CN103571512A - Thermal gas flow circulating type winnowed coal humidifying process for indirectly utilizing waste gas of coke oven flue - Google Patents
Thermal gas flow circulating type winnowed coal humidifying process for indirectly utilizing waste gas of coke oven flue Download PDFInfo
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Abstract
The invention discloses a thermal gas flow circulating type winnowed coal humidifying process for indirectly utilizing waste gas of a coke oven flue. The process is mainly carried out in a full-boiling windowing drying fluidized bed and a hot waste gas waste heat utilizing system, wherein the hot waste gas waste heat utilizing system comprises a hot gas closed circulating system and a waste heat recycling system. Firstly, the waste heat recycling system utilizes high-temperature hot water converted by utilizing the waste heat of the coke oven flue gas, and supplies heat to the hot gas closed circulating system, wherein a heat-absorbed high-temperature gas medium is conveyed to a segmented air chamber of a fluidized bed; meanwhile, particle materials enter an accommodating cavity of the fluidized bed through a charging end, the high-temperature gas medium penetrates through an air distributing plate to carry out windowing, classifying and drying onto the particle materials, enters a hot gas recycling pipeline of the hot gas closed circulating system through a waste gas collecting and processing system of the fluidized bed, and reflows to a water-gas hot tube heat exchanger, and that cycle repeats. The invention disclosed by the invention is reasonable in flow, sufficient in resource utilization, energy-saving, environment-friendly, and obvious in comprehensive benefits.
Description
Technical field
The present invention relates to a kind of coke-oven plant coking coal preparation technique, relate in particular to a kind of selection by winnowing coal humidifying technology method that utilizes flue gases of cock oven waste heat.
Background technology
The coking coal preparation technique of tradition coke-oven plant is mainly after several coking clean fine coals cooperation pulverizing, to be shove charge, and it does not comprise selection by winnowing drying step.Because flue gases of cock oven adopts chimney natural ventilation, the used heat of 200 ℃ of above high-temperature flue gas that coke oven produces is not utilized effectively yet, and easily atmospheric environment is polluted.In addition, owing to adopting several coking clean fine coals to coordinate, pulverize, the particle of cause≤3mm is crossed pulverizing, and the particle of > 3mm is pulverized not in place, and in shove charge coal, the coal charge of granularity≤3mm is difficult to reach and surpasses 80%, and coke quality is difficult to improve.In addition, the high-moisture of clean fine coal burns gas in the time of also can causing coking more, ammonia vol large and consume the problems such as steam for ammonia still process more, therefore, the coke that traditional technology is produced belongs to high pollution, high energy consumption and resource products, the urgently energy-conserving and emission-cutting technology transformation of its technique.
Given this, current national Ministry of Industry and Information requires to widely popularize in the industry and utilizes flue gases of cock oven waste heat as the coal conditioning technique of dry medium, and this technology is also divided into direct utilization and two kinds of modes of indirect utilization.Directly utilize mode to require to set up large-diameter extraction feed channel remote conveying from coke oven flue and deliver to coal damping equipment, therefore must possess site condition, for this coke-oven plant for industrial land anxiety (no matter being the supporting coke-oven plant of steel mill or the coke-oven plant of independent operation), then build and directly utilize the coal damping technology innovation project of mode and do not meet reality needs.And indirect utilization mode is to water carrier by flue gases of cock oven heat energy displacement, so just, can adopt small diameter pipeline to lay conveying, be not subject to place limit profit, but indirect utilization mode need adopt the heat-exchanger rig that efficiency of conversion is high could improve heat utilization rate, and need select suitable drying medium and the high selection by winnowing coal damping equipment of heat utilization rate, to form a kind of hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat.
Therefore, for domestic now coal chemical enterprise, seek a kind ofly meet target for energy-saving and emission-reduction, be applicable to enterprise's site condition, production cost is controlled and can also improve the coking technological transformation processing method of coke output and quality, is that those skilled in the art endeavour the target of pursuing for a long time.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provide that a kind of flow process is reasonable, the utilization of resources fully, energy-conserving and environment-protective, not only can be used for newly-built, but also can adapt to the hot gas flow circular form selection by winnowing coal humidifying technology method of the indirect utilization flue gases of cock oven waste heat of built coke-oven plant, this technique not only can solve above-mentioned many technical problems that traditional coke-oven plant coking coal preparation technique exists, and can overcome the limitation factors such as site condition, reach the object of energy-conserving and emission-cutting technology transformation.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is a kind of hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat, this hot gas flow circular form selection by winnowing coal humidifying technology is mainly to carry out in full boiling selection by winnowing drying fluidized-bed and hot waste gas bootstrap system, described full boiling selection by winnowing drying fluidized-bed comprises body skin and air distribution plate, air distribution plate is groove shape (from cross section), in general, air distribution plate is from the feed end of bed body to discharge end inclination (from vertical section), the coated fluidized-bed cavity volume that forms of described body skin and air distribution plate, described air distribution plate is mainly comprised of the cloth wind side plate of middle cloth wind base plate and both sides, on cloth wind base plate, offer the ventilation bottom outlet being connected with the segmentation air compartment (main air chamber) of described full boiling selection by winnowing drying fluidized-bed, on described cloth wind side plate, offer the ventilation side opening being connected with the segmentation air compartment (crosswind chamber) of described full boiling selection by winnowing drying fluidized-bed, described cloth wind base plate is to be formed by connecting before and after the cloth wind group plate by multistage (being generally more than three sections),
Described hot waste gas bootstrap system comprises hot gas closed circuit circulatory system and residual neat recovering system; Described hot gas closed circuit circulatory system comprises aqueous vapor hot tube heat exchanger, hot gas intake ducting, the hot gas gas blower from aqueous vapor hot tube heat exchanger, exported and is back to the hot gas recovery channel of aqueous vapor hot tube heat exchanger, described hot gas intake ducting is communicated to described segmentation air compartment, and the entrance end of described hot gas recovery channel is communicated to the gas sampling treatment system of described full boiling selection by winnowing drying fluidized-bed; Described residual neat recovering system utilizes flue gases of cock oven waste heat to the heat supply of described aqueous vapor hot tube heat exchanger;
This hot gas flow circular form selection by winnowing coal humidifying technology comprises the following steps: first, residual neat recovering system utilizes high-temperature-hot-water that flue gases of cock oven waste heat changes out and to the aqueous vapor hot tube heat exchanger heat supply of described hot gas closed circuit circulatory system, aqueous vapor hot tube heat exchanger is transformed into the heat of high-temperature-hot-water that in the gaseous media in hot gas closed circuit circulatory system, (described hot gas closed circuit circulatory system preferred nitrogen becomes hot gas after heat exchange, selection by winnowing drying medium as closed cycle), the high temperature gas medium absorbing after heat is transported to the segmentation air compartment of described full boiling selection by winnowing drying fluidized-bed by the hot gas intake ducting in hot gas closed circuit circulatory system, meanwhile, need to carry out selection by winnowing classification and dry granules material and enter into fluidized-bed cavity volume by full boiling selection by winnowing drying fluidized-bed bed body feed end, the high temperature gas medium that now enters into each segmentation air compartment carries out selection by winnowing classification and dry through air distribution plate to granule materials, granule materials presents eddy flow fluidized state above air distribution plate, the high-temperature gas that is entered into fluidized-bed cavity volume by segmentation air compartment heats after damping and selection by winnowing classification granule materials, by the gas sampling treatment system of the selection by winnowing drying fluidized-bed that entirely seethes with excitement, entered into the hot gas recovery channel of hot gas closed circuit circulatory system, via hot gas recovery channel, be back in aqueous vapor hot tube heat exchanger again, so move in circles.
