CN101832565A

CN101832565A - Electricity-generating method by incinerating paper-making wet sludge

Info

Publication number: CN101832565A
Application number: CN 201010141366
Authority: CN
Inventors: 赵德智
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-06
Filing date: 2010-04-06
Publication date: 2010-09-15
Anticipated expiration: 2030-04-06
Also published as: CN101832565B

Abstract

The invention discloses an electricity-generating method by incinerating paper-making wet sludge, and relates to a waste reutilization technology of paper-making wet sludge. In the method, solid waste wet sludge generated in the paper-making industry are concentrated and dewatered, and then the paper-making wet sludge is incinerated to produce heat energy so as to generate electricity. The method comprises the following steps of: 1. concentrating the sludge: collecting all the sludge produced in the sewage treatment process in a paper mill for concentration; 2. dewatering the sludge: dewatering the paper-making wet sludge having a water content of 95-98% to decrease the water content to 50-75%; and 3. firing in a mixed way: thoroughly and uniformly mixing the concentrated and dewatered sludge with fire coal by a ratio of 1:3, and sending to a heat power plant for boiler combustion, thereby achieving the effects of heating and electricity generation while processing the paper-making sludge. Compared with the traditional paper-making sludge processing technology, the invention better conforms to the requirements for recycling, minimization and harmlessness and the national energy and environmental protection policies. The invention has the advantages of wide applicability, simpler method, easy operation, more cost saving, more convenient popularization, energy saving, environmental friendliness and the like.

Description

Electricity-generating method by incinerating paper-making wet sludge

Technical field

The present invention relates to the wet sludged waste material reutilization technology of a kind of papermaking.

Background technology

Papermaking technology be Ancient Chinese for one of four inventions, be the development of human civilization, especially major contribution has been made in the propagation of cultural knowledge, Zhong Guo paper-making industry leaps to world papermaking big country again in recent years.Along with the develop rapidly of paper industry, its problem of environmental pollution looms large all the more, and country proposes to build " amphitypy " (both resource-conservings and environmentally friendly) society in Eleventh Five-Year Plan for this reason, has strengthened the environmental protection dynamics simultaneously.The just present whole nation, standardization, standardized way have been gone in the sewage disposal of medium-and-large-sized papermaking enterprise, certainly also have some medium-sized and small enterprises can not ensure qualified discharge, when the papermaking wastewater qualified discharge had become main flow, the pollution of paper mill sludge became a focus again.

With regard to straw pulping paper-making, average 2.5 tons of grass are produced one ton of paper pulp, and one ton of cultural paper of bleaching of every in other words production just has 1.5 tons of impurity to discharge with papermaking wastewater.If keep the papermaking wastewater qualified discharge, producing one ton of cultural paper of bleaching so just has 1-1.2 ton dewatered sludge to produce, if these mud are moisture content 95-98%, well imagine the paper mill of 100,000 tons/year of production scales, the annual rare mud that produces certainly will cause environmental hazard.The accumulating of paper industry mud and processing just more and more become focus for this reason.

Paper industry is outer municipal refuse disposal area or the landfill nearby of being transported to the traditional treatment method one of paper mill sludge, and this processing mode can produce secondary pollution; The 2nd, with itself and clay mixed sintering building material brick, but the clay-brickmaking restricted industry that is national industrial policies utilizes potentiality limited; The 3rd, what have carries out burning disposal with deinking mud, but needs to drop into manpower, equipment, fuel etc., and the processing cost height also can pollute environment simultaneously.

Summary of the invention

The purpose of this invention is to provide a kind of electricity-generating method by incinerating paper-making wet sludge, to solve prior art the traditional treatment method of paper mill sludge is easily produced secondary pollution, utilize potentiality limited, need to drop into manpower, equipment, fuel etc., the processing cost height, problem such as treatment effect is low.

The technical solution adopted for the present invention to solve the technical problems be with the wet mud of solid waste that paper industry produces concentrate, processed, the heat energy power-generating that utilizes the papermaking wet sludge incineration to produce.Its papermaking wet sludge incineration generation technology comprises following method step:

1, mud concentrates: the technology of the present invention first step is that these mud are concentrated to sludge concentration tank, this concentration basin is a conical design, and the precipitation that helps mud concentrates, general concentration and settlement time 4-10 hour, sludge concentration is by moisture content 98-99%, simmer down to 95-98%.

