CN203963955U - A kind of coal-burning power plant mud is mixed burning system - Google Patents

Abstract

The utility model discloses a kind of coal-burning power plant mud and mix burning system, comprise boiler furnace, chimney and the connection flue between boiler furnace and chimney, the flue gas producing in described boiler furnace is discharged by chimney after by flue, pollutant control device for removing flue gas pollutant is installed in described flue, it is characterized in that: described mud mix burning system also comprise pulverized coal preparation system, for delivery of the feeder conveyer belt of raw coal with for delivery of the screw(-type) feeder of mud; The discharging opening of described screw(-type) feeder is arranged on the top of feeder conveyer belt, feeder conveyer belt is put into raw coal in pulverized coal preparation system together with the mud of screw(-type) feeder output, and described pulverized coal preparation system is blown in described boiler furnace after mud and raw coal are ground into powder.The utility model can make mud supply flow rate obtain controlling more accurately, and makes mud and raw coal more easily in boiler furnace, realize fully burning.

Description

A kind of coal-burning power plant mud is mixed burning system

Technical field

The utility model relates to a kind of coal-burning power plant mud and mixes burning system.

Background technology

In sewage sludge, contain a large amount of organic pollutions, contain the potential poisonous and harmful elements such as pathogen, heavy metal, carcinogenic chemical simultaneously, along with the quickening of Urbanization in China, treatment rate of domestic sewage improves year by year, the sludge yield of municipal sewage plant also sharply increases, after the mud entered environment of suitably processing, can bring secondary pollution to water body and atmosphere, not only reduce the effective processing capacity of sewage disposal system, and ecological environment and mankind's activity have been formed to serious threat.At present, how harmless resource utilization lignin-sludge has become more and more important problem.Burning disposal is a kind of main method of effective lignin-sludge, can make its minimizing, innoxious.

Sewage sludge harmlessness processing is that mud is mixed one of main purpose of burning, mud is mixed burning can utilize the existing pollutant control device in coal-burning power plant, the harmful components that produce in lignin-sludge burning process, as heavy metal, SO2, NOx etc., mix after fuel burning burns it and reach discharging standards.And for power plant, in power plant operation cost 60%～70%, from fuel cost, utilize the calorific value in mud, and carry out burning mixed mud and can reduce the fuel cost of coal-burning power plant, reduce power plant's production cost.

Utility model content

Technical problem to be solved in the utility model is: provide a kind of coal-burning power plant mud to mix burning system.

Solve the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:

A kind of coal-burning power plant mud is mixed burning system, comprise boiler furnace, chimney and the connection flue between boiler furnace and chimney, the flue gas producing in described boiler furnace is discharged by chimney after by flue, pollutant control device for removing flue gas pollutant is installed in described flue, it is characterized in that: described mud mix burning system also comprise pulverized coal preparation system, for delivery of the feeder conveyer belt of raw coal with for delivery of the screw(-type) feeder of mud; The discharging opening of described screw(-type) feeder is arranged on the top of feeder conveyer belt, feeder conveyer belt is put into raw coal in pulverized coal preparation system together with the mud of screw(-type) feeder output, and described pulverized coal preparation system is blown in described boiler furnace after mud and raw coal are ground into powder.

As a kind of embodiment of the present utility model, economizer and air preheater are also installed in described flue, described pollutant control device comprises electrostatic precipitator and wet method fume desulfurizing system, and described economizer, air preheater, electrostatic precipitator and wet method fume desulfurizing system are arranged in described flue to the direction of chimney successively by boiler furnace.

For the ease of controlling the mud supply flow rate of screw(-type) feeder, as a kind of embodiment of the present utility model, described screw(-type) feeder is driven by motor, described coal-burning power plant's mud is mixed burning system and is also comprised the controller for controlling described motor speed, and the output of described controller is electrically connected with the control end of motor.

For the ease of providing foundation for the flow of screw(-type) feeder output mud, described coal-burning power plant's mud is mixed burning system and is also comprised for detection of the LOAD CELLS of carrying the real-time quality of raw coal on described feeder conveyer belt, be arranged in the flue gas real-time traffic of pipeline section and the continuous on-line monitoring system of flue gas pollutant of pollutant real-time concentration after pollutant control device for detection of the velocity sensor of the real-time transfer rate of described feeder conveyer belt and for detection of described flue, described LOAD CELLS and velocity sensor are arranged on respectively on feeder conveyer belt, the detection probe of the continuous on-line monitoring system of described flue gas pollutant is arranged on flue and is arranged in pollutant control device pipeline section afterwards.

