阅读说明：本技术 移动式生活垃圾焚烧飞灰应急固化稳定化设备 (Mobile household garbage incineration fly ash emergency curing and stabilizing equipment ) 是由 王建伟 向瀚 张立 王娟娟 陈春霞 于 2020-12-10 设计创作，主要内容包括：移动式生活垃圾焚烧飞灰应急固化稳定化设备是垃圾焚烧飞灰综合稳定化处理领域的一种新型技术开发与应用,属于危险废物处理处置技术领域。本设备的技术开发与应用可实现①已稳定固化但不合格需二次处置的块状飞灰②烟气系统吸收塔板结飞灰③吸收塔剥落的板结飞灰④厂内原有存量分散堆放飞灰⑤含重金属的废渣等的稳定化处置。同时可作为垃圾焚烧发电厂固定式飞灰稳定化处理系统的应急备用。本专利设备主要工艺流程为收集-筛分破碎-定量称重-计量加药-搅拌-卸料。系统随车辆移动灵活,可在一台设备上完成整套飞灰固化稳定化处理流程,同时实现各种性状飞灰及含重金属废渣的稳定化处置。(A mobile household garbage incineration fly ash emergency solidification and stabilization device is a novel technology development and application in the field of comprehensive stabilization treatment of garbage incineration fly ash, and belongs to the technical field of hazardous waste treatment and disposal. The technological development and application of the equipment can realize the stabilization treatment of the stably solidified and unqualified block fly ash needing secondary treatment, the hardened fly ash peeled off by the absorption tower plate of the flue gas system, the dispersed and stacked fly ash in the original stock, the waste residue containing heavy metals and the like. Meanwhile, the fly ash stabilizing system can be used for emergency standby of a fixed fly ash stabilizing treatment system of a waste incineration power plant. The main process flow of the equipment comprises collection, screening and crushing, quantitative weighing, metering and dosing, stirring and discharging. The system can flexibly move along with the vehicle, can complete a whole set of fly ash solidification and stabilization treatment process on one device, and simultaneously realizes the stabilization treatment of various properties of fly ash and waste residues containing heavy metals.)

1. The movable domestic garbage incineration fly ash emergency curing and stabilizing equipment comprises the following treatment process flows:

(1) screening and crushing: collecting powdery or blocky household garbage incineration fly ash from the ground into a bucket with a screening and crushing function by the bucket, and realizing full screening and crushing of the fly ash by adjusting the working time and the strength of the bucket;

(2) metering and weighing: the screened and crushed materials are discharged into a stirring tank through a feeding system, an electronic scale is arranged on a large arm of the feeding system, and weighing data are transmitted to a vehicle-mounted PLC system with a programming function in a cab and a weighing secondary instrument in real time;

(3) adding medicine: after feeding is finished, the conveying pump is automatically started, chelating agent diluent is added into the stirring tank, the tail end of a chelating agent diluent pipeline is provided with a plurality of rows of universal adjusting nozzles, direction fine adjustment can be carried out according to the feeding condition, the medicament wall-hanging phenomenon is avoided, the vehicle-mounted PLC system automatically calculates the addition amount of the chelating agent diluent according to the programming and the fly ash feeding amount, the chelating agent diluent flow meter is controlled by the vehicle-mounted PLC system, and the conveying pump is automatically stopped and dosing is stopped when the flow reaches a calculated value;

(4) stirring: stirring is carried out when dosing starts or after dosing stops, the stirring time is controlled by a vehicle-mounted PLC system, and a speed control valve is arranged in a cab, so that the stirring speed and the rotation direction of the stirring tank can be accurately controlled;

(5) unloading: after stirring, lowering the stirring tank to a low position, simultaneously stirring the stirring rod to a discharging position, pushing materials in the stirring tank to a discharging port of a discharging groove by a spiral stirring blade, and finishing discharging;

(6) walking: the walking system adopts a stepless speed change and hydraulic steering four-wheel drive mode, and the walking and turning are flexible and quick.

2. The mobile household garbage incineration fly ash emergency solidification and stabilization device according to claim 1, characterized in that: a rotary crushing roller is arranged in the bucket.

3. The mobile household garbage incineration fly ash emergency solidification and stabilization device according to claim 1, characterized in that: the feeding system consists of a shovel arm, a movable arm oil cylinder and a bucket.

4. The mobile household garbage incineration fly ash emergency solidification and stabilization device according to claim 1, characterized in that: the electronic scale adopts the hydraulic sensor to calculate data and display a weighing numerical value, and the weighing accuracy is +/-0.5%.

5. The mobile household garbage incineration fly ash emergency solidification and stabilization device according to claim 1, characterized in that: the blowpit is equipped with from opening the apron in order to alleviate the raise dust, and the blowpit is connected with agitator tank base, can be along with agitator tank level 270 rotatory, and convenient unloading under the extreme condition.