In above-mentioned processing method, preferably, described residual neat recovering system comprises air water hot tube heat exchanger, from the hot water inlet pipe road of air water hot tube heat exchanger output be back to hot water backwater's pipeline of air water hot tube heat exchanger, the exit end in described hot water inlet pipe road and the entrance end of hot water backwater's pipeline are all communicated to described aqueous vapor hot tube heat exchanger;
Described residual neat recovering system also comprises a flue gases of cock oven bypass flue to the heat supply of described air water hot tube heat exchanger, the inlet mouth of this flue gases of cock oven bypass flue and air outlet are all arranged on coke oven flue collector, and the coke oven flue collector between inlet mouth and air outlet is provided with flue valve, and flue gases of cock oven bypass flue is provided with flue gas fan;
Above-mentioned residual neat recovering system utilizes flue gases of cock oven waste heat to comprise to the method for described aqueous vapor hot tube heat exchanger heat supply: by coke oven flue collector, flue gases of cock oven in flue gases of cock oven bypass flue carries out heat supply to the hot water in described air water hot tube heat exchanger, low temperature flue gases of cock oven after the heat exchange of air water hot tube heat exchanger continues to be back on coke oven flue collector by the air outlet of flue gases of cock oven bypass flue, high-temperature-hot-water after the heat absorption of air water hot tube heat exchanger enters the hot water inlet pipe road of flowing through successively, aqueous vapor hot tube heat exchanger, hot water backwater's pipeline, and be finally back in air water hot tube heat exchanger.
In above-mentioned processing method, preferably, described hot water inlet pipe is also provided with hot water heat patching device on road, described hot water heat patching device comprises hot water boiler service pump, Low Pressure Gas Network hot water boiler and hot water boiler gas emission device, the air that the fuel gas source of described Low Pressure Gas Network hot water boiler is sent into from coke oven self produced gas and gas blower.Now through the high-temperature-hot-water after air water hot tube heat exchanger heat absorption flow through successively hot water inlet pipe road, hot water heat patching device, delivery pipeline, aqueous vapor hot tube heat exchanger, hot water backwater's pipeline, and be finally back in air water hot tube heat exchanger.Many (the especially southern outdoor coal yards that fluctuate between 9.5%～14% of moisture content due to coking mixed coal, be subject to seasonal effect, fluctuate larger), and entering the dried moisture of stove coal and must be controlled at 7% for top charging coke, the fluctuation of the dry institute of selection by winnowing heat requirement also increases thereupon, therefore, in technical process of the present invention, preferably set up a hot water heat patching device and regulate control; For the burnt coke oven of side-arranged tamping, enter the dried moisture general control of stove coal in 10% left and right.
In above-mentioned processing method, preferably, the front end cloth wind group plate of the most close fluidized bed body feed end is dentation or other roughnesses, and (it is strict spination that dentation is not limited to, can also be similarly wavy etc. with dentation), the ventilation bottom outlet of front end cloth wind group plate is provided with the tuyere towards discharge end, and the tuyere on front end cloth wind group plate comprises that many rows are along the tabular tuyere of the spray orifice stagger arrangement of fluidized bed body lateral arrangement; The ventilation bottom outlet of all the other each Duan Bufeng group plates is provided with blast cap, and the afterbody of all the other each Duan Bufeng group plates is equipped with discharge gate;
The ventilation side opening place of described cloth wind side plate is provided with the crosswind mouth directly over cloth wind base plate; Described cloth wind side plate extends to the front end of the end cloth wind group plate of the most close fluidized bed body discharge end from fluidized bed body feed end; Described cloth wind side plate tilts from described body skin two side direction cloth wind base plates, arranges that many rows are along the wavy crosswind mouth of fluidized bed body longitudinal arrangement on described cloth wind side plate, and neighbouring two rows' the mutual stagger arrangement of wavy crosswind mouth stepped.Cloth wind side plate by preferred setting can make the fluidizing fluid-bed eddy flow fluidisation that realizes, and realizes better the function of dried material.And in preferred scheme, cloth wind side plate extends to the front end of the end cloth wind group plate of the most close bed body discharge end from bed body feed end, the both sides that are end cloth wind group plate do not arrange cloth wind side plate, and this is just for realizing better varigrained selection by winnowing fractional separation, therefore the different positions at air distribution plate has adopted different structure settings.
In above-mentioned processing method, after described granule materials enters into fluidized-bed cavity volume, concrete selection by winnowing damping operating process preferably includes: described granule materials is first under the airflow function of first segmentation air compartment, above front end cloth wind group plate, present eddy flow fluidized state, the air-flow of first segmentation air compartment is mainly to carry out preliminarily dried to just entering the granule materials of fluidized-bed cavity, subsequently, granule materials after preliminarily dried starts to progress into second segmentation air compartment top, and again present eddy flow fluidized state above the second cloth wind group plate, the air-flow of second segmentation air compartment is not only further dried granule materials, and because eddy flow rheomorphism is concentrated the granule materials after preliminarily dried to the middle part of fluidized-bed cavity volume, granule materials after the fluidisation of middle part starts to carry out hierarchical classification by globule size, and undermost large coarse particles material progressively enters in the shape material discharge region, hole of the second cloth wind group plate, from the large coarse particles discharge gate of shape material discharge region, hole, discharge, follow-up other segmentation air compartments except last segmentation air compartment are further dried granule materials, realize simultaneously the middle coarse particles in granule materials is carried out to selection by winnowing fractional separation, and its coarse particles discharge gate in fluidized-bed is discharged, last segmentation air compartment top is provided with end cloth wind group plate, the both sides of end cloth wind group plate do not arrange cloth wind side plate, the granule materials that enters into last segmentation air compartment starts to be transitioned into from anterior eddy flow fluidized state the plane boiling fluidized state of afterbody, now through abundant dried fine granular materials from the fine granular materials overflow port of fluidized bed body tail end with air-flow discharged to dilatation settling pocket, through abundant dried little coarse particles material the little coarse particles discharge notch of terminad cloth wind group plate assemble and discharge, the air-flow of last segmentation air compartment not only carries out last desiccation to granule materials, and realizes remaining little coarse particles in granule materials and fine grain selection by winnowing fractional separation.
In above-mentioned processing method, preferred, described cloth wind base plate is discontinuous plane, and the end to end place between the adjacent two cloth wind group plates in middle part exists a difference of altitude, and the afterbody that is provided with the cloth wind group plate of discharge gate is arranged to the material discharge region of a del.By the material discharge region of preferred del is set, can better the material particles of different grain size scope directly be discharged to fluidized bed body at the different positions of fluidized-bed, this can reduce the selection by winnowing fractional separation pressure after follow-up dry materials.
In above-mentioned processing method, preferred, described blast cap is preferably hemispherical blast cap, and described blast cap surrounding is evenly laid with spray wind hole.The material of considering different grain size scope need to adopt different dry separate modes, the present invention has adopted the mode of the different spray of different cloth wind group plate preparation vent structure in the design of cloth wind base plate, even in the blast cap design of same structure, different cloth wind group plates also can adopt the hemispherical blast cap of different size to reach separating effect better.
