CN111519678A

CN111519678A - River sludge discharging construction method

Info

Publication number: CN111519678A
Application number: CN202010289705.5A
Authority: CN
Inventors: 王学军; 王万众; 杨孝功; 王金涛; 王荣泽; 格菁; 格艳
Original assignee: BINZHOU JINYI EQUIPMENT CO LTD
Current assignee: BINZHOU JINYI EQUIPMENT CO LTD
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-08-11

Abstract

The invention discloses a sludge discharge construction method for river channels, which comprises the steps of cleaning floating objects and algae in a river channel, measuring and calculating the width of the river channel required to be desilted, manufacturing a river channel baffle wall transversely arranged in the river channel for intercepting, ensuring the depth of river water upstream of the river channel baffle wall, arranging a sludge-water stirring device in the river channel upstream of the baffle wall to well and uniformly mix sludge and river water together, pumping and conveying the mixed sludge-water mixture to a sludge-water separation device through a sludge pump for sludge-water separation, conveying the separated sludge to a dump truck, re-discharging the separated clear water into the river channel, gradually moving the river channel baffle wall downwards, and matching the sludge pump and the sludge-water stirring device to circularly discharge and separate and clean in the moving process. The invention realizes sludge mixing after the accumulation of water flow at a certain depth through the single-blocking water-blocking wall, has less granular objects, uniform sludge and water mixing, easy discharge and separation, small engineering quantity and convenient construction.

Description

River sludge discharging construction method

Technical Field

The invention relates to the technical field of river channel cleaning, in particular to a river channel sludge discharging construction method.

Background

With the acceleration of urbanization rhythm, the problem of environmental pollution is always the subject of the current hot, especially the treatment of river channels, such as sludge treatment, because of wide range, difficult centralized regulation and long time, the existing measures are usually to manually cooperate with equipment to carry out dredging operation, the commonly used equipment is provided with a sludge pump and the like, the dredging operation is carried out along the river direction of the river channel by means of ships or other equipment carriers, time and labor are wasted, and a large amount of organic and inorganic pollutants are deposited in the dredging comprehensive river channel sludge, which leads to the rapid reduction of dissolved oxygen in the water body, and the toxic action of partial pollutants and garbage is added to lead animals and plants in the river channel water body to die greatly and cause serious damage to the ecological system of the river channel water body, at present, the universal dredging method for dredging in the domestic river channel mainly adopts manual scouring and cofferdam for two ends of the river channel, the river water in the dam is drained, then the silt layer is washed by the high-pressure water pump, the washed silt is firstly concentrated in one section of the river channel and is finally transported and treated by the slurry truck, the water blocking force is high when the dam is built, a large amount of silt is needed to be stabilized, the large-scale blocking construction amount is large, the significance for dredging is small, the removal is troublesome, and partial river water is shallow, and the cleaning difficulty is large.

Disclosure of Invention

The invention aims to provide a river sludge discharge construction method.

The invention realizes the purpose through the following technical scheme:

a river sludge discharge construction method comprises the following steps:

step one, cleaning floating objects and algae in a river channel;

measuring and calculating the width of a required dredging river channel, manufacturing a river channel baffle wall transversely arranged in the river channel for intercepting, and ensuring the river depth upstream of the river channel baffle wall;

thirdly, a mud-water stirring device is arranged in the riverway upstream of the baffle wall to well and uniformly mix the sludge and river water together;

pumping and sending the mixed mud-water mixture to a mud-water separation device through a sludge pump for mud-water separation;

fifthly, conveying the separated sludge to a dump truck, and discharging the separated clear water into the river channel again;

step six, gradually moving the river course baffle wall downwards, and performing circulating discharge and separation cleaning by matching with the sludge pump and the muddy water stirring device in the moving process;

step seven, uniformly storing the separated sludge, and quantitatively deodorizing and drying the stored sludge;

and step eight, carrying out unified sterilization treatment on the cleaned river channel to recover the self-purification capacity of the water body.

Furthermore, in the first step, floaters and algae in the river channel are cleaned through a screen.

Furthermore, a plurality of overflowing holes are formed in the top of the wall body of the river channel baffle wall, so that the upstream river can drain after a certain height, and the filtering layers are installed on the overflowing holes to prevent sludge from draining into the downstream.

