JPS58217101A - Electric steam generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an electric steam generator for the purpose of supplying soot-blowing steam to a heat-medium waste gas heater in a ship employing a heat-medium heating system without any steam generator. It concerns the generator.

On a ship, heat is generally recovered from the waste gas of the main engine using an exhaust gas boiler or a heating medium type exhaust gas boiler, and is used for heating each of the internal equipment on the ship. Under these current circumstances, high-pressure water or high-pressure air is generally used to clean soot from heat-transfer type exhaust gas heaters on ships that do not use any steam generators at all and are equipped with only heat-medium heating systems. It's a target'. However, in addition to the efficiency of soot removal, the conventional method required an increase in capacity with limited equipment, and also had to be complicated to obtain.

In view of the above points, the present invention is configured to generate steam using a clean water line installed in a ship and electricity, and automatically clean the heat transfer surface of a heat transfer type exhaust gas heater. This is an electric steam generator featuring:

The non-invention will be explained based on the drawings. The figure is an explanatory diagram regarding the electric steam generator in the present invention. 1 in the figure indicates that the electric steam generator is not working. 2 is an electric generator ;(
This is an electric heater inserted into the main body 1, and the main body A of the electric steam generator is always in a energized state, that is, the inside of the main body 1 of the electric steam generator is in a heated state. , 5 is the electric steam generator main body 1
An electric water supply valve 6 is inserted in the middle of the water supply pipe 5.The upstream side of the water supply pipe 5 is connected to a clean water line inside the ship (not shown), and is always pressurized. It is in the (feeding 4ζ possible state). 9 is a heat transfer type exhaust gas heater that uses exhaust gas from the ship's main engine and auxiliary hoe. 3: Soot on the heat transfer surface of the heat medium type exhaust gas heater (steam pipe used to remove soot from the heat transfer surface of the heat medium type exhaust gas heater) A steam electric valve 4 or j is installed in the middle of the steam pipe 3. 7 is a water level detection device; When the current position in the steam generator body is detected, the electric water supply valve e (sends this signal,
The valve is configured to close the motor-operated valve. 8 is a steam pressure switch, which is attached to the steam part of the electric steam generator main body 1, and when it detects a pressure higher than the high setting pressure, it sends a signal to the steam electric valve 4 to open it, t, , ”!
At L L, the soot (
Perform hanging removal. If the pressure below the low set pressure is detected, the steam electric valve 4 will be closed and soot removal will be stopped.
(Open the electric valve 6 and supply steam to the electric steam generator main body 1 at the pressure of the steam line (not shown).

Next, the effect will be explained. At the time of start-up, the electric heater 2 is energized and at the same time a pressure signal below the low set pressure is issued from the pressure switch 8 to open the water supply electric valve. When the water level in the aroma steam generator 1 rises and the water level detection device 7 detects the water level, a signal is sent to the electric water supply valve 6 to close the valve and stop water supply.

During this time, the steam inside the electric steam generator is being heated by the electric heater 2. Thus, the vapor pressure within the electric generator main body 1 gradually increases. When the steam pressure exceeds the high setting pressure, a signal is issued from the steam pressure switch, the steam electric valve is opened, and the steam in the electric steam generator main body 1 and the steam generated by self-evaporation are transferred to the heat transfer surface of the exhaust gas heater as a heat medium. Spray to remove soot. Steam is supplied for soot cleaning, and when a steam pressure switch detects a pressure below a low set pressure, a signal is sent to the steam motor operated valve 4 and the water supply motor operated valve 5. The steam electric valve 4 is closed to stop cleaning the soot on the heat transfer surface of the heat medium type exhaust gas heater, and the water supply electric valve 6 is opened to resume water supply.

Thereafter, the water level detection rod and the steam pressure switch are used to repeat the above-mentioned operation of the trowel in a fixed cycle (for example, at intervals of 10 hours or 20 hours, depending on the appropriate combination of heater capacity and retained volume).

As explained in detail above, the present invention provides an electrically heated steam generator with an electric water supply valve and a steam safety valve, and uses a water level detection rod and a pressure switch to automatically supply water and remove steam at regular intervals. It made it possible.

According to the present invention, it is possible to provide an electric generator which has a simple structure and can be easily installed for removing soot from a heat medium type waste gas heater employed in a ship.

[Brief explanation of the drawing]

The figure is an explanatory diagram regarding the electric type @ki-shaka device according to the present invention. The main body 2 of the electric steam generator is the electric heater 3, the steam pipe 4, the steam electric valve 5, the water supply pipe 6, the water supply electric valve 7, the water level measuring device 8, the steam pressure switch 9, the heat medium type exhaust gas heater

Claims (1)

[Scope of Claims] The following means: An electric steam generator main body 1 installed in the fresh water line A of a ship, which is inserted into the electric steam generator main body 1 and is constantly energized while the electric steam generator is in operation. an electric heater 2 which is in a heating state, that is, a heating state; a steam electric valve 4 installed in a steam pipe 3 piped from the steam section of the electric steam generator main body 1 to the load side; A water supply motorized valve 6, which is piped to the bottom of the generator main body 1 and provided on the company-supplied bottom pipe 5A, is an electric steam generator main body 1.
A water level detection device 7, which is inserted into the water level control section of the water level control unit and emits a signal to close the electric water supply valve 6 when the water level is detected; An electric steam generator 5 characterized in that it includes a pressure switch 8 which issues a signal to open the steam motorized valve 4 if the pressure is lower than the lower set pressure, close the steam motorized valve and open the water supply motorized valve if the pressure is lower than the lower set pressure.