CN2443949Y

CN2443949Y - Granulator for dry ice pill

Info

Publication number: CN2443949Y
Application number: CN00251749U
Authority: CN
Inventors: 匡继勇; 吴志明
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2000-09-22
Filing date: 2000-09-22
Publication date: 2001-08-22
Anticipated expiration: 2010-09-22

Abstract

The utility model relates to a granulator for dry ice pellets. Both ends of an ice pressing chamber are respectively provided with a piston and a die head, wherein, the circumference of the ice pressing chamber is provided with a sieve hole which is provided with a flow preventing layer and a cover casing which is provided with a gas escape valve; the circumference of the ice pressing chamber is also provided with inlet valves for liquid CO2; a rotating blade is arranged in one end cover of the die head, and the end cover is provided with an inlet valve for gas CO2 and a discharge port. The liquid CO2 with certain pressure is throttled to the ice pressing chamber, and solid snow-shaped dry ice can be cut into the dry ice pellets by the rotating blade through the die head. The utility model uses symmetrical jet throttling to cause dry ice granules to be formed in a density uniform way, uses the flow preventing layer and a balancing chamber to reduce drift loss of the dry ice and to enhance liquid and solid conversion rate of the CO2, and is favorable for safety production.

Description

The dry ice pellets tablets press

The utility model relates to the producing apparatus of dry ice.

In the prior art field, dry ice cleaner provides special-purpose dry ice particles, and the dry ice particles that provides of industries such as food, ocean, fire-fighting, all is to adopt liquid CO basically ₂Direct freezing dry ice lumps, or liquid CO ₂Throttling Cheng Xuezhuan dry ice is pressed into dry ice by forming press then and determines, and with ice breaker dry ice lumps is whittled into dry ice particles at last.The aforesaid method required equipment is comparatively heavy, and processing method is also loaded down with trivial details, and the size of dry ice particles is difficult to guarantee and yield is lower.

The purpose of this utility model provides a kind of compact construction, and is easy to operate, can control the dry ice particles size.And CO ₂The dry ice pellets tablets press that liquid-solid turnover ratio is higher.

In order to achieve the above object, the technical solution adopted in the utility model is: the end in pressing icehouse is equipped with the piston that is driven by oil press, press the interior the other end of icehouse that the die head of many small through hole is housed out, press the first-class branch of icehouse circumference to have sieve aperture, sieve aperture is equipped with impermeable barrier outward, it is outer and form air cavity that the case that the gas evolution valve is housed is contained in impermeable barrier, and pressing on the circumference of icehouse also, symmetry is equipped with liquid CO ₂Inlet valve, die head are equipped with end cap outward, and the rotating blade by driven by motor is housed in the end cap, and gas CO is housed on the end cap ₂Inlet valve and discharge port.

The utility model compared with prior art, the advantage that has:

1) owing to adopt symmetry to spray throttling, makes that the dry ice particles compact density is even;

2) adopt impermeable barrier and counter balance pocket, make established snow shape dry ice fly away loss and significantly reduce, improved CO ₂Liquid-solid turnover ratio, cost reduces significantly;

3) die head can for convenience detach and die change, makes the dry ice particles size be convenient to control;

4) adopt counter balance pocket, can conveniently carry out blowback and wash, avoided ice-bound superpressure explosion hazard to take place, helped safety in production;

5) compact construction takes up an area of for a short time, and it is low to consume energy.

Below in conjunction with accompanying drawing, the utility model is described in detail.

Accompanying drawing is a structural representation of the present utility model.

As shown in drawings, the liquid CO that has certain pressure₂From pressing the liquid CO of icehouse 6 symmetries₂Inlet valve 10 throttlings are to pressing in the icehouse 6, and the gas that wherein generates enters in the case 13 by sieve aperture 8 and impermeable barrier 7 Air cavity 9 enter atmosphere by the gas escape valve 14 on the case 13, or send into compressor and recycled; When at the solid CO of q.s that pressed icehouse 6 interior productive sets₂The time, starting hydraulic press 12, piston 11 is to reach Moving, the snow shape dry ice of solid is pressed into hard strip dry ice by die head 5 extrudes; In compression process, Start motor 1 rotating blade 4 in the end cap 2 is rotated, the strip dry ice of extruding is sheared becomes dry ice particles, Be packaged into case by discharging opening 15.

In throttling process, open and be contained in gas CO on the end cap 2₂Inlet valve 3 makes end cap (counter balance pocket) 2 In have certain pressure, in order to avoid snow shape dry ice flies away loss by die head 5.

The small through hole of die head 5 be shaped as conical bore outside in the self-pressure icehouse and the combination of cylindrical hole.

Embodiment: make with the stainless steel of φ 150mm as pressing icehouse, long is 800mm, and impermeable barrier adopts fine and closely woven mesh screen, and on the outer wall of pressing icehouse, die head can make series, so that obtain the dry ice particles of different diameter equably.Operating pressure is 20MPa, and throughput is 230kg/h, motor output rating 15KW, and overall dimension is about long 2500mm, wide 1200mm, high 2000mm.

Claims

1. dry ice pellets tablets press; it is characterized in that: the end in pressing icehouse [6] is equipped with the piston [11] that is driven by oil press [12]; press the interior the other end of icehouse [6] that the die head [5] of many small through hole is housed out; press the first-class branch of icehouse [6] circumference to have sieve aperture [8]; the outer impermeable barrier [7] that is equipped with of sieve aperture [8]; it is outer and form air cavity [9] that the case [13] that gas evolution valve [14] are housed is contained in impermeable barrier [7]; go back symmetry on the circumference of pressure icehouse liquid CO 2 inlet valve [10] is housed; the outer end cap [2] that is equipped with of die head [5]; the rotating blade [4] that is driven by motor [1] is housed in the end cap [2], and end cap is equipped with gas CO on [2] ₂Inlet valve [3] and discharge port [15].

2. dry ice pellets tablets press according to claim 1 is characterized in that: the conical bore outside in the icehouse and the combination of cylindrical hole are pressed in being shaped as of the small through hole of die head [5] certainly.