CN2194990Y

CN2194990Y - Small high-speed centrifugal chlorine gas compressor

Info

Publication number: CN2194990Y
Application number: CN 94206814
Authority: CN
Inventors: 吴若琨; 吴步锋
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-12
Filing date: 1994-03-12
Publication date: 1995-04-19
Anticipated expiration: 2004-03-12

Abstract

The utility model relates to a small high-speed centrifugal chlorine gas compressor. A main shaft is supported by two sliding bearings of a two-stage gear speed increasing box; a comb inflating and sealing mechanism and a single-stage semi-open type impeller with radical and straight blades are installed at one end or both ends of the main shaft with cantilevers. When the measures that anticorrosion and easy scratch materials are sprayed on the inner surface of a sealing sleeve and the outer surface of the end cover of a flow channel, etc. are taken, working rotation is caused to be greater than 20000r/min, flow capacity is reduced to 2000-1000 cubic meters/hour, and two-stage compression discharged pressure can reach 0.5-0.6Mpa. The utility model has the advantages of simple structure, convenient disassembly, convenient assembly and convenient maintenance. When the small high-speed centrifugal chlorine gas compressor is used; the electricity expense saved from the operation of the small high-speed centrifugal chlorine gas compressor in one year can recover installation cost; capital outlay is only 20-30% of the cost of background art. Therefore, the small high-speed centrifugal chlorine gas compressor can be used and generalized in large and medium chlor-alkali plants.

Description

Small high-speed centrifugal chlorine gas compressor

The utility model relates to the device that is applicable to the conveying particular fluid.

Chlorine is by the acquisition that electrolyzes table salt, the chlorine that comes out in the electrolytic bath, through filtering and drying, after removing the salt grain and moisture content of deentrainment, all need pass through liquid-piston compressor (domestic each user factory abbreviates chlorine gas pump as at present) or centrifugal compressor, chlorine is transported in the process units with chlorine goes, produce the various organic and inorganic products that contain chlorine.For the conveying equipment of chlorine, domestic each large, medium and small type chlor-alkali plant, all adopting flow in the past is 150～750m ³The chlorine gas pump of/h is carried chlorine; It is 3700m that domestic-developed in 1973 is developed into displacement ³The chlorine centrifugal compressor of/h can replace 750m ³6～8 of/h chlorine gas pumps, energy consumption are 50% of chlorine gas pump only, and energy-saving effect is remarkable.But this machine only is applicable to caustic soda production greater than 6～80,000 tons/year large-scale chlor-alkali plant, and to the medium-sized factory of caustic soda production at 2～50,000 tons/year, the small flow centrifugal formula chlorine gas compressor product that does not adapt to for a long time can supply to select for use.At present still adopt the very low chlorine gas pump of efficient to carry chlorine.Existing 3700m ³/ h chlorine centrifugal compressor, its structure are the level Four compression, cooling in the middle of cylinder body horizonally split, inter-stage all need, and structure dismounting and maintenance are all very complicated.Very harsh (water content of import chlorine＜40P.P.M) needs expensive chlorine gas drying system and huge equipment to this technology, and need build the new factory building that floor is arranged in addition to the chlorine quality requirement of import.Therefore, prior art not only is not suitable for medium-sized chlor-alkali plant, and user's capital investment is very big.

The purpose of this utility model, it has broken through the structure and the performance range of conventional centrifugal chlorine gas compressor, has structurally adopted the semi-open type straight radial blade impeller of high pressure ratio, improves working speed; Single stage compression, impeller shaft are to installation, and chlorine gas drying system that must be special is greatly simplified structure, and this function overcomes the problem that exists in the background technique.

For reaching above-mentioned purpose, the technical solution of the utility model is, it comprises gear-box, main shaft, impeller, seal arrangement, main shaft supporting is on two sliding bearings of two-stage gear speedup case, on one output terminal of main shaft successively cantilever broach gas-flow closure mechanism and single-stage semi-open type straight radial blade impeller are housed, broach and impeller can be with main axis rotation, have the aperture that can introduce nitrogen on the stuffing box gland relative with broach, chlorine is discharged from outer pipe P mouth through inlet tube O mouth, impeller radial flow path, Diffuser, volute.For satisfying and meet the needs of the user of elevated pressures, can on another output terminal of main shaft, install second level impeller.

Below in conjunction with accompanying drawing, provide details of the present utility model by description to embodiment.

Fig. 1, structural representation of the present utility model;

Fig. 2, another kind of structural representation of the present utility model.

As shown in Figure 1, the main shaft 4 of compressor is bearing on two sliding bearings 1 of two-stage gear speedup case 3, be fixed on the driven gear 2 on the main shaft 4, driven by the two-stage speedup by motor, order about main shaft 4 and make high speed rotating, impeller 7 cantilevers are installed in an end of main shaft, chlorine is from the O mouth of inlet tube 8, axially enter impeller 7, promoted to obtain energy by the impeller 7 of high speed rotating, chlorine is discharged from the P mouth of outer pipe 6 through radial flow path, Diffuser 10 and volute 11 from impeller.For preventing that operating chlorine from leaking, broach gas-flow closure mechanism 5 is housed on the main shaft 4 of impeller 7 back, broach 12 is with main shaft 4 rotations, radial clearance between the stuffing box gland 13 relative with it is very little (to be about 0.08～0.15mm), on stuffing box gland 13, have the aperture that to introduce nitrogen, nitrogen gas pressure leaks to stop chlorine than the high 0.02～0.03MPa of pressure of suction port chlorine.At the bore area of stuffing box gland 13 and the outer surface of runner end cap 9, it is nonmetal anti-corrosion and be easy to abrade the material that comes off all to spray one deck, as ceramic tetrafluoro.Its effect be when main shaft 4 owing to the accidentalia unstable Vibration or move axially when broach 12 taking place colliding friction with stuffing box gland 13 internal surfaces, or the outer surface of impeller 7 axial motions and runner end cap 9 is collided when rubbing, broach that sprayfused coating can be rotated or impeller scratch come off, the heat that is produced is quite little, is unlikely the combustion temperature (being about 260 ℃) above chlorine and iron and steel.For guaranteeing the stable at a high speed rotation of impeller, the sliding bearing 1 of supporting spindle 4 adopts the combination of tilting-pad radial bearing and folded piece formula thrust bearing.

