Method for preparing coal water slurry
A technology of coal-water slurry and water vapor, which is applied in combustion methods, block/powder fuel preparation, combustion equipment, etc., can solve the problems of high investment and operating costs, complicated preparation process, and high equipment failure rate, and achieve low cost. , improve economy, improve the effect of economic benefits
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Embodiment 1
[0025] Select municipal sludge with a moisture content of 60% in this embodiment, and its calorific value is: 1850Kcal / kg; the coal powder used in this embodiment is Datong clean coal, and its moisture content is 13%, and its calorific value is: 5200Kcal / kg kg.
[0026] Mix 200kg of municipal sludge and 50kg of pulverized coal into a sealed reaction container, add 5kg of sodium hydroxide into the reaction container, and then turn the agitator while feeding saturated steam for heating, and adjust the temperature to 150°C , start timing when the temperature in the reactor reaches 150°C, close the saturated steam inlet valve after the timing time reaches 1 hour, let it cool naturally, and open the pressure relief valve when the temperature in the reactor drops below 60°C, so that the internal pressure After lowering to atmospheric pressure, open the reaction container, take out the material in the container, and then cool to ambient temperature to obtain coal water slurry. The v...
Embodiment 2～6
[0029] For the dry pulping method of hydrous biomass, the raw materials and specific parameters involved are shown in Table 1, and the specific processing steps and methods are the same as in Example 1.
[0030] Raw materials and specific parameters involved in table 1 embodiment 2~6
[0031]
[0032] The above water content is calculated by weight percentage.
[0033] In each of the above-mentioned embodiments, after the treatment, the prepared coal-water slurry was cooled to ambient temperature, and the viscosity of the slurry was measured by an NDJ-8S viscometer to meet the requirements of spraying, and the calorific value was the same as that of the raw material. The water content of the water slurry is basically the same as that of the raw material, but the existing form of water is converted into free water, indicating that the sludge is almost completely dehydrated.
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