In above-mentioned processing method, preferably, the end cloth wind group plate of the most close fluidized bed body discharge end is the arrowhead form of a sensing fluidized bed body discharge end, two forequarters of end cloth wind group plate are stepped progressively to tilt to middle facial planes, and the material discharge region of end cloth wind group plate middle part and afterbody is plane.The aft mounted discharge gate of described end cloth wind group plate is the little coarse particles discharge notch of one " > " shape, " > " shape both wing portions of described little coarse particles discharge notch is arranged to the stepped chute tilting to center intersection, in the vertical panel of stepped chute, offer the little coarse particles drainage conduit of open communication to of Pen Fengkong， center intersection.By structure and the shape of end cloth wind group plate are carried out to repetition test, we have determined this kind of preferred structure and shape, this not only can realize separated with little coarse particles material to the fine granular materials of afterbody, and contribute to little coarse particles material to discharge in time, avoid occurring dead angle and buildup, improve the dry separation efficiency of fluidized-bed.
In above-mentioned processing method, preferably, described body skin comprises Side fascia and lining, the coated shell cavity as fluidized bed body bellows that forms of described Side fascia and lining, described bellows comprise front bellows and the crosswind case being connected with segmentation air compartment, on the lining of described front bellows, offer the front wall tuyere that is communicated to described fluidized-bed cavity volume, on the lining of described crosswind case, offer the side wall tuyere that is communicated to described fluidized-bed cavity volume; Described front wall tuyere is positioned at the mid-way of described lining bottom, and described side wall tuyere is positioned at the trough place that cloth wind side plate is gone up the wavy crosswind mouth of row most.
In above-mentioned processing method, preferred, described fluidized-bed cavity volume is mainly comprised of front cavity and rear chamber, and front cavity and rear chamber are opened by a cavity baffle for separating, and the cross section of front cavity and rear chamber is all class fusiformis; The front opening of front cavity is established feeding machine, and the top of front cavity offers front-seat gas port.Described fluidized-bed cavity volume also can comprise preferably a dilatation settling pocket, and the rear wall plate of described rear chamber is separated rear chamber and dilatation settling pocket; The top of rear wall plate is provided with the side pipe that leads to dilatation settling pocket, and the bottom of rear wall plate offers the fine granular materials overflow port that leads to dilatation settling pocket, and fine granular materials overflow port place is provided with overflow height setting device; The top of dilatation settling pocket offers rear exhaust port.
In above-mentioned processing method, preferably, the discharge gate of described full boiling selection by winnowing drying fluidized-bed comprises coarse particles material discharge gate and fine particle material discharge gate, described coarse particles material discharge gate is discharged transfer roller by coarse particles material and is communicated with pulverizer, the discharge port of described pulverizer and fine particle material discharge gate are all communicated with mixing machine by e Foerderanlage, and described mixing machine is connected to former standby coal endless belt conveyor by e Foerderanlage; Former standby coal endless belt conveyor is connected to many material mixers by entering stove coal transfer roller, the opening for feed place of many material mixers is also connected with biological mud e Foerderanlage, dedusting ash e Foerderanlage and coke tar refuse e Foerderanlage, the discharge port of many material mixers is connected to molding coal machine, and the discharge port of molding coal machine connects moulded coal transfer roller to former standby coal endless belt conveyor.
In above-mentioned processing method, preferred, described gas sampling treatment system comprises gas exhaust duct, sack cleaner, purified gas pipeline and the dehumidifier being connected successively with fluidized bed body venting port, and the air outlet of dehumidifier is connected to described hot gas recovery channel; The dedusting ash discharge gate of described sack cleaner is connected to many material mixers by described dedusting ash e Foerderanlage.
Compared with prior art, the invention has the advantages that:
1. processing method of the present invention can indirect utilization flue gases of cock oven waste heat, and by adopting air water hot tube heat exchanger that flue gases of cock oven waste heat is replaced as to hot water, and the pipeline of hot water is carried and not limited by place, flexible; Can make full use of coke oven flue place around, more be conducive to adapt to the transformation that built coke-oven plant carries out energy-saving and emission-reduction technology innovation project.If when hot water water temperature does not reach the dry design requirements of follow-up coking mixed coal appropriateness selection by winnowing, hot water heat patching device is also being set in preferred technical process, and can adopting Low Pressure Gas Network hot water boiler thermal source as a supplement.
2. in processing method of the present invention, also adopt aqueous vapor hot tube heat exchanger, can further the heat in hot water be replaced in hot gas closed circuit circulatory system, the selection by winnowing that realizes follow-up full boiling selection by winnowing drying fluidized-bed is dry.
3. by adopting the supporting full boiling selection by winnowing drying fluidized-bed of the present invention, can reach simultaneously coking mixed coal is carried out to selection by winnowing and drying purpose, not only simple in structure, invest little, and easy and simple to handle.The air-flow fluidization principle of boiling selection by winnowing drying fluidized-bed mainly entirely: the structure design that has adopted sectional type on cloth wind base plate, be that end cloth wind group plate boiling cyclone fluidized bed bed structure before passes two vortex gas-flows of rear generation in lower stream of airflow, wherein the air-flow through cloth wind base plate is mainly by tuyere and blast cap, to be sprayed behind main air chamber from segmentation air compartment, a small amount of gas is sprayed by the front wall tuyere at front bellows place, be subject to (tabular) tuyere aperture on front end cloth wind group plate towards the effect of material discharging end structure, air-flow through cloth wind base plate is flowed to discharge end by feed end, air-flow through cloth wind side plate is sprayed by wavy crosswind mouth gas orifice behind crosswind chamber airflow pressure adjustment doors and crosswind chamber from segmentation air compartment, because both sides cloth wind side plate is arranged symmetrically with, the air-flow of both sides ejections after meeting above cloth wind base plate on lifting, be formed on the air-flow of bottom position to intermediary movements, middle upper part position to the contrary circular trace of two rotation directions of two lateral movements, through the air-flow of cloth wind base plate with synthesize the air-flow to discharge end motion by feed end of the spiral-line form that two rotation directions are contrary through the air-flow of cloth wind side plate, be eddy flow fluidized state, and the front portion of end cloth wind group plate is inverted trapezoidal shape, trapezoidal inclined-plane, both sides progressively reduces to middle facial planes approaching, and it is plane that postmedian is, and therefore at the rear portion of fluidized bed body, by eddy flow fluidized state, is transitioned into gradually plane boiling fluidized state.
4. in the preferred processing method of the present invention, by adopting sack cleaner and dehumidifier, the waste gas that can discharge full boiling selection by winnowing drying fluidized-bed carries out dedusting and dehumidifying, so that recycle selection by winnowing drying medium.In addition, when adopting the gases such as nitrogen as closed cycle drying medium, the drying medium that can avoid adopting ambient air to bring greatly because of air humidity varies and oxygen level dries and the problems such as explosion-proof; From our experiment, after the dried waste gas of selection by winnowing is carried out to dedusting and dehumidification treatments, the use of nitrogen closed cycle is feasible.
5. in the preferred processing method of the present invention, by adopting pulverizer to coordinate full boiling selection by winnowing drying fluidized-bed, selection by winnowing coarse particles coal out further can be pulverized; Then by mixing machine, selection by winnowing is dried out≤pulverizing coal charge after 3mm fine-particle coal and pulverizer are pulverized mixes.Because the coal of≤3mm granularity no longer enters to pulverize, so pulverizing problem of crossing of do not exist≤3mm granularity coal charge, reduced the granularity share of < below 0.5, changed the granularity share ratio that enters stove coal, avoid ature of coal segregation, made it to reach the coal preparation technology requirement of coking mixed coal.In addition, because the general > 3mm of the size composition granularity of coking mixed coal accounts for 40%, ≤ 3mm granularity accounts for 60%, selection by winnowing after separating respectively accounts for 50% left and right, because≤the coal charge of 3mm granularity does not need to pulverize in technical process of the present invention again, so the power consumption of pulverizer is than the power consumption power saving of traditional technology more than 50%.
