CN104456069A - Tank car pressurizer - Google Patents

Abstract

The invention relates to a pressurizer, and particularly relates to a tank car pressurizer, which comprises a plurality of pressure bearing pipes and fins, wherein each pressure bearing pipe is provided with the corresponding fin which is in a winding manner, each winding fin is 200-250m long, and the pressure bearing pipes are firstly connected with one another in parallel in horizontal rows and then connected with one another in series in longitudinal columns.

Description

A kind of tank car pressurized machine

Technical field

The present invention relates to a kind of pressurized machine, specifically refer to a kind of tank car pressurized machine.

Background technique

The tank car of delivery cryogenic liquid gas comprise storage cryogenic liquid gas storage tank and for for storage tank voltage supply thus the pressurized machine making cryogenic liquid gas discharge from storage tank, described pressurized machine is formed by many pressure-bearing pipe UNICOMs, and every root pressure-bearing pipe is provided with multiple fin; Described mounted temperature liquid gas storage tank comprises inner bag and outer courage, and cryogenic liquid gas is contained in inner bag, and inner bag top is provided with boost port, and inner bag bottom is provided with gas port and air outlet, and described pressurized machine is serially connected on the path that air outlet is connected with boost port.

When cryogenic liquid gas tank car is unloaded, cryogenic liquid gas is flowed into pressurized machine pressure-bearing pipe by air outlet, form air pressure through heat release gasification and enter inner bag by boost port, the final inner bag supercharging to mounted temperature liquid gas storage tank, is pressed into outer low temperature liquid gas storage tank by cryogenic liquid gas.

In prior art, the pressurized machine installed on tank car is eight finned type superchargers (namely every root pressure-bearing pipe being uniformly distributed eight fins), the area of contact of pressure-bearing pipe and air is improved by more fin, further raising enters the amount of vaporization of cryogenic liquid gas in pressurized machine, make the inner bag of pressurized machine to mounted temperature liquid gas tank cause elevated pressures, reduce frosting, icing situation further simultaneously; And in reality tank car when unloading, in tank car, cryogenic liquid gas can not all be unsnatched at once, so eight fin pressurized machines still there will be icing, a cup-like structure is formed at the top due to eight fins, first half frost is made to be difficult to remove, pressure-bearing pipe heat transfer rate is caused to decline, this structure pressurized machine operation a period of time after due to freeze and be difficult to remove, pressurized effect is obviously reduced, after running a period of time, the effective compression portion of pressurized machine is only the fin of pressure-bearing pipe and bottom, and now tank car inconvenience stops unloading defrost.

As can be seen from above structure and description, the problem of prior art: it is slower that supercharger structure causes unloading vehicle speed.

Summary of the invention

For the problems of the prior art, the invention provides one and to unload fireballing high efficient cryogenic liquid gas tank car pressurized machine.

In order to achieve the above object, technological scheme of the present invention is: a kind of tank car pressurized machine, comprise many pressure-bearing pipes and fin, described every root pressure-bearing pipe is provided with fin, described fin is around chip, described is 200-250 rice around chip-type fin length, and described pressure-bearing pipe adopts the first horizontally-arranged parallel connection mode that file is connected again to connect.

Can find out that this practical tool has the following advantages according to such scheme:

The first, compare the fin of dispersion shape around chip-type fin, itself and air contact surfaces amass larger, and pressurized effect eight fins are compared to existing technology better.

The second, through calculating and actual field prospecting discovery, the tank car of 1 cube will be unloaded in 2 hours, adopt and then need 7.69 meters around chip-type fin, tank car volume maximum is at present 30 cubes, about 5% is set in through claimant's error of calculations, when finned length is at 200-250 rice, can ensure that cryogenic liquid gas in tank car was all unsnatched by any tank car in 2 hours, thus effectively raising tank car unloads vehicle speed.

As improvement, the spacing between every horizontally-arranged pressure-bearing pipe is 120-150 millimeter; Effectively avoid the spacial influence that every horizontally-arranged middle pressure-bearing pipe brings to each other.

As improvement, the spacing between every file pressure-bearing pipe is 120-150 millimeter; Reduce vehicle driving resistance, get back to smoothly in tank car after making liquid gasification

As preferably, described around chip-type fin length be 230.7 meters; When adopting finned length to be 230.7 meters as calculated, 30 cubes of tank cars can be unsnatched for 2 hours completely.

