CN206767899U - A high calcium water treatment system - Google Patents

Abstract

The utility model discloses a solve high calcium water and get into easy scale deposit of effluent disposal system, block up technical drawback such as pipeline, provide a high calcium water treatment system, include: the calcium removal mixing tank, a stirrer arranged in the calcium removal mixing tank, a high-calcium wastewater tank and an anaerobic reactor which are respectively communicated with the calcium removal mixing tank, a flowmeter arranged on an anaerobic backflow water pipeline, a lift pump connected to the outlet of the calcium removal mixing tank, an inclined net filtering device connected to the lift pump, and a pulp tank arranged below the inclined net filtering device. The scaling probability of the subsequent wastewater treatment workshop section is reduced, and the cyclic utilization of resources is realized.

Description

A high calcium water treatment system

technical field

The utility model relates to a pulping and papermaking wastewater treatment system, in particular to a decalcification device for pulping and papermaking wastewater.

Background technique

In the process of pulping and papermaking, waste paper raw materials and papermaking processes such as coating and filling all contain or use a large amount of calcium carbonate. Therefore, the calcium content in papermaking wastewater is very high. Due to the action of microorganisms, organic matter in wastewater is easily transformed. It is a volatile fatty acid and other substances, which react with calcium carbonate, so that the calcium is converted from the precipitate into an ion state, and enters the pulp and paper wastewater. If the calcium ion in the paper wastewater is not reduced, the pipeline in the subsequent wastewater treatment system It is very easy to scale and affect the normal use of equipment.

Contents of the invention

The purpose of this utility model is to solve the technical disadvantages of high-calcium water entering the waste water treatment system, such as easy scaling and blockage of pipelines, and proposes a high-calcium water treatment system, including: a decalcification mixing tank, a mixer installed in the decalcification mixing tank , the high-calcium waste water tank and the anaerobic reactor respectively connected with the decalcification mixing tank, the flow meter installed on the anaerobic return water pipeline, the lift pump connected to the outlet of the decalcification mixing tank, and the inclined screen filter device connected to the lift pump , The pulp pool set under the inclined screen filter device.

Further, the anaerobic return water in the above-mentioned anaerobic reactor flows into the decalcification mixing tank by virtue of the elevation difference between the anaerobic reactor and the decalcification mixing tank.

Further, the clean water filtered by the inclined screen filter device enters the waste water collection tank through the outlet pipe.

Further, the sediment and pulp in the pulp tank are used for papermaking after being press-filtered, and the clean water enters the waste water collection tank through pipelines.

Further, a slag discharge valve is installed between the inclined screen filter device and the pulp tank.

The technical effect of the utility model is that: the anaerobic reflux water contains a large amount of carbonate and bicarbonate ions, when the high-calcium wastewater and the anaerobic reflux water are mixed in the decalcification mixing tank, a chemical reaction occurs to produce vanadium containing calcium carbonate. The floc, in which the mixer speeds up the mixing and chemical reaction between them, and then passes through the inclined screen filter device to separate the sediment in the papermaking wastewater from the clean water, and the sediment can be discharged to the slurry tank by regularly opening the slag discharge valve In the process, the sediment and pulp in the slurry tank can be used for papermaking after pressure filtration, so the calcium ions and calcium carbonate in the waste liquid discharged to the wastewater collection tank are significantly reduced, reducing the scaling probability of the subsequent wastewater treatment section, and at the same time It also realizes the recycling of resources.

The flow meter can monitor the amount of anaerobic reflux water added to ensure that its added amount matches the amount of calcium-containing wastewater added. If too little is added, calcium ions cannot be completely neutralized, and too much added will cause waste.

Description of drawings

Figure 1 is a schematic diagram of the structure of a high calcium water treatment system.

detailed description

Embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

Embodiment one

Fig. 1 is a structural schematic diagram of a high-calcium water treatment system. The high-calcium water treatment system includes: a decalcification mixing tank 1, a mixer 2 installed in the decalcification mixing tank 1, and a high-calcium decalcification mixing tank 1 communicated with the decalcification mixing tank 1 respectively. Wastewater tank 3 and anaerobic reactor 4, flow meter 5 installed on the anaerobic return water pipeline, lift pump 6 connected to the outlet of decalcification mixing tank 1, inclined screen filter device 7 connected with lift pump 6, arranged on the inclined The pulp tank 8 below the screen filter device 7 is installed on the slag discharge valve 9 between the inclined screen filter device 7 and the pulp tank 8 . The clear water filtered by the inclined screen filter device 7 enters the waste water collection tank 10 through the outlet pipe.

When the treatment system is working, a chemical reaction occurs when the high-calcium wastewater and anaerobic reflux water are mixed in the decalcification mixing tank 1 to produce vanadium flocs containing calcium carbonate, and the mixer 2 speeds up the mixing and chemical reaction between them. During this process, the flow meter 5 monitors the amount of anaerobic reflux water to match the amount of high-calcium wastewater to ensure that the calcium ions are completely neutralized, and the lift pump 6 pumps the papermaking wastewater after the chemical reaction to the inclined screen filter device 7, through the filtration of the inclined screen filter device 7, the sediment in the papermaking wastewater is separated from the clear water, and the sediment can be discharged into the pulp tank 8 by regularly opening the slag discharge valve 9, and the sediment in the pulp tank 8 The sediment and pulp can be used for papermaking after pressure filtration, so the calcium ions and calcium carbonate in the waste liquid discharged into the waste water collection tank 10 are significantly reduced, reducing the chance of fouling in the subsequent waste water treatment section, and realizing resource conservation at the same time Recycling.

Claims (5)

1. A high-calcium water treatment system, characterized in that the structure comprises: a decalcification mixing tank (1), an agitator (2) installed in the decalcification mixing tank (1), and a decalcification mixing tank (1) respectively A connected high-calcium wastewater pool (3) and anaerobic reactor (4), a flow meter (5) installed on the anaerobic return water pipeline, a lift pump (6) connected to the outlet of the decalcification mixing tank (1), and The inclined screen filter device (7) connected to the lift pump (6), and the slurry tank (8) arranged below the inclined screen filter device (7). 2. a kind of high-calcium water treatment system according to claim 1, is characterized in that, the anaerobic reflux water in described anaerobic reactor (4) relies on anaerobic reactor (4) and decalcification mixing tank ( 1) The difference in elevation between flows into the descaling mixing tank (1). 3. A high-calcium water treatment system according to claim 1, characterized in that the clear water filtered by the inclined screen filter (7) enters the waste water collection pool (10) through the outlet pipe. 4. a kind of high-calcium water treatment system according to claim 1, is characterized in that, the sediment in the pulp tank (8) and paper pulp are used for papermaking after pressure filtration, and clear water enters waste water collection tank through pipeline ( 10). 5. A high-calcium water treatment system according to claim 1, characterized in that, a slag discharge valve (9) is installed between the inclined screen filter device (7) and the slurry tank (8).