The technical field is as follows:

the technology relates to a comprehensive stabilization treatment technology for waste incineration fly ash, and belongs to the technical field of hazardous waste treatment and disposal.

Background art:

at present, the conventional fly ash stabilization treatment in China mainly adopts field installation and fixation system equipment: the fly ash enters the fly ash bin and is conveyed to the independent metering scale through the screw to be metered, the solid medicament is conveyed to the independent metering scale through the screw to be metered, the chelating agent is conveyed to the independent metering scale through the pump, the three substances are conveyed into the double-shaft stirrer to be stirred after being metered, and the solidified fly ash after being discharged meets the national relevant standards and is bagged.

The existing fixed fly ash treatment system is directly connected with an ash bin through spiral conveying, only fly ash in the ash bin can be treated, the whole treatment system is closed, and a treatable target object is limited by a storage position and the shape and character of ash. The device is large in mounting and dismounting engineering quantity and long in construction period, is fixed near the fly ash bin, and is mainly used for disposing the raw ash.

The following types of fly ash to be treated often exist in the construction and operation processes of fly ash stabilization treatment engineering of a waste incineration power plant: the fly ash material is characterized by comprising block fly ash which is stably solidified but unqualified and needs secondary treatment, flue ash on an absorption tower plate of a flue gas system, hardened fly ash peeled off by an absorption tower, dispersed stacked fly ash in an original stock, waste residue containing heavy metal and the like. The existing disposal equipment cannot treat the fly ash of the type, and based on the dangerous characteristics and the environmental protection requirement of the fly ash, a disposal system and supporting equipment which are convenient and fast in action, simple in operation and strong in professional are urgently needed to be developed.

The invention content is as follows:

aiming at the problem that the fly ash which cannot be treated by a fixed treatment system can be easily subjected to emergency treatment, and considering the emergency standby of the conventional fly ash stabilization treatment system of a power plant, the invention develops a mobile household garbage incineration fly ash emergency curing and stabilizing equipment system. The main structure and the technical process of the system are as follows:

(1) screening and crushing: collecting powdery or blocky household garbage incineration fly ash from the ground into a bucket with a screening and crushing function by the bucket, and realizing full screening and crushing of the fly ash by adjusting the working time and the strength of the bucket;

(2) metering and weighing: the screened and crushed materials are discharged into a stirring tank through a feeding system, an electronic scale is arranged on a large arm of the feeding system, and weighing data are transmitted to a vehicle-mounted PLC system with a programming function in a cab and a weighing secondary instrument in real time;

(3) adding medicine: the chelating agent diluent is pumped from the dosing tank to the delivery pump by the dosing pump, after the feeding is finished, the delivery pump is automatically started, the chelating agent diluent is added into the stirring tank, the tail end of a chelating agent diluent pipeline is provided with a plurality of rows of universal adjusting nozzles, the direction fine adjustment can be carried out according to the feeding condition, the medicament wall hanging phenomenon is avoided, the vehicle-mounted PLC system automatically calculates the addition amount of the chelating agent diluent according to the programming and the fly ash feeding amount, the chelating agent diluent flow meter is controlled by the vehicle-mounted PLC system, and the delivery pump is automatically stopped and stops dosing when the flow calculation value reaches the flow calculation value;

(4) stirring: stirring is carried out when dosing starts or after dosing stops, the stirring time is controlled by a vehicle-mounted PLC system, and a speed control valve is arranged in a cab, so that the stirring speed and the rotation direction of the stirring tank can be accurately controlled;

(5) unloading: after stirring, lowering the stirring tank to a low position, simultaneously stirring the stirring rod to a discharging position, pushing materials in the stirring tank to a discharging port of a discharging groove by a spiral stirring blade, and finishing discharging;

(6) walking: the walking system adopts a stepless speed change and hydraulic steering four-wheel drive mode, and the walking and turning are flexible and quick.

A rotary crushing roller is arranged in the bucket.

The feeding system consists of a shovel arm, a movable arm oil cylinder and a bucket.

The electronic scale at the large arm of the loading bucket adopts a hydraulic sensor to calculate data and display a weighing value, and the weighing accuracy is +/-0.5%.

The blowpit is equipped with from opening the apron in order to alleviate the raise dust, and the blowpit is connected with agitator tank base, can be along with agitator tank level 270 rotatory, and convenient unloading under the extreme condition.