2, sludge dewatering: will carry to sludge dewatering equipment and add sludge dehydrating agent simultaneously from the mud of sludge concentration tank, this link can make sludge concentration be changed to 50-75% by moisture content 95-98%.This mud can transport with motor vehicle, is convenient to the married operation with coal, and the water of deviating from enters the regulating reservoir of sewage treatment project and further handles.

3, mixed combustion: the mud after will dewatering fully mixes with coal-fired ratio with 1: 3, goes into driving-belt through diagrid, enters the thermal power plant boiler burning, realizes the recycling of paper mill sludge.Not only handled mud but also heat production generating.Burnt gas and exhaust gas from thermo-electric plant are handled simultaneously, and qualified discharge.

The present invention compares with existing paper mill sludge treatment technology, more meets the requirement of " resource, minimizing, innoxious ".The one, applicability is wide, all paper mills, and no matter both whole paper industry is that waste paper pulp-making, pulping wood, careless class slurrying can both be suitable for; The 2nd, the Treatment of Sludge that wets, simpler, easy to operate than the method for carrying out burning disposal after the oven dry, more cost saving is more convenient for promoting; The 3rd, present technique than traditional sludge processing method further promptly when handling paper mill sludge, also is used for its low combustion value heat heat production and generating; The 4th, present technique is through the enforcement of time more than a year of North China paper industry, and is safe, reliable, stable.If this technology is applied in the whole nation, will produce huge environmental benefit, economic benefit and social benefit.

Description of drawings

Accompanying drawing 1 is the sludge incineration process chart;

The specific embodiment

The concrete processing step of the technology of papermaking wet sludge incineration generating is as follows:

1, mud concentrates: the waste water from the pulping and paper-making workshop is muddy, and colourity is also bigger, most papermaking enterprises, in order to ensure discharged wastewater met the national standard, throw huge fund and build sewage treatment project, though technology is varied, can summarize several forms: i.e. materialization, biochemistry and advanced treating.Make the sewage qualified discharge at last, and from the middle fubril in the muddy sewage in workshop, solid shape sand particle, SS, CODcr, BOD ₅All become rare mud Deng pollutant, be deposited in preliminary sedimentation tank, regulating reservoir, biochemistry pool, second pond etc., regulating reservoir mud, sedimentation basin mud, biochemistry pool mud, flotation tank mud in the sewage disposal process all are collected into sludge concentration tank and concentrate, 8 hours concentration and settlement time, sludge concentration is concentrated into below 97% by moisture content more than 98; The clear water overflow is to the sewage regulating reservoir.

2, sludge dewatering: from the sludge moisture content about 97% of sludge concentration tank, it is carried to sludge dewatering equipment and add sludge dehydrating agent simultaneously, moisture percentage in sewage sludge is reduced to about 65%.The waste water of deviating from is gone into the sewage regulating reservoir and is further handled.

3, mixed combustion: the dewatered sludge after will dewatering fully mixes with coal-fired ratio with 1: 3, enters the thermal power plant boiler burning, realizes the recycling of paper mill sludge, also heat production generating when handling paper mill sludge.Burnt gas and thermal power plant boiler waste gas are handled and qualified discharge simultaneously.

Claims

1. the method for a papermaking wet sludge incineration generating is characterized in that with the wet mud of papermaking be raw material, through concentrating, dewatering, with coal mixed combustion, utilizes its heat energy power-generating, and its method step is as follows:

(1) mud concentrates: regulating reservoir mud, sedimentation basin mud, biochemistry pool mud, flotation tank mud in the sewage disposal process all are collected into sludge concentration tank and concentrate, concentration and settlement time 4-10 hour, sludge concentration was concentrated into 95-98% by moisture content 98-99%;

(2) rare sludge dewatering: from the sludge moisture content 95-98% of sludge concentration tank, it is carried to sludge dewatering equipment and add sludge dehydrating agent simultaneously, make moisture percentage in sewage sludge reduce to 50-75%;

(3) mixed combustion: satisfactory dewatered sludge and coal-fired ratio with 1: 3 are fully mixed, enter the thermal power plant boiler burning, realize the recycling of paper mill sludge.