CN205192221U - Rotary kiln sealing device - Google Patents

Abstract

Rotary kiln sealing device, including clamping ring 6, inner ring 8, outer loop 9, bearing 11 keeps off ring 12, and the 9 sets outer loops are outside inner ring 8, and bearing 11 supports and rolls between 9 and on the track of inner ring 8 and 9 formation of outer loop at inner ring 8 and outer loop, clamping ring 6 with keep off the both sides that ring 12 is located inner ring 8 and outer loop 9 respectively, clamping ring 6 with keep off ring 12 respectively with outer loop 9 fixed connection, inner ring 8, outer loop 9 form the packing box with the clamping ring and say 17 between 6, inner ring 8 with keep off the ring and have packing box way 2 22 between 12, be sealing material in the packing box way 2 22, packing box way 17. This kind of bearing of industry rotary kiln use packing box formula mechanical seal device comes the device of sealing connection rotary kiln and kiln hood cover or smoke -box, can effectively improve the sealed effect of kiln hood and kiln tail, energy saving and emission reduction.

Description

Seal of rotary kiln device

Technical field

The utility model relates to the sealing device of a kind of industrial revolution kiln hood or rotary kiln tail, particularly turns round kiln hood or the sealing and connecting device between rotary kiln tail and kiln cylinder body.

Background technology

Cement industry rotary kiln is the capital equipment of burning clinker of cement, and whether its thermal regulation is stablized, and directly affects quality and the quantity of product.From the balance that will keep technical process technological angle exactly, the proper ratio relation of air capacity, fuel quantity and inventory namely to be kept.Rotary kiln runs under condition of negative pressure, every position that there is space, air will enter formation and leak out, and especially at kiln hood and kiln tail place, leaks out and can bring a large amount of cold air into, in kiln, the stable of thermal regulation is just destroyed, furnace air also can carry material and leak, and increases the fuel consumption of kiln tail dore furnace, and increases the load of blower fan, for addressing these problems, just need to take seal of rotary kiln measure.

The sealing that current rotary kiln adopts probably has following several mode classification:

(1) by using position classification: kiln hood sealing (also known as inlet seal, the namely sealing of kiln head cover and rotary kiln joint), kiln tail sealing (also known as exit seal, the namely sealing of smoke-box and rotary kiln joint);

(2) classify by sealing means: diverting type seals, hermetic type seals; As flap sealing just belongs to diverting type sealing, the sealing of graphite block sealing cylinder formula just belongs to hermetic type sealing;

(3) by the classification of sealing direction: axial seal, radial seal; As flap sealing just belongs to axial seal, air-cylinder type sealing just belongs to radial seal;

(4) classify by seal form: flap seals, graphite block seals, and air-cylinder type seals, labyrinth sealing, and baffle-type seals; Flap sealing divides again individual layer, bilayer and three-layer sealed form, and as composite seal, two soft formula sealing, flexible sealing, multiple field sealing etc. all belongs to flap sealing.

2, existing seal of rotary kiln form

(1) flap sealing

Flap is sealed into the seal form of present stage most main flow, and because its installation and maintenance are easy, sealing property is better, and both having can be used for rotary kiln end sealing and also can be used for rotary kiln sealing, is modal seal form.For cement industry, what the sealing of its rotary kiln end all adopted is flap sealing, and the sealing of kiln tail adopts the proportion of flap sealing also larger.Other ratio using flap to seal as industries such as metallurgy, building materials, chemical industry is also larger.

(2) air-cylinder type sealing

Air-cylinder type sealing seals mainly for the production of the rotary kiln of powder grain material, the application of cement industry rotary kiln is more, because its later period maintenance is cumbersome, there are certain requirements external equipment, what present stage a lot of kiln tail employing air-cylinder type sealed has all been transformed into flap seal form in addition.

(3) graphite block sealing

Graphite block sealing can be used for the sealing of kiln tail, also can be used for kiln hood sealing, and what the sealing of old graphite block all adopted is axial seal mode, the same with air-cylinder type sealing, and because it exists certain defect, the existing unit used is few.

(4) labyrinth sealing

Labyrinth sealing is the labyrinth form that the annular baffle having polylith diameter to differ is combined into, because it is higher to the requirement of equipment itself, now application is few, and the combining form that labyrinth sealing and flap seal and applying in addition in some enterprise with the combining form that graphite block seals.

(5) baffle-type sealing

Baffle-type is sealed into seal form comparatively early, and air-cylinder type sealing comparing class seemingly, is all radial seal, and be all adopt guard seal gap, adopt weight or spring supporting unlike baffle-type sealing is general, air-cylinder type sealing adopts cylinder block to support, and baffle-type sealing is substantially superseded.

