The modernization of the fuel supply system of the State Enterprise "Zirnensk distillery"

Modernization of the boiler house allowed 75% of natural gas to be replaced with local organic fuel.
The design of the burner allows you to burn natural gas and organic fuel (from 10% -100% gas or 0% -100% organic fuel)

The project provides for the modernization of the fuel supply path of the DKVR-6 ,5-13 boilers with the installation of two MDGG-250 BURNERS on each of the boilers.
The MDGG-250 burner is designed for natural gas combustion. The MDP-250 dust separation and delivery devices are installed in front of the burners. The estimated consumption of a single burner with a nominal heat output of the boiler unit of 4240 kW is:

  • FGP, kg/h -700;
  • Natural gas (20 mbar), n m3/h -175.

For storage of serratiform biological substance, a cost-effective bunker with a capacity of 18 m is provided. The cost bin is made of carbon steel sheet and is mounted on racks in front of the boiler room on the street. A service area is provided for servicing the feed hopper. Theserratiform biological substance is fed from the feed hopper by means of a Noria. The serratiform biological substance is fed from the Noria to the feed bins by gravity through steel pipelines with a nominal passage of 150 mm.

Feed bins are made from carbon steel sheets and are mounted on racks in the boiler room. The capacity of the feed hopper is 3.0 m, which ensures 20-minute operation of the boiler at rated power. Nutritional bunker is equipped with a glass with a deletion level for visual control of the level of serratiform biological substance and serratiform biological substance mesh strainer;

With filling bins with gravity stainless steel pipework nominal bore of 150 mm FGP is supplied to the auger-dispenser which distributes the serratiform biological substance in the burner MGPG-250. Pipelines between the burners and the feed hopper are equipped with an explosive valve, which is designed to relieve excess pressure during explosions of a mixture of the serratiform biological substance air and natural gas in the boiler furnace and / or the serratiform biological substance supply path from the feed hopper to the burner.

The main fuel is the serratiform biological substance with a low calorific value QH = 1879 kcal/m³. Natural gas with the lowest calorific value QH = 8100 kcal/m³ is used as a reserve fuel for the boiler house.

Characteristics of the MDGG-250 burner

№ n/a

Indicator

Remark

Title

Unit of measurement

Numerical value

1

2

3

4

5

1

Installed heat capacity

Megawatt

3,2

 

1.1

Maximum burner boost

%

+20

Of the nominal power

2

The coefficient of the operation regulation

 

 

 

2.1

On natural gas

%

±60,0

Of the nominal power

3

Rated pressure before the burner

 

 

 

3.1

Natural gas

kPa

2,0

 

3.2

Air

kPa

0,6

 

4

Rated air pressure

kPa

4,0…6,0

 

5

Range of vacuum in the boiler furnace

Pa

-20…-100

 

6

Natural gas consumption

 

 

 

6.1

Minimum

m3/h

40,0

On the "lights" of the furnace

6.2

Maximum

m3/h

350,0

Of the nominal power

7

Consumption of

 

 

 

7.1

Minimum

kg/hour

0,0

Only on natural gas

7.2

Maximum

kg/hour

700,0

 

8

Excess air coefficient in the control range

 

1,03…1,17

 

9

Gorenje concentrations in dry combustion products are given in X=1.0 mg/m3

 

 

 

9.1

Carbon monoxide in gas

mg/m3

50/150

 

9.2

Of nitrogen oxides on the gas

mg/m3

120/80

 

10

Length of the torch at the rated power of the gas burner / serratiform biological substance

m

1,2/2,0

 

11

Range of depth of installation of the burner in the embrasure

mm

100…180

 

12

Overall dimensions of the burner

 

 

 

12.1

height

mm

800

 

12.2

length

mm

700

 

12.3

width

mm

600

 

13

Burner weight

kg

40,0

 

14

Compressed air consumption for burner operation

m3/min

0,0…1,5

Depending on the amount of serratiform biological substance burned

Calculated indicators of the gas supply system

The name of the gas consuming equipment

Number of units

Gas consumption, m3/h

Remark

piece of equipment

together

Steam boiler DKVR-6 ,5-13, 6.5 t / h 1.4 MPa with two burners MDGG-250 (WITH PAPP TIR-250) heat capacity 3200 kW connecting gas pressure 20 mbar

2

175

350

Per boiler unit at rated power

2

350

700

To the boiler room at rated power


РАБОЧИЙ ПРОЕКТ

Аксонометрична схема газопроводу

ЗАКЛЮЧЕНИЯ

COMPOSITION OF THE WORKING PROJECT Axonometric diagram of the gas pipeline CONCLUSIONS

Photo


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