Composite phase change heat storage material using waste incineration power generation soot as matrix, and preparation method thereof
A technology of waste incineration and composite phase change, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of unreasonable utilization of resources and high cost of composite phase change heat storage materials, and achieve lower preparation costs and good thermal conductivity. , good thermal stability
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[0024] The preparation method of the composite phase change heat storage material using waste incineration power generation soot as a matrix comprises the following steps:
[0025] Step 1: Weigh the inorganic salt and the waste incineration power generation soot in the proportion by mass, mix them and grind them evenly, sieve them, and then add graphite and mix them evenly;
[0026] Step 2: Press the mixture obtained in step 1 into a tablet, and then demold it;
[0027] Step 3: Put the tablet obtained in Step 2 into a heating furnace, pass nitrogen into it, perform high temperature sintering, cool it and take it out to obtain a composite phase change heat storage material.
[0028] When sieving in the step 1, the mesh number of the sieve is 100-200 meshes.
[0029] In the second step, when using a die for tablet pressing, a steel die is used, the pressure is 6-15 Mpa, and the pressure holding time is 20-30 s.
[0030] In the third step, the sintering temperature during the h...
Embodiment 1
[0033] In this embodiment, the preparation process of the composite phase change heat storage material using waste incineration power generation soot as the matrix is as follows:
[0034] 1. Weigh KNO 3 It is mixed with waste incineration power generation soot (the mass ratio of the two is 4:1), the mixture is ground evenly and then sieved (the mesh number of the sieve is 200 mesh), and then graphite is added and mixed. The mass parts of the mixture and graphite The ratio is 10:1;
[0035] 2. Compression molding: the mixture mixed with graphite is pressed with a steel mold, the pressure is 10Mpa, the pressure holding time is 20s, and then the mold is demolded;
[0036] 3. Put the tablet into the heating furnace, and then carry out high-temperature sintering treatment after nitrogen is introduced. The sintering temperature was 350 °C, and the holding time was 30 min. After cooling, it is taken out to obtain a composite phase change heat storage material.
[0037] The phas...
Embodiment 2
[0041] In this embodiment, the preparation process of the composite phase change heat storage material using waste incineration power generation soot as the matrix is as follows:
[0042] 1. Weigh Mg(NO 3 ) 2 The mixture with waste incineration power generation soot (the mass ratio of the two is 8:3), grinded evenly and then sieved (the mesh number of the screen is 120 mesh), and then mixed with graphite and mixed, the mass ratio of the mixture to the graphite is 15:1;
[0043] 2. Compression molding: Press the mixture mixed with graphite into a sheet with a steel mold, the pressure is 6Mpa, the pressure holding time is 30s, and then the mold is demolded;
[0044] 3. Put the tablet into the heating furnace, and then carry out high-temperature sintering treatment after nitrogen is introduced. The sintering temperature was 400 °C, and the holding time was 30 min. After cooling, it is taken out to obtain a composite phase change heat storage material.
[0045] The phase-ch...
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