CN102768526A

CN102768526A - Water-saving, coal-saving and smoke denitration integrated self-adaption coordinated control system of cement plant

Info

Publication number: CN102768526A
Application number: CN2012102841430A
Authority: CN
Inventors: 叶金辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-11
Filing date: 2012-08-11
Publication date: 2012-11-07

Abstract

A water-saving, coal-saving and smoke denitration integrated self-adaption coordinated control system of a cement plant comprises a clinker line central-control distributed control system (DCS), a smoke denitration system, a water-saving system and a cement clinker production coal-saving system and is characterized in that all the systems are connected into the central-control DCS for data communication sharing and integrated structure coordination control. The DCS performs statistic analysis and optimization calculation through field data, automatically adjusts technological parameters and accordingly maximizes energy conservation efficiency of the plant.

Description

Economize on water, economize on coal in the cement mill, denitrating flue gas integrated self-adaptive coordinated control system

Technical field

The invention belongs to automation control area, relate in particular to that economize on water, economize on coal in a kind of cement mill, denitrating flue gas integrated self-adaptive coordinated control system.

Background technology

Oxides of nitrogen (NOx) is the gas that in the burning process process, produces owing to the oxidation of nitrogen, and it not only stimulates people's respiratory system, and the infringement animals and plants damage the ozone layer, and are to cause one of greenhouse effect, acid rain and photochemically reactive main matter.The emission limit set of NOx is required all to be tending towards strict all over the world, and thermal power plant, garbage burning factory and cement mill etc. are as the main source of NOx gaseous emission, it reduces discharging and receives attention especially especially.During 12, the discharging of oxides of nitrogen is put into restrictive index system first.And the discharge capacity of cement industry oxides of nitrogen is the 3rd discharging rich and influential family after thermal power generation, motor vehicle exhaust emission, and concentration of emission has big gap generally at 800-1100mg/m3 than the leading level in the world.Therefore, the emission control of oxides of nitrogen will be the another threshold of cement industry after the newly-increased production capacity of keeping under strict control.Concerning cement production enterprise, it is imperative to carry out denitration.

The cement mill is the water rich and influential family, the cement producing line water, i.e. and production equipment recirculating cooling water system, domestic water system, waterworks for firefighting answers water consumption bigger, and common self-built water supply system satisfies productive life fire-fighting demand.It is main with fire coal that our country produces cement, and new type dry kiln heat consumption of clinker per ton is about 110-130Kg standard coal equivalent.The fuel that cement industry uses occupies suitable ratio in China's fuel consumption.

In recent years; Country advocates energy-saving and emission-reduction energetically, and the denitrating flue gas of cement mill, water saving, that cement clinker production is economized on coal is imperative, and existing flue gas denitrification system, water-saving system, the cement clinker production just system independently separately of system that economizes on coal; Not communication mutually each other; Information can not get exchanging, sharing, and often under maximized situation is economized on coal in pursuit, has wasted a large amount of water on the contrary, can't accomplish the energy-saving benefit maximization of whole factory.

Summary of the invention

In order to address the above problem; The present invention provides that economize on water, economize on coal in a kind of cement mill, denitrating flue gas integrated self-adaptive coordinated control system, and control DCS system during flue gas denitrification system, water-saving system, the cement clinker production system that economizes on coal is all inserted carries out data communication and shares; The control of integral structure harmony; The DCS system carries out statistical study and computation optimization through field data, regulates technological parameter automatically, to reach the maximized purpose of factory's energy-saving benefit.

The technical solution adopted for the present invention to solve the technical problems is: control DCS system during flue gas denitrification system, water-saving system, the cement clinker production system that economizes on coal is all inserted; Carrying out data communication shares; The control of integral structure harmony; The DCS system carries out statistical study and computation optimization through field data, regulates technological parameter automatically.Realize data sharing, resource sharing, coordination control, chain operation, thereby realize partial operation, global monitoring, stabilised quality, raising output, energy saving purposes.

Total system comprises flue gas denitrification system, water-saving system, the cement clinker production system that economizes on coal, the EPA at control DCS system place during each system inserts.Through EPA, each system can carry out partial data point effective communication, and field data is shared, the control of integral structure harmony; Data acquisition center transfers to database server with the on-site real-time parameter signal that collects and preserves; Data are extracted also analyzing and processing, computation optimization through the process data analytic system then; Calculate optimized parameter and transfer to active station according to field condition, instruct each system equipment to be configured running; The process data analytic system writes down real-time technological parameter; Division technique section and equipment group generate grog Wiring technology curve and energy-conservation curve; Operational factor model through setting up a perfect condition is the basis, constantly upgrades the technology controlling and process rule automatically according to historical data, through fine setting and forecast analysis; Carry out early warning in advance; And the Passive Control parameter of change regulating local control according to the active adjustment parameter, Automatic Optimal is regulated flue gas denitrification system, water-saving system, the cement clinker production systematic parameter of economizing on coal under the prerequisite that guarantees grog line ordinary production, makes factory's energy-saving benefit realize maximization.

The invention has the beneficial effects as follows; Control DCS system realized that integrated self-adaptive coordinates control during flue gas denitrification system, water-saving system, the cement clinker production system that economizes on coal inserted; Automatic Optimal regulating system parameter under the prerequisite that has guaranteed grog line ordinary production makes and factory's energy-saving benefit maximization has also reduced construction cost simultaneously; Reduce the staff, reduce labour intensity.

Description of drawings

Below in conjunction with accompanying drawing the present invention is further specified.

Fig. 1 is a system construction drawing of the present invention.

1. engineer stations among the figure are controlled DCS in 2., 3. flue gas denitrification system, 4. water-saving system, 5. economize on coal system, 6. EPA of cement clinker production.

Embodiment

Total system comprises flue gas denitrification system, water-saving system, the cement clinker production system that economizes on coal, the EPA at control DCS system place during each system inserts.Through same EPA, each system can carry out partial data point effective communication, and multiple domain is coordinated control.

Field layer: the site intelligent bus apparatus adopts Profibus DP communication standard and cpu controller to communicate;

Control and management layer: adopt the EPA ICP/IP protocol to realize the communication between system controller and the active station; Separately between each layer connect each other again, connect through computer network system, to reach the decentralised control of DCS, the purpose of centralized management.

With the bus type topological structure is example, with controlling DCS, flue gas denitrification system, water-saving system, the cement clinker production system's access industrial Ethernet of economizing on coal in engineer station, the clinker cement.

Operating personnel keep watch on total system on engineer station ES and active station OS, in this process, divide the start-stop of territory, branch authority control field apparatus and the modification of technological parameter according to on-the-spot actual demand, and instruction issuing is handled to PS.

Claims

A cement mill economize on water, economize on coal, denitrating flue gas integrated self-adaptive coordinated control system; Comprise in the grog line control DCS system, flue gas denitrification system, water-saving system, the cement clinker production system that economizes on coal, it is characterized in that the shared same EPA of each system.