As preferably, described every horizontally-arranged middle pressure-bearing pipe is to each other apart from being 120 millimeters, and general tank car width is below 2.3 meters, and this line space design has the spacial influence reducing every horizontally-arranged middle pressure-bearing pipe and bring to each other while can reaching and ensureing air flow property.

As preferably, described every file pressure-bearing pipe is to each other apart from being 140 millimeters, and for the domain height of general tank car, this design can reduce resistance to greatest extent, gets back to smoothly in tank car after making liquid gasification.

As preferably, the every horizontally-arranged 10 pressure-bearing pipes in parallel of described pressurized machine, utilize tank car bottom space to greatest extent.

As preferably, the every file of described pressurized machine is 2 root pressure-bearing pipes, utilizes tank car bottom space to greatest extent.

Accompanying drawing explanation

Accompanying drawing 1 is tank car supercharger structure schematic diagram of the present invention.

Shown in figure: 1, pressure-bearing pipe, 2, fin.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further described.

A kind of tank car pressurized machine, comprise many pressure-bearing pipes 1 and fin 2, described every root pressure-bearing pipe 1 is provided with fin 2, described fin 2 is around chip, described around chip-type fin 2 length be 200-250 rice, because tank car is in reasons such as highway long-distance transports, its volume is subject to certain restrictions, usually pressurized machine can be arranged on the bottom of tank car, width is also restricted, so described pressure-bearing pipe 1 adopts the first horizontally-arranged parallel connection mode that file is connected again to connect, pressurized machine being set in width direction parallel connection 10 is a row around chip-type fin, spacing between every horizontally-arranged pressure-bearing pipe is 120-150 millimeter, concrete spacing is 120 millimeters, effectively can avoid the spacial influence that other Pipe installing brings, short transverse is two rows, spacing between every file pressure-bearing pipe is 120-150 millimeter, namely spacing is between row and row 120-150 millimeter, concrete spacing is 140 millimeters, resistance can be reduced to greatest extent, get back to smoothly in tank car after making liquid gasification.

Inventor according under normal state, the operating mode of the tank car of the loading cryogenic liquid gas of 1 meter 3:

1. time per unit storage tank lifting rate:

G _o＝V _o″×ρ _o″

V _o"--lifting rate (refer to lay down the amount of liquid in tank car, and under changing into standard state), Nm3/h;

ρ _o"--the mark state proportion of cryogenic liquide, Kg/Nm3;

2. the volume of lifting rate under working state:

V′＝Go×v′

V '--saturated liquids specific volume under working pressure, L/Kg;

3. the saturated vapour amount need augmented to storage tank per hour:

$G^{\′\′}=\frac{V^{\′}}{v^{\′\′}}$

V "--the specific volume of saturated vapour under working state, L/Kg;

4. the saturated vapour amount of supplement needs again the liquid capacity of consumption:

V _z′＝G″×v′

5. the saturated vapour amount augmented again again:

${\mathrm{Gz}}^{\′\′}=\frac{{\mathrm{Vz}}^{\′}}{v^{\′\′}}$

Circulation like this is gone down n time.

:

V _zn′＝G _n-1″×v′

${G_{\mathrm{zn}}}^{\′\′}=\frac{{V_{\mathrm{zn}}}^{\′}}{v^{\′\′}}={G_{n-1}}^{\′\′}\×\frac{v^{\′}}{v^{\′\′}}$

This be one with wait ratio geometric ratio number of poles sum, its each entry value is: a=a1 × q ⁿ,

$V_o\×{\left(\frac{v^{\′}}{v^{\′\′}}\right)}^1+V_o\×{\left(\frac{v^{\′}}{v^{\′\′}}\right)}^2+......V_o\×{\left(\frac{v^{\′}}{v^{\′\′}}\right)}^n+......$

Itself and value are:

$\mathrm{\ζ}=a1\frac{1-q^n}{1-q}=V_o\left(\frac{v^{\′}}{v^{\′\′}}\right)\left[\frac{1-{\left(\frac{v^{\′}}{v^{\′\′}}\right)}^n}{1-\left(\frac{v^{\′}}{v^{\′\′}}\right)}\right]$

N value is got larger, then more accurate; In present applications ' the tail must be taken, n gets 5 enough accurate.

