CN203908143U - Novel ammonia refrigeration intercooler - Google Patents

Abstract

The utility model discloses a novel ammonia refrigeration intercooler. A coil tube for heat exchange of high-pressure ammonia liquor is arranged in a tank body, and a tubular convection barrel is welded at the center of the coil tube; a gas guide tube penetrates into the convection barrel and a gas outlet sieve cage is arranged in an orifice of the gas guide tube, blades with dip angles are welded on the outer wall of the gas guide tube, clearances are reserved among the blades with dip angles, and a tubular outer barrel is welded on each blade with the dip angle; isolating plates and baffle plates are arranged in a gas-liquid separator tank body; the tank body is isolated by the isolating plates, so as to enable ammonia vapor to rise only along the clearances among the blades with dip angles; ammonia vapor is baffled by the baffle plates so as to only rise in a baffling manner; downward opened liquid flow tubes are arranged on the isolating plates; an exhaust tube for two-stage compression is arranged at the upper part of an intercooler body. According to the novel ammonia refrigeration intercooler, liquid ammonia carried in the ammonia vapor can be thoroughly removed, the working efficiency and performance of the two-stage compression can be improved, and the heat-exchange coefficient of the coil tube can be improved through the arranged convection barrel, and the cooling of the high-pressure ammonia liquor in the coil tube is facilitated.

Description

Novel ammonia refrigeration intercooler

Technical field

The utility model relates in a kind of ammonia refrigerating installation of Two-stage Compression, and ammonia steam carries out cooling intercooler before carrying out entering split-compressor after one-level compression.

Background technology

Ammonia has good thermodynamic property, in relatively large refrigeration system, is all generally to adopt ammonia as cold-producing medium.In practice, when required low temperature generally all adopts double-stage compressor to complete compression work lower than-20 ℃, one-level compression sucks the Low Temperature Steam of flash-pot, in compressed discharge, presses overheated gas.

Middle pressure overheated gas is generally cooled to 0 ℃ of left and right by intercooler, complete ammonia vapoization processes simultaneously, then carry out by hiigh pressure stage, being sucked compression again after ammonia gas-liquid separation, the HTHP completing after two stages of compression washs after oil removing saturation by removing oil eliminator again, goes condenser to complete condensation liquefaction.

Similar to one-level compression, the ammonia steam of two-stage compression can not carry liquefied ammonia, otherwise can cause the raising of ammonia compressor power consumption, causes away " damp car ", and serious cylinder knock appears in compressor, especially easily damages compressor,

Intercooler mainly completes three functions:

1. pair overheated gas through one-level compression carries out washing type cooling and saturation;

2. the ammonia steam that pair completes saturation carries out being convenient to carry out hiigh pressure stage compression after gas-liquid separation;

3. the high pressure ammoniacal liquor that pair enters low pressure vapo(u)rization system realize 0 ° cooling.

There is the defect that gas-liquid separation is thorough, coil pipe cooling heat transfer coefficient is lower in existing ammonia intercooler, effect can not be satisfactory at work.

Utility model content

The technical problems to be solved in the utility model overcomes the deficiencies in the prior art exactly, a kind of novel ammonia refrigeration intercooler is provided, this gas-liquid separator by the liquefied ammonia that saturated ammonia steam is carried repeatedly turn back, separation, removed comparatively thoroughly the liquefied ammonia carrying in saturated ammonia steam, eliminated to greatest extent the impact of liquefied ammonia on second-compressed, improve operating efficiency and the service behaviour of second-compressed, saved electric power, extended service life; And by convective tube is set, increased substantially the coefficient of heat transfer of coil pipe, and be conducive to the cooling of coil pipe inner high voltage ammoniacal liquor, there is feature simple in structure, practical.

For overcoming the deficiencies in the prior art, the utility model is taked following technical scheme:

A novel ammonia refrigeration intercooler, comprises intercooler tank body, it is characterized in that: in intercooler tank body, be provided with the coil pipe of high pressure ammoniacal liquor heat exchange, coil pipe center is welded with the convective tube of tubulose; From the overheated ammonia steam pipe of one-level compression in wireway gos deep into convective tube and the mouth of pipe be provided with out air sifter cage, on wireway outer wall, be welded with blade with angle, gapped between blade with angle, on blade with angle, be welded with the urceolus of tubulose; In gas-liquid separator tank body, be provided with division board and flow-stopping plate; Division board separates tank body, and ammonia steam can only be risen on the gap between blade with angle; Flow-stopping plate blocks ammonia steam, makes ammonia steam increase by baffling; Division board is provided with the fluid flow tube under shed; Intercooler tank body top is provided with blast pipe and removes two-stage compression.

Described intercooler tank body is provided with liquid level gauge, is convenient to observe and regulation and control liquid level.

Because liquefied ammonia in intercooler tank body constantly gasifies, in intercooler tank body, temperature is very low, in order to isolate heat transfer, at intercooler tank wall, is provided with heat-insulation layer, prevents that cold runs off.

