SU1490386A1 - Vortex-type pulverized coal burner - Google Patents

Abstract

The invention relates to shipbuilding, in particular to shipboard power plants with a waste-heat boiler. The purpose of the invention is to increase operational reliability. In the reduced load mode of the gas turbine engine 1, the upper and lower parts 14, 15 of the collector and the fuel vaporizer tube 16 are filled with condensate. Then the pump 19 serves fuel, which displaces the condensate and evaporates. Fuel vapors enter the internal cavity 46 of the flue 2, where it is self-igniting. Afterburning fuel vapor in a gas stream and flushing the device with condensate will increase operational reliability. 2 hp f-ly, 9 ill.

Description

Fig, 1

The invention relates to a shipbuilding plant, in particular, to ship power plants with a boiler-type dispenser (KU) equipped with a device for burning liquid fuel with an increase in steam production at partial operating modes of a gas-pipe unit.

The aim of the invention is to increase operational reliability and operational efficiency.

Figure 1 presents the setup; FIG. 2 shows a device for liquefaction; Corpus 3 includes walls 28 and in which, for example, electric welding evaporator tubes 1 are fixed; Into the walls of the upper part 14 of the fuel collector, a branch pipe 30 is welded to fuel water (saturated steam, to

gani fuel, general view; on fig.Z - is densit) and ends 31 evaporative

the device of the upper part of the fuel manifold; figure 4 - corrugated Evaporative tubes, cross section; on fig.Z - the same, longitudinal section; on fig.6 - the same, with figured metal plates; on figl triangular evaporator tubes, cross section; Fig. 8 shows the arrangement of triangular evaporator tubes in the duct; Fig. 9 shows the arrangement of rows (bundles) of evaporator tubes in the duct.

The combined-cycle gas turbine unit (CCGT) contains a gas turbine engine (GTE I, in the gas flue 2 of which the evaporator case 3 of the fuel (IT) and the waste heat boiler (CU) 4 are consistently located, connected by pipelines 5, 6 of saturated and superheated steam from the general consumer of steam ( OSPP) 7 and with a utilization turbo-generator (UTG), including a utilization steam turbine (UFD) 8 with a regulator of 9 steam supply, and a condenser 10, and an electric generator 11, connected to the ship network 12 through a switchboard 13.

The device for burning liquid fuel is made of the upper (fuel) and lower (drain) parts 14, 15 of the fuel manifold, located outside the duct 2 and interconnected by inclined evaporator tubes 16, equipped with perforations evenly distributed along the length (perforated holes j 17. The upper part 14 of the fuel collector is connected to the pump 19 via the flow regulator 18 or the fuel pressure, and via valves 20 and 21 to the booster boiler system (not shown) from the Lower part 15 of the fuel manifold ene drain pipe 22 with a water-cooled

tubes 16, fitted at the entrance with other washers 32 with calibrated holes 33. Evaporative pipes 16 can be discharged; corrugated

20 of them, including depressions 34 and outflow 35. In the evaporating tubes 16, the metal plates 36 are set to their entire length, including the baffle plates 37, located

25 axes of 38 perforated holes. Evaporation tubes 16 can be made triangular with side walls 39 and the bottom horizontal base 40 "The system will assist

The 30th boiler by pipelines 41, 42 of the saturated steam and condensate through the valves 20 and 21 is connected to the upper part 14 of the fuel manifold. And the steam tubes 16 (Fig.9) races

35 are placed in rows (bundles) 43, 44, in them and lower ones, with the upper row of 43 tubes 16 being located above the perforation of 17 tubes 16 of a row row 44 Between the upper part 14 of the fuel

The manifold 40 and the regulator 18 have a valve 45 installed. The flue 2, evaporating tubes 16 and water for a cooling tank of capacity 23 have internal cavities 46, 47 and 48, respectively.

45 The steam and gas installation works as follows.

When GTE 1 is operating at the same power, the fuel supply to the housing 3 is turned off, valves 20, 21 and 45 are closed and the KU steam capacity is sufficient to provide the required power of OSPP 7 and UPT 8 ,, With the upper and lower parts 14, 15 of the fuel collectors and internal bands

55 47 tubes 16 are filled with hot gases from the working. The pressure in the inner cavities 46 and 48 is the same, therefore the outflow of hot gases through the water tank 23 is eliminated

a container 23 provided with a cooler 24. The container 23 is connected by an overflow pipe 25 to the drain tank 26. To the OSIP 7, steam 27 is additionally supplied from an external source, for example from an auxiliary boiler (not shown).

