1. The sludge and sludge moisture draining agent is characterized in that:

the coating comprises the following components in parts by weight:

2. the sludge moisture drainer as claimed in claim 1, wherein:

the coating comprises the following components in parts by weight:

3. the sludge moisture drainer as claimed in claim 2, wherein:

the coating comprises the following components in parts by weight:

4. the sludge moisture drainer as claimed in claim 3, wherein:

the preparation method of the sludge and sludge moisture draining agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging.

5. The sludge moisture drainer as claimed in claim 4, wherein:

the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

6. The sludge moisture drainer as claimed in claim 4, wherein:

the average grain diameter after grinding treatment is 0.2 mm.

7. The sludge moisture drainer as claimed in claim 4, wherein:

the environment temperature of the grinding treatment is below 20 ℃.

8. The sludge moisture drainer as claimed in claim 4, wherein:

the environment temperature of the airing is 8 ℃.

9. The sludge moisture drainer as claimed in claim 4, wherein:

the airing environment is an indoor ventilation place.

Background

At present, methods for treating sludge mainly comprise methods such as landfill, marine abandonment, composting and incineration, wherein the sludge incineration gradually becomes a reliable and effective sludge treatment method due to the advantages of small occupied area, asepsis, recyclable incineration ash and the like. However, the incineration method is not suitable for sludge and sludge in all environments, and causes environmental pollution and the like.

For example, the chinese invention patent, application No.: CN201611015927.8, publication No.: CN106701088A discloses a composite curing agent for repairing heavy metal contaminated soil and an application method thereof, and the technical scheme is as follows:

the composite curing agent for repairing heavy metal contaminated soil consists of curing agent powder and curing agent liquid, wherein the curing agent liquid is water glass, and the curing agent powder consists of the following substances in parts by weight:

2-5 parts of cement, 1-2 parts of activated steel slag powder, 2-4 parts of quicklime and 1-2 parts of phosphate.

Further, the cement is at least one of portland cement and aluminate cement.

Further, the activated steel slag powder is steel slag according to the mass ratio: 7.0-11 percent of grinding aid: 1 mixing and ball milling for 10-30 min.

Furthermore, the grinding aid is at least one of sodium acetate, sodium carbonate and sodium silicate aqueous solution with the mass concentration of 10-30 g/L.

Further, the phosphate is at least one of sodium hydrogen phosphate, sodium dihydrogen phosphate and ammonium dihydrogen phosphate.

The preparation method of the curing agent powder provided by the invention comprises the following steps: and mixing the cement, the activated steel slag powder, the quicklime and the phosphate in parts by weight, and uniformly stirring to obtain the standby curing agent powder.

The invention also provides a method for applying the composite curing agent to repair heavy metal contaminated soil, which comprises the following steps:

1) carrying out excavation, crushing and screening treatment on the soil polluted by metal to be repaired to obtain fine-grained soil;

2) mixing the curing agent powder with the fine-grained soil obtained in the step 1) according to a mass ratio of 4-9: mixing at the ratio of 100-;

3) gradually adding the curing agent liquid into the uniformly mixed soil prepared in the step 2), and continuously stirring to fully mix the curing agent liquid and the uniformly mixed soil to obtain mixed soil;

4) and (3) sprinkling water to the mixed soil obtained in the step 3) until the water content reaches 25-40%, and standing for 5-8 days to repair the soil polluted by the heavy metal.

Further, screening in the step 1) until the grain size of the fine-grained soil is less than 15 mm.

Further, the curing agent liquid agent in the step 3) is prepared by the following steps in percentage by mass: and (3) fine soil is 3-5: 89 to 115 ".

However, the above patents have the following problems:

the solidified sludge can not be used for other purposes subsequently, so that the comprehensive utilization value is improved; meanwhile, the heavy metal in the sludge can not be effectively degraded.

Disclosure of Invention

1. Problems to be solved

Aiming at the problems in the prior art, the invention provides a sludge and sludge moisture drying agent which can effectively promote the restoration treatment of sludge and sludge polluted by organic matters or heavy metals.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The sludge and sludge moisture draining agent comprises the following components in parts by weight:

the sludge and sludge water draining agent comprises the following components in parts by weight:

the sludge and sludge water draining agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

3. Advantageous effects

Compared with the prior art, the invention has the beneficial effects that:

in the invention, substances such as cassava starch, polylactic acid, attapulgite and the like are introduced into the traditional draining agent, so that the degradation effect on organic matters and heavy metal ions in sludge can be improved, and the organic matters can be effectively carbonized under the synergistic action of the cassava starch, the polylactic acid, the attapulgite and the like with the alkaline agent; meanwhile, the treated sludge has better mechanical property, and can be directly transported to a treatment plant for solidification, gelatinization, road building, brick making, gallery backfilling and other treatments after being dried; experiments show that the draining agent can effectively promote the restoration treatment of sludge polluted by organic matters or heavy metals.

