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Method for removing caustic sludge in caustic sludge pool completely and making them into urban industrial backfill soil

A technology for backfilling soil and alkali slag, which can be used in filling, solid waste removal, etc., can solve the problems of waste of land resources and large land occupation, and achieve the effect of less intermediate links, saving land resources, and good social effects.

Inactive Publication Date: 2007-10-03
SHANGHAI HAIMA HALOBIOS TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The large-scale soda plants in my country are all located in the coastal areas, and the amount of land occupied by soda slag ponds, waste quicklime, and fly ash piles is several thousand mu. Due to the lack of suitable technical means to deal with waste residues, the ponds for more than ten years have not been cleaned up to now, making the land The amount of occupation is increasing, and most of the large alkali plants are connected with power plants and lime plants, surrounded by industrial towns, and the land resources are very precious. The large alkali plants in my country are all located in coastal areas, and large industrial areas are being developed. A large area of ​​the development zone is the former tidal flats and sun-dried salt ponds, with a large amount of soil filling. The current method is to use natural soil to backfill industrial areas and urban land, so that large areas of natural forest tree planting and arable land are dug away. , exposing patches of fresh stones, many farmlands have been dug into ponds, wasting land resources

Method used

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  • Method for removing caustic sludge in caustic sludge pool completely and making them into urban industrial backfill soil
  • Method for removing caustic sludge in caustic sludge pool completely and making them into urban industrial backfill soil
  • Method for removing caustic sludge in caustic sludge pool completely and making them into urban industrial backfill soil

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Embodiment 1

[0033] The method for cleaning the soda plant alkali slag pool and making it into urban industrial backfill soil comprises the following steps:

[0034] 1. Alkali slag treatment in the alkali slag pool:

[0035] a. will be filled with the alkali slag pond 1 that is no longer used, excavate four 10-20 square meters of ponds 3 at the four corners of the dam 2 with an excavator, as shown in Figure 1;

[0036] b. Drain the water in the pond 3 with a water pump;

[0037] c. Excavate deep trenches 4 on four sides of the alkali residue pond 1, and connect the ponds 3 that have been dug to remove the alkali residue, as shown in Figure 2;

[0038] d. Install a water pump at the depth of the deep ditch 4, drain the water, keep the ditch without accumulated water every day, let the alkali slag in the alkali slag pool dry naturally, and become solidified. If the alkali slag pool 1 is not used for a long time, the alkali slag will The alkali slag in the pool has been solidified, the four...

Embodiment 2

[0046] The alkali slag treatment of the alkali slag pool is the same as that of embodiment 1. In the process of making urban industrial backfill soil, the three operations are also the same as that of embodiment 1, and then can be backfilled with 10-30cm thick natural soil on the backfill soil upper layer.

Embodiment 3

[0048] The alkali slag treatment of alkali slag pond is the same as embodiment 1, in making urban industry backfill soil technology, will handle solidified type alkali slag 35%, fly ash 30%, natural soil 30% in two a operations, 5% of the waste quicklime is transported to the filling area, and the latter two processes are the same as in Example 1.

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Abstract

The process of cleaning caustic sludge pond and producing industrial refilled soil includes the following steps: digging ditch in caustic sludge pond to drain water and solidify caustic sludge, excavating caustic sludge and transporting caustic sludge to refilling area, constructing dam after eliminating all the caustic sludge, mixing caustic sludge, flyash and waste lime in certain proportion in a stirrer, refilling the mixture to near the required height, spreading one layer of 5-15 cm thick lime, leveling and drying naturally. The said process converts waste into useful material.

Description

Technical field: [0001] The invention relates to a method for making urban industrial backfill soil from alkali slag in a pool after cleaning all the alkali slag, in particular to a method for making engineering soil from alkali slag, waste quicklime and fly ash discharged from a large alkali factory, which can be used for Reconstruction of coastal beach saline-alkali land, sun-salt ponds and low-lying land to form general industrial land and urban land. Background technique: [0002] A large-scale alkali plant with an annual output of one million tons occupies several thousand acres of land for its alkali slag ponds, fly ash ponds, and waste quicklime ponds, of which: [0003] 1. Alkali slag: the main component is milk of lime produced by the ammonia-soda method, and the milk of lime contains brine which is difficult to separate out naturally; [0004] 2. Waste quicklime: the main component is calcium oxide. When producing soda ash brine, lime is compounded. Taking the lim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00E02D17/18
Inventor 邹兴邹顾洁
Owner SHANGHAI HAIMA HALOBIOS TECH DEV