S-shaped funnel caps. The sorting type slag cooler meets the cooling requirements of various circulating fluidized bed boilers for deslagging, the excess heat can be fully recoveried, the sorting type slag cooler can fully meet the requirements of secure and stable operation and large development of the large and medium-size circulating fluidized bed boilers, and is energy saving and environment protective.
Description
Technical field
The present invention relates to a kind of cold slag machine, relate in particular to a kind of sorting type slag cooler that is applicable to the firepower power station CFBB.
Background technology
China is an energy consumption big country based on coal, how to save coal consumption, makes coal become clean energy resource, just becomes the key subjects that national economy sustainable development will solve.At present, existing thousands of of the following circulating fluidized bed combustion coal boiler of domestic 200MW level is put into commercial operation, many 300MW level circulating fluidized bed combustion coal boiler success commercializations simultaneously, and domestic 600MW supercritical circulating fluidized bed boiler enters the research and development stage, CFBB is accelerated to high parameter maximization direction process, the gas-solid biphase flow characteristic generation important change of boiler furnace requires corresponding cold slag machine must adapt to the requirement of high parameter CFBB.The in service of cold slag machine of maximizing in future, the waste heat recovery of fine grain recovery and slag is particularly important in the deslagging.
Yet domestic cold slag machine is in technology and in servicely have many shortcomings, is difficult to ensure effectively the normal and stability and safety operation of boiler slag removal cooling etc.The cold slag machine of roller exists wear-out defect, leakage phenomenon to happen occasionally, and can not reclaim the waste heat of slag, and water consumption is big.Wind and water combined cold slag machine easily stops up, coking, and deslagging is not smooth, defectives such as undercapacity.Air bath type slag cooling machine, air-cooled ratio is too big, and erosive wear is serious in the bed, and big slag cooling is not enough.The external all kinds of cold slag machine of introducing is because domestic ature of coal is poor, and it is poor that coal changes adaptive capacity, when particularly the quantity of slag is big, easily stop up, and coking, it is not enough to exert oneself, and the slag temperature is higher, influences the stove internal combustion, can't ensure the normal stable operation of boiler.
Summary of the invention
The present invention is in order to overcome many deficiencies of above-mentioned prior art, a kind of energy-conservation sorting type slag cooler is provided, comprise casing, slag inlet, overflow and slag mouth, described slag inlet is located at an end of described casing, described overflow and slag mouth is located at the other end of described casing, it is characterized in that also being provided with in the described casing partition wall, wind cap, pigtail blast cap, airflow pressure distributing chamber, described obstruct wall waters the moulding of material feeding ramming by high-temperature wearable, with casing be divided into 4 cooling bed; Wind cap is located at described cooling bed bottom, is used for the separation of slag thickness particle; The pigtail blast cap is located at described cooling bed bottom, is used for the fluidisation of thin slag; Airflow pressure distributing chamber is located at the below of described guiding blast cap, described pigtail blast cap, is used for the distribution of airflow pressure.
Wherein, described casing is a frame structure, and wall and roof adopt heat-insulation and heat-preservation material, high-temperature wearable to water the moulding of material feeding ramming, and its roof is designed to the circular arc arch.
Wherein, four described cooling bed tops communicate, cooling bed for the sorting bed near slag inlet, remain three cooling bed be followed successively by 2,3, No. 4 cooling bed.
Wherein, described guiding blast cap is located at the bottom of described sorting bed, and described pigtail blast cap is located at described 2,3, No. 4 cooling bed bottoms.
Wherein, described cooling bed bottom is provided with urgent slag-drip opening, is used for the urgent discharge of slag.
Wherein, the top of described casing also is provided with the hot blast return aperture, is used for melting down of high-temperature hot-air.
Wherein, described hot blast return aperture is located at cooling bed to corresponding described casing top with No. 2.
Wherein, the middle part of described obstruct wall is provided with port, is used for moving of thin slag.
Wherein, be respectively equipped with serpentine coil in cooling bed, be used for the cooling of thin slag for described 2,3, No. 4.
Wherein, described slag-drip opening is provided with blocking valve, is used to control the discharge of gas.
Advantage of the present invention and beneficial effect are:
The present invention adapts to the requirement of various CFBB deslagginves cooling, and fully recovery waste heat can satisfy the requirement of big-and-middle-sized CFBB safety, stable operation and large scale development fully, not only energy-conservation but also environmental protection.
Description of drawings
Fig. 1 is the general structure schematic diagram of the embodiment of the invention;
Fig. 2 is the A-A cross-sectional schematic of Fig. 1;
Fig. 3 is the B-B cross-sectional schematic of Fig. 1.
Among the figure: 1, No. 1 cooling bed; 2, No. 2 cooling bed; 3, No. 3 cooling bed; 4, No. 4 cooling bed; 5, casing; 6, slag inlet; 7, overflow and slag mouth; 8, pigtail blast cap; 9, wind cap; 10, airflow pressure distributing chamber; 11, serpentine coil; 12, partition wall; 13, high-temperature wearable waters the material feeding body of wall; 14, heat-insulation and heat-preservation material body of wall; 15, port; 16, hot blast return aperture; 17, blocking valve; 18, urgent slag-drip opening.