Compared with prior art, the utlity model has following beneficial effect:

Coal-burning power plant of the present utility model mud is mixed burning system and is adopted screw(-type) feeder to realize the supply of mud, and be blown in boiler furnace after mud and raw coal being ground into powder with pulverized coal preparation system, therefore, the utility model can make mud supply flow rate obtain controlling more accurately, and makes mud and raw coal more easily in boiler furnace, realize fully burning.

Brief description of the drawings

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:

Fig. 1 is that coal-burning power plant of the present utility model mud is mixed the structural representation of burning system.

Detailed description of the invention

As shown in Figure 1, coal-burning power plant of the present utility model mud is mixed burning system, comprises pulverized coal preparation system, for delivery of the feeder conveyer belt 7 of raw coal, screw(-type) feeder 9 for delivery of mud, boiler furnace 1, chimney 6 be communicated with the flue between boiler furnace 1 and chimney 6.The discharging opening of screw(-type) feeder 9 is arranged on the top of feeder conveyer belt 7, feeder conveyer belt 7 is exported raw coal mud together with screw(-type) feeder 9 is put in pulverized coal preparation system, and pulverized coal preparation system is ground into mud and raw coal after fuel powder and is blown in boiler furnace 1 and burns; The flue gas of boiler furnace 1 interior generation is discharged by chimney 6 after by flue, economizer 2, air preheater 3 are installed and for removing the pollutant control device of flue gas pollutant in flue, pollutant control device comprises electrostatic precipitator 4 and wet method fume desulfurizing system 5, economizer 2, air preheater 3, electrostatic precipitator 4 and wet method fume desulfurizing system 5 are arranged in flue to the direction of chimney 6 successively by boiler furnace 1, pollutant control device carries out pollutant removing to the flue gas by flue, finally by draining into atmosphere by chimney 6.

Screw(-type) feeder 9 of the present utility model is driven by motor, and coal-burning power plant's mud is mixed burning system and also comprised the controller for controlling motor speed, and the output of controller is electrically connected with the control end of motor, so that control the mud supply flow rate of screw(-type) feeder.

Coal-burning power plant of the present utility model mud is mixed burning system and is also comprised for detection of the LOAD CELLS 901 of real-time quality of carrying raw coal on feeder conveyer belt 7, be arranged in the flue gas real-time traffic of pipeline section and the continuous on-line monitoring system 10 of the flue gas pollutant of pollutant real-time concentration after pollutant control device for detection of the velocity sensor 902 of the real-time transfer rate of feeder conveyer belt 7 and for detection of flue, LOAD CELLS 901 and velocity sensor 902 are arranged on respectively on feeder conveyer belt 7, the detection probe of the continuous on-line monitoring system 10 of flue gas pollutant is arranged on flue and is arranged in pollutant control device pipeline section afterwards, so that provide foundation for the flow of screw(-type) feeder output mud.

The invention also discloses above-mentioned coal-burning power plant mud and mix the intelligent supply method of burning system, comprise the following steps:

S1: in the mud that mensuration screw(-type) feeder 9 is carried, (unit is mg/m for degree N, S, Hg and the A of nitrogen oxide NOx, sulfide SOx, mercury Hg and ash content A ³), and pollutant control device removes the removal efficiency η of nitrogen oxide, sulfide, mercury and ash content _n, η _s, η _hgand η _a(in general, the pollutant control device that existing coal-burning power plant adopts can reach respectively 95%, 95% and 99% to the removal efficiency of nitrogen oxide, sulfide and ash content, be 20%～50% left and right to the removal efficiency of mercury), and obtain nitrogen oxide, sulfide, mercury and ash content that said determination goes out and change into the conversion share K of pollutant by the mode of tabling look-up _n, K _s, K _hgand K _a;

S2: the maximum concentration that nitrogen oxides in effluent, sulfide, mercury and ash content that chimney 6 discharges are set is n _n0, n _s0, n _hg0and n _a0(unit is mg/m ³), detect in real time flue with the continuous on-line monitoring system of flue gas pollutant and be arranged in the real-time traffic V of the pipeline section flue gas after pollutant control device (unit is m ³/ s), and the real-time concentration n of nitrogen oxide, sulfide, mercury and ash content _n, n _s, n _hgand n _a(unit is mg/m ³), and detect the real-time quality m that carries raw coal on feeder conveyer belt 7 with LOAD CELLS 901 ₇, detect the real-time transfer rate v of feeder conveyer belt 7 with velocity sensor 902 ₇, to calculate the real-time raw coal supply flow rate of feeder conveyer belt 7 (unit is kg/s), wherein, the utility model is preferably arranged on the detection probe of the continuous on-line monitoring system of flue gas pollutant in the flue pipeline section of wet method fume desulfurizing system exit position, with more accurate, the real-time true horizon that reflects pollutant in current power plant emission flue gas;

