CN-224199245-U - Desulfurization wastewater zero release processing system

CN224199245UCN 224199245 UCN224199245 UCN 224199245UCN-224199245-U

Abstract

The application belongs to the field of chemical industry, and discloses a desulfurization wastewater zero-emission treatment system which comprises a wastewater inlet pipe, a multistage overflow tank and a clarification tank which are sequentially connected, wherein an overflow port of the clarification tank is connected with a water tank, the water tank is used for providing water for an evaporation crystallizer, the evaporation crystallizer is used for concentrating and crystallizing inorganic salt in the water, a solid discharge port of the evaporation crystallizer is connected with a dehydration dryer, a steam discharge port of the crystallizer is connected with a condenser, an intermediate water tank is arranged between the water tank and the evaporation crystallizer, water in the intermediate water tank is used as a cold source of the condenser, and the water tank is connected to the wastewater inlet pipe through a return pipeline and a pump. The system adopts the water tank and the middle water tank, if the water in the water tank does not reach the standard, the water flows back to the wastewater inlet pipe, the middle water tank can be used as a buffer memory, the situation that the evaporation crystallizer is free of water and available when the water in the water tank is unqualified is avoided, and in addition, the energy consumption of the evaporation crystallizer can be reduced by utilizing the waste heat of the water of the condenser.

Inventors

NIE XIN
Lai Liancai
ZENG YUXUAN
ZHU JIHONG
SHI XIAOLI
LI WEIJUN
XIE CHAOJIAN

Assignees

广州市天赐三和环保工程有限公司

Dates

Publication Date: 20260505
Application Date: 20250414

Claims (8)

1. A desulfurization wastewater zero-emission treatment system comprises a wastewater inlet pipe, a multistage overflow tank and a clarification tank which are sequentially connected, wherein an overflow port of the clarification tank is connected with a water tank, the water tank is used for providing water for an evaporation crystallizer, the evaporation crystallizer is used for concentrating and crystallizing inorganic salt in the water, a solid discharge port of the evaporation crystallizer is connected with a dehydration dryer, a steam discharge port of the crystallizer is connected with a condenser, and the desulfurization wastewater zero-emission treatment system is characterized in that an intermediate water tank is arranged between the water tank and the evaporation crystallizer, water in the intermediate water tank is used as a cold source of the condenser, and the water tank is connected to the wastewater inlet pipe through a return pipeline and a pump.
2. The desulfurization wastewater zero release treatment system according to claim 1, wherein the number of the condensers is 2, the 2 condensers are connected in parallel, the 2 condensers are switched by a switching valve, the cold source of one condenser is condensation water in a factory, and the cold source of the other condenser is water in an intermediate water tank.
3. The desulfurization wastewater zero release treatment system according to claim 1, wherein an electromagnetic valve is provided between the water tank and the wastewater inlet pipe.
4. The desulfurization wastewater zero release treatment system according to claim 1, wherein a drain is provided at the bottom of the clarifier, and the drain is connected to an external sludge treatment system.
5. The desulfurization wastewater zero release treatment system according to claim 4, wherein the lower portion of the clarifier is a tapered portion for settling flocculate in water to the bottom of the tapered portion.
6. The desulfurization wastewater zero-emission treatment system according to claim 1, wherein the multistage overflow tank comprises a pH adjusting tank, a sedimentation tank and a flocculation tank which are sequentially connected, wherein liquid in the pH adjusting tank, the sedimentation tank and the flocculation tank sequentially overflows into the next stage, the wastewater inlet pipe is connected with the pH adjusting tank, and the flocculation tank is connected with the clarification tank.
7. The desulfurization wastewater zero release treatment system according to claim 6, wherein the pH adjusting tank, the sedimentation tank and the flocculation tank are provided with stirrers.
8. The desulfurization wastewater zero release treatment system according to claim 6, wherein bottoms of the pH adjusting tank, the sedimentation tank and the flocculation tank are all connected to an external sludge treatment system.