The housing 3 includes walls 28 and 29 in which, for example, electric welding, evaporator tubes 16 are fixed. Into the walls of the upper part 14 of the fuel manifold, a pipe 30 supplying fuel (saturated steam, condensate) and evaporating ends 31 are welded.

tubes 16, provided at the entrance with choke washers 32 with calibrated holes 33. Evaporating tubes 16 can be discharged; corrugated, including hollows 34 and projection 35. In the evaporation tubes 16 along their entire length, shaped metal plates 36 are installed, including baffles flaps 37, located on

axes 38 of perforated holes 17. Evaporating tubes 16 can be made triangular with side walls 39 and a lower horizontal base 40 "The booster boiler system 41, 42 of saturated steam and condensate through valves 20 and 21 communicate with the upper part 14 of the fuel manifold. The evaporator tubes 16 (Fig. 9) are arranged in rows (bundles) 43, 44, upper and lower, with the upper row 43 tubes 16 being located above the perforation 17 of tubes 16 of the horizontal row 44. Between the upper part 14 of the fuel

the manifold and regulator 18 have a valve 45 installed. A gas duct 2, evaporating tubes 16 and water for a cooling tank of capacity 23 have internal cavities 46, 47 and 48, respectively.

The steam and gas unit works as follows.

When the GTE 1 is operating at the same power, the fuel supply to the casing 3 is turned off, valves 20, 21 and 45 are closed and the steam capacity of the CG 4 is sufficient to provide the required power of OSPP 7 and UPT 8 ,, At the same time, the upper and lower parts 14, 15 of the fuel collectors and cavity

47 tubes 16 are filled with hot exhaust gases. The pressure in the inner cavities 46 and 48 is the same, so that the flow of hot gases through the water tank 23 is eliminated.

The container 23 is constantly cooled with seawater through the cooler 24, whereby the temperature of the water in the container 23 is maintained at no more than 30-40 ° C,

At low power modes of the GTE I, when it is necessary to increase the power of the DCF 8, t, e. increase the steam capacity of the KU 4, put the device for burning liquid fuel into operation. Open the valve 21 and fill the upper part 14 of the collector with condensate, which is drained through the openings 33. into the pipe 16 where the water evaporates and the resulting water vapor is expelled emits oxygen-containing gases and fills the upper and lower parts 14, 15 of the collectors and the internal cavity 47 of the tubes 16. Excess condensate is drained into the container 23. Then close the valve 21 and open the valve 45 and pump 19 to supply the fuel to the upper part 14 filled with water. topl willow collector. The fuel in the upper part 14 of the collector displaces water and through the openings 33 enters the pipes 16 for water, where the fuel evaporates and is displaced

steam, fuel vapors fill the internal cavity 47 and through perforated openings I7 are introduced into the internal cavity 46.

In cavity 46 of hot gases with a temperature of about 300 ° C, fuel vapor is self-igniting, as a result of which the temperature of gases entering KU 4 and the output of

When switching to an increased load of the GTE I and the fuel supply is turned off by closing the valve 45 and opening the valve 2. As a result, the water vapors displace the fuel vapors, then close the valve 21. Similarly, the device for burning fuel works when steam is supplied through the valve 20,

Thus, the liquid fuel is initially evaporated and fuel vapor 2 is supplied to the gas duct 2, evenly distributed throughout the gas flow. At the same time, by supplying condensate to the evaporating tubes 16 when the iTon supply device is turned on and off, the contact of the fuel vapor with gases is eliminated. boom in the inner po5

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47 tubes 16 and parts 14, 15 of the fuel manifold. The vapor pressure of the fuel is insignificant, by 50-100 mm along the length, greater than the gas pressure in cavity 46, therefore the length of the flame from the perforated hole 17 is also small. The gas temperature is maintained by the fuel regulator 18 within no more than the nominal mode of the GTE 1, therefore there is no need to use a special furnace in the flue 2 for burning fuel

Claims (3)

Uninterrupted operation of the device at modes with a relative power of the GTE 1 equal to O, 1-O, 15, t-eo at lower gas temperatures at the exit of the GTE 1 is ensured by supplying 10 16% of the total fuel consumption to KU 4 in the lower row of 44 tubes, Moreover, for reliability of operation, light fuel having a lower flash point can be supplied to the bottom row 44, which allows it to be guaranteed. to have a sufficiently high temperature to ensure the evaporation of fuel in the upper range of 43 evaporator tubes 16. All this increases the reliability of GTU and ISU as a whole on reduced loads of GTE 1 "Invention 0 0 five 0 1, A device for burning liquid fuel in a recovery boiler, containing parallel fuel evaporation tubes with outlet openings, a fuel source connected to the inlet of the tubes, characterized in that, in order to increase operational reliability by eliminating the discharge of liquid fuel into the boiler gas duct , the device additionally contains an intermediate g cooled tank and inlet and drain headers located on the inlet and outlet of the evaporative fuel tubes, respectively; the collector is connected to an intermediate cooled tank, and the fuel evaporating tubes are arranged obliquely and equipped with throttle washers, 2, The device according to claim 1, 1 and 2, and the fact that the supply manifold of the fuel evaporating tubes is additionally communicated through the stop valves with the steam or condensate pipe. 0 five 3. The device according to PP "1 and 2, which is characterized by the fact that liquid-shutter plates are located inside the fuel evaporation tubes. -L 28 thirty 33 Fig.Z cpusA ffjus.7 35 54 srig.V J6 28 jiav TMffff / roeГ then / g / gI / ffSffoe taplyooo U9.9