S3: calculate respectively real-time mud supply flow rate M2 (unit is kg/s) according to five formula of following S3-1 to S3-5, and the minimum of a value of getting is wherein optimum mud supply flow rate in real time:

$M2=\frac{V(n_N-n_{N0})}{(1-\frac{{\mathrm{\η}}_N}{100})\·\frac{N}{100}\·K_N}$ (formula S 3-1)

$M2=\frac{V(n_S-n_{S0})}{(1-\frac{{\mathrm{\η}}_S}{100})\·\frac{S}{100}\·K_S}$ (formula S 3-2)

$M2=\frac{V(n_{\mathrm{Hg}}-n_{\mathrm{Hg}0})}{(1-\frac{{\mathrm{\η}}_{\mathrm{Hg}}}{100})\·\frac{\mathrm{Hg}}{100}\·K_{\mathrm{Hg}}}$ (formula S 3-3)

$M2=\frac{V(n_A-n_{A0})}{(1-\frac{{\mathrm{\η}}_A}{100})\·\frac{A}{100}\·K_A}$ (formula S 3-4)

$M2=\frac{1}{3}M1$ (formula S 3-5)

S4: the real-time mud supply flow rate of optimum that control screw(-type) feeder 9 calculates by step S3 outputs to mud on feeder conveyer belt 7, to make mud that screw(-type) feeder 9 exports all be no more than the maximum concentration that above-mentioned steps S2 sets mixing nitrogen oxide, sulfide, mercury and four kinds of pollutants of ash content of being discharged by chimney 6 in burning process, can not exceed the mark of setting with the discharge that ensures nitrogen oxide, sulfide, mercury and four kinds of pollutants of ash content, and the supply flow rate of mud is no more than 1/3rd of raw coal, to ensure efficiency of combustion; And on this basis, can also reach maximum mud and mix burning amount, realize the optimal production of economic environmental protection.In addition, the maximum concentration of nitrogen oxide, sulfide, mercury and ash content in above-mentioned steps S2 is set as to the existing national standard of corresponding pollutant, the pollutant emission level that can make coal-burning power plant's mud mix burning is no more than national standard.

The utility model does not limit to and above-mentioned detailed description of the invention; according to foregoing; according to ordinary skill knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought of the utility model prerequisite; the utility model can also be made equivalent modifications, replacement or the change of other various ways, all drops among protection domain of the present utility model.

Claims (4)

1. coal-burning power plant's mud is mixed burning system, comprise boiler furnace (1), chimney (6) and be communicated with the flue between boiler furnace (1) and chimney (6), the flue gas producing in described boiler furnace (1) is discharged by chimney (6) by after flue, pollutant control device for removing flue gas pollutant is installed in described flue, it is characterized in that: described mud mix burning system also comprise pulverized coal preparation system, for delivery of the feeder conveyer belt (7) of raw coal with for delivery of the screw(-type) feeder (9) of mud; The discharging opening of described screw(-type) feeder (9) is arranged on the top of feeder conveyer belt (7), feeder conveyer belt (7) is put into raw coal in pulverized coal preparation system together with the mud of screw(-type) feeder (9) output, and described pulverized coal preparation system is blown in described boiler furnace (1) after mud and raw coal are ground into powder.

2. coal-burning power plant according to claim 1 mud is mixed burning system, it is characterized in that: economizer (2) and air preheater (3) are also installed in described flue, described pollutant control device comprises electrostatic precipitator (4) and wet method fume desulfurizing system (5), and described economizer (2), air preheater (3), electrostatic precipitator (4) and wet method fume desulfurizing system (5) are arranged in described flue to the direction of chimney (6) successively by boiler furnace (1).

3. coal-burning power plant according to claim 1 and 2 mud is mixed burning system, it is characterized in that: described screw(-type) feeder (9) is driven by motor, described coal-burning power plant's mud is mixed burning system and is also comprised the controller for controlling described motor speed, and the output of described controller is electrically connected with the control end of motor.

4. coal-burning power plant according to claim 1 and 2 mud is mixed burning system, it is characterized in that: described coal-burning power plant's mud is mixed burning system and also comprised the LOAD CELLS (901) for detection of the upper real-time quality of carrying raw coal of described feeder conveyer belt (7), be arranged in the flue gas real-time traffic of pipeline section and the continuous on-line monitoring system of flue gas pollutant (10) of pollutant real-time concentration after pollutant control device for detection of the velocity sensor (902) of the real-time transfer rate of described feeder conveyer belt (7) and for detection of described flue, described LOAD CELLS (901) and velocity sensor (902) are arranged on respectively on feeder conveyer belt (7), the detection probe of the continuous on-line monitoring system of described flue gas pollutant (10) is arranged on flue and is arranged in pollutant control device pipeline section afterwards.