Introduction; Description; Operating Principles - CleaverBrooks CEJS Installation, Operation And Maintanance

1 - INTRODUCTION

This manual contains descriptive, maintenance, operating, and parts information for the Cleaver-
Brooks Electrode Steam Boiler Model CEJS. The CEJS is a three-phase four-wire high voltage steam-
producing boiler with automatic control and limiting functions.

1.1-Description

The CEJS Electrode Steam Boiler is several systems integrated into a single unit to function as a
heating system. The several systems making up the boiler are:
• The electrodes
• The circulating system (piping)
• The pressure vessel
• The control system

1.2-Operating principles

Electrode boilers utilize the conductive and
resistive properties of water to carr y
electric current and generate steam. The
e l e c t r i c c u r r e n t f l o w s b e t w e e n t h e
energized electrode and the two neutral
points, the nozzle stock and the counter
electrodes. The water streams are the
conductors.
Since water has electrical resistance, this
current flow generates heat directly in the
water itself. As current flow increases,
more heat is generated and more steam is
produced.
Figure 1 is a typical boiler configuration, It
is shown for the purpose of this explanation
only. The actual configuration of your
model will be found on the drawings which
accompany the boiler.
Basic Principles
The Model CEJS High Voltage Steam Boiler
generates heat by passing electrical current
through the boiler water and uses the water
as the resistor. In the cutaway view of the
boiler, water is drawn from the bottom part
of the boiler drum by the circulating pump
(1) and forced up the center collection pipe
(2) to the nozzle stock (3) where it is
discharged through multiple nozzles with
sufficient velocity to strike the electrode
plate (4).
Electrical current now flows through R1,
the streams of water, to the nozzle stock.
The rate of flow is greatly in excess of the
steaming rate, and water which is not
vaporized from the nozzle streams falls to
the bottom or collector portion of the
750-272
11
9
R1
3
4 8
5
R2
6
14
Figure 1 - Model CEJS Cutaway View
Electrode Boiler
Model CEJS
cross sectional diagram
12
LEGEND
13 1. Circulation pump
2. Collection pipe
3. Nozzle stock
4. Electrode plate
5. Nozzle plate
6. Counter electrode
2
7. Control sleeve
8. Control linkage
7
9. Control cylinder rod
10. Control cylinder
11. Insulator
12. Steam outlet
13. Boiler shell
14. Stand-by heater
R1. Current path
R2. Current path
1
1