SE2030277A1 - Liquid substance sampling device - Google Patents

Abstract

The present invention relates in part to a method of transferring from a pipe (25) with flowing substance, usually under high pressure and temperature via an outlet (26), a given amount of substance via pipe (28) to a cooler (24). cool the sample quantity in the cooler to the desired pressure and temperature, transfer the sample quantity via pipe (4) to a sample can (12) fill, close and flush the sample can in a closed sampler (23) and a device for carrying out the process.

Description

Sampling device for flowing substance In the chemical industry, several samples are regularly taken in close succession of substances in different positions from manufacturing. The samples are analyzed and the results verify whether the process control is correct or not. The device for removing thick liquor is mentioned in the Swedish patent specification SE 513 792 as enabling sampling of a substance with a temperature of 135-145 ° C and a pressure of 1000 kPa. The sample substance is cooled to a temperature of 40-50 ° C, finally the sampled amount is dropped into an open collecting vessel.

Burns are caused by tissue being exposed to temperatures above 42C °, but other types of energy can also lead to the same type of damage to the tissue, for example in contact with different types of chemicals and exposure to harmful gases.

The present invention primarily offers increased protection for the operator during sampling.

Other advantages are that the pressure and temperature of the test substance only need to be lowered to a level when flashing ceases, usually slightly below 100 ° C. This reduces the risk that the chemical and physical properties of the test change.

A known device for sampling is shown in the German patent specification DE 10 2005 022 966 which has a test chamber with a door which is closed with 4 knobs. The test can is filled and sealed in the test chamber with a threaded lid which is pressed and turned on via a vertical shaft by the operator through a knob outside the test chamber and thus meets antiseptic requirements.

The sample can of the present invention may well be closed in the above manner, with a screw cap, but may also be replaced with another type of cap which is only pressed into place. Another embodiment is to replace the sample jar with a disposable bag. The blank is preferably made of plastic stored in a roll from which the bag is separated and placed in a suitable sample can holder.

In the test room after filling, the bag is sealed with a weld. An established method through electrically heated welding jaws that provide pressure and heat.

Sampling procedure Figures 1a and 1b Sampler (23), constituent parts From a pipe (1) with flowing substance whose temperature is preferably below 100 ° C, via a socket (2) and valve (3) which enables the supply of sample substance through pipes (4 ) to a sampling space limited by lids (5) and lower part (17).

Pipe (6) for gas evacuation of the sampling space (21).

Pipes (7) and rinsing nozzles (8) that atomize rinsing water for cleaning.

The shaft (9), the upper end of which is provided with a handle (10), the lower end consists of a sample can holder (11) which is adapted to a sample can (12). Figure 1c shows the three different positions of the sample can holder position "A and B" in the closed sampling space (21) and position "C" in the open sampling space (22).

Sample jar (12) consists of lid (13) provided with an opening (14) which is closed with an internal door (15) suspended in a shaft (16) which via a prestressed spring (not shown) seeks to close the door. When the substance (4) exiting the effluent (4) hits the hatch (15), the spring force is overcome, the hatch opens to close again when the sample jar is filled and the jet of substance ceases. The function can be compared to a non-return valve.

The lower part (17) consisting of a cylindrical tube, where the lower part is designed as a funnel with outlet (18) connected to drain (not shown).

The lower part (17) is made wholly or partly of borosilicate glass or other transparent material.

Lid (5) and lower part (17) can be compressed along the sealing surface (19) when a final sampling space (21) according to figure 1a is obtained.

- Lid (5) and lower part (17) can be separated by the movement (20) when an open sampling space (22) according to figure 1b is obtained.

Figures 1b and 1c Samples (23) are prepared Lids (5) and lower part (17) are separated (20), the sampling space is opened (22). By turning the handle (10), via shaft (9), the sample can holder (11) becomes accessible, position "C" according to figure 1c. The sample can (12) with lid (13) is placed manually in the sample can holder (11).

Conversely, turn the handle (10), via shaft (9), the sample can holder (11) with sample can (12) and sample can lid (13) to position “A” according to figure 1c.