Has the advantages that:

the mobile household garbage incineration fly ash emergency solidification and stabilization equipment has multiple functions of collection, screening and crushing, weighing, metering and dosing, stirring, discharging and the like, and can complete a whole set of fly ash solidification and stabilization treatment process on one equipment. The research and development of the device make up the blank of the fly ash which is difficult to dispose by a fixed fly ash disposal system. The mobile household garbage incineration fly ash emergency curing and stabilizing equipment has the characteristics of flexibility in moving along with a vehicle, capability of screening and crushing, convenience in operation, low operation cost and real-time chelation and stabilization. The method is particularly suitable for emergency treatment with limited site and limited construction period. The method can realize the stabilization treatment of the fly ash and the waste residue containing heavy metal with various properties, enlarge the service range of the fly ash stabilization, shorten the construction period of the fly ash stabilization system, improve the treatment efficiency of the fly ash, and realize the emergency standby of the fixed fly ash stabilization treatment system of the power plant.

The equipment adopts the screening and crushing bucket to carry out screening and crushing, and is additionally provided with the weighing module on the basis, so that the equipment has a weighing function and can carry out quantitative loading on fly ash; the metering dosing system can automatically add medicament proportion according to the feeding amount; the stirring direction, the rotating speed and the stirring time of the stirring tank can be adjusted, so that the fly ash is fully and uniformly mixed; the built-in PLC system can set the fly ash feeding amount and the adding proportion of the solid medicament and the chelating agent diluent according to the project characteristics and the field condition, timely adjust the feeding parameters and ensure that the stabilized fly ash is qualified in discharging. After one-time stirring treatment is finished, the single actual value can be reset, and the engineering yield is recorded to be accumulated.

The treated fly ash is subjected to leaching experiments according to a method specified in a hydrochloric acid buffer solution method for leaching toxicity of solid waste 2007 HJ-T300, and the heavy metal indexes can reach the pollution control standard of a domestic garbage landfill GB 16889-2008.

Description of the drawings:

FIG. 1: the main process flow chart of the movable domestic garbage incineration fly ash emergency curing and stabilizing equipment.

The specific implementation mode is as follows:

(1) the solidified and unqualified blocky fly ash is collected into a bucket from the ground by the bucket for screening and crushing, then the blocky fly ash is weighed by an electronic scale arranged at the position of the big arm of a loading bucket and then enters a stirring tank after being loaded, and the weight of the blocky fly ash is 487 kg. After the fly ash feeding is finished, the vehicle-mounted PLC automatically calculates the theoretical chelating agent diluent adding amount according to the feeding amount, the weight of the chelating agent diluent is about 163kg, and automatically starts the electronic chelating agent diluent pump to start adding the chelating agent diluent into the stirring tank.

The fly ash and the chelating agent are stirred in the stirring tank for 1.5 min. After the stirring is completed, the stirring tank is lowered to the low position, the stirring rod is simultaneously stirred to the discharging position, and materials in the stirring tank are pushed to the discharging hole by the spiral stirring blades. And hanging the ton bag to the lower part of the discharge port by a forklift, and enabling the stabilized fly ash to enter the ton bag from the discharge port through the guide chute to complete bagging.

Leaching experiments are carried out on the fly ash in the bag body according to a method specified in a solid waste leaching toxicity leaching method acetic acid buffer solution method of HJ-T300 and 2007, and the experimental data is as follows:

the heavy metal leaching index can meet the requirements of the pollution control standard of domestic waste landfill (GB 16889-2008).

(2) The raw ash is collected into the bucket from the ground by the bucket, then the raw ash is weighed by an electronic scale arranged at the position of the big arm of the loading bucket and then enters the stirring tank through loading, and the weight of the fly ash is 413 kg. The cement is collected into the bucket from the ground by the bucket, then the cement is weighed by an electronic scale arranged at the position of the big arm of the loading bucket and then enters the stirring tank through loading, and the weight of the fly ash is 83 kg. After the feeding of the fly ash and the cement is finished, the vehicle-mounted PLC automatically calculates the theoretical chelating agent diluent adding amount according to the feeding amount, the total amount is about 140kg, and automatically starts the electronic chelating agent diluent pump to start adding the chelating agent diluent into the stirring tank.

The fly ash and the chelating agent are stirred in the stirring tank for 1 min. After the stirring is completed, the stirring tank is lowered to the low position, the stirring rod is simultaneously stirred to the discharging position, and materials in the stirring tank are pushed to the discharging hole by the spiral stirring blades. And hanging the ton bag to the lower part of the discharge port by a forklift, and enabling the stabilized fly ash to enter the ton bag from the discharge port through the guide chute to complete bagging.

Leaching experiments are carried out on the fly ash in the bag body according to a method specified in a solid waste leaching toxicity leaching method acetic acid buffer solution method of HJ-T300 and 2007, and the experimental data is as follows:

the heavy metal leaching index can meet the requirements of the pollution control standard of domestic waste landfill (GB 16889-2008).