CN215755314U

CN215755314U - Coal blending management system of coal storage yard

Info

Publication number: CN215755314U
Application number: CN202120995432.6U
Authority: CN
Inventors: 曹进; 程志强
Original assignee: Chongqing Jianfeng New Material Co Ltd
Current assignee: Chongqing Jianfeng New Material Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-02-08
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a coal blending management system of a coal storage yard, which comprises a coal hopper and the coal storage yard, wherein the coal storage yard is provided with coal blending equipment, the coal blending equipment comprises at least two coal blending hoppers and at least two weighing type metering coal feeders, the lower end of a discharge port of each coal blending hopper is provided with the weighing type metering coal feeder, the weighing type metering coal feeder is connected with a feed end of a double-shaft stirring coal mixer through a first belt conveyor, a discharge end of the double-shaft stirring coal mixer extends to the coal hopper through a second belt conveyor, and the second belt conveyor is provided with a plurality of dumpers; the coal blending control system is respectively electrically controlled by a weighing type metering coal feeder, a double-shaft stirring coal mixer, a first belt conveyor and a second belt conveyor; one side of the coal storage yard is provided with a plurality of partitions to form a plurality of coal blending bins. The coal blending and stacking and packaging device is simple in structure, realizes the functions of coal blending and stacking and packaging in a coal storage yard, enlarges the coal storage capacity, and reduces the raw coal purchasing cost.

Description

Coal blending management system of coal storage yard

Technical Field

The utility model relates to the field of coal storage yards, in particular to a coal blending management system of a coal storage yard.

Background

The existing coal storage plant has the following problems because the site is limited and all coal entering the plant is mixed and stacked:

1. the problems that the consumption of a desulphurization device is increased, the instantaneous excessive emission of the flue gas SO2 is caused frequently, the sudden and heavy failure rate of slag transportation load is high, the flying ash is greatly increased, the blockage and the abrasion of a heating surface at the tail part of a boiler are increased and the safety, the stability and the economic operation of the device are seriously influenced in the coal combustion process due to the incapability of separate-stacking and combined combustion.

2. The method can not be used for carrying out the package firing, can not realize the package firing management of the coal stacking of different suppliers, and can not determine the specific coal source when the abnormity occurs in the use.

3. The coal yard adopts the place that does not have rain-proof facility, has great safe risk, still will cause more influences when meeting rainy day.

4. The low-price stockpiling requirement cannot be met, and the coal storage quantity of the coal stored in winter under the high-load condition of the boiler cannot meet the safe operation requirement.

Disclosure of Invention

The utility model aims to provide a coal yard management system which can reduce the combustion adjustment frequency of a boiler, improve the combustion efficiency of the boiler, increase the coal blending function and the stacking and packing combustion function of a coal storage yard, enlarge the coal storage capacity and reduce the raw coal purchase cost aiming at the defects of the prior art.

The technical scheme of the utility model is as follows:

a coal blending management system of a coal storage yard comprises a coal hopper and the coal storage yard, wherein a coal blending system is arranged on one side of the coal storage yard, a coal blending device is arranged on the coal storage yard and comprises at least two coal blending hoppers, at least two weighing type metering coal feeders, a double-shaft stirring coal mixer, a first belt conveyor, a second belt conveyor and a coal blending control system, the weighing type metering coal feeders are arranged at the lower ends of discharge holes of the coal blending hoppers, the weighing type metering coal feeders are connected with the feed ends of the double-shaft stirring coal mixer through the first belt conveyor, the discharge ends of the double-shaft stirring coal mixer extend to the coal hopper through the second belt conveyor, and a plurality of dischargers are arranged on the second belt conveyor; the coal blending control system is used for respectively electrically controlling the weighing type metering coal feeder, the double-shaft stirring coal mixer, the first belt conveyor and the second belt conveyor, controlling the starting and stopping actions of the weighing type metering coal feeder, the double-shaft stirring coal mixer, the first belt conveyor and the second belt conveyor, and realizing a coal blending function through a PLC (programmable logic controller) of the coal blending control system; and a plurality of partitions are arranged on one side of the coal storage yard to form a plurality of coal blending bins.

Furthermore, coal water collecting ditches are arranged on the periphery of the coal storage yard and are used for being connected with a sewage discharge ditch of the coal storage yard.

Further, the coal storage yard is also provided with a spraying device, and the spraying device is used for preventing dust from flying and preventing fire.

Further, a ceiling is arranged at the upper end of the coal storage yard.

Further, the coal blending hopper is arranged on one side of the coal storage yard, the upper end face of the coal blending hopper and the ground of the coal storage yard are positioned on the same horizontal plane, and the gradient of the first belt conveyor is lower than 16⁰。

Further, the first belt conveyor is a speed-regulating belt conveyor.

Furthermore, the first belt conveyor is connected with a distributor, one side of the distributor is connected with the double-shaft stirring coal mixer, and the other side of the distributor is used for directly discharging the coal into the coal storage yard.

