CN113716834A

CN113716834A - Wet sludge low-temperature air dryer

Info

Publication number: CN113716834A
Application number: CN202011644555.1A
Authority: CN
Inventors: 项光辉; 朱延军; 周群龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-11-30

Abstract

The wet sludge low-temperature air dryer is characterized in that an air distribution cloth triangle 2 and a heating calandria 3 with low-temperature circulating hot water are alternately arranged in a shell 1, the air distribution cloth triangle 2 is communicated with an air collection chamber 5 from top to bottom when an odd number channel is communicated with the environment, an even number channel is communicated with the environment, a discharging umbrella is also communicated with the environment, dry air is sucked under the action of an exhaust fan, passes through wet sludge heated by the circulating hot water, takes away wet steam, passes through the air collection chamber 5, a wet air outlet 6 and a multi-ring type dust remover, and is finally discharged out of an exhaust fan outlet.

Description

Wet sludge low-temperature air dryer

Technical Field

The invention relates to a low-temperature air dryer for wet sludge.

Background

The disc dryer is a current mainstream sludge dryer and has a series of defects: large investment, high energy consumption and many faults. Although biodrying (biodrying) has low energy consumption, the production intensity is low, and the occupied area is large. The double-heat-source dryer 2015202692312 invented by the applicant has the defects of double heat sources, complex structure and more supporting equipment.

The raw materials fed into the vertical carbonization furnace are required to be granular and are granulated by a granulator, and the granulation by the granulator requires that the moisture content of wet sludge is less than 15%. Although the advanced level of the water content of less than 40 percent is achieved by the plate-and-frame filter press after the patent technology of 'filter pressing method using sludge carbon as filter aid' invented by the applicant is adopted, the requirement of granulation by a granulator is not met. The development of the wet sludge drying machine has the advantages of simple structure, low energy consumption and high efficiency, and can dry wet sludge with the water content of less than 40% to the water content of less than 15%, and is still urgent.

The test shows that: after the technique of the patent of ' filter pressing method using sludge carbon as filter aid ' invented by the applicant CN202010922453.5 ', the obtained filter cake with the water content of 39% is flatly wrapped in a basin, the material layer thickness is 25mm, the water content of the filter cake can be reduced to below 15% when the filter cake is placed in static wind with the ambient temperature of 25-28 ℃ and the relative humidity of 55-65% for 12 hours, and the air drying property of the wet sludge mixed with the sludge carbon is proved to be excellent.

Disclosure of Invention

The invention aims to develop a method for drying wet sludge with the water content of less than 40% to the water content of less than 15% for granulation by a granulator, which has the advantages of simple structure, low energy consumption and high efficiency.

Description of the drawings:

the invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a low-temperature air dryer in vertical section,

figure 2 is a cross-sectional view of figure 1A-a,

FIG. 3 is a schematic sectional side view of the low temperature air dryer,

figure 4 is a cross-sectional view of figures 3B-B,

fig. 5 is a system diagram.

In the figure: the device comprises a shell 1, a cloth triangle with 2 air distribution, a heating calandria 3, a dry air inlet 4, an air collecting chamber 5, a wet air outlet 6, a discharging umbrella 7, a discharging cone 8, a disc discharger 9, a discharging scraper 10, a circulating water inlet header pipe 11, a circulating water outlet header pipe 12, a circulating water inlet branch pipe 13 and a circulating water outlet branch pipe 14.

Detailed description of the preferred embodiments

The technical measures of the invention are that the characteristic of excellent air-drying property of wet sludge mixed with peat is fully utilized, and low-temperature hot water circulation is assisted to accelerate air drying;

the further technical measure of the invention is that an air distribution cloth triangle 2 and a heating calandria 3 are alternately arranged in a shell 1, low-temperature circulating hot water is arranged in the heating calandria 3 to heat wet sludge, and the low-temperature circulating hot water passes through a circulating water inlet main pipe 11, a circulating water inlet branch pipe 13 and the heating calandria 3. The circulating water outlet branch pipe 14 and the circulating water outlet main pipe 12 circulate;

the invention has the technical proposal that when the air distribution triangle 2 is communicated with the air collection chamber 5 from top to bottom in odd channels, the even channels are communicated with the environment, and the discharging umbrella is also communicated with the environment;

the further technical measure of the invention is that under the action of the exhaust fan (see figure 5), dry air is sucked in, passes through wet sludge heated by circulating hot water, takes away wet steam, passes through the air collection chamber 5, the wet air outlet 6, the multi-ring type dust remover and is finally discharged out from the exhaust fan outlet.

Advantageous effects

The characteristic of excellent air drying performance of wet sludge mixed with the peat is utilized, low-temperature hot water circulation is used for accelerating air drying, the energy consumption is low, and the operation is safe and reliable.

Claims

1. Wet mud low temperature air dryer, its characterized in that: the utility model discloses a drying machine, including the casing 1 of desiccator, 1 inner chamber of casing is arranged and is provided with a plurality of cloth wind cloth triangle 2 and heating calandria 3, cloth wind cloth triangle 2 from top to bottom odd number way communicates with each other with wind-collecting chamber 5, and even number way communicates with each other with the environment, have low temperature circulation hot water in the heating calandria 3, low temperature circulation hot water is through circulating water inlet manifold 11, circulating water inlet branch pipe 13, heating calandria 3, circulating water outlet branch pipe 14 and circulating water outlet manifold 12 circulate, the lower part of casing 1, the connection is unloaded awl 8, is equipped with row material umbrella 7 in it, arrange material umbrella 7, have the pipeline to communicate with each other with the environment, the lower part of unloading awl 8 meets with disc unloader 9, disc unloader 9 is last, is equipped with the scraper 10 of unloading.

2. The wet sludge low temperature air dryer of claim 1, wherein: under the action of the exhaust fan, dry air is sucked in, passes through wet sludge heated by circulating hot water, takes away wet steam, passes through the air collecting chamber 5, the wet air outlet 6 and the multi-ring dust remover, and is finally discharged out of the exhaust fan outlet.