JPS5823049Y2 - Once-through boiler concentrator water blowing equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a concentrating can water blowing device in a multi-tubular once-through boiler.

In a typical multi-tubular once-through boiler, the amount of water held in the wood pipe section and the water amount held in the lower header is about the same, and the blow outlet is usually installed at the bottom of the lower header (icehouse). be.

By the way, once-through boilers have to be frequently blown because the water in the can is highly concentrated.

It is desirable to perform a full blow (drain all of the can water), but from the standpoint of heat loss or the inability to stop the boiler, half-blow (drain about half of the can water) is often done. .

Therefore, when half-blowing is performed, since the blow pipe serves both full blow and half blow, the blow pipe installation port is located at the bottom of the lower pipe header, so the highly concentrated canned water in the water pipe section is hardly blown, and the lower pipe There was a drawback that clean, non-concentrated water from the water supply was blown out.

In view of the above-mentioned drawbacks, this invention was designed to prevent unconcentrated canned water from being blown out and to blow as much concentrated canned water in the wood pipe section as possible, and to In a multi-tube once-through boiler in which the lower pipe header (ice room) is connected with a large number of wooden pipes, the lower pipe header (ice room)
An inner pipe is provided in the vicinity of the wood pipe connection part, one or more water supply ports are provided in the inner pipe, the inner pipe is connected to a water supply pipe provided outside the lower header, and the water supply pipe is branched from the water supply pipe. This concentrated can water blowing device is characterized in that a blow pipe is provided in the inner pipe, a blow valve is attached to the blow pipe, and the water is blown from a water supply port provided in the inner pipe.

An embodiment of this invention will be described below based on the drawings. An annular upper header (steam room) 1 is provided above the boiler, and a similarly annular lower header (ice room) 2 is provided below.

These upper and lower headers 1 and 2 are connected by a large number of vertical water pipes 3.

Inside the lower pipe header (icehouse) 2, there is an inner pipe 4 close to the wood pipe connection part.
is provided in a ring shape.

One or more water supply ports 11 are provided in the inner pipe.

7 is a water supply pipe provided outside the lower header 2 and communicates with the inner pipe 4.

5 is a water supply pump, and 6 is a check valve, which is provided in the water supply pipe.

A blow pipe 8 is provided branching off from the water supply pipe 7, and a blow valve 9 is attached to the blow pipe 8.

10 is a support rod for the inner tube 4.

Although not shown, a blow pipe for all blows is of course provided below the lower header.

To explain the operation, water is supplied from the inner pipe 4 by the water supply pump 5 during boiler operation, and when the boiler is in operation, water is supplied from the inner pipe 4, water supply pipe 7, and blow pipe 8 through the water supply port 11 provided in the inner pipe 4 by the water pressure in the header. The air is then blown from the blow valve 9.

As explained above, this design uses the inner pipe for both water supply and blowing, and is configured so that half of the water is blown from the water supply port provided in the inner pipe, so that the concentrated water in the water pipe above the water supply port is removed. Can blow.

This idea is very effective for half blowing.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of this invented boiler, FIG. 2 is a cross-sectional view of a lower header equipped with this invented blow device, and FIG. 3 is a view taken along the line A--A in FIG. 2. 1 is an upper header, 2 is a lower header, 3 is a water pipe, 4 is an inner pipe, 5 is a water supply pump, 6 is a check valve, 7 is a water supply pipe, 8 is a blow pipe, 9 is a blow valve, 10 is a support Rod, 11 is the water supply port.

Claims (1)

[Scope of utility model registration request] In a multi-tube once-through boiler in which an upper header (steam room) 1 and a lower header (ice room) 2 are connected by a large number of water pipes 3, an inner pipe is installed in the lower header (ice room) 2 near the wood pipe joint. 4, one or more water supply ports 11 are provided in the inner pipe 4, the inner pipe 4 and the water supply pipe 7 provided outside the lower header are communicated, and the blow pipe 8 is branched from the water supply pipe 7. A concentrated can water blowing device characterized in that a blow valve 9 is attached to a blow 8 pipe, and the water is blown from a water supply port 11 provided in an inner pipe 4.