The specific embodiment
Below with reference to diagram the specific embodiment of the present invention is described.
Shown in Fig. 1～3, casing of the present invention (5) profile frame is welded into a rectangular body by section bar and steel plate tissue, for strengthening structural strength, the top is made into the circular arc arch, wall and top adopt insulation material, high-temperature wearable to water the moulding of material feeding ramming, specifically can adopt the steel fibre wear-resistant castable.End at casing is provided with slag inlet (6), and the other end is provided with slag-drip opening (7).The three stifled walls (12) that intercept are set in casing, with casing be divided into 4 cooling bed, from right to left number consecutively be 1,2,3, No. 4 cooling bed, wherein No. 1 cooling bed for the sorting bed, be used for the sorting of slag, 2,3, No. 4 cooling bed coolings that are used for thin slag, each cooling bed top communicates, hot wind supply backflow cavity intercepts wall and waters the moulding of material feeding ramming by high-temperature wearable.In the centre position that is used to cut apart 2,3, No. 4 cooling bed obstruct walls port (15) is set, be convenient to thin slag from No. 2 cooling bed to 3, No. 4 cooling bed flowing, be expelled to blocking valve (17) from overflow and slag mouth (7) again.Described blocking valve (17) is located at overflow and slag mouth (7), is used to control the discharge of gas.Port (15) is preferably dimensioned to be the port of the wide 300mm of long 1200mm*, and port (15) preferably is higher than the 500mm place apart from blast cap described later.This set can effectively keep an interior slag to obtain sufficient cooling heat transferring effect.At the casing top, the position of corresponding No. 2 cooling bed high-temperature regions, hot blast return aperture (16) is set, described hot blast return aperture (16) is communicated with the dilute-phase zone of boiler furnace by pipe, can effectively send the high-temperature region high-temperature hot-air back to burner hearth, positive effect be arranged, can reduce the follow-up heat exchange load of cold slag machine simultaneously improving boiler thermal output, to reducing the slag temperature, the operating load that reduces cold slag machine greatly takes on a new look.
No. 1 cooling bed bottom is provided with wind cap (9), is used for the separation of slag thickness particle, and quantity is 24; 2,3, No. 4 cooling bed bottoms are provided with pigtail blast cap (8), are used for the fluidisation of thin slag, and 30 pigtail blast caps (8) respectively are set in each is cooling bed.In the blast cap bottom 4 independent airflow pressure distributing chamber (10) are set, are used to the airflow pressure that distributes.2, in 3, No. 4 cooling bed beds water-cooled serpentine coil (11) is set, is used for the cooling of thin slag, interior uniform 10 groups of each bed is supplied water by the water-cooled header.2,3, No. 4 cooling bed bottoms are provided with the urgent slag-drip opening of accident (18), are used for the urgent discharge of slag.
The course of work of the cold slag machine of the invention described above sorting embodiment is as follows:
The high temperature furnace slag of boiler, at first by the external automatic air quantity slag input valve control slag input amount of sorting type slag cooler, enter No. 1 cooling bed, slag is subjected to upwards blowing afloat fluidisation from the wind of airflow pressure distributing chamber (10) through wind cap (9), and (fluidising air velocity approximately＞=40m/s), it is cooling bed that the following thin slag of the 8mm of the little and good fluidity of quality can enter No. 2 or No. 3 along the wind direction of wind cap like this, wind plays the cooling cooling effect simultaneously, enter No. 2 cooling bed, about about 500 degrees centigrade of the slag temperature of this moment, thick slag is because quality is deposited on cooling bed bottom greatly No. 1, the thick slag time of staying is greater than thin slag, the thickness slag has been separated effectively like this, avoiding thick slag to enter No. 2 cooling bedly causes second-time burning and coking (No. 2 cooling bed air quantity is little, and wind speed is low) takes place.Thick slag is discharged (discharge slag temperature＜=200 degrees centigrade) again after thick slag blow device is sent thick slag into thick slag cooler and cooled off.2,3, No. 4 cooling bed bottom is provided with pigtail blast cap (8), blow afloat thin slag through pigtail blast cap (8) for wind by airflow pressure distributing chamber (10) and make it to form little bubbling state fluidisation, this moment is main by water-cooled serpentine coil (11) heat exchange cooling, 2,3, No. 4 the cooling bed middle obstruct wall middle port (15) that leans on is connected, air-cooled in these three beds ratio be about 15～20%, to No. 4 cooling bed slag temperature drops to 120～170 degrees centigrade, discharge by No. 4 cooling bed overflow and slag mouths (7) again, fine particle returns burner hearth by casing top hot blast return aperture (16), returns the wind-warm syndrome degree and is about 250～350 degrees centigrade.