Cement industry rotary kiln needs support roller to support in running, and wheel belt or gear driven rotate.Because it is supported and its rotation characteristic by support roller, the connecting portion of rotary kiln and other process units all can have certain gap, prevents its connected process units in rotation process from wiping and hangs.

Existing several cement industry seal of rotary kiln device, all there is motion and friction in the key position due to its sealing, the radial direction produced in rotary kiln operation process and axial displacement, capital accelerates to destroy existing sealing device, through operation after a while, existing several sealing means all can not the good resolution system problem of leaking out.

Utility model content

In order to overcome the problem of the system air leakage existed in existing seal of rotary kiln device, the utility model provides a kind of bearing filler function mechanically-sealing apparatus to be tightly connected revolution kiln hood or rotary kiln tail and kiln cylinder body.

Seal of rotary kiln device, comprises pressure ring, inner ring, outer shroud, bearing, baffle ring; Exterior ring cap, outside inner ring, the track that bearings is formed between inner ring and outer shroud and in inner ring and outer shroud rolls; Pressure ring and baffle ring lay respectively at the both sides of inner ring and outer shroud, pressure ring is fixedly connected with outer shroud respectively with baffle ring, inner ring, form filler exhausting one between outer shroud and pressure ring, having filler exhausting two between inner ring and baffle ring, is encapsulant in filler exhausting two, filler exhausting one.

onthe seal of rotary kiln device stated, the inner surface of pressure ring has pressure ring flange collar, and the end face of pressure ring flange collar is corresponding with the opening of filler exhausting one.

onthe seal of rotary kiln device stated, described device also comprises connection valve orchid, and orchid is fixedly connected with pressure ring connection valve.

onthe seal of rotary kiln device stated, described device also comprisesinner ring connector drum, the outer wall of inner ring connector drum one end is fixedly connected with the inwall of inner ring.

onthe seal of rotary kiln device stated, there is cooling water channel the inside of described inner ring.

onthe seal of rotary kiln device stated, described encapsulant is graphite packing.

No matter beneficial effect: traditional seal of rotary kiln is the sealing devices such as labyrinth type, graphite block, pressing plate, stainless steel flap, novel flexible, all there is leaking out in various degree, do not accomplish to seal completely through long-term facts have proved.The Ministry of Industry and Information Technology of the existing People's Republic of China (PRC) issues HG/T20552011 " chemical industry rotary kiln design code " and General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and Standardization Administration of China and issues GB/T26281--2010 " cement rotary kiln, thermal balance, the thermal efficiency, comprehensive energy consumption computational methods ", wherein mention performance and the air leak rate of air curtain of the various sealing of existing rotary kiln especially, air leak rate of air curtain is 5% ~ 10%, average general all more than 10%.

Can reach after using novel rotary kiln sealer and stop rotary kiln end and kiln tail air leakage phenomena completely, the major technique innovative point of this novel rotary kiln sealer is as follows:

(1) water cooling is adopted

Solve rotary kiln at high temperature to sealer service life and sealing effectiveness.The temperature that rotary kiln surface has reaches about 500 degree, metal at high temperature easily creep and stress relaxation for a long time, will form irregular operation cannot seal when metal is at high temperature out of shape.Encapsulant is all generally chemical materials synthesis, at high temperature easily occurs that chemical reaction changes performance, affects sealing effectiveness and service life.In processing cooling duct, sealer inside, one end connects water inlet one end and connects delivery port, installs K-type thermocouple temperature measuring apparatus controlled cooling model discharge, make sealer safe operation in sealer.

(2) bearings is adopted

Geometric center skew can not the airtight and watertight padding exhausting of formation rule when rotating to solve rotary kiln body.Rotary kiln body there will be geometric center skew when rotating and running, do not run, because decentraction causes curve motion to seal in running with static revolution kiln hood and rotary kiln tail under same geometric center.Sealer inner ring and sealer outer ring adopt overall processing, install steel ball and form overall flexible rotating body between inner ring and outer ring, by the sealing exhausting of the size formation rule of Seal Design machining needs between inner ring and outer ring.

(3) employing is flexible coupling

The skew that the rotary kiln body solving rotation causes with revolution kiln hood rotary kiln tail geometric center decentraction.After sealer and rotary kiln body Flange joint, sealer still with static revolution kiln hood and rotary kiln tail decentraction.Sealer inner ring one end install be flexible coupling with revolution kiln hood and rotary kiln tail is connected, according to rotary kiln body geometric center offset how much design the specification be flexible coupling.