Detailed Description

The invention is further described with reference to specific examples.

Example 1

The sludge and sludge moisture draining agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Example 2

The sludge and sludge moisture draining agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Example 3

The sludge and sludge moisture draining agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Example 4

The sludge and sludge moisture draining agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Example 5

The sludge and sludge moisture drying agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Comparative example 1

The sludge and sludge moisture drying agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite in a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging to obtain the product.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Comparative example 2

The sludge and sludge moisture drying agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging to obtain the product.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Comparative example 3

The sludge and sludge moisture drying agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid, magnesium hydroxide and calcium hydroxide into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging to obtain the cassava starch.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Comparative example 4

The sludge and sludge moisture drying agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, polylactic acid, magnesium hydroxide, calcium hydroxide and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging to obtain the product.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Comparative example 5

The sludge and sludge moisture drying agent comprises the following components in parts by weight:

in the sludge and sludge moisture drying agent, the preparation method of the sludge and sludge moisture drying agent comprises the following steps:

respectively filling cassava starch, calcium oxide, potassium oxide, sodium oxide, polylactic acid and attapulgite into a drying tank, uniformly stirring, then putting into a grinder for grinding, airing after grinding, and bagging.

In the sludge and sludge moisture draining agent, the stirring speed is 20 r/min;

the stirring environment temperature is below 20 ℃.

In the sludge and sludge moisture draining agent, the average grain diameter after grinding treatment is 0.2 mm.

In the sludge and sludge moisture drying agent, the environment temperature of the grinding treatment is below 20 ℃.

In the sludge and sludge moisture draining agent, the airing environment temperature is 8 ℃.

In the sludge and sludge moisture draining agent, the airing environment is an indoor ventilation place.

Example 6

The draining agents prepared in examples 1 to 5 and comparative examples 1 to 5 were tested as follows:

test methods reference: application No. CN201811405202.9, publication No. CN109293326A, patent name-a curing agent for sludge treatment, a preparation method and application thereof, and entrusts Shanghai micro-spectrum chemical technology service company Limited to perform content test.

The tested sludge is selected from a certain area of a board reservoir of the city of Hefei province of Anhui province, the water content of the sludge is 52.5 percent, the COD content of the sludge is 1213.5mg/L, the BOD content of the sludge is 207.8mg/L, the total cadmium content of the sludge is 22.6mg/L, the total lead content of the sludge is 875mg/L, and the polycyclic aromatic hydrocarbon content of the sludge is 56.4 mg/L.

The sludge to be tested is treated in the following manner: 250 g of drying agent is added to each kilogram of sludge and sludge.

After 180d treatment, the test results are shown in table 1:

TABLE 1 test results

The above tests show that, compared with examples 1 to 5, the draining agent prepared in examples 1 to 5 can perform better draining, removing and degrading effects on moisture, heavy metals and organic matters in sludge, and the sludge treated for 180 days has higher mechanical strength, so that the draining agent is suitable for subsequent treatments such as brick making, road building, tunnel backfilling and the like. Specifically, in comparative example 1, tapioca starch is removed, various performance indexes slide down, the tapioca starch can be mixed with water in sludge to form paste, so that the water content is reduced, in comparative example 2, polylactic acid is removed, performance parameters slide down greatly compared with the tapioca starch, especially the COD content and the BOD content, the polylactic acid has better degradability, the polylactic acid can wrap organic matters in the sludge, in comparative example 3, attapulgite is removed, the parameters in table 1 show that the attapulgite can not only absorb water, but also promote the microbial degradation of the organic matters and heavy metal ions in the sludge, in comparative example 4 and comparative example 5, substances such as calcium oxide, potassium oxide, sodium oxide, magnesium hydroxide, calcium hydroxide and the like are removed, wherein basic oxides (calcium oxide, potassium oxide, sodium hydroxide, magnesium hydroxide, calcium hydroxide and the like), Potassium oxide and sodium oxide) to react violently when meeting water, generate more heat to promote the evaporation of water, and in addition, the generated heat can be utilized to carbonize organic matters in sludge and sludge, wherein substances such as magnesium hydroxide and calcium hydroxide can realize the adsorption effect, and the alkalization effect can be utilized to neutralize acidic substances and heavy metal ions in the sludge and sludge.

In conclusion, substances such as cassava starch, polylactic acid, attapulgite and the like are introduced into the traditional draining agent, so that the degradation effect on organic matters and heavy metal ions in sludge can be improved, and the organic matters can be effectively carbonized under the synergistic effect of the alkaline agent and the self; meanwhile, the treated sludge has better mechanical property, and can be directly transported to a treatment plant for solidification, gelatinization, road building, brick making, gallery backfilling and other treatments after being dried; experiments show that the draining agent can effectively promote the restoration treatment of sludge polluted by organic matters or heavy metals.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.