As seen from the above embodiment, sorting type slag cooler of the present invention adopts the thickness isolation technics, has thoroughly solved a bad drawback of interior fluidisation, has overcome thick slag second-time burning coking accident and has taken place; And do not have mechanical transmission, thereby cause leakage phenomenon to take place yet, be i.e. noiselessness, safety and environmental protection again with regard to not having mechanical wear; Water-cooled serpentine coil cooling water wherein can be used demineralized water, sends into oxygen-eliminating device after the heating, also can use condensate water, sends into low-pressure heater after the heating, thereby reduces the gas consumption amount of oxygen-eliminating device or low pressure heating, energy savings; Hot blast after the heating need not through any middle device, directly carries unburnt fine breeze and the pulverized limestone and the hot flue gas that do not utilize fully return burner hearth, can substitute part secondary wind, thereby improve boiler combustion efficiency, energy savings; This device is based on water-cooled, and air-cooled is auxilliary, does not need to dispose separately cold slag blower fan.Utilize the first and second blower fan wind more than needed of boiler just passable, so operating cost is low, not only energy-conservation but also lower consumption; This device is by optimum organization design, and it is simple in structure, and maintenance is convenient, and maintenance cost is low, can long-term safety, stable operation.Wide accommodation adapts to the ciculation fluidized boiler of large-scale unit (Circulating Fluidized Bed, CFB) supporting application especially.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improvement and modification also should be considered as protection scope of the present invention.
Claims (10)
1, a kind of sorting type slag cooler comprises casing, slag inlet, overflow and slag mouth, and described slag inlet is located at an end of described casing, and described overflow and slag mouth is located at the other end of described casing, it is characterized in that, also is provided with in the described casing:
Intercept wall, water the moulding of material feeding ramming by high-temperature wearable, with described casing be divided into four cooling bed;
Wind cap is located at described cooling bed bottom, is used for the separation of slag thickness particle;
The pigtail blast cap is located at described cooling bed bottom, is used for the fluidisation of thin slag;
Airflow pressure distributing chamber is located at the below of described guiding blast cap, described pigtail blast cap, is used for the distribution of airflow pressure.
2, sorting type slag cooler as claimed in claim 1 is characterized in that, described casing is a frame structure, and wall and roof adopt heat-insulation and heat-preservation material, high-temperature wearable to water the moulding of material feeding ramming, and described roof is designed to the circular arc arch.
3, sorting type slag cooler as claimed in claim 1 is characterized in that, four described cooling bed tops communicate, near the cooling bed of slag inlet is the sorting bed, be used for the sorting and the cooling of slag, remain three cooling bed be followed successively by 2,3, No. 4 cooling bed, be used for the cooling of thin slag.
4, sorting type slag cooler as claimed in claim 3 is characterized in that, described guiding blast cap is located at the bottom of described sorting bed, and described pigtail blast cap is located at described 2,3, No. 4 cooling bed bottoms.
5, sorting type slag cooler as claimed in claim 4 is characterized in that, described cooling bed bottom is provided with urgent slag-drip opening, is used for the urgent discharge of slag.
6, sorting type slag cooler as claimed in claim 4 is characterized in that, the top of described casing also is provided with the hot blast return aperture, is used for melting down of high-temperature hot-air.
7, sorting type slag cooler as claimed in claim 6, its special opening is that described hot blast return aperture is located at and No. 2 cooling bed corresponding described casing tops.
8, sorting type slag cooler as claimed in claim 3 is characterized in that, the middle part of described obstruct wall is provided with port, and the mobile passage that provides of thin slag is provided.
9, sorting type slag cooler as claimed in claim 3 is characterized in that, is respectively equipped with serpentine coil in cooling bed, is used for the cooling of thin slag for described 2,3, No. 4.
10, as each described sorting type slag cooler of claim 1～9, it is characterized in that described slag-drip opening is provided with blocking valve, be used to control the discharge of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101152449A CN101319780A (en) | 2008-06-19 | 2008-06-19 | Sorting type slag cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101152449A CN101319780A (en) | 2008-06-19 | 2008-06-19 | Sorting type slag cooler |
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| Publication Number | Publication Date |
|---|---|
| CN101319780A true CN101319780A (en) | 2008-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101152449A Pending CN101319780A (en) | 2008-06-19 | 2008-06-19 | Sorting type slag cooler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943403A (en) * | 2010-09-30 | 2011-01-12 | 重庆大学 | Double-separation type fluidized bed slag cooler |
| CN109737374A (en) * | 2019-03-13 | 2019-05-10 | 常州市长江热能有限公司 | A kind of circulating fluidized bed boiler |
| CN111747389A (en) * | 2020-07-16 | 2020-10-09 | 宜昌东圣磷复肥有限责任公司 | Monoammonium phosphate powder spraying production system |
-
2008
- 2008-06-19 CN CNA2008101152449A patent/CN101319780A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943403A (en) * | 2010-09-30 | 2011-01-12 | 重庆大学 | Double-separation type fluidized bed slag cooler |
| CN101943403B (en) * | 2010-09-30 | 2011-11-23 | 重庆大学 | Double-separation type fluidized bed slag cooler |
| CN109737374A (en) * | 2019-03-13 | 2019-05-10 | 常州市长江热能有限公司 | A kind of circulating fluidized bed boiler |
| CN111747389A (en) * | 2020-07-16 | 2020-10-09 | 宜昌东圣磷复肥有限责任公司 | Monoammonium phosphate powder spraying production system |
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Open date: 20081210 |