Automatic temperature controlling apparatus of low pressure coal economizer

The utility model discloses an automatic temperature controlling apparatus of a low pressure coal economizer, which is used for the energy-saving control of the low pressure coal economizer and comprises a low temperature water supply regulation valve for controlling the water supplying amount of a low temperature water supply pipe; a high temperature water supply regulation valve for controlling the water supplying amount of a high temperature water supply pipe; a first temperature detecting apparatus for detecting the working substance temperature of a main water supply pipe to obtain a first temperature; a controller with an input terminal connected with the first temperature detecting apparatus, wherein, the control terminal is connected with the low temperature water supply regulation valve and the high temperature water supply regulation valve to control the jaw opening of the low temperature water supply regulation valve and the high temperature water supply regulation valve according to the first temp