CN111056727A

CN111056727A - Hot air equipment for sludge drying

Info

Publication number: CN111056727A
Application number: CN201911400586.XA
Authority: CN
Inventors: 辛政君; 张雪海; 马彦峰
Original assignee: Urumqi Kefa Tongyuan Environmental Protection Technology Co Ltd
Current assignee: Xinjiang Origin Water Environmental Resource Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-04-24
Anticipated expiration: 2039-12-30
Also published as: CN111056727B

Abstract

The invention discloses a hot air device for sludge drying, which comprises a feed hopper 1, an air blower 9, a manual butterfly valve 10, a pneumatic butterfly valve 11, a feeding screw 12 and a box body 4, wherein a star-shaped feeder 2 and the feed hopper 1 are sequentially arranged at the top end of the box body 4 from bottom to top, air outlets 3 are respectively arranged at two sides of the upper part of the box body 4, a breathable tray 6 is sequentially arranged in the lower part of the box body 4 from top to bottom, a rotating shaft of the breathable tray 6 extends to the outside of the box body 4 and is connected with a pneumatic actuator 5, a discharge hopper 7 and a pneumatic gate valve 8 are arranged below the breathable tray 6, the air blower 9 is connected to the side wall of the box body 4 between the discharge hopper 7 and the breathable tray 6 through a pipeline provided with the manual butterfly valve 10 and the pneumatic butterfly valve 11, the feeding screw 12 is positioned above the feed hopper 1. The invention can reduce the water content of the sludge discharged by the sewage treatment plant to below 60 percent by utilizing the hot air generated by the blower.

Description

Hot air equipment for sludge drying

Technical Field

The invention belongs to the field of sewage and sludge treatment, and relates to a hot air device for sludge drying.

Background

Since 2015, the national requirements for sludge treatment and disposal are higher and higher, and at present, the water content of sludge in most domestic areas must be reduced from 80% to 60% and then the sludge can be landfilled. The mature drying technologies at present in China include plate-and-frame filter pressing dehydration, traditional heat drying (hollow blade), solar sludge drying, sludge low-temperature condensation drying and the like. Modifiers such as lime and the like are required to be added for plate-frame filter pressing dehydration, which brings inconvenience to subsequent sludge treatment, and the requirement on the water content of the sludge cannot be met if the requirement is further improved; the traditional heat drying technology has the disadvantages that the energy consumption for sludge treatment is large and the cost is high because the heat energy loss is serious and the sludge cannot be recycled, and the drying temperature is as high as 150-200 ℃, so that the hidden danger of sludge dust explosion exists; the solar sludge treatment technology is limited by the self treatment capacity, and the capital construction cost requirement is high; the low-temperature sludge condensation drying technology is immature at present, and the actual operation has large energy consumption and low productivity.

Disclosure of Invention

The invention aims to provide a hot air device for drying sludge, which can reduce the water content of the sludge discharged by a sewage treatment plant to below 60% by utilizing hot air generated by a blower.

The technical scheme is as follows: the utility model provides a hot-blast equipment for sludge drying, including feeder hopper 1, air-blower 9, manual butterfly valve 10, pneumatic butterfly valve 11, pay-off spiral 12 and

box

4, 4 tops of box are setting gradually star type feeder 2 and feeder hopper 1 by going up, 4 upper portion both sides of box are setting up air outlet 3 respectively, set gradually ventilative tray 6 by last under to in the 4 lower parts of box, the pivot of ventilative tray 6 extends 4 outsides of box and links to each other with a pneumatic actuator 5, ventilative tray 6 below is setting up out hopper 7 and pneumatic push-pull valve 8, air-blower 9 is through installing manual butterfly valve 10 and pneumatic butterfly valve 11's pipe connection on 4 lateral walls of box between hopper 7 and ventilative tray 6, pay-off spiral 12 is located feeder hopper 1 top, viewing aperture 13 sets up on the lateral wall of box 4.

The ventilating tray 6 comprises a long groove body, the bottom surface of the long groove body is open, a plurality of angle irons are uniformly arranged in the long groove body at intervals along the long edge direction of the long groove body, gaps are reserved among the angle irons, the size of each gap is 5mm, and the top ends of the angle irons are all parallel to the wide edge of the long groove body.

Firstly, a hot air conveying system is started, sludge is conveyed to a feeding machine by a sludge conveyor, the feeding machine conveys quantitative sludge into a box body and enables the quantitative sludge to stay on a breathable tray in the box body, dry hot air from an air blower and the sludge are subjected to heat source exchange and take away redundant moisture, after the moisture content of the sludge is reduced to a required value, an air inlet channel valve is automatically closed, the breathable tray in the box body is turned over for 90 degrees, the dry sludge falls downwards by means of self gravity, and the dry sludge falls out of the box body and is conveyed to a loading position by a conveying belt. Within the normal load range of the blower, a plurality of independent boxes can be arranged in the system to realize the adjustment of the sludge yield and meet the requirement of continuous operation.