6. because technical process of the present invention has been carried out appropriate being dried to coking mixed coal, its moisture controlled, after 7%, improves its bulk density, the corresponding output that improves coke oven.Due to coking mixed coal, to have carried out moisture appropriateness dry equally, coal gas consumption when this has also reduced coking, thus reach the effect of energy-saving and emission-reduction, also reduced the steam consumption quantity that the ammonia still process of approximately 1/3 ammonia vol and this part ammoniacal liquor is used simultaneously.
7. in the preferred technical process of the present invention, finally adopt the pelletizing systems such as molding coal machine that coke tar refuse, dedusting ash, biological mud and part are entered to stove coal and mix pelletizing, make it to become part and enter stove coking coal, the comprehensive utilization that this has further realized refuse (coke tar refuse, dedusting ash, biological mud etc. all belong to the waste material in traditional technology), is conducive to energy-conserving and environment-protective.
In sum, whole process optimization of the present invention, rationally, can really realize the indirect utilization of the waste heat of flue gases of cock oven, and system device fault is few, and level of automation is high, and pollutant emission is few, can reach the object of energy-saving and emission-reduction completely.Technique of the present invention can adapt to the energy-conserving and emission-cutting technology transformation of newly-built or built coke-oven plant's coking mixed coal completely, it not only can improve the standby coal condition of coking charge coal greatly, coke quality and output are promoted to some extent, and can not affect under the condition of coke quality, suitably improve weak caking coal and coordinate share, the nervous problem of resource of alleviating the current coking coal of China, is with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is the front view of fluidizing fluid-bed bed structure in the embodiment of the present invention.
Fig. 2 is the left view of fluidizing fluid-bed bed structure in the embodiment of the present invention.
Fig. 3 is the partial enlarged drawing of I frame choosing place in Fig. 1.
Fig. 4 is the sectional view at A-A place in Fig. 1.
Fig. 5 is the sectional view at B-B place in Fig. 1.
Fig. 6 is the sectional view at C-C place in Fig. 1.
Fig. 7 is the sectional view at D-D place in Fig. 1.
Fig. 8 is the sectional view at E-E place in Fig. 1.
Fig. 9 adapts in the embodiment of the present invention in built coke-oven plant coking coal preparation technique to carry out the process system of UTILIZATION OF VESIDUAL HEAT IN and the structural representation of technical process.
Marginal data:
1, body skin; 2, segmentation air compartment; 3, air distribution plate; 4, front cavity; 5, rear chamber; 6, feeding machine; 7, front-seat gas port; 8, front exhaust air-quantity adjusting valve; 9, cavity dividing plate; 10, rear wall plate; 11, dilatation settling pocket; 12, side pipe; 13, airflow pressure adjustment doors; 14, fine granular materials overflow port; 15, overflow height setting device; 16, rear exhaust port; 17, bunker for collecting; 18, wavy crosswind mouth; 19, tabular tuyere; 20, main air chamber; 21, crosswind chamber; 22, front bellows; 23, front end cloth wind group plate; 24, front wall tuyere; 25, crosswind case; 26, cloth wind side plate; 27, side wall tuyere; 28, blast cap; 29, large coarse particles discharge gate; 30, large coarse particles drainage conduit; 31, middle coarse particles discharge gate; 32, middle coarse particles drainage conduit; 33, little coarse particles discharge notch; 34, little coarse particles drainage conduit; 35, " > " shape both wing portions; 36, stepped appearance discharge chute; 37, crosswind chamber airflow pressure adjustment doors; 38, the second cloth wind group plate; 39, the 3rd cloth wind group plate; 40, end cloth wind group plate; 41, cloth wind base plate; 42, the selection by winnowing drying fluidized-bed that entirely seethes with excitement; 43, gas exhaust duct; 44, sack cleaner; 45, purified gas pipeline; 46, dehumidifier; 47, purify except moisture induced draft fan; 48, intake stack; 49, former standby coal endless belt conveyor; 50, moulded coal transfer roller; 51, coke oven flue collector; 52, flue valve; 53, coke oven chimney; 54, bypass flue; 55, air water hot tube heat exchanger; 56, flue gas fan; 57, hot water inlet pipe road; 58, hot water boiler service pump; 59, Low Pressure Gas Network hot water boiler; 60, air supply duct; 61, hot water boiler gas blower; 62, gas pipeline; 63, hot water boiler induced draft fan; 64, hot water boiler chimney; 65, delivery pipeline; 66, hot water backwater's pipeline; 67, backwater transportation water pump; 68, aqueous vapor hot tube heat exchanger; 69, hot nitrogen intake ducting; 70, hot nitrogen gas blower; 71, coarse particles material is discharged transfer roller; 72, pulverizer; 73, fine particle is discharged transfer roller; 74, mixing machine; 75, enter stove coal transfer roller; 76, biological mud e Foerderanlage; 77, dedusting ash e Foerderanlage; 78, many material mixers; 79, coke tar refuse e Foerderanlage; 80, molding coal machine; 81, former standby coal pulverizer machine; 82, the dry coal endless belt conveyor that mixes.
Embodiment
Below in conjunction with Figure of description, the invention will be further described with concrete preferred embodiment, but protection domain not thereby limiting the invention.
The hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat, this hot gas flow circular form selection by winnowing coal humidifying technology is mainly to carry out in the full boiling selection by winnowing drying fluidized-bed as shown in Fig. 1～Fig. 8 and hot waste gas bootstrap system.
As shown in Fig. 1～Fig. 8, in the present embodiment, can carry out selection by winnowing and dry full boiling selection by winnowing drying fluidized-bed 42 simultaneously and comprise body skin 1, four segmentation air compartments 2 and air distribution plates 3; The coated fluidized-bed cavity volume that forms of body skin 1 and air distribution plate 3.This fluidized-bed cavity volume is mainly comprised of front cavity 4 and rear chamber 5, and front cavity 4 is separated by a cavity dividing plate 9 with rear chamber 5.As shown in Figure 2, the cross section of front cavity 4 and rear chamber 5 is all class fusiformis (be that stage casing is wider rectangular, narrow gradually at two ends), and upper, middle and lower shows as trapezoidal, rectangle and inverted trapezoidal shape successively.
As shown in Figure 1, the feed end of 42 bodies of full boiling selection by winnowing drying fluidized-bed in the present embodiment (being called for short " bed body ") is arranged on the front end of front cavity 4, the front opening of front cavity 4 is established feeding machine 6, feeding machine 6 is connected with the former standby coal endless belt conveyor 49 of charging, the top of front cavity 4 offers front-seat gas port 7, front exhaust air-quantity adjusting valve 8 is established in front-seat gas port 7 tops, and waste gas anterior in fluidized-bed cavity volume can be discharged by the past venting port 7.In the present embodiment, the rear wall plate 10 of rear chamber 5 is vertical " Z " font (comprise top vertically section, middle part tilting section and bottom vertical section), and this rear wall plate 10 is separated rear chamber 5 and the dilatation settling pocket 11 of fluidized-bed.Vertical section both sides, top for rear wall plate 10 are provided with side pipe 12 and lead to dilatation settling pocket 11, establish venetian blind type airflow pressure adjustment doors 13 on side pipe 12; The vertical section middle part, bottom of rear wall plate 10 offers fine granular materials overflow port 14 and leads to dilatation settling pocket 11, and fine granular materials overflow port 14 places are provided with overflow height setting device 15.The top of dilatation settling pocket 11 offers rear exhaust port 16.
