CN201025264Y

CN201025264Y - A high-pressure and small-flow chlorine compressor

Info

Publication number: CN201025264Y
Application number: CNU2006201411435U
Authority: CN
Inventors: 吴若昆; 周国强
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-18
Filing date: 2006-12-18
Publication date: 2008-02-20
Anticipated expiration: 2016-12-18

Abstract

The utility model discloses a high pressure low flow chlorine compressor. The motor is connected with two overdrive gears via a coupling; the high-speed shafts extending out of the driving gearbox are respectively provided with a labyrinth packing of the same structure, after which the two ends of the high-speed shafts are respectively provided with the first grade impeller and the second grade impeller. The labyrinth packing is four segments of labyrinth packing and is a device whose extrorse vortex shell at the two ends of the high-speed shaft outside the driving gearbox is successively provided with five chamber flow fields. The structure is that of the whole gearbox and is a double-grade transmission via the small module spur gear. The shaft seal is of labyrinth seal with four segments of come ensuring the purity of the chlorine and preventing from the leakage of the chlorine. The oil is supplied to the central axis bearing through coupled angle contact rolling bearing, meeting the needs of the lubrication and the heat dissipation of the rolling bearing that closely reaches the limit speed. The oil lubricating piping is directly processed on the wall of the gearbox, reducing the joint in tubing oil supplement, thus ensuring the reliability of the oil supplement. To meet the demands of low flow and high efficiency, the rotational speed reaches the speed of more than 35000 cycles/min.

Description

A kind of high voltage little flow rate chlorine compressor

Technical field

The utility model relates to centrifugal compressor, especially relates to being used for a kind of high voltage little flow rate chlorine compressor that the high-pressure process flow process is produced liquid chlorine.

Background technique

Chlorine is in industrial purposes and extensive, and factory's (or device) of factory of production chlorine (or device) and use chlorine is not often at a place, the unable again ability of producing chlorine of providing for oneself of the factory of many use chlorine, therefore, must be the chlorine pressurized cooling fluidization, pack into tank car or steel cylinder are so that be transported to user's use.Chlor-alkali factory itself simultaneously, also because the imbalance that the downstream produces with the chlorine device product, the chlorine that electrolytic bath need be produced continuously, part liquefaction is stored, with the balanced production of adjusting chemical industry.

China's caustic soda production was 5,500,000 tons in 2000, increased to 1,250 ten thousand tons in 2005, and the expectation production capacity was 1,850 ten thousand tons in 2006.Modern 1,250 ten thousand tons of caustic soda with 2005 calculate, and produce chlorine simultaneously and are about 1,100 ten thousand tons.According to statistics, ten thousand tons of the 300-400 of having an appointment, promptly the chlorine of 30-35% needs liquefaction, and as the needs of commodity selling or factory self balanced production, so the production scale amount of liquid chlorine is very big.

Because chlorine is easy to liquefaction, chlorine suitably to be pressurizeed, cooling simultaneously gets final product, and the method for producing liquid chlorine at present both at home and abroad has three kinds, that is:

1, low-temp low-pressure method, this method manufacturing equipment is many, the energy consumption height, the most of factories of China adopt this method.

2, medium temperature and medium pressure method, this method are the liquifying method of external common employing, it be with fluorine Lyons as refrigeration agent, seriously polluted with chlorofluoromethane refrigerant but according to international environment environmental law regulation, so will progressively eliminate.

3, high temperature and high pressure method, this method energy consumption is minimum, pollution-free, and economic benefit is the highest in above-mentioned three kinds of methods, but the design of manufacturing mechanism and manufacture difficulty are bigger.

High temperature and high pressure method is produced liquid chlorine, must be compressed to chlorine more than the 1.0Mpa, with about 30-35 ℃ circulating water cooling, does not need chiller plant again, i.e. liquefaction becomes liquid chlorine.The external at present equipment of producing high pressure chlorine has:

1, liquid-ring high pressure compressor, China has the man factories of number such as chemical plant, Qiqihar, aerospace chemical plant, Henan and introduces, and throughput is 20,000 tons of/year liquid chlorines.This machine needs the concentrated sulphuric scid to do circulation, and compressor efficiency is lower than 30%, power of motor 220KW, simultaneously many sulfate pollution things.

