CN103395959A - Lake sludge dewatering process - Google Patents

Abstract

The invention relates to a lake sludge dewatering process which comprises the steps of: a, dredging sludge in appointed lake and river regions by using a dredger; b, conveying the sludge to a sludge unloading dock by using a sludge barge, unshipping the sludge into a dock sludge hopper by using a shipborne unshipping crane; c, conveying the sludge to a material distributor of a material pond by using a screw conveyor, distributing and tedding in the material pond; d, tedding the sludge by using a scraper; e, stripping the tedded sludge by using an automatic reclaimer, and conveying the tedded sludge to a concrete yard for being tedded for the second time; f, putting the sludge in storage for later use. The lake sludge dewatering process has the beneficial effects that bricks are made by using the lake sludge, waste materials are recycled, the environment benefit is remarkable, the simplicity in operation is achieved, particle diameter and water content of raw materials are controlled to be within a proper range, the industrialized production is met, the foundation is laid for later processes such as forming and firing, the sludge mixing amount is above 90 percent, the utilization rate of the sludge is high, and the made bricks are soundproof and remarkable in heat preservation effect.

Description

A kind of lake silt dewatering process

Technical field

The present invention relates to a kind of lake silt dewatering process.

Background technology

In China, along with the fast development of economy, town and country construction is in great demand to building materials.In recent years, some brick and tile enterprises under the ordering about of economic interests, had all treated as farmland or even bank of river their Tu Yuan, unauthorized and wasteful mining, remain incessant after repeated prohibition, and makes large-area landforms vegetation be destroyed, ecotope is affected, and soil erosion is very serious.For fear of with reduce fetch earth destructions of brick and tile enterprise to farmland, prevent from digging useless farmland, governments at all levels and relevant department carry forward vigorously the materials for wall reform, clay brick is used in restriction, the light-duty brick and tile of advocating and encouraging other alternative materials of use to make.The exploitation of mud, both can meet the demand of brick and tile enterprise to raw material, but efficiently and effectively saving and the resource of protecting farmland again have reality and profound significance to water conservancy and national economy sustainable development.

Mud is natural moisture content greater than liquid limit, natural void ratio more than or equal to 1.5 cohesive soil, be a kind of extremely complicated heterogeneous body that is formed by organic relic, bacterium thalline, inorganic particle, colloid etc., comprise the integrated solid material of the materials such as the solid particulate such as the silt of sneaking in sanitary sewage or industrial and mineral waste water, fiber, plant and animal residues and the floss that condenses, various colloid, organic matter and the metallic element that adsorbs thereof, microorganism, germ, worm's ovum.Contain a large amount of inanimate matters in mud, can be used as the raw material of the building materials such as brick and tile and cement.

Although the domestic enterprise that a large amount of production silt sintering bricks has been arranged,, compare with some countries such as America and Europes, also there am very large gap in we at aspects such as production unit, technique, theories, and wherein the mud volume is exactly one of problem of demanding urgently resolving.Due to the starting material clay-phase of mud and traditional vitrified brick than certain difference is arranged, most of enterprise can not produce and meet the product that architecture production is used with the mud of high volume, but want much other raw materials of admixture, just very limited for the utilization of mud like this.

Directly dig out the mud water content of coming too high from lake, can't meet the needs of production, need it is carried out processed.Dewatering process is the basis that raw material preformulation, material depth are processed, and makes the grain diameter of raw material and water content be controlled at suitable scope, meets industrialized production.

Summary of the invention

The technical problem to be solved in the present invention is:, based on the problems referred to above, the invention provides a kind of lake silt dewatering process.

The present invention solves the technical scheme that its technical problem adopts: a kind of lake silt dewatering process comprises the following steps:

A, dredger are specifying lake, zone, river course to excavate mud;

B, mud barge deliver to mud unloading harbour with mud, and the boat-carrying loop wheel machine of unloading a ship is unloaded to mud in harbour mud hopper;

C, worm conveyor are delivered to mud on the material distributing machine of material pond, and cloth teds in the material pond;

D, scraper ted mud, and airing sludge dewatering to water ratio is 30～35%(wet basis);

E, the automatic material fetching machine mud after with airing is peeled off, and is delivered to the concrete place and carries out secondary and ted, to water ratio＜15%(wet basis);

F, the mud sampling and testing after tedding, minute store up and to put, and puts in storage standby.

The invention has the beneficial effects as follows: utilize lake silt brickmaking, turn waste into wealth, obvious environment benefit; Simple to operate, the grain diameter of raw material and water content are controlled at suitable scope, meet industrialized production, for the moulding in later stage, the technique such as fire and lay the first stone; The mud volume is more than 90%, and the utilization ratio of mud is high, and the brick sound insulation, the heat insulation effect that make are remarkable.

Embodiment

The invention will be further described in conjunction with specific embodiments now, and following examples are intended to illustrate the present invention rather than limitation of the invention further.

A kind of lake silt dewatering process comprises the following steps:

A, dredger are specifying lake, zone, river course to excavate mud;

B, mud barge deliver to mud unloading harbour with mud, and the boat-carrying loop wheel machine of unloading a ship is unloaded to mud in harbour mud hopper;

C, worm conveyor are delivered to mud on the material distributing machine of material pond, and cloth teds in the material pond;

D, scraper ted mud, and airing sludge dewatering to water ratio is 30～35%(wet basis);

E, the automatic material fetching machine mud after with airing is peeled off, and is delivered to the concrete place and carries out secondary and ted, to water ratio＜15%(wet basis);

F, the mud sampling and testing after tedding, minute store up and to put, and puts in storage standby.

Construction can store enough raw-material storing canopies, even the weather such as sleet also can also guarantee the normal operation of crushing plant.Former material shed is designed to Lightweight Steel Construction, and is provided with the passage of printing opacity, guarantees enough illumination.Raw material will carry out the tests such as oxide content, plasticity index, divides to store up according to the difference of its various character and puts, so that production control and batching.

The mud starting material are comprised the character such as plasticity index, grating, oxide content, mineral composition do comprehensive analysis, and with then drying, roasting etc. of small-sized vacuum extruder moulding, the important character such as the intensity by measuring finished product, contraction, thermal conductivity are determined other the processing condition such as the most rational proportioning, sintering curve, forming pressure and vacuum tightness, to improve quality and the success ratio of product in actual production process.

Take above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, the relevant staff can in the scope that does not depart from this invention technological thought, carry out various change and modification fully.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to the claim scope.

Claims (1)

1. lake silt dewatering process comprises the following steps:

A, dredger are specifying lake, zone, river course to excavate mud;

B, mud barge deliver to mud unloading harbour with mud, and the boat-carrying loop wheel machine of unloading a ship is unloaded to mud in harbour mud hopper;

C, worm conveyor are delivered to mud on the material distributing machine of material pond, and cloth teds in the material pond;

D, scraper ted mud, and airing sludge dewatering to water ratio is 30～35%(wet basis);

E, the automatic material fetching machine mud after with airing is peeled off, and is delivered to the concrete place and carries out secondary and ted, to water ratio＜15%(wet basis);

F, the mud sampling and testing after tedding, minute store up and to put, and puts in storage standby.