Another kind of structure of the present utility model, as shown in Figure 2, another centrifugal compression set 15 in output terminal installing second level at the main shaft 4 of the centrifugal compression set 14 of the first order, promptly on the output axle head of the right-hand member of gear speedup case 3 also successively cantilever identical broach gas-flow closure mechanism 5 and single-stage semi-open type straight radial blade impeller 7 are housed, broach 12 and impeller 7 can be with main shaft 4 rotations, have the aperture that can introduce nitrogen on the stuffing box gland 13 relative with broach 12.Chlorine is discharged from the P mouth of outer pipe 6 through the mouth of inlet tube 8, impeller 7 radial flow path, Diffuser 10, volute 11, more by the road 16, O ' mouth of inlet tube, impeller 7 radial flow path, Diffuser 10, volute 11, from the P ' mouth discharge of outer pipe 6.Head pressure after two stage compression can reach 0.5～0.6MPa, to satisfy and to meet the needs of the user of high pressure.

An enforcement product of the present utility model designs according to the running parameter of present chlorine gas pump, must not acquire background technique and all must set up chlorine gas drying system, the installation in place on the basis of former YLJ750/0.3 chlorine gas pump of this machine gets final product, and its service behaviour parameter of product is at present:

Flow 1500m ³/ h

Outlet pressure 0.26MPa

Working speed 22000r/min

Power of motor 90kw

Efficient＞62%

The utility model is compared the useful effect that has with background technology:

1. break through the quantitative limitation of conventional centrifugal chlorine gas compressor minimum stream, flow is dropped to 2000m³/ h even to 1000m³/ h is to adapt to the production scale of domestic medium-sized enterprise;

2. adopt the semi-open type straight radial blade impeller of high pressure ratio, rotating speed＞20000r/min, the single-stage impeller can reach the outlet pressure of present Pendular ring type chlorine gas;

3. anti-corrosion, the easy scratch of the stuffing box gland internal surface of seal element and the runner end cap outer surface spraying material that comes off is fundamentally stopped pyrophoricity accident and is taken place;

4. main shaft supporting adopts tilting-pad radial bearing and folded fast formula thrust bearing, guarantees the stable at a high speed rotation of impeller;

5. the high speed output shaft of speedup box is the main shaft of compressor, and the impeller cantilever is installed, and structure is greatly simplified, and dismounting and maintenance are very easy;

In addition, in the present factory that uses chlorine gas pump, behind employing the utility model, the electricity charge that operation was saved in a year get final product the recovery plant expense, and capital investment only need background technique 3700m ³20～30% of/h chlorine gas compressor.Therefore, can promote the use of in large and medium-sized chlor-alkali factory.

Claims

1, a kind of high-speed small-size chlorine centrifugal compressor, it comprises gear-box, main shaft, impeller, sealing mechanism, feature of the present utility model is: main shaft [4] is bearing on two sliding bearings [1] of two-stage gear speedup case [3], on one output terminal of main shaft [4] successively cantilever broach gas-flow closure mechanism [5] and single-stage semi-open type straight radial blade impeller [7] are housed, broach [12] can rotate with main shaft [4] with impeller [7], have the aperture that can introduce nitrogen on the stuffing box gland [13] relative with broach [12], chlorine is through the O mouth of inlet tube [8], impeller [7] radial flow path, Diffuser [10], volute [11] is discharged from the P mouth of outer pipe [6].

2, chlorine gas compressor according to claim 1, it is characterized in that: on another output terminal of main shaft ［ 4 ］ also successively cantilever identical broach gas-flow closure mechanism ［ 5 ］ and single-stage semi-open type straight radial blade impeller ［ 7 ］ are housed, broach ［ 12 ］ can rotate with main shaft ［ 4 ］ with impeller ［ 7 ］, have the aperture that to introduce nitrogen on the stuffing box gland ［ 13 ］ relative with broach ［ 12 ］, chlorine is through the O mouth of inlet tube ［ 8 ］, impeller ［ 7 ］ radial flow path, Diffuser ［ 10 ］, volute ［ 11 ］ is discharged ［ 16 ］ more by the road from the P mouth of outer pipe ［ 6 ］, O ' the mouth of inlet tube, impeller ［ 7 ］ radial flow path, Diffuser ［ 10 ］, volute ［ 11 ］, discharge from the P ' mouth of outer pipe ［ 6 ］.

3, chlorine gas compressor according to claim 1 and 2, it is characterized in that: the bore area of the stuffing box gland ［ 13 ］ of broach gas-flow closure mechanism ［ 5 ］ and the outer surface of runner end cap ［ 9 ］, it is nonmetal anti-corrosion and be easy to abrade the material that comes off all to spray one deck, as ceramic tetrafluoro.

4, chlorine gas compressor according to claim 1 and 2 is characterized in that: the sliding bearing ［ 1 ］ of supporting spindle ［ 4 ］, adopt the combination of tilting-pad radial bearing and folded piece formula thrust bearing.