DD276335A1 - ARRANGEMENT FOR CONTROLLING THE BUBBLE AND COOLANT SUPPLY FOR A WATER LIGHT BLADDER - Google Patents

Abstract

The invention relates to an arrangement for controlling the blowing and cooling agent supply for a Wasserlanzenblaeser, wherein a blowpipe has a centrally arranged inlet part with a connection for the blowing agent and an outer ring chamber with Durchtrittsoeffnungen and a connection for the coolant. In this case, an inner annular chamber is arranged after the inlet part, which has a compression spring having, the inlet part acting on the closure piston, the piston rod is connected to a passage piston acting on the opening. figure

Description

For this 1 page drawing

Field of application of the invention

The invention relates to an arrangement for controlling the Blasmittel- and coolant supply for a water lance blower.

Characteristic of the known state of the art

To avoid overheating of the lance, the water lance blower is withdrawn after operation from the opening of the heat system, so that the hot heat carrier, ζ. As flue gases in the combustion chamber of a steam generator, are derived from the lance.

This procedure requires a complex actuator with leadership for Wasserlanzenbläser and for the hatch of the heat system and a high manual effort.

In another solution, the water lance blowers remain in the blow position and are cooled. The cooling takes place in such a way that ambient air reaches the lance either through the ejector principle or the lance is directly cooled by cooling media. In this case, the tube of the lance on a cooling line, which is connected either to the blast line and to a separate coolant line. The arrangement of the cooling line takes place as an annular gap arrangement or as an arrangement of concentric tubes. The adaptation of the coolant quantity to the temperatures in the thermal system can be controlled only with increased effort.

The arrangement of heat radiation shields or the application of high temperature materials for the lance, although simpler design means, but they are not reliable due to warping and scaling.

For cooling the retracted blowing tube, it is known to form the blowing tube simultaneously as a blowing agent and coolant tube and to achieve an adaptive cooling via a mechanical or electrical control of the blowing and / or coolant line (DD-PS 204531; DE-OS 2952148; PS 917638).

However, these solutions require complex drive and control techniques lead to damage to the blowpipe due to interference and therefore require a separate monitoring.

Other disadvantages of the existing solution are:

- Due to the standing in the blowpipe service water it comes to mineral attachment or encrustation of the tube (bundling of the blow jet is deteriorated).

- During the encrustation or failure of the float enters uncontrolled water in the combustion chamber or runs down the tubes (Thormoscliock).

- The technical solutions are not for steam boilers with overpressure firing, ζ. Β. also fluidized bed firing, suitable.

Object of the invention ι

The aim of the invention is to achieve an oinfacho and secure control of the blowing and coolant supply, which is also used in overpressure firing and ensures sufficient blowpipe cooling.

Explanation of the essence of the invention

The invention has for its object to directly integrate a dependent of the Blasmittelzufuhr control in the water lance blower.

This is achieved in that according to the invention an inner annular chamber is arranged after the inlet part, which has a compression spring having a, the inlet part acting on the closure piston, the piston rod is connected to a the passage openings acting on the closure piston.

embodiment In one embodiment, the invention is explained in detail. The drawing shows a longitudinal section of the blowpipe Coolant supply. The blower tube 18 has the inlet part 1 for the blowing agent water 23, this with counterpart 2, seal 3, Union nut 4 and lock nut 5 is provided. The inserted sealing ring 6 is split led, so that union and Lock nut 4; 5 are separable. After the inlet part 1, the inner annular chamber 11 is formed with the openings 10 in the blower tube 18, the guide sleeve. 8

receives, in which the acted upon by the compression spring 9 piston 7 is arranged with closure member 25 i t.

The piston 7 has via webs 22 the Verschlußkoiben 12, Entdraller 21 and Abströmkegel 13. The webs 22 are

at the same time as Entdraller 21 can be formed.

The openings 16 are incorporated into the outer annular chamber 14, the diodes inlet part 15 for the coolant air 24 has. The blower tube 18 has the inlet cone 19 with nozzle 20. If blowpipe 18, inlet key 19 and nozzle 20 is provided with a double wall (double jacket) for cooling, so is the To arrange closure piston 12 in the shell space of the double wall. The mode of action is the following: If the supply of the blowing agent water 23 is interrupted, the compression spring 9 relaxes, so that the closure piston 12 the Openings 16 and the closure member 25 of the piston 7, the inlet part 1 verschlioßt. About the outer annulus 14 and

the openings 16, the coolant flows air 24 in the retracted blowpipe 18, Einlai fkegel 19 and nozzle 20 and from there into the combustion chamber. As a result, sufficient cooling of the blow pipe 18, inlet cone 19 and nozzle 20 is ensured.

If the blower tube 18 to be operated with the blowing agent water 23, then water 23 flows into the inlet part 1 and moves the Closure member 25, so that over the piston 7, the closure piston 12 is moved in front of the openings 16. This is the supply of the Interrupted coolant air 24 and the supply of the blowing agent 23 via the openings 10 in the blowpipe 18 ensures.?:. In order to avoid water turbulence, the closure piston 12 the Entdraller and the piston pin 7 the Abströmkegel 13 on. The openings 10 for the water passage and the openings 16 for the passage of air are so

dimensioned so that the area is equal to or greater than the area of the exit at the nozzle 20.

The invention achieves the following advantages:

1. Simple and safe, dependent on the water supply control, whose controls are integrated directly into the blowpipe.

2. Blasmittel and coolant are separate Midien, so that the blowpipe in the combustion chamber wall in operating position (corresponds to rest position) may remain. Thus no additional extension and retraction mechanism is required.

3. The blowpipe can also be used in pressurized combustion using the advantages of item 2, without the blowpipe clogged with dirt particles.

4. Saving additional fittings for the reciprocal changeover from blowing to coolant.

Claims (5)

1. Arrangement for controlling the blowing and coolant supply for a water lance blower, wherein a blowpipe has a centrally arranged inlet part with a connection for the blowing agent and an outer annular chamber with passages and a connection for the coolant, characterized t> idurch that after the inlet part an inner annular chamber is arranged, which has a compression spring having a, the inlet part acting on the closure piston, the piston rod is connected to a the passage openings acting on the closure piston. 2. Arrangement according to claim 1, characterized in that the closure piston is provided with a Entdraller. 3. Arrangement according to claim 1, characterized in that the piston rod is provided with a Abströmkegel. 4. Arrangement nanh claim 1 to 3, characterized in that the closure piston is arranged in the interior of the blower tube. 5. Arrangement according to Anbruch 1 to 3, characterized in that the closure piston in the space of a blowing tube surrounding, acted upon by the coolant jacket tube is arranged.