Figure 2b Sampler (23) ready for sampling The sampling space is closed (21) by pressing the lid (5) against the lower part (17).

Figure 2a Cooler (24) is prepared for sampling From tubes (25) with flowing substance that require cooling under pressure to counteract flashing during the filling of the sample can (12), a suitable amount of sample substance flows, via a socket (26), the valve (27), via pipes (28) to coolers (24) consisting of a cylindrical pipe (29) with two ends (30 and 31) joined by fastening elements (32). Inside the cylindrical tube (29) runs a movable piston (33) provided with a seal (34) which creates two separate chambers, lower (35) and upper (36). The upper chamber (36) is filled with air under pressure via pipe (37) by opening valve (38) towards pipe (39). The lower chamber (35) is drained on air to the open air by opening valve (40) via pipe (4) ) and pipes (6) gas evacuation. Piston (33) is pressed downwards against end (30). All valves close.

Figures 3a and 3b Sampling begins Valve (27) opens and sample substance from pipe (25), via outlet (26) is pressed via pipe (28) fills lower chamber (35) and further out through the partially open valve (40) and opens through pipe (4) where flashing occurs. Gas is evacuated from the closed test chamber (21) through pipes (6) and liquid through outlet (18). When it is ensured that the content of the flow of sample substance is representative, which the operator determines ocularly through the transparent lower part (17), then the valve (40) is closed.

Figures 4a and 4b Filling and cooling in coolers (24) Lower chamber (35), the filling is filled with substance under pressure via pipes (28) by gently opening valve (41) which allows drainage of air to the outside via pipes (37 and 42). When the pressure in the lower chamber (35) exceeds the pressure in the upper chamber (36), the piston (33) begins to move upwards and reaches the end (31). When the chamber (35) is filled with substance, the valves (27 and 41) are closed. The cylindrical pipe exterior (29) is surrounded by a sweep (43) which forms a closed jacket filled with flow-through coolant via pipes (44 and 45). A supplement (not shown) with a conventional equipment for controlling and regulating the temperature of the substance, facilitates the regulation of the cooling.

Figure 5a Filling of sample jar (12) When the substance has cooled down to the desired temperature then valve (38) is opened towards pipe (39), the upper chamber (36) is filled with air under pressure via pipe (37). The lower chamber (35) is emptied of substance through an open valve (40) and via pipes (4). Piston (33) is pressed downwards against end (30). The flow through pipes (4) is visually controlled through the transparent lower part (17) by the operator. When the jet from the pipe (4) is judged to be representative, the sample jar (12) is filled by turning the handle (10), via shaft (9), via the sample jar holder (11) to position "B". When the sample jar is full, turn the handle (10) again, via shaft (9), the sample jar holder (11) with sample jar (12) to position "A" and close the valve (40).

Figure 6 The sample jar (12) is flushed clean. The filled sample jar (12) is cleaned via a pipe (7) and nozzle (8) with finely divided rinsing water (valve not shown).

Figure 7 Sample jar (12) clear Lid (5) and lower part (17) are separated (20), the sampling space (22) is opened. The handle (10) is rotated, via shaft (9), the sample can holder (11) with sample can (12) to position "C".

The filled, closed and cleaned sample jar (12) is manually lifted out of the sample jar holder (11).

The suspensions of the sampler lid (5) and lower part (17) with associated details are not shown, menolic variants of attachments to the wall or floor are possible.

The vertical movement of the sampler (20), in particular the lower part (17), requires mechanical control in the form of non-linear devices which may vary, but must meet certain measures of precision and stability in order to achieve the desired effect in the sealing surface (19). The same applies to the method of achieving the movement (20), through force possibly supplemented with a coil spring for balancing. The possibility of use pneumatics, hydraulics or electric drive is also available.

The seal (34) is shown as an O-ring and the piston (33) is made in one piece. Implied that both details are adapted to the substance and temperature that is relevant. It is important that no transfer of substance occurs via piston (33) between lower (35) and upper (36) chambers. The piston (33) is made divisible, which enables the use of other types of seals (34) which can consist of several different parts and materials. Connections of water for flushing the inside of the radiator (24) are not shown.

