Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of ridge grain seeding method for sludge in dry process rotary kiln

A technology for ridged seeds and sludge, which is applied in chemical instruments and methods, separation methods, dewatering/drying/concentrating sludge treatment, etc., to solve the problems of desulfurization and denitrification, with low investment and environmental protection.

Active Publication Date: 2016-01-06
长沙紫宸科技开发有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Obviously, the existing technology is difficult to effectively, economically and simply solve the problem of universal and large-scale consumption and application of sludge in dry rotary kiln. application issues on

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The sludge is the original sludge of the sewage treatment plant, and the water content of the sludge is 98.9%, and the solid content of the dry basis is 1.1%. 2 o 5 0.37wt%, ZnO0.01wt%.

[0043] The ridged seed crystal agent is taken from the clinker powder of the dry-process rotary kiln factory. The initial setting time of the clinker powder is 87 minutes and the final setting time is 143 minutes. 0.55Kg per ton of sludge.

[0044] The accelerator is ZC-D1 powder activated modified accelerator developed by Changsha Zichen Technology Development Co., Ltd., and the dosage is 100% of the quality of the ridged seed crystal agent, that is, 0.55Kg per ton of sludge.

[0045] Pump the sludge into the ridge mixing tank, under continuous stirring, add clinker powder and ZC-D1 powder activation modification accelerator directly into the sludge according to the above ratio, and continuously stir at 110 rpm for 2.5 hours. Ridge grain seeding, the sludge mixture seeded with spin...

Embodiment 2

[0048] The sludge is the original sludge of the sewage treatment plant, and the water content of the sludge is 99.1%, and the solid content of the dry basis is 0.9%; the P in the dry solid 2 o 5 0.51wt%, ZnO0.02wt%.

[0049] The ridged seed crystal agent is taken from the cement powder of the dry-process rotary kiln plant. The initial setting time of the cement powder is 147 minutes and the final setting time is 212 minutes. Use 1.53Kg.

[0050] The accelerator is the ZC-D2 powder activated modified accelerator developed by Changsha Zichen Technology Development Co., Ltd., and the dosage is 60% of the quality of the ridged seed crystal agent, that is, 0.92Kg per ton of sludge.

[0051] Pump the sludge into the ridge mixing tank. Under continuous stirring, pre-mix cement powder and ZC-D2 type powder activation modification accelerator according to the above ratio, and then directly add the composite powder into the sludge, at 60 rpm / Minutes of continuous stirring for 4 hour...

Embodiment 3

[0054] The sludge is the original sludge of the sewage treatment plant, and the moisture content of the sludge is 98.2%, and the solid content of the dry basis is 1.8%; the P in the dry solid 2 o 5 0.19wt%, ZnO0.01wt%.

[0055] The ridged seed crystal agent is taken from the back ash and ultrafine slag powder of the dry rotary kiln plant, and the two are mixed in a ratio of 1:1 by mass. The amount of the ridged seed crystal agent is 50% of the dry solid phase of the sludge %, that is, 9Kg per ton of sludge.

[0056] The accelerant is the ZC-D6 liquid activation modified accelerator developed by Changsha Zichen Technology Development Co., Ltd., and the dosage is 10% of the mass of the ridged seed crystal agent, that is, 0.9Kg per ton of sludge.

[0057] Add water and mix the ridged seed crystal agent and accelerator to make a suspension with a water content of 70wt%.

[0058] Pump the sludge into the ridge mixing tank, under continuous stirring, add the pre-prepared suspension...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

A ridge seeding method for sludge in a dry-process rotary kiln, comprising the following steps: (1) adding a ridge seeding agent and an accelerator to the sludge under continuous stirring, and stirring continuously, adding the accelerator Under the action, the ridged seed crystal agent reacts with the solid phase matter in the sludge, and the solid phase matter in the sludge is ridged into particles containing a large amount of clinker seed crystal precursor minerals, and the ridged grain crystal seeded sewage is obtained. (2) Dehydrate and separate the sludge mixture seeded with ridge grains to obtain filter residue and filtrate; (3) Mix the obtained filter residue into the raw material vertical mill as raw material and seed crystals, and at the same time as the raw material in the vertical mill Flue gas desulfurization agent, or filter residue is air-dried and finely processed and directly added to the dry-process rotary kiln smoke chamber or decomposition furnace for denitrification, and the residue is fed into the kiln as clinker seeds; the filtrate is used as industrial circulating water or returned to the sewage treatment plant. Utilizing the invention, the sludge can be used as a resource for the production of the dry-process rotary kiln without affecting the production conditions and product quality of the dry-process rotary kiln, and the production cost is low.

Description

technical field [0001] The invention relates to a ridge crystal seeding method and a filter residue application method for sludge used in a dry-process rotary kiln. Background technique [0002] Sludge is an inevitable product of sewage treatment. With the evolution of urbanization, the rate of urban sewage treatment has increased year by year, and the amount of urban sludge has also increased rapidly. At present, my country's sewage discharge has exceeded 5×10 10 m 3 ∕d, according to every 10,000 m 3 It is estimated that 5 tons of wet mud with a moisture content of 80% in sewage, if all the sewage is treated, the daily sludge production will exceed 2.5 million tons, and the annual sludge production will exceed 900 million tons. However, due to economic and technical reasons, on the one hand, more than 3,000 sewage treatment plants have produced more than 30 million tons of raw sludge (with a water content of about 99%), and the raw sludge is dehydrated by conventional me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/42C02F11/14B01D53/50B01D53/56
Inventor 尹无忌
Owner 长沙紫宸科技开发有限公司