2, reciprocal compressor, Japan once produced this series products, though reciprocal compressor power height, easily damaged parts is many, sealing difficulty is big, the Cost of repair and maintenance height, therefore investment, does not obtain user's approval than higher yet.

3, centrifugal compressor has how tame factory that this product is arranged abroad, and its characteristics are:

1. flow is bigger, as has the German KK﹠amp of more than 40 year manufacturing chlorine gas compressor; K group is from outlet pressure 11.8-12.03bar (A) the chlorine press that 1981-2004 produced, and flow is 5627-7774NM ³/ h (being equivalent to caustic soda production is ten thousand tons/year of 15-20).

2. structure is the single-shaft multi-stage impeller.

3. suction pressure is normal pressure (being electric groove outlet pressure), so compressor pressure ratios is big, and impeller quantity is many, the chlorine gas compressor of some factory, impeller quantity even 6-8 section nearly.

In view of this high pressure centrifugal chlorine press only is applicable to integrated mill's (more than 150,000 tons) abroad, have only integrated mill just to adopt the high temperature and high pressure method flow process to produce liquid chlorine, and medium-sized factory (below 150,000 tons) produces liquid chlorine, can only use the medium temperature and medium pressure method.The characteristics of China's chlor-alkali industry, most chlor-alkali plant itself is all produced and is used chlorine products, has only sub-fraction need be prepared into liquid chlorine.At home, also chlorine is not compressed to the equipment of 1.2Mpa at present, the high pressure centrifugal chlorine gas compressor of small capacity also is blank abroad.Therefore, the domestic user needs China's machinery industry can provide small capacity voluntarily, high efficiency high pressure chlorine gas compressor.

Summary of the invention

The purpose of this utility model is to provide a kind of high voltage little flow rate chlorine compressor.

The technological scheme that its technical problem that solves the utility model adopts is:

Motor is connected with the input shaft of driving gearbox by coupling, gearwheel on the input shaft is by the gear two-stage overdrive gear on the jack shaft, with the pinion on the high speed shaft, stretch out on the outer high speed shaft of driving gearbox the identical labyrinth gland of structure is set respectively after, first order impeller and second level impeller respectively are installed at the high speed shaft two ends.Described labyrinth gland is that four sections labyrinth glands are to be provided with five chambers successively on the volute outside on the high speed shaft at two ends outside driving gearbox, and first chamber is the nitrogen exhaust port; Second chamber be nitrogen inlet behind valve, be communicated with dry nitrogen; The 3rd chamber is nitrogen and chlorine mixing exhaust port, and the 4th chamber leads to the one-level impeller inlet for the I and II parallel connection; The 5th chamber is the both stage impellers back side.

The bearing of described high speed shaft is a watt dynamic pressure radially thrust joint bearing that slides that can incline; The bearing of jack shaft is rolling ball bearing with the two bearings in parallel of input shaft.

On described driving gearbox wall thickness, have inflow pipeline and duct, have the circular groove with hole link on the outer circular hole of the two bearings in parallel of jack shaft, the inboard, outer ring of two rolling bearings, grinding goes out groove, and groove number is uniformly distributed along the circumference 3～4.

It is 1.5 gear that described gear is straight-tooth, modulus m.

The beneficial effect that the utlity model has is:

1, for adapting to the high efficiency requirement of small flow, the rotating speed of chlorine compressor is brought up to more than 35000 rev/mins.

2, be that overall gear is box on the structure, adopt the transmission of little modulus spur gear twin-stage.

3, be the inlet pressure of this machine with existing chlorine press of present each chlor-alkali plant or Nahsi delivery side of pump pressure, therefore only need two stage compression, thereby make the simple in structure of high pressure centrifugal compressor that manufacturing expense reduces greatly.

4, the axle envelope adopts four sections broach labyrinth sealings, has guaranteed the purity of chlorine and has effectively prevented leaking outside of chlorine.

5, the bearing of input shaft and jack shaft adopts paired angular contact bearing, and at the middle fuel feeding of matched bearings, guaranteeing need near the Lubrication of Rolling Contact Bearing and the heat radiation of limit speed.

