DE3917126A1 - METHOD AND ARRANGEMENT FOR REGULATING THE AMOUNT OF STEAM IN DAMPERS OR THE LIKE - Google Patents

Description

The invention relates to a method for regulating the feed amount of steam in steam treatment plants, especially at Dampers or the like with goods provided with steam pipes inlet and outlet locks and an arrangement for through conduct of the procedure.

Steamers usually have a regulated steam supply, as well as a goods inlet and outlet lock through which shot steam is discharged to an outlet of steam through the entry and exit slots into the environment prevent.

The total vapor supplied to the damper is divided into

• 1. Loss steam that is necessary to the on the walls and Heat losses occurring on the floor, whereby the steam condenses compensates,
• 2. Process steam required to treat the one to be treated To heat up well and
• 3. Flushing or excess steam through the exhaust pipes the locks must escape to allow air to enter through the entry and exit slots to prevent that Rinse off with the material in the treatment room gener air and to flush out steam overheating caused by ceiling heating or exothermic heat is caused from the material to be treated.

The regulation of the steam supply to the damper is intended to ensure constant operating conditions in the damper.

The invention is based on the consideration that at the he over the entire width of the damper stretching slit-like openings of excess Flushing steam escapes and through the evaporation pipe over the roof is derived. Is the delivery rate of the steam pipe now greater than the flushing or excess steam from the Treatment room, is additionally through the external goods slit air sucked in from the environment. Ent in the evaporation pipe is then a mixing temperature by the flushing steam and the air sucked in from outside. Now the amount of evaporated pipe-fed steam-air mixture kept constant, then the temperature of this mixture allows conclusions to be drawn the steam feed into the treatment room of the damper. Rising mixture temperature means too much steam feed, falling temperature too little steam feed into the damper.

The invention is now intended to take this into account Considerations the task can be solved, a very special one simple procedure for regulating the amount of steam supplied to create dampers or the like.

To solve this problem, the invention proposes. in the case of dampers with goods inlet and outlet pipes - outlet sluices keep the amount of exhaust steam in the exhaust pipes constant  to keep measuring and depending on their temperature from this temperature the fresh in the treatment room control the amount of steam introduced.

The steam volume control can be done via the mixing temperature controlled in the evaporation pipe of the goods entry or exit lock will. It can be used to control the live steam supply though the temperature of the total amount of exhaust steam can also be measured.

With an arrangement for carrying out the method, this can Exhaust pipe of the goods entry or exit lock at Dampfbe Action room with an adjustable flow rate Exhaust air and a tempera in the drain steam pipe tower measuring transducer can be arranged in the known per se Way via a control unit with the servomotor of a steam valve is connected.

Keeping the conveyed through the steam pipe constant Amount of the steam-air mixture can also be controlled by flap evaporation pipe, with natural thermals, an injector device with steam or air nozzle or a combination of these items can be set.

In the drawing is a schematic representation of an reproduced order according to the invention.  

In the illustration, the steam chamber of a steamer is designated by 10 , at the entrance of which a lock 12 with an exhaust pipe 13 through which the exhaust steam (steam-air mixture) is discharged via the roof is arranged for the web 11 . The entry of steam from the steam chamber 10 and of air from the environment is indicated by arrows. In the example presented an arrangement according to the invention, a vent 14 is arranged in the evaporation tube 13 , which is adjustable to constant flow rate con.

The temperature of the steam-air mixture is measured in the evaporation pipe and fed via a temperature sensor 15 to a control unit 16 , by means of which the servomotor 17 of a steam valve 18 for the supply of live steam is controlled into the steam space 10 of the damper.

When goods stop, change of goods speed, goods quantity weight, as well as fluctuations in the vapor pressure in the network the desired amount of steam is automatically set.

Claims (4)

1. A method for regulating the amount of steam supplied to steam treatment plants, in particular. With steamers or the like. Locking in the goods inlet and outlet with steam pipes, characterized in that the temperature is measured at a constant steam quantity and in dependence on this temperature the in the Treatment room freshly introduced amount of steam is controlled. 2. The method according to claim 1, characterized in that the steam volume control via the mixing temperature in the Ab Steam pipe of the goods entry or exit lock controlled becomes. 3. The method according to claim 1, characterized in that to control the live steam supply, the temperature of the total amount of exhaust steam is measured. 4. Arrangement for performing the method according to claim 1 and 2, characterized in that the exhaust pipe ( 13 ) of the goods inlet ( 12 ) or outlet lock on the steam treatment room ( 10 ) with a constant flow rate an adjustable ventilator ( 14 ) is connected and a temperature sensor ( 15 ) is arranged in the steam pipe and is connected in a manner known per se via a control unit ( 16 ) to the servomotor ( 17 ) of a steam valve ( 18 ).