A high-moisture-content municipal sludge conveying device for coal-fired units

Abstract

The present application relates to a kind of high water content urban sludge conveying device for coal-fired unit, including multiple unloading components, upper feeding belt conveyor, weighing belt conveyor, belt scale, coal drop pipe and upper coal belt conveyor, the upper feeding belt conveyor is inclined to be set up, the unloading component is set in the upper feeding belt conveyor, the weighing belt conveyor is set in the end of upper feeding belt conveyor, the coal drop pipe is set in the end of weighing belt conveyor, the upper coal belt conveyor is set in the below of coal drop pipe, the belt scale is set in weighing belt conveyor.Compared with prior art, the present application can adjust the amount of sludge unloading, control the mixing ratio of sludge, realize the treatment of high water content sludge, reduce the investment of drying system, reduce investment cost, reduce daily energy consumption and operating expenses.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sludge treatment, in particular to a high-moisture-content municipal sludge conveying device for a coal-fired unit. BACKGROUND

[0002] Municipal sludge is an inevitable by-product of municipal wastewater treatment and sewage treatment. With the increasing service level of modern municipal facilities and the increasing urban population, the discharge of municipal domestic sewage is also increasing, resulting in a large amount of sludge generated in the process of municipal sludge treatment. The composition of sludge is complex, which contains organic matter and nutrient elements with agricultural resource value, and also contains harmful substances to the environment such as heavy metals, pathogenic bacteria, viruses and toxic organic matter. Therefore, if the municipal sludge is not properly treated, it will inevitably harm the environment in which we live. At present, sludge incineration has become the mainstream technology for sludge treatment in developed countries. In recent years, the use of power plant boilers for mixed burning of sludge has also been applied in China. In the early stage, there were more thermal power plants using fluidized beds, and at present, more than ten coal-fired power plants have carried out mixed burning of sludge.

[0003] For sludge with a moisture content of about 60%, the sludge is in a viscous zone and has a certain viscosity, so direct blending and burning will cause the conveying system to be blocked. Therefore, the current coal-fired power plants (not including fluidized bed units) for disposing municipal sludge with a moisture content of about 60% mainly use drying and blending, that is, using direct heating rotary drum drying (flue gas), indirect heating rotary drum drying (steam), centrifugal drying, indirect heating multi-disc drying and other technologies to dry the municipal sludge with a moisture content of 60% to a moisture content of 30-40% and then mix it with coal and send it into the boiler for burning. Compared with direct blending and burning, the drying and blending process consumes a large amount of heat, the economic efficiency decreases, and the investment cost greatly increases. SUMMARY

[0004] The purpose of the present application is to overcome the defects of the prior art and provide a high-moisture-content municipal sludge conveying device for a coal-fired unit.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A high-moisture-content municipal sludge conveying device for a coal-fired unit, comprising a plurality of discharging assemblies, an upper belt conveyor, a weighing belt conveyor, a belt scale, a coal falling pipe and an upper coal belt conveyor,

[0007] The upper belt conveyor is inclined upward, the discharging assemblies are arranged above the upper belt conveyor, the weighing belt conveyor is arranged at the end of the upper belt conveyor, the coal falling pipe is arranged at the end of the weighing belt conveyor, the upper coal belt conveyor is arranged below the coal falling pipe, and the belt scale is arranged on the weighing belt conveyor.

[0008] Preferably, each of the feeding assemblies comprises a plurality of hoppers and a feeding belt conveyor, the hoppers are arranged above the feeding belt conveyor, and the end of the feeding belt conveyor is located above the feeding belt conveyor.

[0009] Preferably, each of the feeding assemblies further comprises a plurality of activated feeders, and the activated feeders are arranged at the discharge ports of the hoppers.

[0010] Preferably, each of the feeding assemblies comprises two hoppers.

[0011] Preferably, the hoppers are vibrating hoppers.

[0012] Preferably, the inclination angle of the feeding belt conveyor ranges from 0 to 30 degrees.

[0013] Preferably, the coal falling pipe is a three-way coal falling pipe, the conveying device comprises two coal feeding belt conveyors, the first outlet of the three-way coal falling pipe is arranged above one of the coal feeding belt conveyors, and the second outlet of the three-way coal falling pipe is arranged above the other coal feeding belt conveyor.

[0014] Preferably, the belt scale is an ICS-17A electronic belt scale.

[0015] Preferably, the feeding belt conveyor is a tubular belt conveyor.

[0016] Preferably, the conveying device comprises two feeding assemblies.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The present application utilizes the feeding assembly, the feeding belt conveyor, the weighing belt conveyor and the coal falling pipe to sequentially cooperate, effectively conveying the sludge to the coal feeding belt conveyor, utilizing the activated feeder to improve the controllability of the feeding, the weighing belt conveyor can effectively measure the weight of the sludge, adjust the feeding amount of the sludge, control the mixing ratio of the sludge, realize the treatment of the sludge with high water content, reduce the investment of the drying system, reduce the investment cost, reduce the daily energy consumption, and reduce the operating cost.

[0019] 2. The feeding belt conveyor is a tubular belt conveyor, which can ensure the scattering of the sludge and the disordered emission of the odor gas during the long-distance conveying process, and the maximum inclination angle of the tubular belt conveyor can reach 30°, while the maximum inclination angle of the ordinary belt conveyor is 18°, and the larger inclination angle can shorten the length of the climbing slope and save a certain length of space. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0021] Wherein, 1, silo, 2, activated feeder, 3, discharging belt conveyor, 4, feeding belt conveyor, 5, weighing belt conveyor, 6, belt scale, 7, coal falling pipe, 8, coal feeding belt conveyor. DETAILED DESCRIPTION

[0022] The application will be described in detail below with reference to the drawings and specific embodiments. Note that the following description of embodiments is merely illustrative and the application is not intended to limit the scope of application or its use, and the application is not limited to the following embodiments.

