Sludge dewatering device, and flue gas desulfurization system and process
A technology for sludge dewatering and desulfurization, which is applied in water/sludge/sewage treatment, sludge treatment, dewatering/drying/concentrated sludge treatment, etc. The problems of low utilization and resource utilization rate, etc., can achieve the effect of saving sludge disposal costs, reducing the amount of chemical sludge, and improving the reaction activity.
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Embodiment 1
[0072] This embodiment provides a flue gas desulfurization system 10 using water to treat by-product chemical sludge.
[0073] see figure 1 As shown, a flue gas desulfurization system 10 using water treatment by-product chemical sludge includes a chemical softening device 100, a separation and dehydration device 200, a sludge dehydration device 300, a sludge drying device 400, a grinding device 500, and a sulfur dioxide absorption device. Device 600, aeration oxidation device 700.
[0074] The chemical softening device 100, the sludge dehydration device 300, the sludge drying device 400, the grinding device 500, the sulfur dioxide absorption device 600, the aeration oxidation device 700 and the separation and dehydration device 200 are sequentially connected.
[0075] The chemical softening device 100 includes a silicon removal high density pool.
[0076] The sludge dehydrator 300 includes a centrifugal dehydrator.
[0077] The heat source of the sludge drying device 400 is...
Embodiment 2
[0084] This embodiment provides a flue gas desulfurization process using chemical sludge by-product of water treatment.
[0085] The wastewater comes from a zero-discharge project, and the relevant parameters of the wastewater are as follows: Flow Q=9000m 3 / d, COD=85mg / L, TDS=2790mg / L, HCO 3- =183mg / L, Cl - =1150mg / L, SO 4 2- =300mg / L, pH=7~8. The specific treatment process is as follows.
[0086] (1) The project wastewater enters the chemical softening device 100, and lime and sodium carbonate are added in the chemical softening device 100, and the Ca in the wastewater 2+ , Mg 2+ 、HCO 3- , CO 3 2- React with pharmaceuticals to produce CaCO 3 and Mg(OH) 2 Precipitation, by adding coagulants and flocculants to the wastewater, the resulting sediments are agglomerated to form chemical sludge.
[0087] The dosage of each drug is shown in Table 1.
[0088] Table 1
[0089] Drug name lime Sodium carbonate polyferric sulfate PAM Dosage (mg / L) 27...
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