Compared with the prior art, the invention has the advantages that: 1. the sludge drying efficiency can be regulated and controlled. 2. Belongs to the field of low-temperature drying. 3. The water content of the dried sludge can be regulated and controlled. 4. Can output stably and continuously with high efficiency. 5. The equipment occupies small area and has lower investment cost. 6. Simple structure and convenient disassembly, assembly and maintenance.

Drawings

The present invention will be described in further detail below with reference to the accompanying drawings.

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a view showing the operation state of the ventilating tray of the present invention;

FIG. 4 is a schematic sectional front view of the breathable tray of the present invention;

fig. 5 is a discharge state diagram of the ventilating tray of the present invention.

Detailed Description

The utility model provides a hot-blast equipment for sludge drying, as shown in fig. 1-5, including feeder hopper 1, air-blower 9, manual butterfly valve 10, pneumatic butterfly valve 11, pay-off spiral 12 and box 4, box 4 top is setting gradually star type feeder 2 and feeder hopper 1 from bottom to top, box 4 upper portion both sides are setting up air outlet 3 respectively, set gradually ventilative tray 6 by top to bottom in the box 4 lower part, the pivot of ventilative tray 6 extends the box 4 outside and links to each other with a pneumatic actuator 5, ventilative tray 6 below is setting up out hopper 7 and pneumatic gate valve 8, air-blower 9 is through installing manual butterfly valve 10 and pneumatic butterfly valve 11 the pipe connection on the box 4 lateral wall between play hopper 7 and ventilative tray 6, pay-off spiral 12 is located feeder hopper 1 top, viewing aperture 13 sets up on the lateral wall of box 4.

The working process of the equipment is as follows: firstly, the blower 9 starts to work, the pneumatic butterfly valve 11 on the corresponding air supply channel of the working box body is opened, and air is supplied from the bottom to the upper part. After the sludge enters the feeding screw 12, feeding is started from the first running box 4 of the system, and after the feeding task of each box 4 is finished, the feeding procedure of the next box can be started. Mud at first gets into feeder hopper 1, send into star type dispenser 2 with mud through feeder hopper 1, star type dispenser 2 carries mud to box 4 in again, and the mud on ventilative tray 6 carries out the heat exchange with the dry hot-blast heat that air-blower 9 carried, and when waiting for the mud moisture content to reduce to the required value, pneumatic executor 5 begins to work, begins to unload after 6 rotatory 90 of ventilative tray, and mud freely drops to play hopper 7, and pneumatic push-pull valve 8 is opened, and mud is carried to the loading position after 7 drops to conveyer belt 14 from going out hopper.

The equipment control process comprises the following steps: the feeding screw 12 performs periodic feeding operation (quantification and timing) on each box body according to the working period of each box body, and the working period can be set according to the time length required by drying the sludge under the current conditions (the water content and the working environment temperature). The wind pressure in the air supply channel can be adjusted to proper pressure by adjusting the manual butterfly valve 10, and when the pneumatic butterfly valve 11 breaks down, the manual butterfly valve 10 can also be used as an emergency switch, so that the safe operation of equipment is guaranteed. During the operation of the device, the manual butterfly valve 10 is always in a normally open state. The pneumatic butterfly valve 11 is controlled according to the working state of the box body 4, and when the box body 4 is in the drying process, the pneumatic butterfly valve 11 is normally opened. After the drying process of the box body 4 is finished, the pneumatic butterfly valve 11 is closed, and when the feeding screw feeds the box body again, the pneumatic butterfly valve 11 is opened again. The observation window 13 can be used as an observation window and an inspection window for the operation of the equipment.

Claims

1. The utility model provides a hot-blast apparatus for sludge drying, includes feeder hopper (1), air-blower (9), manual butterfly valve (10), pneumatic butterfly valve (11), pay-off spiral (12) and box (4), characterized by: the box (4) top is setting gradually star type dispenser (2) and feeder hopper (1) from bottom to top, box (4) upper portion both sides are setting up air outlet (3) respectively, set gradually ventilative tray (6) by the top down in box (4) lower part, the pivot of ventilative tray (6) extends box (4) outside and links to each other with a pneumatic actuator (5), ventilative tray (6) below is setting up out hopper (7) and pneumatic gate valve (8), air-blower (9) are through installing manual butterfly valve (10) and the pipe connection of pneumatic butterfly valve (11) on box (4) lateral wall between hopper (7) and ventilative tray (6), pay-off spiral (12) are located feeder hopper (1) top, viewing aperture (13) set up on the lateral wall of box (4).

2. Hot air device according to claim 1, characterized in that: the breathable tray (6) comprises a long groove body (20), the bottom surface of the long groove body (20) is open, a plurality of angle irons (21) are uniformly arranged in the long groove body (20) at intervals along the long side direction of the long groove body, gaps (22) are reserved between the angle irons (21), the size of each gap (22) is 5mm, and the top ends (23) of the angle irons (21) are all parallel to the wide edges (24) of the long groove body.