6, lubricating oil pipeline directly processes on gearbox wall, reduces general joint with the oil pipe fuel feeding, guarantees that fuel feeding is reliable.

Description of drawings

Fig. 1 is a structural principle schematic representation of the present utility model;

Fig. 2 is four sections labyrinth gland structural principle schematic representation of the present utility model;

Fig. 3 is a midship shaft bearing fuel system structural principle schematic representation of the present utility model.

Among the figure: 1, motor, 2, coupling, 3, driving gearbox, 4, input shaft, 5, gearwheel, 6, jack shaft, 7, high speed shaft, 8, small gear, 9, first order impeller, 10, second level impeller, 11, first order mouth, 12, first order Diffuser, 13, volute, 14, outer pipe, 15, second level inlet, 16, second level outer pipe, 17, nitrogen inlet, 18, nitrogen and chlorine mixing exhaust port, 19, one-level import, 20 are led in one secondary parallel connection, the nitrogen exhaust port, 21, bearing, 22, bearing, 23, bearing, 24, the end seal ring, 25, packing ring, 26, the duct, 27, circular groove, 28, groove, 29, inflow pipeline.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As shown in Figure 1, motor 1 of the present utility model is connected with the input shaft 4 of driving gearbox 3 by coupling 2, gearwheel 5 on the input shaft 4 is by the gear two-stage overdrive gear on the jack shaft 6, with small gear 8 engagements on the high speed shaft 7, stretch out on the outer high speed shaft 7 of driving gearbox 3 four sections identical labyrinth glands of structure are set respectively after, at high speed shaft 7 two ends first order impeller 9 and second level impeller 10 are installed respectively;

As shown in Figure 1, described labyrinth gland is four sections Comb Labyrinth Seals devices, is to be provided with five chamber F, E, D, C and B successively on the volute 13 outside on the high speed shaft 7 at two ends outside driving gearbox 3, and the first chamber F is the nitrogen exhaust port; The second chamber E be nitrogen inlet behind valve, be communicated with dry nitrogen; The 3rd chamber D is nitrogen and chlorine mixing exhaust port, and the 4th cavity C is led to the one-level impeller inlet for the I and II parallel connection; The 5th chamber B is the both stage impellers back side.

The bearing 21 of described high speed shaft 7 is watt dynamic pressure of can inclining the radially thrust joint bearing that slides; The bearing 22 of jack shaft 6 is rolling ball bearing with the two bearings in parallel 23 of input shaft 4.

As shown in Figure 3, on described driving gearbox 3 wall thickness, have inflow pipeline 29 and duct 26, have the circular groove 27 that is communicated with duct 26 on the two bearings in parallel 22 outer circular holes of jack shaft 6, the inboard, outer ring of two rolling bearings 22, grinding goes out groove 28, and groove 28 quantity are uniformly distributed along the circumference 3～4.

It is 1.5 gear that described gear is straight-tooth, modulus m.

Machine of the present utility model is as shown in Figure 1: motor 1 is by the input shaft 4 of coupling 2 driving gearboxs 3, gearwheel 5 on the input shaft is by the gear two-stage speedup on the jack shaft 6, the two ends of small gear 8 high speed shafts 7 on the driven high-speed axle 7, each installs first order impeller 9 and second level impeller 10, the high speed rotating of impeller (this moment, wheel speed reached 35000-40000 rev/min), chlorine is done work, thereby energy is passed to gas raises the pressure of chlorine, chlorine is supplied with from existing chlorine low pressure turbine or Nahsi pump, this moment, inlet pressure was 0.28-0.32Mpa (A), chlorine enters from first order inlet 11, chlorine enters second level inlet 15 through first order impeller 9 and first order Diffuser 12 volutes 13 again after outer pipe 14 enters interstage cooler (this figure does not represent) cooling, after same impeller continues acting to chlorine, discharge from second level outer pipe 16, this moment, chlorine gas pressure can reach more than the 1.1Mpa (A), promptly reaching just can be with the purpose of chlorine gas liquefaction with the normal temperature tap water, the sealing of chlorine, adopt four sections mazy special constructions, prevent that effectively sealing gas (normally drying nitrogen) from entering the chlorine system, influencing liquefaction efficiency. drying nitrogen enters from 17, the big 0.005-0.01Mpa of pressure of its pressure ratio mixed gas (mixed gas of nitrogen and chlorine) exhaust port 18, from first, the chlorine that the chamber B at the sencond stage impeller back side comes out leads to first order impeller inlet 11 after the cavity C parallel connection, axle envelope principle and structure are please referring to shown in Figure 2.

