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Water softening pretreatment system

A water softening and pretreatment technology, applied in descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of reduced burden of waste lye discharge, low resource utilization, and high treatment costs and other problems, to achieve the effect of low cost, reducing emission burden and improving resource utilization rate

Inactive Publication Date: 2019-08-16
淄博益海环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defect of high processing cost in the prior art, the present invention provides a water softening pretreatment system, which solves the problem that the existing water softening pretreatment system cannot make full use of flue gas carbon dioxide and waste caustic soda The defects of low resource utilization rate and high processing cost, and at the same time greatly reduce the discharge burden of waste lye for enterprises

Method used

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Embodiment 1

[0018] Embodiment one, by figure 1 with figure 2 Given, the present invention comprises 32% liquid caustic soda storage tank 1, metering pipe 2, pH adjustment metering pump 3, waste water main pipeline 4, NaCH lye metering pump 5, spray pipe 6, first stage spray tower 7, spray Spray pump 8, second spray tower 9, third spray tower 10, fourth spray tower 11, fifth spray tower 12, gas pipeline 13, desulfurization and denitrification flue gas input port 14, buffer tank 15, dehardening The metering pump 16 and the first valve 17, the outlet end of the 32% liquid caustic soda storage tank 1 is connected to the pH adjustment metering pump 3 through the metering pipe 2, and the outlet end of the pH adjustment metering pump 3 is connected to the waste water main pipeline 4, 32% The other side of the outlet end of the liquid alkali storage tank 1 is connected with a NaCH lye metering pump 5 through a metering pipe 2, and the NaCH lye metering pump 5 is connected with the top of the fi...

Embodiment 2

[0019] Embodiment two, on the basis of embodiment one, by figure 1 Given, between the spray pump 8 and the first stage spray tower 7, the second spray tower 9, the third spray tower 10, the fourth spray tower 11 and the fifth spray tower 12, all pass through the spray pipe 6, the spray pipe 6 is provided with a second valve 18, which facilitates the flow of liquid through the spray pipe 6, and facilitates the control of the flow rate of the liquid inside the spray pipe 6 through the second valve 18.

Embodiment 3

[0020] Embodiment three, on the basis of embodiment one, by figure 2 Given, the gas delivery pipe 13 is provided with a third valve 19, through which the gas flow rate of the gas delivery pipe 13 can be conveniently controlled.

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Abstract

The invention discloses a water softening pretreatment system. The system comprises a 32% liquid alkali storage tank, a metering tube, a pH regulating metering pump, a wastewater main pipeline, a NaCHalkali liquid metering pump, a spraying tube, a first-stage spray tower, a spray pump, a second spray tower, a third spray tower, a fourth spray tower, a fifth spray tower, a desulfurization and denitration flue gas input port, a buffer tank and a hardness removal metering pump. Desulfurization and denitration flue gas is combined with a waste NaOH alkali liquid to remove the hardness of water; carbon dioxide in the flue gas is fully used, the waste alkali liquid is fully used, wastes are changed into valuables, and the waste flue gas resource is used, so the resource utilization rate is increased, and the system is suitable for enterprises with waste alkali liquid emission and a large amount of desulfurization and denitration flue gas, overcomes the defect of high cost of treatment in the prior art, and makes the cost of hardness removal treatment extremely low; and the carbon dioxide is combined with the waste alkali NaOH to form a water hardness remover Na2CO3 with an extremely good effect, so the waste alkali liquid discharging burden of the enterprises is reduced, and the system is very consistent with the resource utilization maximizing industry trend.

Description

technical field [0001] The invention relates to the technical field of waste water zero-liquid discharge or reclaimed water reuse, in particular to a water softening pretreatment system. Background technique [0002] The hardness of water refers to the content of salts dissolved in water, that is, the content of calcium salts and magnesium salts. At present, the country's control of water pollution is becoming increasingly strict. Most enterprises and institutions have the actual demand for waste water recycling. If the waste water discharged by enterprises and institutions needs to be partially or completely reused (zero liquid discharge), and this part If the hardness is high, it will lead to serious fouling of water recovery system equipment, especially reverse osmosis membrane or nanofiltration membrane equipment, resulting in a rapid decline in water production, and this pollution is sometimes even irreversible. Therefore, almost all high-hardness wastewater reuse syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/00
CPCC02F5/00
Inventor 许波唐申亮
Owner 淄博益海环保科技有限公司