Further, the discharger adopts a plough type single-side discharger.

Further, still include the power supply unit who is used for coal blending equipment power supply, power supply unit includes transformer, cable, cubical switchboard and the circuit breaker that is used for carrying out high voltage power supply.

Adopt above-mentioned technical scheme to have following beneficial effect:

the coal blending device is simple in structure, and the coal blending device and the coal blending bin are additionally arranged in the coal storage yard, and the coal which does not use the coal source coal quality is sent to the double-shaft stirring coal mixer through the coal blending hoppers by the coal blending device to be uniformly mixed, so that the mixing of different coal source coal qualities is realized, the boiler can be conveniently blended, the combustion efficiency is improved, and the blockage is prevented. The coal blending equipment realizes the automatic operation of the whole coal blending management system through the coal blending control system, and improves the working efficiency. The coal blending bin can be used for storing coal with certain coal quality and can also be used for storing mixed coal, so that the coal storage capacity is enlarged. Therefore, the utility model realizes the effects of coal collection, coal blending, conveying and coal storage.

The following description is further described in conjunction with the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a schematic block diagram of the present invention;

FIG. 2 is a plan layout view of the present invention;

FIG. 3 is a schematic view of the configuration of the coal blending hopper and the first belt conveyor of the present invention.

In the attached drawing, 1 is a coal storage yard, 2 is a coal blending bunker, 3 is a coal car, 4 is a coal blending hopper, 5 is a weighing type metering coal feeder, 6 is a first belt conveyor, 7 is a distributor, 8 is a double-shaft stirring coal mixer, 9 is a second belt conveyor, 10 is a discharger, and 11 is a ground coal hopper.

Detailed Description

Specific example 1:

referring to fig. 1 to 3, a coal blending management system of a coal storage yard includes a coal bunker 11, a coal storage yard 1, a coal blending device, and a power supply device for supplying power to the coal blending device, where the coal storage yard 1 is disposed beside the coal bunker 11, and one side of the coal storage yard 1 is provided with a plurality of partitions to form a plurality of coal blending silos 2, in this embodiment: two partitions are arranged in the coal storage yard 1 to form three coal blending bins, and the coal blending bins can be used for storing blended coal and can also be used for storing coal with different coal qualities or different manufacturers. The ground of the coal storage yard 1 is sequentially provided with a terrazzo layer, a gravel layer and a concrete layer from bottom to top, so that the hardness of the ground of the coal storage yard 1 is enhanced. Coal water collecting ditches are arranged around the coal storage yard 1 and are used for being connected with a sewage drainage ditch of the coal storage yard, rainwater or sewage of the coal storage yard 1 is discharged through the sewage drainage ditch connected with the coal storage yard, and the rainwater or the sewage enters a coal-containing wastewater pool for treatment and then is recycled. The coal storage yard 1 is also provided with a spraying device which is used for preventing dust raising and ignition in the coal storage yard 1. The spraying devices are distributed on two sides of the coal storage yard 1 and each spraying device is composed of a water pipe and a plurality of nozzles. Or the coal storage yard 1 is divided into a plurality of spans, and two rows of spraying devices are correspondingly arranged on each span of the coal storage yard 1. The roof of the coal storage yard 1 adopts a magnesium-manganese alloy plate as a roof material, but can be free of maintenance and operate for 20 years, so that the operation and maintenance cost is saved.

The coal blending device is arranged on the other side of the coal storage yard and comprises at least two coal blending hoppers, at least two weighing metering coal feeders, a double-shaft stirring coal mixer, a first belt conveyor, a second belt conveyor 9 and a coal blending control system, wherein the weighing metering coal feeders are arranged at the lower ends of discharge holes of the coal blending hoppers, the weighing metering coal feeders are connected with the feed ends of the double-shaft stirring coal mixers through the first belt conveyor, the discharge ends of the double-shaft stirring coal mixers extend to the coal hoppers through the second belt conveyor 9, a plurality of dumpers 10 are arranged on the second belt conveyor, and the dumpers 10 adopt plough type single-side dumpers. In this particular embodiment: the coal blending equipment comprises three coal blending hoppers 4, three weighing type metering coal feeders 5, a double-shaft stirring coal mixer and five single-side dumpers, wherein the lower end of each coal blending hopper 4 is correspondingly provided with one weighing type metering coal feeder 5. Furthermore, a feed inlet of the coal blending hopper 4 is provided with a grate for screening out large coal blocks. The coal blending control system adopts a PLC controller, is used for electrically controlling the weighing type metering coal feeder, the double-shaft stirring coal mixer, the first belt conveyor and the second belt conveyor respectively and is used for controlling the starting and stopping actions of the weighing type metering coal feeder, the double-shaft stirring coal mixer, the first belt conveyor and the second belt conveyor, and meanwhile realizes a coal blending function through the PLC controller of the coal blending control system. The power supply equipment is respectively and electrically connected with the coal blending control system, the weighing type metering coal feeder, the double-shaft stirring coal mixer, the first belt conveyor and the second belt conveyor, and comprises a transformer, a cable, a switch cabinet and a circuit breaker for high-voltage power supply.