A further embodiment of the invention is that all steps of the test cycle, or parts there, are de-automated by installing electrically or pneumatically controlled valves, temperature, pressure, position sensors and servomotors. The sequences are stored in and controlled by a programmable control system a so-called PLC.

Figure 1a, it is possible to supply substance from a plurality of pipes (1) each with its outlet (2) and valve (3) connected by branching of pipes (4) to the test device.

Claims (9)

1. Method for transferring from a tube (25) with flowing substance under high pressure and high temperature an appropriate amount of cooled sample substance to a sample jar, wherein the method comprises lowering the pressure and temperature of the sample substance by means of a cooler (24); to transfer the sample substance from the cooler (24) to the sampler (23) via a pipe (4), fill the sample jar (12); use a closure device (15) to close the sample jar (12); using flushing water, the filled and sealed sample jar is externally characterized by the fact that the sample jar is underfilled, sealed and rinsed in a closed sampling space (21). 2. Sampling device (23) with lid (5) fitted with pipe (4) supply of substance, fitted with pipe (6) for gas evacuation, fitted with pipe (7) supply of flushing water, fitted with shaft (9) whose upper end is provided with a handle (10) and the lower end consists of a sample jar holder (11), which can turn the sample jar (12) via shaft (13) to different positions, characterized by a closed sampling space (22) consisting of a lid (5) and lower part ( 17) which is vertically movable between two end positions, closed test chamber (21) and open test chamber (22). 3. Device for sampling (23) according to patent claim 2, characterized in that when the jet from pipe (4) opens the sample jar lid (15), the sample jar (12) fills by turning the handle (10), via shaft (9), via the sample jar holder (11) ) to position "B", when the sample jar is filled, turn the handle (10) again, via shaft (9), the sample jar holder (11) with sample jar (12) to position "A" and valve (40) closes. 4. Device for sampling (23) according to patent claim 2, characterized by cleaning the sealed sample can via pipe (7) and nozzle (8) with flushing water. 5. Device for cooling (24) which consists of a cylindrical tube (29) with two ends (30 and 31), inside the cylindrical tube (29), there is a movable piston (33) which creates two sealed separate chambers, lower ( 35) and upper (36), characterized by the outside of the cylindrical tube (29), surrounded by a sweep (43) which forms a closed jacket filled with flowing coolant via tubes (44 and 45). 6. Device for cooling (24) according to patent claim 5, characterized in that the upper chamber (36) is filled with air under pressure via pipe (37) by opening valve (38) against pipe (39), while the lower chamber (35) is drained on air to the open air by opening valve (40) via pipe (4) and pipe (6), whereby piston (33) reaches end (30). 7. Device for cooling (24) according to patent claim 5, characterized by, when valve (27) is opened and sample substance from tube (25) is pushed via tube (28) fills lower chamber (35) and further through the partially open valve (40) and mouths through pipe (4) where flashing occurs and the gas is evacuated from the sample chamber through pipe (6) and liquid through outlet (18), then close valve (40). 8. Device for cooling (24) according to patent claim 5, characterized by lower chamber (35), filling is completed with substance under pressure via pipe (28) by opening valve (41) which allows drainage of air to the open air via pipe (37 and 42), when the pressure in the lower chamber (35) exceeds the pressure in the upper chamber (36), the piston (33) starts to move upwards, reaches the end (31), then the chamber (35) is filled with substance, then the valves (27 and 41 ), valve (40) is opened, the flow is led via pipe (4), on to sampler (23). 9. Device for cooling (24) according to patent claim 5, characterized in that when the substance has cooled down in the lower chamber (35) to the desired temperature and pressure, the valve (38) is opened against the pipe (39), the upper chamber (36) is filled with air under pressure via pipe (37). Lower chamber (35) empty substance by opening valve (40) via tube (4), piston (33) is pressed downwards against end (30) sample jar (12) is filled by turning handle (10), via shaft (9), via the sample jar holder (11) to position "B", the handle (10) is turned again, via shaft (9), the sample jar holder (11) with sample jar (12) to position "A" and valve (40) is closed.