Description

Desulfurization wastewater zero release processing system Technical Field The utility model relates to the field of chemical industry, in particular to a desulfurization wastewater zero-emission treatment system. Background The desulfurization wastewater zero release technology is already mature and applied in the thermal power field, and specific reference is made to: The patent publication No. CN205473132U, the subject is a desulfurization wastewater zero-emission treatment device, which discloses a pre-sedimentation unit, an adjusting unit, a primary flocculation precipitation unit, a softening unit, a secondary flocculation precipitation unit, an intermediate water tank unit, an evaporation crystallization unit, a two-stage sludge treatment unit and a water producing tank. In the system, the water quality of the intermediate pool is improved through multistage flocculation. However, the design of multi-stage flocculation systems increases the floor space significantly, and in mature field engineering, the space reserved for zero-emission systems is not too large, so an acceptable compromise is needed to solve this problem. Disclosure of utility model The utility model aims to provide a desulfurization wastewater zero-emission treatment system, which adopts a water tank and an intermediate water tank, water in the water tank flows back to a wastewater inlet pipe if the water does not reach the standard, the intermediate water tank can be used as a buffer memory, the situation that an evaporation crystallizer is not available when the water in the water tank is unqualified is avoided, and in addition, the energy consumption of the evaporation crystallizer can be reduced by utilizing the waste heat of the water of a condenser. The application discloses a desulfurization wastewater zero-emission treatment system which comprises a wastewater inlet pipe, a multistage overflow tank and a clarification tank which are sequentially connected, wherein an overflow port of the clarification tank is connected with a water tank, the water tank is used for providing water for an evaporation crystallizer, the evaporation crystallizer is used for concentrating and crystallizing inorganic salt in the water, a solid discharge port of the evaporation crystallizer is connected with a dehydration dryer, a steam discharge port of the crystallizer is connected with a condenser, an intermediate water tank is arranged between the water tank and the evaporation crystallizer, water in the intermediate water tank is used as a cold source of the condenser, and the water tank is connected to the wastewater inlet pipe through a return pipeline and a pump. In the desulfurization wastewater zero-emission treatment system, 2 condensers are connected in parallel, the 2 condensers are switched through a switching valve, the cold source of one condenser is condensation water in a factory, and the cold source of the other condenser is water in an intermediate water tank. In the desulfurization wastewater zero release treatment system, an electromagnetic valve is arranged between the water tank and the wastewater inlet pipe. In the desulfurization wastewater zero-emission treatment system, a discharge port is arranged at the bottom of the clarification tank and is connected to a peripheral sludge treatment system. In the desulfurization wastewater zero-emission treatment system, the lower part of the clarification tank is a conical part, and the flocculation in water is deposited at the bottom of the conical part. In the desulfurization wastewater zero-emission treatment system, the multistage overflow tank comprises a pH adjusting tank, a sedimentation tank and a flocculation tank which are sequentially connected, wherein liquid in the pH adjusting tank, the sedimentation tank and the flocculation tank overflows into the next stage in sequence, a wastewater inlet pipe is connected with the pH adjusting tank, and the flocculation tank is connected with the clarification tank. In the desulfurization wastewater zero-emission treatment system, the pH adjusting tank, the sedimentation tank and the flocculation tank are all provided with stirrers. In the desulfurization wastewater zero-emission treatment system, the bottoms of the pH adjusting tank, the sedimentation tank and the flocculation tank are all connected to an external sludge treatment system. The beneficial effects of the application are as follows: This scheme has adopted water tank and intermediate water tank, and water in the water tank is if not up to standard just flows back to waste water inlet tube, and intermediate water tank can regard as the buffer memory, avoids evaporating the crystallizer anhydrous usable when the water in the water tank is unqualified, in addition, through carrying out waste heat utilization to the water of condenser, can reduce evaporating the energy consumption of crystallizer. Drawings Fig. 1 is a schematic structural diagram of embodiment 1. Detailed D