During work, liquefied ammonia in intercooler tank body is kept to suitable liquid level, overheated ammonia steam from one-level compression passes under liquid level and connects and sieve cage through wireway, overheated ammonia steam from one-level compression, by the diffusion of sieve cage, evenly discharge and contact with liquefied ammonia, realize ammonia vapo(u)rous and overflow liquid level, sieve cage has certain distance every bottom, avoids the lubricating oil of disturbance bottom deposition.

Tubulose urceolus, a part for blade with angle and wireway outer wall forms cyclone, saturated ammonia steam is in uphill process, be subject to stopping of division board, can only enter division board upper strata by swirler blades gap, be subject to flow-stopping plate barrier effect and produce baffling, for guaranteeing gas-liquid separation effect, can repeat upper strata swirl vane and baffle plate baffling through same structure.

When ammoniacal liquor face overflows steam, be isolated plate isolation, can only flow by impeller clearance, high-speed gas is forced eddy flow by blade, and wherein ammoniacal liquor, in swirling eddy uphill process, is centrifuged and spreads out, and departs from gas phase, realizes gas-liquid separation for the first time.

When swirling eddy is blocked by flow-stopping plate, can only walk around by baffling, produce inertia for the second time and stream, turn, realize gas-liquid separation for the second time.

Saturated ammonia steam continues to rise, and can repeatedly repeat the workflow of front twice gas-liquid separation, and the liquefied ammonia of separating is got back in the liquid phase of tank body lower part by fluid flow tube, realizes the complete separation of liquefied ammonia in saturated ammonia steam, finally by blast pipe, enters two-stage compression.

Because gas in convective tube forms bubble, rise, thereby in convective tube, ammonia vapour-liquid averag density is less than outside cylindrical shell, in convective tube, gas liquid mixture forms upwelling, and the outer liquefied ammonia of convective tube flows and supplements into cylindrical shell, and convective tube forms the sinking of ammoniacal liquor outward.This function intensified automatic convection circulation of ammoniacal liquor in intercooler tank body that convective tube produces, thereby can directly improve the heat transfer coefficient of coil pipe, effectively reduce the temperature that coil pipe inner high voltage ammoniacal liquor enters evaporimeter, be conducive to ammoniacal liquor evaporation and absorb more heats.

The utility model, by saturated ammonia steam repeatedly eddy flow, baffle plate baffling in uphill process, forms and repeatedly forces gas liquid separating function series connection, has very strong gas-liquid separating function.Add knockout drum body section larger, the air-flow rate of climb is slower, also have the drop natural subsidence under Action of Gravity Field, thereby gas-liquid separation is very thorough; Meanwhile, by the automatic convection circulation of ammoniacal liquor in convective tube strengthening tank body is set, increase substantially the coefficient of heat transfer of coil pipe, be conducive to improve the operating efficiency of whole refrigerating plant.

Compared with prior art, the beneficial effects of the utility model are also:

Structural design is ingenious especially, rationally utilizes gas-liquid directly to contact, and realizes the rapid saturation of ammonia steam; Multistage separatory series connection guarantees thorough separated liquid phase; Airflow passes resistance is very little; Simple and the automatical and efficient operation of device structure, has eliminated the impact of liquefied ammonia on two-stage compression to greatest extent, has improved operating efficiency and the service behaviour of compressor, has saved electric power, has extended the service life of compressor; By the automatic convection circulation of ammoniacal liquor in convective tube strengthening tank body is set, increased substantially the coefficient of heat transfer of coil pipe, be conducive to improve the operating efficiency of whole refrigerating plant.

Accompanying drawing explanation

Fig. 1 is the planar structure schematic diagram of novel ammonia refrigeration intercooler.

Fig. 2 is the three-dimensional structure schematic diagram of cyclone.

In figure, each label represents:

1, the overheated ammonia steam pipe compressing from one-level; 2, liquid level gauge; 3, fluid flow tube; 4, liquid level; 5, blade with angle; 6, tubulose urceolus; 7, wireway; 8, go out air sifter cage; 9, division board; 10, flow-stopping plate; 11, air flow path; 12, gas-liquid separator tank body; 13 blast pipes; 14, high pressure ammoniacal liquor outlet; 15, coil pipe; 16, high pressure ammoniacal liquor entrance; 17, convective tube.

The specific embodiment

Now by reference to the accompanying drawings, the utility model is further illustrated.