The working principle of the utility model is as follows: the coal of the coal car 3 can be discharged to the coal blending bin 2 for temporary storage or directly discharged to the coal blending hopper 4. The lower coal amount of each coal blending hopper 4 is controlled by adjusting the coal feeding amount of a weighing type metering coal feeder 5 through a PLC controller, different coal types fall into a first belt conveyor through the coal blending hopper according to a certain proportion, the different coal types are conveyed to a double-shaft stirring coal mixer by the first belt conveyor to be stirred, the coal types are conveyed to a second belt to be conveyed after being uniformly stirred, when a discharger is put down by the PLC controller, the coal mixed on the second belt conveyor is discharged to a coal storage yard, and the coal blended in the coal storage yard is conveyed to a coal blending bin 2 through a coal pusher. When the PLC controller raises the discharger, the mixed coal on the second belt conveyor is directly sent to a ground coal hopper and is sent to a boiler for combustion through the ground coal hopper, the coal feeder and the conveying belt.

The utility model improves the combustion heat efficiency of the boiler, realizes the economical, safe and stable operation of the boiler, can save coal by more than 0.25 percent in expectation and realizes the benefit of 100 ten thousand yuan. Not only can optimize and stabilize the stability of a boiler device, ensure the production and operation of a company, but also can reduce the management difficulty of each link of related coal and adapt to the economic development requirement; due to the fact that the purchasing cost is reduced, the investment cost can be expected to be recovered within 5 years, and meanwhile, the method has good social benefits.

Possibly, the first belt conveyor 6 is connected with a distributor 7, one side of the distributor 7 is connected with the double-shaft stirring coal mixer 8, and the other side of the distributor is used for directly discharging coal into a coal storage yard, so that the coal can be directly discharged into the coal storage yard when the double-shaft stirring coal mixer 8 is overhauled or breaks down.

Claims

1. The utility model provides a coal blending management system of coal storage yard which characterized in that: the coal blending device comprises at least two coal blending hoppers, at least two weighing metering coal feeders, a double-shaft stirring coal mixer, a first belt conveyor, a second belt conveyor and a coal blending control system, wherein the weighing metering coal feeders are arranged at the lower ends of discharge holes of the coal blending hoppers, the weighing metering coal feeders are connected with the feed ends of the double-shaft stirring coal mixer through the first belt conveyor, the discharge ends of the double-shaft stirring coal mixer extend to the coal blending hoppers through the second belt conveyor, and a plurality of dumpers are arranged on the second belt conveyor; the coal blending control system respectively electrically controls the weighing type metering coal feeder, the double-shaft stirring coal mixer, the first belt conveyor and the second belt conveyor and is used for controlling the starting and stopping operations of the weighing type metering coal feeder, the double-shaft stirring coal mixer, the first belt conveyor and the second belt conveyor to realize coal blending; and a plurality of partitions are arranged on one side of the coal storage yard to form a plurality of coal blending bins.

2. The coal blending management system of the coal storage yard of claim 1, wherein: coal water collecting ditches are arranged around the coal storage yard and are used for being connected with a sewage discharge ditch of the coal storage yard.

3. The coal blending management system of the coal storage yard of claim 1, wherein: the coal storage yard is also provided with a spraying device which is used for preventing dust from flying and preventing fire.

4. The coal blending management system of the coal storage yard of claim 1, wherein: and a ceiling is arranged at the upper end of the coal storage yard.

5. The coal blending management system of the coal storage yard according to any one of claims 1 to 4, characterized in that: the coal blending hopper is arranged on one side of the coal storage yard, the upper end surface of the coal blending hopper and the ground of the coal storage yard are positioned on the same horizontal plane, and the gradient of the first belt conveyor is lower than 16⁰。

6. The coal blending management system of the coal storage yard of claim 1, wherein: the first belt conveyor is a speed-regulating belt conveyor.

7. The coal blending management system of the coal storage yard according to claim 1 or 6, characterized in that: the first belt conveyor is connected with a distributor, one side of the distributor is connected with the double-shaft stirring coal mixer, and the other side of the distributor is used for directly discharging the coal into the coal storage yard.

8. The coal blending management system of the coal storage yard of claim 1, wherein: the discharger adopts a plough type unilateral discharger.

9. The coal blending management system of the coal storage yard of claim 1, wherein: the coal blending equipment is characterized by further comprising power supply equipment for supplying power to the coal blending equipment, wherein the power supply equipment comprises a transformer, a cable, a switch cabinet and a circuit breaker for high-voltage power supply.