As shown in Figure 1, Figure 3 and Figure 4, in the present embodiment, the air distribution plate 3 of bed body is arranged at the below of fluidized-bed cavity volume, and the below of air distribution plate 3 is communicated to segmentation air compartment 2.(particularly from cross section) in general, air distribution plate 3 is groove shape (inverted trapezoidal) and tilts to discharge end from the feed end of fluidized bed body, and it is mainly comprised of the cloth wind side plate 26 of middle cloth wind base plate 41 and both sides.From thin portion, the cloth wind base plate 41 in the present embodiment is mainly by being formed by connecting before and after four sections of cloth wind group plates; The below correspondence of each section of cloth wind group plate arranges a segmentation air compartment 2.
An important feature of the present embodiment bed structure is that each Duan Bufeng group plate has different structures and shape, to realize the multistage pneumatic separation of granule materials and functions/drying simultaneously.Concrete, the front end cloth wind group plate 23 of the most close bed body feed end is dentation, on front end cloth wind group plate 23, comprise that many rows are along the tabular tuyere 19 of bed body lateral arrangement and spout stagger arrangement, tabular tuyere 19 is communicated with segmentation air compartment 2 by the ventilation bottom outlet of offering on front end cloth wind group plate 23, and the aperture of tabular tuyere 19 is towards the discharge end of bed body; After front end cloth wind group plate 23, connect successively the second cloth wind group plate 38, the 3rd cloth wind group plate 39 and end cloth wind group plate 40, there is a difference of altitude (referring to Fig. 3) in the end to end place between the adjacent two cloth wind group plates in middle part, therefore the last cloth wind base plate 41 forming is a discontinuous plane.On the second cloth wind group plate 38, the 3rd cloth wind group plate 39 and the end cloth wind group plate 40 of the present embodiment, be laid with aperture ventilation bottom outlet upward, it is hemispherical that the top of these ventilation bottom outlets is equiped with blast cap 28(), blast cap 28 surroundings are evenly laid with spray wind hole (referring to Fig. 6～Fig. 8).In addition, the afterbody of the second cloth wind group plate 38, the 3rd cloth wind group plate 39 and end cloth wind group plate 40 is all arranged to the shape material discharge region, hole of a del (from Fig. 1 and Fig. 3), and each is cheated and in shape material discharge region, is respectively equipped with large coarse particles discharge gate 29, middle coarse particles discharge gate 31 and little coarse particles discharge notch 33; Large coarse particles discharge gate 29, middle coarse particles discharge gate 31 and little coarse particles discharge notch 33 are communicated with large coarse particles drainage conduit 30, middle coarse particles drainage conduit 32 and little coarse particles drainage conduit 34 respectively.Large coarse particles drainage conduit 30, middle coarse particles drainage conduit 32 and little coarse particles drainage conduit 34 are all led to outside segmentation air compartment 2 and are discharged transfer roller with outside coarse particles coal and be connected.As shown in Figure 1, Figure 3 and Figure 4, end cloth wind group plate 40 is the arrowhead form (from the vertical view of Fig. 4) of a sensing bed body discharge end, the both sides front end of end cloth wind group plate 40 is stepped progressively to tilt to tail plane, and the middle part of end cloth wind group plate 40 and afterbody are plane (a similar plane arrowhead form); The aft mounted little coarse particles discharge notch 33 of end cloth wind group plate 40 is one " > " shape (being the top area of arrow in Fig. 4), " > " shape both wing portions 35 of this little coarse particles discharge notch 33 is arranged to the stepped appearance discharge chute 36 tilting to center intersection, in the vertical panel of stepped appearance discharge chute 36, offer the spray wind hole being communicated with segmentation air compartment 2, each blanking port of little coarse particles discharge notch 33 is all communicated to little coarse particles drainage conduit 34.
As shown in Figure 1, Figure 3 and Figure 4, in the present embodiment, the cloth wind side plate 26 of bed body extends to the front end (both sides that are end cloth wind group plate 40 do not arrange cloth wind side plate 26) of the end cloth wind group plate 40 of the most close bed body discharge end from bed body feed end.Cloth wind side plate 26 tilts from 1 liang of side direction cloth wind base plate of body skin, on cloth wind side plate 26, arrange that many rows are along the wavy crosswind mouth 18 of bed body longitudinal arrangement, the mutual stagger arrangement of wavy crosswind mouth 18 of adjacent two rows is also stepped, and the trough that the spout of upper row's wavy crosswind mouth 18 is arranged on the wave surface of the wavy crosswind mouth 18 of lower row is sentenced and is reached stagger arrangement, and the spout of wavy crosswind mouth 18 is opened in (referring to Fig. 5, Fig. 6 and Fig. 7) in stair-stepping vertical face.On cloth wind side plate 26, the middle part of bed body (is pointed to) in the aperture of wavy crosswind mouth 18 directly over cloth wind base plate 41.
As shown in Figure 1 to 4, because being equipped with after cloth wind side plate 26(combines, first, second and third cloth wind group plate both sides are inverted trapezoidal shape), and leading portion is mainly realizes eddy flow fluidized state, therefore three segmentation air compartments 2 of leading portion of the present embodiment bed body are all separated into the main air chamber 20 that is positioned at middle part and the crosswind chamber 21 that is positioned at both sides, main air chamber 20 is communicated with the ventilation bottom outlet of offering on cloth wind base plate, and crosswind chamber 21 is communicated with the ventilation side opening of offering on cloth wind side plate.The body skin 1 of the present embodiment bed body comprises Side fascia and lining, the coated shell cavity as fluidized bed body bellows (lining inner side is provided with dismountable abrasion resistant corrosion resistant interior lining panel) that forms of Side fascia and lining, these bellows comprise the front bellows 22 that are connected with main air chamber 20 and the crosswind case 25 being connected with crosswind chamber 21, and the quantity of crosswind case 25 can arrange a plurality of.On the lining of front bellows 22, offer the front wall tuyere 24 that is communicated to fluidized-bed cavity volume, on the lining of crosswind case 25, offer the side wall tuyere 27 that is communicated to fluidized-bed cavity volume; Front wall tuyere 24 is positioned at the mid-way of lining bottom, and side wall tuyere 27 is positioned at lining bottom and at the trough place (referring to Fig. 3～Fig. 7) of the wavy crosswind mouth 18 of upper row of cloth wind side plate 26.Crosswind chamber airflow pressure adjustment doors 37 is established in the bottom of crosswind chamber 21, with the airflow pressure of regulation bed body forward spin flow fluidisation.