[0023] EMBODIMENT

[0024] A high-moisture-content municipal sludge conveying device for coal-fired units can convey high-moisture-content sludge and handle municipal sludge with a moisture content of 60%, such as Figure 1 As shown, it comprises two discharging assemblies, a feeding belt conveyor 4, a weighing belt conveyor 5, a belt scale 6, a coal falling pipe 7, and a coal feeding belt conveyor 8.

[0025] Each discharging assembly comprises two silos 1, two activated feeders 2, and a discharging belt conveyor 3. The silos 1 are arranged above the discharging belt conveyor 3, and the activated feeders 2 are arranged at the discharge port of the discharging belt conveyor 3. The end of the discharging belt conveyor 3 is located above the feeding belt conveyor 4. In order to improve the conveying and storage effect of high-moisture-content sludge, the silos 1 are vibrating silos.

[0026] The feeding belt conveyor 4 is arranged obliquely upward. In order to improve the conveying effect and shorten the climbing length by increasing the conveying inclination angle, the feeding belt conveyor 4 is a tubular belt conveyor, and the inclination angle of the feeding belt conveyor 4 ranges from 0 to 30 degrees.

[0027] The weighing belt conveyor 5 is arranged at the end of the feeding belt conveyor 4, and the belt scale 6 is arranged on the weighing belt conveyor 5 to weigh the sludge on the weighing belt conveyor 5. In this embodiment, the belt scale 6 is an ICS-17A electronic belt scale.

[0028] In this embodiment, two coal feeding belt conveyors 8 are arranged. In order to correspond to them, the coal falling pipe 7 is a three-way coal falling pipe, and the opening and closing of one inlet and two outlets thereof can be controlled by valves. The coal falling pipe 7 is arranged at the end of the weighing belt conveyor 5 to receive sludge from the weighing belt conveyor 5. The first outlet of the three-way coal falling pipe is arranged above one coal feeding belt conveyor 8, and the second outlet of the three-way coal falling pipe is arranged above the other coal feeding belt conveyor 8.

[0029] Working principle:

[0030] The sludge transport vehicle unloads the sludge to the bunker 1, and the sludge is vibrated by the activation feeder 2 to the unloading belt conveyor 3, which transfers the sludge to the feeding belt conveyor 4, which transfers the sludge to the weighing belt conveyor 5, and the sludge is transferred to the coal feeding belt conveyor 8 through the coal falling pipe 7 after passing through the belt scale 6, and the sludge is mixed with the coal on the coal feeding belt conveyor 8, and then is sent to the pulverizing system for grinding and then is burned in the furnace, and the belt scale 6 controls the sludge unloading amount of the activation feeder 2 according to the fuel amount, and controls the mixing ratio of the coal sludge.

[0031] The above-described embodiments are merely examples and do not represent a limitation on the scope of the present application. These embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the technical idea of the present application.

Claims

1. A high-moisture-content municipal sludge delivery device for coal-fired power plants, characterized by, It comprises a plurality of discharging assemblies, a feeding belt conveyor (4), a weighing belt conveyor (5), a belt scale (6), a coal falling pipe (7) and a coal feeding belt conveyor (8), The feeding belt conveyor (4) is arranged obliquely upwards, the discharging assembly is arranged above the feeding belt conveyor (4), the weighing belt conveyor (5) is arranged at the end of the feeding belt conveyor (4), the coal falling pipe (7) is arranged at the end of the weighing belt conveyor (5), the coal feeding belt conveyor (8) is arranged below the coal falling pipe (7), and the belt scale (6) is arranged on the weighing belt conveyor (5), Each discharging assembly comprises a plurality of silos (1) and a discharging belt conveyor (3), the silos (1) are arranged above the discharging belt conveyor (3), and the end of the discharging belt conveyor (3) is located above the feeding belt conveyor (4), Each discharging assembly further comprises a plurality of activated feeders (2), and the activated feeders (2) are arranged at discharge ports of the silos (1), The coal falling pipe (7) is a three-way coal falling pipe, the conveying device comprises two coal feeding belt conveyors (8), a first outlet of the three-way coal falling pipe is arranged above one of the coal feeding belt conveyors (8), and a second outlet of the three-way coal falling pipe is arranged above the other coal feeding belt conveyor (8), The sludge transportation vehicle discharges sludge into the silo (1), and the sludge is vibrated and fed to the discharging belt conveyor (3) through the activated feeder (2), the sludge is transported to the feeding belt conveyor (4) through the discharging belt conveyor (3), the sludge is transported to the weighing belt conveyor (5) through the feeding belt conveyor (4), the sludge enters the coal feeding belt conveyor (8) through the coal falling pipe (7) after passing through the belt scale (6), the sludge is mixed with the coal on the coal feeding belt conveyor (8) and then is sent into a pulverizing system to be ground and then is burned in a furnace, the belt scale (6) controls the sludge discharging amount of the activated feeder (2) according to the fuel amount, and the mixing ratio of the sludge is controlled, The silo (1) is a vibrating silo, The inclination angle of the feeding belt conveyor (4) ranges from 0 to 30 degrees, The belt scale (6) is an ICS-17A electronic belt scale, The feeding belt conveyor (4) is a tubular belt conveyor, The sludge is sequentially conveyed to the coal feeding belt conveyor (8) through the cooperation of the discharging assembly, the feeding belt conveyor (4), the weighing belt conveyor (5) and the coal falling pipe (7), the controllability is improved by discharging through the activated feeder (2), the sludge weight is measured by the weighing belt conveyor (5), the sludge discharging amount is adjusted, the mixing ratio of the sludge is controlled, and the sludge with high water content is treated.

Images