Sludge low-temperature drying pretreatment reagent, preparation method and using method of reagent

[0045] The preparation method of the sludge low-temperature drying pretreatment agent comprises the following steps:

[0046] S1, the Fe 2 (SO4) 3 、Al 2 (SO4) 3 •18H 2 O, MnSO 4 、Na 4 P 2 o 7 •10H 2 Dissolve O in water in proportion, and stir with a magnetic stirrer for 1-2 hours;

[0047] S2. Stand the stirred solution for 24 to 48 hours, and wait for aging;

[0048] S3, drop a small amount of dilute sulfuric acid into the matured solution, and adjust the pH value of the solution to the range of 1-2;

[0049] S4, add H in the solution 2 o 2 , and slowly stir evenly to obtain the sludge low-temperature drying pretreatment agent.

[0050]It should be noted that in S3, a small amount of dilute sulfuric acid is dropped into the matured solution to adjust the pH value of the solution. The purpose of this operation is to prevent the generation of precipitation in the solution, so as to ensure that the subsequent drug preparation process can be smooth. conduct.

[0051]

[0059] The sludge low-temperature drying pretreatment agent has the following components and mass percentages, Fe 2 (SO4) 3 : 10%; Al 2 (SO4) 3 •18H 2 O: 15%; MnSO 4 : 3%; Na 4 P 2 o 7 •10H 2 O: 0.6%; H 2 o 2 : 35%; the balance is water.

[0060] Its preparation method is as follows:

[0061] S1, the Fe 2 (SO4) 3 、Al 2 (SO4) 3 •18H 2 O, MnSO 4 、Na 4 P 2 o 7 •10H 2 O was dissolved in water according to the above ratio, and stirred for 1 h using a magnetic stirrer;

[0062] S2, leave the stirred solution for 24 hours, waiting for aging;

[0063] S3, drop a small amount of dilute sulfuric acid into the matured solution, and adjust the pH value of the solution to the range of 1-2;

[0064] S4, add H in the solution 2 o 2 , and slowly stir evenly to obtain the sludge low-temperature drying pretreatment agent.

[0065] The sludge low-temperature drying pretreatment method using the above sludge low-temperature drying pretreatment agent is as follows:

[0066]

[0073] The sludge low-temperature drying pretreatment agent has the following components and mass percentages, Fe 2 (SO4) 3 : 15%; Al 2 (SO4) 3 •18H 2 O: 20%; MnSO 4 : 5%; Na 4 P 2 o 7 •10H 2 O: 1%; H 2 o 2 : 40%; the balance is water.

[0074] Its preparation method is as follows:

[0075] S1, the Fe 2 (SO4) 3 、Al 2 (SO4) 3 •18H 2 O, MnSO 4 、Na 4 P 2 o 7 •10H 2 O was dissolved in water according to the above ratio, and stirred for 2 h using a magnetic stirrer;

[0076] S2, leave the solution that has been stirred for 36 hours, waiting for aging;

[0077] S3, drop a small amount of dilute sulfuric acid into the matured solution, and adjust the pH value of the solution to the range of 1-2;

[0078] S4, add H in the solution 2 o 2 , and slowly stir evenly to obtain the sludge low-temperature drying pretreatment agent.

[0079] The sludge low-temperature drying pretreatment method using the above sludge low-temperature drying pretreatment agent is as follow