In the present embodiment, the principle of work of full boiling selection by winnowing drying fluidized-bed 42 is: first, need to carry out selection by winnowing classification and dry granules material from former standby coal endless belt conveyor 49 interceptions first the feeding machine 6 by bed body feed end enter into fluidized-bed cavity volume cavity 4, and under the airflow function of first segmentation air compartment, above front end cloth wind group plate 23, present eddy flow fluidized state, the air-flow of first segmentation air compartment is mainly to carry out preliminarily dried to just entering the granule materials of fluidized-bed cavity, subsequently, granule materials after preliminarily dried starts to progress into second segmentation air compartment top, and again present eddy flow fluidized state above the second cloth wind group plate 38, the air-flow of second segmentation air compartment is not only further dried granule materials, and because eddy flow rheomorphism is concentrated the granule materials after preliminarily dried to the middle part of fluidized-bed cavity volume, granule materials after the fluidisation of middle part starts to carry out hierarchical classification by globule size, and undermost large coarse particles material progressively enters in the shape material discharge region, hole of del of the second cloth wind group plate 38, from the large coarse particles discharge gate 29 of shape material discharge region, hole, discharge, therefore, the air-flow of second segmentation air compartment also plays the effect of the large coarse particles in granule materials being carried out to selection by winnowing fractional separation, and the effect of the 3rd segmentation air compartment is similar to second segmentation air compartment with function, the shape of the 3rd cloth wind group plate 39 and structure also with shape and the structural similitude of the second cloth wind group plate 38, due to the most of bed body of discharging after the selection by winnowing fractional separation effect of second segmentation air compartment of the large coarse particles (>=13mm) in material, therefore, the 3rd segmentation air compartment is except being further dried granule materials, realize simultaneously the middle coarse particles in granule materials carried out to selection by winnowing fractional separation, make its by coarse particles (13mm～6mm) discharge gate 31 discharge, the effect of the 4th segmentation air compartment and the effect of aforementioned each segmentation air compartment are slightly different, also there is some difference for the structure of end cloth wind group plate 40 wherein and the structure of shape and first three section of cloth wind group plate and shape, because the both sides of end cloth wind group plate 40 do not arrange cloth wind side plate 26, therefore the granule materials that enters into the 4th segmentation air compartment starts to be transitioned into from anterior eddy flow fluidized state the plane boiling fluidized state of afterbody, now through abundant dried fine granular materials (≤3mm) can be from the fine granular materials overflow port 14 of bed body tail end with air-flow discharged to dilatation settling pocket 11, the abundant dried little coarse particles material (6mm～> 3mm) of the warp little coarse particles discharge notch 33 of terminad cloth wind group plate 40 is assembled and discharges, the structure of end cloth wind group plate 40, shape design is just in order to realize better the plane boiling fluidisation of tailing, realize it and from eddy flow, be streamed to the smooth transition of plane boiling fluidisation, the structure of the medium and small coarse particles discharge of the present embodiment notch 33 and the design of shape are in order to realize better tailing to gathering and the discharge of little coarse particles discharge notch 33, preventing discharge dead angle and tailing accumulates, visible, the air-flow of the 4th segmentation air compartment not only plays the final drying effect to granule materials, but also play remaining little coarse particles in granule materials and the effect of fine grain selection by winnowing fractional separation.In addition, with regard to walking always of air-flow in fluidized-bed cavity volume, see, enter waste gas front-seat gas port 7 discharges of cavity 4 in the past of fluidized-bed cavity volume front portion, the waste gas that enters into fluidized-bed cavity volume rear chamber 5 can enter into dilatation settling pocket 11 by the side pipe 12 on rear wall plate 10, with further dilatation sedimentation meal dirt, to bottom collection bucket 17, enter rear exhaust port 16 discharges that the waste gas in dilatation settling pocket 11 finally can arrange from its top; And by fine granular materials overflow port 14, enter into the air-flow of dilatation settling pocket 11, the subparticle wherein carrying and meal dirt finally also dilatation be settled down in the collection bucket 17 of bottom, remaining waste gas is discharged from the rear exhaust port 16 at its top equally.
The coarse particles material discharge gate of the full boiling selection by winnowing drying fluidized-bed 42 of the present embodiment (containing large coarse particles discharge gate 29, middle coarse particles discharge gate 31 and little coarse particles discharge notch 33) is discharged transfer roller 71 by coarse particles material and is communicated with pulverizer 72, the discharge port of pulverizer 72 and fine particle material discharge gate are all discharged transfer roller 73 by fine particle and are communicated with mixing machine 74, and mixing machine 74 discharge ports connect the dry coal endless belt conveyor 82 that mixes to former standby coal endless belt conveyor 49.Enter stove coal transfer roller 75 and be connected to many material mixers 78, the opening for feed place of many material mixers 78 is also connected with biological mud e Foerderanlage 76, dedusting ash e Foerderanlage 77 and coke tar refuse e Foerderanlage 79, the discharge port of many material mixers 78 is connected to molding coal machine 80, and the discharge port of molding coal machine 80 connects moulded coal transfer roller 50 to former standby coal endless belt conveyor 49.
As shown in Figure 9, the hot waste gas bootstrap system in the present embodiment comprises hot gas closed circuit circulatory system and a residual neat recovering system to 68 heat supplies of aqueous vapor hot tube heat exchanger.Hot gas closed circuit circulatory system comprises aqueous vapor hot tube heat exchanger 68, hot nitrogen intake ducting 69, hot nitrogen gas blower 70, the intake stack 48 from aqueous vapor hot tube heat exchanger 68, exported and the hot nitrogen recovery channel that is back to aqueous vapor hot tube heat exchanger 68, hot nitrogen intake ducting 69 is communicated to the segmentation air compartment 2 of above-mentioned full boiling selection by winnowing drying fluidized-bed 42, and the entrance end of hot nitrogen recovery channel is communicated to the gas sampling treatment system of above-mentioned full boiling selection by winnowing drying fluidized-bed 42.This residual neat recovering system comprises air water hot tube heat exchanger 55, the hot water inlet pipe road 57 of exporting from air water hot tube heat exchanger 55 and the hot water backwater's pipeline 66 that is back to air water hot tube heat exchanger 55, and hot water backwater's pipeline 66 is provided with backwater transportation water pump 67; The entrance end of the exit end in hot water inlet pipe road 57 and hot water backwater's pipeline 66 is all communicated to aqueous vapor hot tube heat exchanger 68.The residual neat recovering system of the present embodiment also comprises a flue gases of cock oven bypass flue 54 to 55 heat supplies of air water hot tube heat exchanger, the inlet mouth of this flue gases of cock oven bypass flue 54 and air outlet are all arranged on coke oven flue collector 51, and the coke oven flue collector 51 between inlet mouth and air outlet is provided with flue valve 52, flue gases of cock oven bypass flue 54 is provided with flue gas fan 56, and 51 of coke oven flue collectors lead to coke oven chimney 53.The hot water inlet pipe road 57 of the present embodiment is provided with hot water heat patching device, and this hot water heat patching device comprises hot water boiler service pump 58, Low Pressure Gas Network hot water boiler 59 and hot water boiler gas emission device.The air that the fuel gas source of Low Pressure Gas Network hot water boiler 59 is sent into from coke oven self produced gas and hot water boiler gas blower 61.Coke oven self produced gas is delivered to Low Pressure Gas Network hot water boiler 59 by gas pipeline 62, and the air that hot water boiler gas blower 61 is sent into is delivered to Low Pressure Gas Network hot water boiler 59 and coordinated burning with coke oven self produced gas by air supply duct 60.Hot water boiler gas emission device comprises hot water boiler induced draft fan 63 and hot water boiler chimney 64, to hot water boiler tail gas is arranged in time.Water outlet after the heating of hot water heat patching device is connected with aqueous vapor hot tube heat exchanger 68 by low pressure hot water transport pipe 65 again.
