5results about How to "Increase burnout" patented technology

The invention provides an adjusting system and method for rapid load change of a coal-fired power generation unit, and relates to the technical field of coupling heat storage rapid peak regulation. The adjusting system comprises a heat storage device used for extracting and cooling main steam flowing through a main steam pipeline so as to form a steam-water mixture in the heat storage device; the feed water heating device is used for heating the feed water fed into the coal economizer by utilizing the steam-water mixture in the heat storage device; and the hot air heating device is used for heating hot air sent out from the air outlet of the air pre-heater through main steam, the hot air is heated by the main steam and then becomes first steam to enter the feed water heating device, and the feed water heating device can further heat feed water sent into the economizer through the first steam. According to the adjusting system and method, the heat storage capacity of the coal-fired power generation unit is improved, the heat storage capacity of the heat storage device is improved, and therefore the load adjusting rate of the unit is increased, and the problem that in the prior art, the variable load adjusting rate of the coal-fired power generation unit is insufficient is solved.

This utility model discloses a tangential combustion system for pulverized coal boilers suitable for low-volatile coal types. It includes a boiler body, an air preheater, a secondary air fan, a primary air fan, and multiple coal mills. Each coal mill outlet is connected to multiple pulverized coal pipes. All pulverized coal pipes are connected to pulverized coal burners on the boiler body. Each pulverized coal burner is equipped with a burner air box. The secondary air fan outlet is connected to the burner air box via the air preheater. The primary air fan outlet is divided into two paths: one path connects to the hot primary air duct after passing through the air preheater, and the other path directly connects to the inlet of the hot primary air duct. The hot primary air duct outlet is divided into two paths: one path directly connects to the inlet of each coal mill, and the other path connects to the pulverized coal pipe at the outlet of each coal mill via a bypass hot primary air duct. This utility model can significantly increase the initial temperature of pulverized coal entering the furnace, improving the ignition and stable combustion capabilities of low-volatile coal.

The invention relates to a front and rear wall opposed firing boiler and a thermal generator set, the front and rear wall opposed firing boiler comprises a boiler body and a plurality of combustors, the boiler body comprises a front wall and a rear wall which are oppositely arranged, the front wall and the rear wall are each provided with at least three combustor layers which are arranged at intervals in the vertical direction, each combustor layer comprises at least one combustor, and the combustor is arranged on the front wall and the rear wall. The distance between the two adjacent burner layers which are arranged on the front wall and are closest to the upper portion is larger than the distance between the two adjacent burner layers which are arranged on the lower portion, and the distance between the two adjacent burner layers which are arranged on the rear wall and are closest to the upper portion is larger than the distance between the two adjacent burner layers which are arranged on the rear wall and are closest to the lower portion. According to the front and rear wall opposed firing boiler, the situation that the temperature in the hearth continuously rises from bottom to top is avoided, so that the situation that the temperature of the upper area in the hearth is too high due to heating is avoided, and then the situations that a nozzle of the combustor is burnt out, and the nozzle area of the combustor is coked are avoided.

The present invention relates to a method for real-time control of the concentration of coal powder in a medium-speed coal mill by speed-changing regulation of a rare earth motor, comprising the steps of: conducting an operation test of the coal mill at different rotation speeds and different primary air volumes at the inlet of the coal mill under the condition of the same coal type and the same coal feed amount; optimizing the original air-coal ratio curve of the pulverizing system; and obtaining the air-coal ratio curve of the coal mill at different rotation speeds. The beneficial effects of the present invention are: for the different rotation speed states of the speed-changing pulverizer, the optimal air-coal ratio curve corresponding to the pulverizer at each rotation speed is proposed, the real-time control of the concentration of coal powder in the medium-speed coal mill is realized, and the stability of the ignition and combustion of coal powder at each rotation speed is improved; the problem of poor combustion stability and burnout performance of coal powder when burning low calorific value and high ash content coal is effectively solved, and the combustion stability and burnout performance of coal powder can also be improved, and the safety, stability and economy of the unit operation are further improved.

The utility model relates to the technical field of boilers, in particular to a circulating fluidized bed boiler air distribution system which comprises a boiler, an air distribution plate, a fixing frame and an impeller, the boiler is provided with a containing cavity, the containing cavity is divided into a combustion chamber and an air chamber through the air distribution plate, the combustion chamber is arranged above the air distribution plate, and an air inlet is formed in the side wall of the boiler and communicates with the air chamber; the fixing frame is fixedly connected to the inner wall of the air chamber, the height of the fixing frame is larger than that of the air inlet, the impellers are coaxially and fixedly connected with a driving shaft, the driving shaft is rotatably connected to the fixing frame around the axis of the driving shaft, the rotating axis of the driving shaft is vertical, and the multiple impellers are evenly arranged at intervals in the width direction of the air chamber. The adjacent driving shafts are connected through a synchronizing piece. Air enters the air chamber from the air inlet to push the impellers to rotate, the impellers drive the adjacent impellers to rotate through the synchronizing pieces while rotating, the multiple impellers are the same in rotating speed, air is supplemented through the impellers in the area with the small air volume, air distribution in the air chamber is promoted to be uniform, and air distribution uniformity is improved.