Further, in step four mud-water separation equipment is including dividing sieve conveyor part and centrifugal dehydration part, divide sieve conveyor part to carry out preliminary branch sieve through the silt to in the riverbed, accomplish the separation of solid particle and muddy water, realize elementary screening, centrifugal dehydration part is through centrifugal force with mud and water separation to carry, save and burn the mud after will separating. .

According to the river sludge discharging construction method, the sludge is mixed after the water flow is accumulated at a certain depth through the single-blocking water-blocking wall, the number of granular objects is small, the sludge and the water are uniformly mixed and are easy to discharge and separate, the engineering quantity is small, and the construction is convenient.

Detailed Description

The invention is further illustrated by the following examples:

a river sludge discharge construction method comprises the following steps:

step one, measuring the chloroacetic acid content of the chloroacetic acid rectification residues, then discharging the chloroacetic acid rectification residues to a heavy component treatment tank, recording the weight of the heavy component treatment tank as m1, and recording the chloroacetic acid content as n 1;

step two, starting a heavy component treatment tank to stir the internal chloroacetic acid rectification residues, slowly opening a vacuum valve and slowly heating the tank, controlling the internal pressure of the heavy component treatment tank to be-30 to-95 kpa, and controlling the temperature to be 120-160 ℃;

step three, cooling chloroacetic acid steam obtained after the temperature in the heavy component treatment tank is raised, and recycling the chloroacetic acid steam to a chloroacetic acid receiving tank;

step four, continuously distilling and observing the weight of the heavy component treatment tank until the distillation is finished after the weight is maintained, closing the vacuum valve and recording the weight as m2, and recording the content of chloroacetic acid in the sampling analysis tank as n2 so as to calculate the recovery rate of chloroacetic acid;

adding nitrogen into the heavy component treatment tank to control the pressure in the heavy component treatment tank to be 10 to 100 kpa;

continuously adding alkaline substances into the heavy component treatment tank under the stirring state for alkaline hydrolysis, controlling the temperature to be between 80 and 130 ℃, cooling the generated tail gas, discharging the cooled tail gas to an absorption device, and stopping adding caustic soda until the pH value in the tank is between 6 and 9;

seventhly, cooling and discharging the material subjected to alkaline hydrolysis for biochemical treatment, and stopping stirring of the heavy component treatment tank;

and step eight, drying the heavy component treatment tank after the alkaline hydrolysis materials are discharged completely, and loading a new batch of chloroacetic acid rectification residues for the above process.

In this embodiment, in the sixth step, the alkaline substance is one or a combination of caustic soda, flake caustic soda, soda ash, calcium carbonate and calcium hydroxide, and the concentration of the alkaline substance is between 10% and 35%.

In this example, the weight of chloroacetic acid distilled off in step four was calculated by the following formula: m is m1-m 2.

In this example, the chloroacetic acid recovery in step four was calculated by the following formula:

in the above example, 540 kg of m1 was recorded, 57.5% of the initial chloroacetic acid content n1 was recorded, 320 kg of m2 was recorded at constant mass after distillation, 26.97% of chloroacetic acid content and 72.71% of chloroacetic acid recovery in the heavies.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The river sludge discharge construction method is characterized by comprising the following steps:

step one, cleaning floating objects and algae in a river channel;

2. The river sludge discharging construction method according to claim 1, characterized in that: in the first step, floaters and algae in the river channel are cleaned through a screen.

3. The river sludge discharging construction method according to claim 1, characterized in that: a plurality of overflowing holes are formed in the top of the wall body of the river channel baffle wall, so that the upstream river can drain after a certain height, and the filtering layers are installed on the overflowing holes and prevent sludge from being discharged into the downstream.

4. The river sludge discharging construction method according to claim 1, characterized in that: the mud-water separation device in step four is including dividing sieve conveyor part and centrifugal dehydration part, divide sieve conveyor part to carry out preliminary branch sieve through the silt to in the riverbed, accomplish the separation of solid particle and muddy water, realize elementary screening, centrifugal dehydration part is through centrifugal force with mud and water separation to mud after will separating is carried, is stored and is burnt.