Whole hot gas flow circular form selection by winnowing coal humidifying technology comprises the following steps: first, need to carry out selection by winnowing classification and dry granules material from former standby coal endless belt conveyor 49 interceptions, by fluidized bed body feed end, enter into fluidized-bed cavity volume and carry out selection by winnowing damping, under the airflow function of each segmentation air compartment 2, granule materials presents eddy flow fluidized state above cloth wind base plate 41, the high temperature gas medium of each segmentation air compartment 2 (hot nitrogen) is derived from the hot nitrogen intake ducting 69 of hot gas closed circuit circulatory system, the gas sampling treatment system that the air-flow that enters into fluidized-bed cavity volume by segmentation air compartment 2 heats after damping by the selection by winnowing drying fluidized-bed 42 that entirely seethes with excitement granule materials enters into hot gas recovery channel, again via hot nitrogen recovery channel, intake stack 48 is back in aqueous vapor hot tube heat exchanger 68, so move in circles.The gas sampling treatment system of the present embodiment comprises gas exhaust duct 43, sack cleaner 44, purified gas pipeline 45 and the dehumidifier 46 being connected successively with full boiling selection by winnowing drying fluidized-bed 42 venting ports, the air outlet of dehumidifier 46 is connected to hot nitrogen recovery channel, is also provided with and purifies except moisture induced draft fan 47 on hot nitrogen recovery channel; The dedusting ash discharge gate of sack cleaner 44 is connected to material mixer more than one 78 by dedusting ash e Foerderanlage 77.
Utilize residual neat recovering system to comprise to the method for aqueous vapor hot tube heat exchanger 68 heat supplies: by coke oven flue collector 51, flue gases of cock oven in flue gases of cock oven bypass flue 54 is first to 55 heat supplies of air water hot tube heat exchanger, low temperature flue gases of cock oven after 55 heat exchange of air water hot tube heat exchanger is back on coke oven flue collector 51 by the air outlet of flue gases of cock oven bypass flue 54, high-temperature-hot-water after 55 heat absorptions of air water hot tube heat exchanger enters the hot water inlet pipe road 57 of flowing through successively, hot water heat patching device, low pressure hot water transport pipe 65, aqueous vapor hot tube heat exchanger 68, hot water backwater's pipeline 66, and be finally back in air water hot tube heat exchanger 55.
Claims (10)
1. the hot gas flow circular form selection by winnowing coal humidifying technology of an indirect utilization flue gases of cock oven waste heat, this hot gas flow circular form selection by winnowing coal humidifying technology is mainly to carry out in full boiling selection by winnowing drying fluidized-bed and hot waste gas bootstrap system, described full boiling selection by winnowing drying fluidized-bed comprises body skin and air distribution plate, air distribution plate is groove shape, the coated fluidized-bed cavity volume that forms of described body skin and air distribution plate; Described air distribution plate is mainly comprised of the cloth wind side plate of middle cloth wind base plate and both sides, on cloth wind base plate, offer the ventilation bottom outlet being connected with the segmentation air compartment of described full boiling selection by winnowing drying fluidized-bed, on described cloth wind side plate, offer the ventilation side opening being connected with the segmentation air compartment of described full boiling selection by winnowing drying fluidized-bed, described cloth wind base plate is to be formed by connecting before and after the cloth wind group plate by multistage; Described hot waste gas bootstrap system comprises hot gas closed circuit circulatory system and residual neat recovering system; Described hot gas closed circuit circulatory system comprises aqueous vapor hot tube heat exchanger, hot gas intake ducting, the hot gas gas blower from aqueous vapor hot tube heat exchanger, exported and is back to the hot gas recovery channel of aqueous vapor hot tube heat exchanger, described hot gas intake ducting is communicated to described segmentation air compartment, and the entrance end of described hot gas recovery channel is communicated to the gas sampling treatment system of described full boiling selection by winnowing drying fluidized-bed; Described residual neat recovering system utilizes flue gases of cock oven waste heat to the heat supply of described aqueous vapor hot tube heat exchanger;
This hot gas flow circular form selection by winnowing coal humidifying technology comprises the following steps: first, residual neat recovering system utilizes high-temperature-hot-water that flue gases of cock oven waste heat changes out and to the aqueous vapor hot tube heat exchanger heat supply of described hot gas closed circuit circulatory system, aqueous vapor hot tube heat exchanger is transformed into the heat of high-temperature-hot-water in the gaseous media in hot gas closed circuit circulatory system after heat exchange, and the high temperature gas medium absorbing after heat is transported to the segmentation air compartment of described full boiling selection by winnowing drying fluidized-bed by the hot gas intake ducting in hot gas closed circuit circulatory system, meanwhile, need to carry out selection by winnowing classification and dry granules material and enter into fluidized-bed cavity volume by full boiling selection by winnowing drying fluidized-bed bed body feed end, the high temperature gas medium that now enters into each segmentation air compartment carries out selection by winnowing classification and dry through air distribution plate to granule materials, granule materials presents eddy flow fluidized state above air distribution plate, the high-temperature gas that is entered into fluidized-bed cavity volume by segmentation air compartment heats after damping and selection by winnowing classification granule materials, by the gas sampling treatment system of the selection by winnowing drying fluidized-bed that entirely seethes with excitement, entered into the hot gas recovery channel of hot gas closed circuit circulatory system, via hot gas recovery channel, be back in aqueous vapor hot tube heat exchanger again, so move in circles.
2. the hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat according to claim 1, is characterized in that:
Described residual neat recovering system comprises air water hot tube heat exchanger, from the hot water inlet pipe road of air water hot tube heat exchanger output be back to hot water backwater's pipeline of air water hot tube heat exchanger, the exit end in described hot water inlet pipe road and the entrance end of hot water backwater's pipeline are all communicated to described aqueous vapor hot tube heat exchanger; Described residual neat recovering system also comprises a flue gases of cock oven bypass flue to the heat supply of described air water hot tube heat exchanger, the inlet mouth of this flue gases of cock oven bypass flue and air outlet are all arranged on coke oven flue collector, and the coke oven flue collector between inlet mouth and air outlet is provided with flue valve, and flue gases of cock oven bypass flue is provided with flue gas fan;
Described residual neat recovering system utilizes flue gases of cock oven waste heat to comprise to the method for described aqueous vapor hot tube heat exchanger heat supply: by coke oven flue collector, flue gases of cock oven in flue gases of cock oven bypass flue carries out heat supply to the hot water in described air water hot tube heat exchanger, low temperature flue gases of cock oven after the heat exchange of air water hot tube heat exchanger continues to be back on coke oven flue collector by the air outlet of flue gases of cock oven bypass flue, high-temperature-hot-water after the heat absorption of air water hot tube heat exchanger enters the hot water inlet pipe road of flowing through successively, aqueous vapor hot tube heat exchanger, hot water backwater's pipeline, and be finally back in air water hot tube heat exchanger.
3. the hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat according to claim 1 and 2, it is characterized in that: described hot water inlet pipe is also provided with hot water heat patching device on road, described hot water heat patching device comprises hot water boiler service pump, Low Pressure Gas Network hot water boiler and hot water boiler gas emission device, the air that the fuel gas source of described Low Pressure Gas Network hot water boiler is sent into from coke oven self produced gas and gas blower; Now through the high-temperature-hot-water after air water hot tube heat exchanger heat absorption flow through successively hot water inlet pipe road, hot water heat patching device, delivery pipeline, aqueous vapor hot tube heat exchanger, hot water backwater's pipeline, and be finally back in air water hot tube heat exchanger.
4. according to the hot gas flow circular form selection by winnowing coal humidifying technology of the indirect utilization flue gases of cock oven waste heat described in any one in claim 1～3, it is characterized in that: the front end cloth wind group plate of the most close fluidized bed body feed end is dentation or other roughnesses, the ventilation bottom outlet of front end cloth wind group plate is provided with the tuyere towards discharge end, and the tuyere on front end cloth wind group plate comprises that many rows are along the tabular tuyere of the spray orifice stagger arrangement of fluidized bed body lateral arrangement; The ventilation bottom outlet of all the other each Duan Bufeng group plates is provided with blast cap, and the afterbody of all the other each Duan Bufeng group plates is equipped with discharge gate;
The ventilation side opening place of described cloth wind side plate is provided with the crosswind mouth directly over cloth wind base plate; Described cloth wind side plate extends to the front end of the end cloth wind group plate of the most close fluidized bed body discharge end from fluidized bed body feed end; Described cloth wind side plate tilts from described body skin two side direction cloth wind base plates, arranges that many rows are along the wavy crosswind mouth of fluidized bed body longitudinal arrangement on described cloth wind side plate, and neighbouring two rows' the mutual stagger arrangement of wavy crosswind mouth stepped.