(4) flange integrated connection is adopted

Solve rotary kiln rotor geometric center decentraction, producing friction with static revolution kiln hood rotary kiln tail sealing place in process of production cannot seal.On rotary kiln body, welded flange bolt is connected with sealer outer ring, sealer and rotary kiln is made to form overall operation, inner ring connects damper be connected with supporting bracket, action of inner fixed by support and damper, and damper regulates and compensates the eccentric translocation of rotary kiln.

(5) adjustable pressure sealing is adopted

Fill out special seal material at gland packing box to make it to form seamless link, when sealing load and effect do not reach index, required index adjusted to by adjustment sealer screw.General encapsulant diameter is all be wound around with packing more than 1 meter, and packing joint forms seamed connection, and such connected mode does not reach fine sealing effectiveness, and present encapsulant is very large to the wearing and tearing of airtight and watertight padding exhausting, and encapsulant is changed frequent.Fill out special high molecule sealing materials at gland packing box, make it in filler exhausting, form seamless elastomeric under pressure effect and expand overall, under the effect adding lubricant, make encapsulant and filler exhausting rub very little.

1. economic benefit:

China's manufacture of cement is substantially all new calcium soap, and within 2013, China's cement output reaches 2,400,000,000 tons, and wherein clinker is 13.6 hundred million tons, and calcining capital equipment is rotary system.All there is the problem of leaking out in existing rotary kiln end and the sealing of kiln tail, air leak rate of air curtain is generally about 10%.After rotary kiln operates a period of time, air leakage coefficient can further increase.

Take coal dust as the new dry process rotary kiln of fuel be example, kiln hood and kiln tail inleakage can reach 0.05 ~ 0.08Nm ³/ kg.cl, this part leaks out and can bring larger impact to manufacture of cement operation.

This part leaking-in air amount is heated to 900 ~ 1000 DEG C in kiln system domestic demand, therefore increases by 15 ~ 24kcal/kg.cl by the hear rate of leaking out brought as calculated, amounts to into mark coal consumption 2.1 ~ 3.4kg.ce/t.cl.Calculate for daily output 5000t/d clinker production line, year increases standard coal consumption 3465 tons ~ 5610 tons.Calculate as converted into money by standard coal 600 yuan/ton, then increase coal-fired buying expenses 208 ~ 3,360,000 yuan year.

Meanwhile, owing to leaking wind-induced high-temperature blower and the increase of exhaust gas fan load, the increase 0.5kwh/t.cl power consumption brought, daily output 5000t/d clinker production line is calculated, year increases power consumption 82.5 ten thousand kwh, calculates with commercial power average price 0.5 yuan/kwh, then year increases the electricity charge 41.25 ten thousand yuan.

If cement industry can adopt novel rotary kiln sealing device, for daily output 5000t/d clinker production line, do not calculating the environmental problem such as leakage material of leaking out and producing interior, single can save more than 2,400,000 yuan every year from coal consumption and power consumption aspect, therefore the economic benefit of novel rotary kiln water-tight equipment and market prospects boundless.

2. society and environmental benefit:

Report on the Work of the Government in 2014 determines energy consumption per unit and declines more than 3.9%, and unit GDP CO2 emissions decline 4%, and nitrogen oxide emission declines 5% the binding indicator such as grade.The energy-saving and emission-reduction work of cement industry obtains showing great attention to of government and society.

In December, 2013 Environmental Protection Department and State General Administration for Quality Supervision issue the stricter standard such as " the cement industry atmosphere pollutants emission standards ", " cement unit product energy resource consumption limit " of new revision, this will effectively promote the progress of China's cement industry energy-saving and emission-reduction work.Cement production process and equipment to be improved further, technological operation optimization, promote manufacture of cement energy conservation, reduce cement energy consumption of unit product.For the energy-saving and emission-reduction work of enterprise, government technological transformation and R&D work give fund, tax revenue, to approve and initiate a project etc. in the support of necessity.For novel rotary kiln sealer, meet the requirement of country to industry energy-saving emission reduction works such as cement at present completely, well society and environmental benefit can be brought.

Daily output 5000t/d clinker production line is calculated, every year can emissions reduction carbon dioxide 8000 ~ 10000 tons, reduce sulfur dioxide (SO2) emissions about 260 tons.Meanwhile, due to novel rotary kiln sealer, can reach hermetically sealed does not have gap and leaks out, and effectively can avoid the problems such as the leakage material owing to leaking out brought, and reduces dust pollution and contributes to some extent state treatment haze weather.