Among Fig. 1, the bearing of three rotating shafts, the bearing 21 of high speed shaft 7 is watt dynamic pressure of can inclining the radially thrust joint bearing that slides, the bearing 22 of jack shaft 6 is rolling ball bearing with the bearing 23 of input shaft 4, because the limit speed that the working speed of jack shaft has allowed near rolling bearing, the utility model has adopted special fuel system, as shown in Figure 3, pressure lubrication oil is entered in the circular groove 27 at bearing top circle place by duct 26, in the inboard, outer ring of two rolling bearings that are installed in parallel, grinding goes out area and is about 1MM ²Groove 28 groove number along garden Zhou Junbu 3-4, this fuel system guarantees lubricatedly fully and effectively bearing to be lubricated and to cool off, and guarantees the working life of bearing.The inflow pipeline of the utility model lubricant oil is directly to process on the gear-box wall thickness, reduces many oil connections, thereby has guaranteed the reliability of fuel feeding, inflow pipeline 29 as shown in Figure 3.Friction generates heat and cause the danger (notes: if the temperature of iron and steel is above 260 ℃ that catch fire during for fear of rotor and stator rotation unstability, in the environment of chlorine, the burning of meeting spontaneous reaction), to with the very little end seal ring 24 in impeller end clearance and with very little packing ring 25 its materials between centers crack for filling PTFE, when rotating contact, fill tetrafluoro and be easy to abrade and come off, can not produce bigger heat.

Performance parameter of the present utility model is:

Throughput: produce 2.5 ten thousand tons of liquid chlorines per year

Chlorine inlet pressure: 〉=0.28Mpa (A)

Chlorine inlet temperature :≤40 ℃

Chlorine outlet pressure: 1.2Mpa (A)

Spindle speed: 36500 rev/mins

Air horsepower: 85.2KW

Power of motor: 110KW

Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.

Claims

1. high voltage little flow rate chlorine compressor, motor (1) is connected with the input shaft (4) of driving gearbox (3) by coupling (2), gearwheel (5) on the input shaft (4) is by the gear two-stage overdrive gear on the jack shaft (6), with small gear (8) engagement on the high speed shaft (7), stretch out on the outer high speed shaft (7) of driving gearbox (3) the identical labyrinth gland of structure is set respectively after, at high speed shaft (7) two ends first order impeller (9) and second level impeller (10) are installed respectively; It is characterized in that: described labyrinth gland is four sections labyrinth glands, be that the high speed shaft (7) at two ends outside driving gearbox (3) is gone up on the outside volute (13) and is provided with five chambers (F, E, D, C and B) successively, first chamber (F) is the nitrogen exhaust port; Second chamber (E) be nitrogen inlet behind valve, be communicated with dry nitrogen; The 3rd chamber (D) is nitrogen and chlorine mixing exhaust port, and the 4th chamber (C) leads to the one-level impeller inlet for the I and II parallel connection; The 5th chamber (B) is the both stage impellers back side.

2. a kind of high voltage little flow rate chlorine compressor according to claim 1 is characterized in that: the bearing (21) of described high speed shaft (7) is a watt dynamic pressure radially thrust joint bearing that slides that can incline; The bearing (22) of jack shaft (6) is rolling ball bearing with the two bearings in parallel (23) of input shaft (4).

3. a kind of high voltage little flow rate chlorine compressor according to claim 1, it is characterized in that: on described driving gearbox (3) wall thickness, have inflow pipeline (29) and duct (26), have the circular groove (27) that is communicated with duct (26) on the outer circular hole of two bearings in parallel (22) of jack shaft (6), the inboard, outer ring of two rolling bearings (22), grinding goes out groove (28), and groove (28) quantity is uniformly distributed along the circumference 3～4.

4. a kind of high voltage little flow rate chlorine compressor according to claim 1 is characterized in that: it is 1.5 gear that described gear is straight-tooth, modulus m.