6. the tolerance should augmented is G:

$G=V_o\×\frac{v^{\′}}{v^{\′\′}}\left[\frac{1-{\left(\frac{v^{\′}}{v^{\′\′}}\right)}^5}{1-\left(\frac{v^{\′}}{v^{\′\′}}\right)}\right]\≈60\mathrm{Nm}3/h$

7. heat exchange area calculates:

7.1 heat loads:

q1＝1213.44 Kcal/h

q2＝2511.42 Kcal/h

q3＝196.01 Kcal/h

Q＝3920.87 Kcal/h

7.2. to conduct heat mean temperature difference:

T _m＝164.39 K

7.3. mean heat transfer coefficient:

K=4.3 Kcal/ rice ².h.k

7.4. heat exchange area:

$S=\frac{Q}{K\mathrm{}{T}_m}={5.38m}^2$

The known heat exchange area 0.7m around chip-type fin ², obtain 5.38/0.7=7.69 rice, that is: work as 1m ³liquid is laid down from tank car, needs the pressurized machine of 60Nm3/h size, and it needs around chip-type fin length about 7.69 meters.

Then according to the design of 7.69 meters, current maximum volume tank car is generally 30 cubic metres, then adopt around chip-type fin length be 200-250 rice, width direction parallel connection simultaneously 10 is a row around chip-type fin, spacing between every horizontally-arranged pressure-bearing pipe is 120-150 millimeter, concrete spacing is 120 millimeters, effectively can avoid the spacial influence that other Pipe installing brings, short transverse is two rows, spacing between every file pressure-bearing pipe is 120-150 millimeter, namely spacing is between row and row 120-150 millimeter, concrete spacing is 140 millimeters, can reach completely and be no more than original eight finned type supercharger volumes, be convenient to tank car install, can ensure that the cryogenic liquid gas that within 2 hours, tank car loads all is unloaded complete simultaneously.

Inventor obtains following data by field investigation:

Horizontally-arranged pressure-bearing pipe distance to each other	File pressure-bearing pipe distance to each other	Rich leaf length	Unload the time
				120 millimeters	120 millimeters	200 meters	180-200 minute
120 millimeters	120 millimeters	230 meters	150-160 minute
				120 millimeters	120 millimeters	250 meters	170-190 minute
140 millimeters	140 millimeters	200 meters	160-180 minute
				140 millimeters	140 millimeters	230 meters	110-140 minute
140 millimeters	140 millimeters	250 meters	140-155 minute

150 millimeters	150 millimeters	200 meters	170-190 minute
				150 millimeters	150 millimeters	230 meters	150-160 minute
150 millimeters	150 millimeters	250 meters	160-170 minute

Through Site Detection, inventor is different for age through too much car, and vehicle condition is different, and when outdoor temperature is different, its data error, about 10%, has general applicability.

Be understandable that, above about specific descriptions of the present invention, the technological scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.

Claims (8)

1. a tank car pressurized machine, comprise many pressure-bearing pipes (1) and fin (2), described every root pressure-bearing pipe (1) is provided with fin (2), it is characterized in that: described fin (2) is around chip, described is 200-250 rice around chip-type fin (2) length, and described pressure-bearing pipe (1) adopts the first horizontally-arranged parallel connection mode that file is connected again to connect.

2. tank car pressurized machine according to claim 1, is characterized in that: the spacing between every horizontally-arranged pressure-bearing pipe is 120-150 millimeter.

3. tank car pressurized machine according to claim 1, is characterized in that:, the spacing between every file pressure-bearing pipe is 120-150 millimeter.

4. tank car pressurized machine according to claim 1, is characterized in that: described around chip-type fin (2) length be 230.7 meters.

5. tank car pressurized machine according to claim 1, is characterized in that: described every horizontally-arranged middle pressure-bearing pipe (1) to each other distance is 120 millimeters.

6. tank car pressurized machine according to claim 1, is characterized in that: described every file pressure-bearing pipe (1) to each other distance is 140 millimeters.

7. tank car pressurized machine according to claim 1, is characterized in that: the every horizontally-arranged 10 pressure-bearing pipes (1) in parallel of described pressurized machine.

8. tank car pressurized machine according to claim 1, is characterized in that: the every file of described pressurized machine is 2 root pressure-bearing pipes (1).