Accompanying drawing illustrates: Fig. 1 is seal of rotary kiln device using state schematic diagram

Fig. 2 is seal of rotary kiln device cross section structure schematic diagram

Wherein: 1-hold-down bolt, 2-adpting flange, 3-pressure ring flange collar, 4-stud, 5-nut, 6-pressure ring, 7-filler exhausting one, 8-inner ring, 9-outer shroud, 10-axle, 11-bearing, 12-baffle ring, 13-bolt, 14-cooling water pipe, 15-is flexible coupling end hold-down ring, and 16-is flexible coupling end, 17-is flexible coupling, and 18-is flexible coupling and holds external tapping end, 19-inner ring connector drum, 20-cylinder of rotary kiln, 21-cooling water channel, 22-filler exhausting two.

Detailed description of the invention

embodiment 1:seal of rotary kiln device, comprise pressure ring 6, inner ring 8, outer shroud 9, bearing 11, baffle ring 12, outer shroud 9 is enclosed within outside inner ring 8, and pressure ring 6 and baffle ring 12 lay respectively at the both sides of inner ring 8 and outer shroud 9, and pressure ring 6 is connected with outer shroud 9 respectively with baffle ring 12, having filler exhausting 2 22 between inner ring 8 and baffle ring 12, is encapsulant in filler exhausting 2 22, filler exhausting 1; Filler exhausting 1 and bearing 11 is had between inner ring 8 and outer shroud 9, bearing 11 is supported on the outer surface of inner ring 8 and the inner surface of outer shroud 9, have the track rolled for bearing 11 between the inner surface of inner ring 8 outer surface and outer shroud 9, inner ring 8 rotates relative to rolling with the rolling of outer shroud 9 by bearing 11.

described in embodiment 1the inner surface of pressure ring 6 has pressure ring flange collar 3, the end face of pressure ring flange collar 3 is corresponding with the opening of filler exhausting 7, and the end face of such pressure ring flange collar 3 carries out press seal to the encapsulant in filler exhausting 7.In like manner, baffle ring 12 also can there is baffle ring flange collar corresponding with the opening of filler exhausting 2 22.

Seal of rotary kiln device using method one described in embodiment 1: pressure ring 6 is fixedly connected with the outer wall of cylinder of rotary kiln 20, inner ring 8 17 to be connected with kiln head cover or smoke-box by being flexible coupling.

Seal of rotary kiln device using method two described in embodiment 1: pressure ring 6 17 to be connected with kiln head cover or smoke-box by being flexible coupling, the connection of inner ring 8 and cylinder of rotary kiln 20.

embodiment 2: the present embodiment basic structure is with embodiment 1, and difference is: described device also comprises connection valve orchid 2, connection valve blue 2 is fixedly connected with pressure ring 6.

Seal of rotary kiln device using method described in embodiment 1 is basic substantially identical with the seal of rotary kiln device using method described in embodiment 1, and difference is: pressure ring 6 passes through connection valve blue 2 withcylinder of rotary kiln 20, kiln head cover or smoke-box connect.

embodiment 3: the present embodiment basic structure is with embodiment 1 or embodiment 2, and difference is: described device also comprisesbe flexible coupling end cylindrical shell 19, and the outer wall of inner ring connector drum 19 one end is fixedly connected with the inwall of inner ring 8.

Seal of rotary kiln device using method described in embodiment 1 is basic identical with the seal of rotary kiln device using method described in embodiment 1 or 2, and difference is: the other end of inner ring connector drum 19 17 to be connected with rotary kiln wall, kiln head cover or smoke-box by being flexible coupling.

embodiment 4: the present embodiment basic structure is with embodiment 1, embodiment 2 or embodiment 3, and difference is: have cooling water channel 21 in the inside of inner ring 8.Cooling water channel 21 is connected with cooling water pipe 14.

described in above-described embodimentgraphite packing preferably selected by filler in filler exhausting 7.

pressure ring 6 described in above-described embodiment and the connection between the sidewall of outer shroud 9 preferably adopt adjustable connection, like this by regulating the gap between pressure ring 6 and inner ring 8, regulatethe end face of pressure ring flange collar 3 to the pressure of the filler in filler exhausting 7, and then regulates sealing effectiveness.

baffle ring 12 described in above-described embodiment and the connection between the sidewall of outer shroud 9 preferably adopt and are fastenedly connected, and increase the intensity of outer shroud 9, prevent dust from affecting the life-span of bearing 11.