5. the hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat according to claim 4, it is characterized in that, after described granule materials enters into fluidized-bed cavity volume, concrete selection by winnowing damping operating process comprises: described granule materials is first under the airflow function of first segmentation air compartment, above front end cloth wind group plate, present eddy flow fluidized state, the air-flow of first segmentation air compartment is mainly to carry out preliminarily dried to just entering the granule materials of fluidized-bed cavity, subsequently, granule materials after preliminarily dried starts to progress into second segmentation air compartment top, and again present eddy flow fluidized state above the second cloth wind group plate, the air-flow of second segmentation air compartment is not only further dried granule materials, and because eddy flow rheomorphism is concentrated the granule materials after preliminarily dried to the middle part of fluidized-bed cavity volume, granule materials after the fluidisation of middle part starts to carry out hierarchical classification by globule size, and undermost large coarse particles material progressively enters in the shape material discharge region, hole of the second cloth wind group plate, from the large coarse particles discharge gate of shape material discharge region, hole, discharge, follow-up other segmentation air compartments except last segmentation air compartment continue granule materials to be further dried, and realize simultaneously the middle coarse particles in granule materials is carried out to selection by winnowing fractional separation, and its coarse particles discharge gate in fluidized-bed is discharged, last segmentation air compartment top is provided with end cloth wind group plate, the both sides of end cloth wind group plate do not arrange cloth wind side plate, the granule materials that enters into last segmentation air compartment starts to be transitioned into from anterior eddy flow fluidized state the plane boiling fluidized state of afterbody, now through abundant dried fine granular materials from the fine granular materials overflow port of fluidized bed body tail end with air-flow discharged to dilatation settling pocket, through abundant dried little coarse particles material the little coarse particles discharge notch of terminad cloth wind group plate assemble and discharge, the air-flow of last segmentation air compartment not only carries out last desiccation to granule materials, and realizes remaining little coarse particles in granule materials and fine grain selection by winnowing fractional separation.
6. according to the hot gas flow circular form selection by winnowing coal humidifying technology of the indirect utilization flue gases of cock oven waste heat described in any one in claim 1～3, it is characterized in that, described cloth wind base plate is discontinuous plane, there is a difference of altitude in the end to end place between the adjacent two cloth wind group plates in middle part, the afterbody that is provided with the cloth wind group plate of discharge gate is arranged to the material discharge region of a del; The end cloth wind group plate of the most close fluidized bed body discharge end is the arrowhead form of a sensing fluidized bed body discharge end, two forequarters of end cloth wind group plate are stepped progressively to tilt to middle facial planes, and the material discharge region of end cloth wind group plate middle part and afterbody is plane;
The aft mounted discharge gate of described end cloth wind group plate is the little coarse particles discharge notch of one " > " shape, " > " shape both wing portions of described little coarse particles discharge notch is arranged to the stepped chute tilting to center intersection, in the vertical panel of stepped chute, offer the little coarse particles drainage conduit of open communication to of Pen Fengkong， center intersection.
7. according to the hot gas flow circular form selection by winnowing coal humidifying technology of the indirect utilization flue gases of cock oven waste heat described in any one in claim 1～3, it is characterized in that, described fluidized-bed cavity volume is mainly comprised of front cavity and rear chamber, front cavity and rear chamber are opened by a cavity baffle for separating, and the cross section of front cavity and rear chamber is all class fusiformis; The front opening of front cavity is established feeding machine, and the top of front cavity offers front-seat gas port; Described fluidized-bed cavity volume also includes a dilatation settling pocket, and the rear wall plate of described rear chamber is separated rear chamber and dilatation settling pocket; The top of rear wall plate is provided with the side pipe that leads to dilatation settling pocket, and the bottom of rear wall plate offers the fine granular materials overflow port that leads to dilatation settling pocket, and fine granular materials overflow port place is provided with overflow height setting device; The top of dilatation settling pocket offers rear exhaust port.
8. the hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat according to claim 7, it is characterized in that, enter the waste gas front-seat gas port discharge of cavity in the past of fluidized-bed cavity volume front portion, the waste gas that enters into fluidized-bed cavity volume rear chamber can enter into dilatation settling pocket by the side pipe on rear wall plate, with further dilatation sedimentation meal dirt, to the collection bucket of bottom, the waste gas that enters dilatation settling pocket finally can be discharged from the rear exhaust port of its top setting; And by fine granular materials overflow port, enter into the air-flow of dilatation settling pocket, the subparticle wherein carrying and meal dirt finally also dilatation be settled down in the collection bucket of bottom, remaining waste gas is discharged from the rear exhaust port at its top equally.
9. the hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat according to claim 8, it is characterized in that, described gas sampling treatment system comprises gas exhaust duct, sack cleaner, purified gas pipeline and the dehumidifier being connected successively with fluidized bed body venting port, and the air outlet of dehumidifier is connected to described hot gas recovery channel; The dedusting ash discharge gate of described sack cleaner is connected to many material mixers by described dedusting ash e Foerderanlage.
10. the hot gas flow circular form selection by winnowing coal humidifying technology of indirect utilization flue gases of cock oven waste heat according to claim 4, it is characterized in that, the discharge gate of described full boiling selection by winnowing drying fluidized-bed comprises coarse particles material discharge gate and fine particle material discharge gate, described coarse particles material discharge gate is discharged transfer roller by coarse particles material and is communicated with pulverizer, the discharge port of described pulverizer and fine particle material discharge gate are all communicated with mixing machine by e Foerderanlage, the discharge port of described mixing machine is connected to former standby coal endless belt conveyor by the dry coal endless belt conveyor that mixes, former standby coal endless belt conveyor is connected to material mixer more than by entering stove coal transfer roller, the opening for feed place of many material mixers is also connected with biological mud e Foerderanlage, dedusting ash e Foerderanlage and coke tar refuse e Foerderanlage, the discharge port of many material mixers is connected to former standby coal endless belt conveyor by molding coal machine.
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| CN104457290A (en) * | 2014-09-24 | 2015-03-25 | 株洲火炬工业炉有限责任公司 | Gradient recycling and heat utilization device for waste heat of kiln slag of zinc volatizing kiln |
| CN107406773A (en) * | 2014-12-31 | 2017-11-28 | 太阳焦炭科技和发展有限责任公司 | Multi-modal coking is material bed |
| CN109663447A (en) * | 2019-02-21 | 2019-04-23 | 唐山市神州机械有限公司 | A kind of dry separation system and dry dressing method of the underground based on circulating current |
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| CN107406773B (en) * | 2014-12-31 | 2021-07-23 | 太阳焦炭科技和发展有限责任公司 | Multi-modal bed of coking material |
| CN109663447A (en) * | 2019-02-21 | 2019-04-23 | 唐山市神州机械有限公司 | A kind of dry separation system and dry dressing method of the underground based on circulating current |
| CN109663447B (en) * | 2019-02-21 | 2024-03-08 | 唐山神州机械集团有限公司 | Underground dry separation system and method based on circulating air flow |
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