Novel ammonia refrigeration intercooler, comprises gas-liquid separator tank body 12 as depicted in figs. 1 and 2, is provided with the coil pipe 15 of high pressure ammoniacal liquor heat exchange in intercooler tank body 12, and coil pipe center is welded with the convective tube 17 of tubulose; From the overheated ammonia steam pipe 1 of one-level compression in wireway 7 gos deep into intercooler tank body 12 and the mouth of pipe be provided with out air sifter cage 8, on wireway 7 outer walls, be welded with blade with angle 5, gapped between blade with angle, on blade 5 with angle, be welded with the urceolus 6 of tubulose; In intercooler tank body 12, be provided with division board 9 and flow-stopping plate 10; Division board 9 separates tank body, and ammonia steam can only be risen on the gap between blade with angle; Flow-stopping plate 10 blocks ammonia steam, makes ammonia steam increase by baffling; Division board 9 is provided with the fluid flow tube 3 under shed; Intercooler tank body 12 tops are provided with blast pipe 13 and remove two-stage compression.

Described intercooler tank body 12 is provided with liquid level gauge 2, is convenient to observe and regulation and control liquid level 4.

Intercooler tank body 12 outer walls are provided with heat-insulation layer, prevent that cold runs off.

During work, liquefied ammonia in intercooler tank body 12 is kept to suitable liquid level 4, overheated ammonia steam pipe 1 from one-level compression passes under liquid level and connects and sieve cage 8 through wireway 7, overheated ammonia steam from one-level compression, by 8 diffusions of sieve cage, evenly discharge and contact with liquefied ammonia, realize ammonia vapo(u)rous and overflow liquid level 4, sieve cage 8 has certain distance every bottom, avoids the lubricating oil of disturbance bottom deposition.

Tubulose urceolus 6, a part for blade 5 with angle and wireway 7 outer walls forms cyclone, saturated ammonia steam is in uphill process, be subject to stopping of division board 9, can only enter division board 9 upper stratas by swirler blades 5 gaps, be subject to flow-stopping plate 10 barrier effects and produce baffling, for guaranteeing gas-liquid separation effect, repeat upper strata swirl vane and baffle plate baffling through same structure, produce air flow path 11 as shown in Figure 1.

When ammoniacal liquor face overflows steam, be isolated plate 9 isolation, can only pass through blade 5 Clearance Flow, high-speed gas is forced eddy flow by blade 5, and wherein ammoniacal liquor, in swirling eddy uphill process, is centrifuged and spreads out, and departs from gas phase, realizes gas-liquid separation for the first time.

When swirling eddy is blocked by flow-stopping plate 10, can only walk around by baffling, produce inertia for the second time and stream, turn, realize gas-liquid separation for the second time.

Saturated ammonia steam continues to rise, and repeats the workflow of front twice gas-liquid separation, and the liquefied ammonia of four gas-liquid separations is got back in the liquid phase of tank body lower part by fluid flow tube 3, realizes the complete separation of liquefied ammonia in saturated ammonia steam, finally by blast pipe 13, enters two-stage compression.

Because the interior gas of convective tube 17 forms bubble, rise, thereby the interior ammonia vapour-liquid of convective tube 17 averag density is less than outside cylindrical shell 17, the interior gas liquid mixture of convective tube 17 forms upwelling, and the outer liquefied ammonia of convective tube 17 flows and supplements into cylindrical shell, and convective tube forms the sinking of ammoniacal liquor outward.This function intensified automatic convection circulation of ammoniacal liquor in intercooler tank body that convective tube produces, thereby can directly improve the heat transfer coefficient of coil pipe 15, effectively reduce the temperature that coil pipe inner high voltage ammoniacal liquor enters evaporimeter, be conducive to ammoniacal liquor evaporation and absorb more heats.

Above-mentioned is preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction.Any those of ordinary skill in the art, in the situation that not departing from technical solutions of the utility model scope, all can utilize the technology contents of above-mentioned announcement to make many possible changes and modification to technical solutions of the utility model, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solutions of the utility model,, all should drop in the scope of technical solutions of the utility model protection any simple modification made for any of the above embodiments, equivalent variations and modification according to the utility model technical spirit.

Claims (3)

1. a novel ammonia refrigeration intercooler, comprises intercooler tank body, it is characterized in that: in intercooler tank body, be provided with the coil pipe of high pressure ammoniacal liquor heat exchange, coil pipe center is welded with the convective tube of tubulose; From the overheated ammonia steam pipe of one-level compression in wireway gos deep into convective tube and the mouth of pipe be provided with out air sifter cage, on wireway outer wall, be welded with blade with angle, gapped between blade with angle, on blade with angle, be welded with the urceolus of tubulose; In gas-liquid separator tank body, be provided with division board and flow-stopping plate; Division board separates tank body, and ammonia steam can only be risen on the gap between blade with angle; Flow-stopping plate blocks ammonia steam, makes ammonia steam increase by baffling; Division board is provided with the fluid flow tube under shed; Intercooler tank body top is provided with blast pipe and removes two-stage compression.

2. novel ammonia refrigeration intercooler according to claim 1, is characterized in that: described intercooler tank body is provided with liquid level gauge.

3. novel ammonia refrigeration intercooler according to claim 1, is characterized in that: intercooler tank wall is provided with heat-insulation layer.