bearing 11 described in above-described embodiment both can select ready-made bearing, also corresponding construction can be processed at outer shroud 9 and inner ring 8 correspondence position, cylinder, needle roller, ball, roller etc. are installed between outer shroud 9 and inner ring 8 and form spring bearing structure, support outer shroud 9 and inner ring 8, help that outer shroud 9 is relative with inner ring 8 to be rotated.

outer shroud 9 described in above-described embodiment and between inner ring 8have a circle groove, groove surface is to pressure ring 6 opening, and the end face of pressure ring flange collar 3 and inner ring 8, outer shroud 9 forms a closed filler exhausting 7.

described in above-described embodiment be flexible coupling 17 refer to adopt flexible, can resistant to elevated temperatures material (such as: high temperature resistant silica gel, glass fabric) willin two parts of the relative rotation of seal of rotary kiln device, any portion couples together with relative fixed rotary kiln, kiln head cover or smoke-box, the skew that the rotary kiln body that can reduce rotation causes with revolution kiln hood, rotary kiln tail geometric center decentraction.

Embodiment 5, this enforcement basic structure is with above-mentioned any embodiment, difference is: adpting flange 2 is connected as a single entity by welding and equipment 20, pressure ring 6 is fixed on flange 2 by hold-down bolt 1, the pressure ring end face 3 of pressure ring 6 end compresses filler 7, compress with inner ring 8, outer shroud 9, the sealing duct of formation rule, ensure the sealing that equipment is in use good.Outer shroud 9 left end is by stud 4, nut 5 and pressure ring 6 support and connection, and right-hand member, by bolt 13 and baffle ring 12 support and connection, prevents radially wobbling of outer shroud 9.Bearing 11 is positioned between outer shroud 9 and inner ring 8, and the inner groovy two ends of outer shroud 9 are fixed on by axle 10, in the course of the work, bearing 11 can support fixation to static inner ring 8 to equipment, the outer shroud 9 of simultaneous buffering, transition, supporting movement and relatively rotating of static inner ring 8.Cooling tube 14 points of cooling water inlet ends and the port of export, cooling tube 14, through baffle ring 12, forms circulation via the cooling water channel 21 in the middle part of inner ring, cools equipment between import and export.Be flexible coupling and 17 be fixed on the end cylindrical shell 19 that is flexible coupling of inner ring by the end hold-down ring 15 that is flexible coupling, and to be connected with other equipment by external tapping end 18, the axial float that can effectively produce in conditioning equipment operation process with radially wobble.

Equipment described in embodiment 5 is kiln cylinder body, kiln hood or kiln tail; If when inner ring connector drum 19 and kiln cylinder body are by being flexible coupling, then kiln hood or kiln tail pass through connection valve blue 2 is fixedly connected with this device; Ifwhen kiln hood or kiln tail are connected with this device by being flexible coupling, then kiln cylinder body passes through connection valve blue 2 is fixedly connected with this device.

Claims (6)

1. seal of rotary kiln device, is characterised in that: comprise pressure ring (6), inner ring (8), outer shroud (9), bearing (11), baffle ring (12); Outer shroud (9) is enclosed within inner ring (8) outward, and bearing (11) to be supported between inner ring (8) and outer shroud (9) and the track formed at inner ring (8) and outer shroud (9) rolls; Pressure ring (6) and baffle ring (12) lay respectively at the both sides of inner ring (8) and outer shroud (9), pressure ring (6) is fixedly connected with outer shroud (9) respectively with baffle ring (12), inner ring (8), between outer shroud (9) and pressure ring (6), form filler exhausting one (7), having filler exhausting two (22) between inner ring (8) and baffle ring (12), is encapsulant in filler exhausting two (22), filler exhausting one (7).

2. seal of rotary kiln device according to claim 1, is characterised in that: the inner surface of pressure ring (6) has pressure ring flange collar (3), and the end face of pressure ring flange collar (3) is corresponding with the opening of filler exhausting one (7).

3. seal of rotary kiln device according to claim 1, is characterised in that: described device also comprises connection valve orchid (2), and connection valve orchid (2) is fixedly connected with pressure ring (6).

4. the seal of rotary kiln device according to claim 1,2 or 3, is characterised in that: described device also comprisesinner ring connector drum (19), the outer wall of inner ring connector drum (19) one end is fixedly connected with the inwall of inner ring (8).

5. the seal of rotary kiln device according to claim 1,2 or 3, is characterised in that: there is cooling water channel (21) inside of described inner ring (8).

6. the seal of rotary kiln device according to claim 1,2 or 3, is characterised in that: described encapsulant is graphite packing.