WO2015149572A1

WO2015149572A1 - Energy-conserving boiler

Info

Publication number: WO2015149572A1
Application number: PCT/CN2015/070158
Authority: WO
Inventors: 银龙
Original assignee: 银龙
Priority date: 2014-04-02
Filing date: 2015-01-06
Publication date: 2015-10-08
Also published as: CN104534438A; CN103900067A; CN104534438B; CN204593335U

Abstract

An energy-conserving boiler, comprising: a connected water tank (1), a furnace (2), a first tail smoke passage (3), at least one first coal conserver (4), a second tail smoke passage (6), at least one evaporation and heat receptor (7), a second coal conserver (8), a steam drum (12), a steam separating tank (14), a condenser (16), and a hotwell (17). The second tail smoke passage (6) is disposed at the end of the first tail smoke passage (3) and runs in parallel to the first tail smoke passage (3). The at least one evaporation and heat receptor (7) is disposed inside of the second tail smoke passage (6). The second coal conserver (8) is disposed at the bottom part of the at least one evaporation and heat receptor (7). The water inlet of the at least one evaporation and heat receptor (7) is in communication with the water outlet at the bottom of the steam drum (12). The steam outlet of the at least one evaporation and heat receptor (7) is in communication with the steam inlet at the top of the steam drum (12). The water inlet of the second coal conserver (8) is in communication with the water outlet of the hotwell (17). The water outlet of the second coal conserver (8) is in communication with the water inlet at the top of the steam drum (12). The steam opening at the top of the steam drum (12) is in communication with the steam inlet of a superheater (10). The superheater (10) is installed in the first tail smoke passage (3) and/or the second tail smoke passage (6). The steam outlet of the superheater (10) is in communication in sequence with the steam separating tank (14) and the condenser (16). The water outlet of the condenser (16) is in communication with the hotwell (17). The boiler is suited both for steam and water.

Description

Energy-saving boiler

Technical field

The invention relates to an energy-saving boiler which provides power by "one furnace and two pots". It uses the heat energy of boiler combustion to generate hot water while generating superheated steam, and converts thermal energy into mechanical energy through superheated steam driving equipment to power and recycle the boiler. Waste heat.

Background technique

Usually, a hot water boiler produces only one type of hot water. The auxiliary power of the hot water boiler is all from the externally supplied power. If it is considered to directly burn the heat of the boiler, another system (superheated steam generation system) is added, and then the steam is used to push the equipment. Boiler auxiliary equipment, and recycling steam to promote the waste heat of the equipment, not only reduce the dependence on purchased power, but also improve the energy conversion efficiency, reduce the dependence on purchased power, reduce the production cost of the enterprise, the present invention is specifically proposed.

Summary of the invention

The object of the present invention is to realize the power supply for the combustion of the boiler with higher energy conversion efficiency by using a newly added system (superheated steam generation system) on the basis of the original boiler, and realize the shift regulation of the auxiliary machine. Recycle waste heat. That is, the present application provides an energy-saving boiler that provides power by "one furnace and two pots".

In order to accomplish the object of the present invention, the present invention adopts the following technical solutions:

An energy-saving boiler of the present invention comprises: a water distribution tank, a furnace, a first tail flue and a plurality of first economizers, the first tail flue is located at the end of the furnace, the furnace is connected to the water tank, and several are connected in series The first economizer is installed in the first tail flue, and the upper end of the water tank is connected with a plurality of first economizer inlet ends connected in series, and the outlet ends of the plurality of first economizers connected in series are connected to In the heat network, wherein: the energy-saving boiler further comprises: a second tail flue, a superheated steam generating system (a plurality of evaporative heaters, a second economizer, a steam drum, a sub-cylinder), a condenser and a hot well, and a second tail smoke The channel is installed at the end of the first tail flue, running in parallel with the first tail flue, a plurality of evaporative heat sinks are installed in the second tail flue, and a second economizer is installed in the lower part of the evaporative heat sinks, and some evaporating The water inlet of the heat receiver is connected with the water outlet of the lower end of the steam drum, and the steam outlets of the plurality of evaporative heat exchangers are connected with the steam inlets at the upper end of the steam drum; the water inlet of the second economizer is connected to the hot water outlet of the hot water pump by the feed water pump. Second economizer The water outlet is connected to the water inlet of the upper end of the steam drum, and the steam port at the upper end of the steam drum is connected to the steam inlet of the superheater; the superheater is installed in the first tail flue and/or the second tail flue, and the superheater outlet and the sub-port One end of the cylinder is connected, and the remaining steam at the other end of the cylinder is connected to the inlet of the condenser through a pipeline, and the outlet of the condenser is connected with the hot well, and the heat exchanger tube is arranged in the condenser, and the water inlet and the furnace of the heat exchange tube The heat network is connected to the water back, and the water outlet of the heat exchange tube is connected to the water tank;

An energy-saving boiler of the present invention, the sub-cylinder comprises: a plurality of small steam turbines juxtaposed together, and the remaining steam of the small steam turbine is connected to the inlet of the condenser through a pipeline;

An energy-saving boiler according to the present invention, wherein: the lower end of the hot well is further provided with a water supply valve and a make-up water pump;

An energy-saving boiler according to the present invention, wherein: a regulating valve is further disposed between the divided cylinder and the condenser, and an intake valve is installed between the superheater and the divided cylinder;

An energy-saving boiler according to the present invention, wherein: an inlet valve is further disposed between the economizer and the hot well;

An energy-saving boiler according to the present invention, wherein: the first tail flue is provided with a first regulating baffle; and the second tail flue is provided with a second regulating baffle;

An energy-saving boiler of the present invention, wherein: the feed water pump is two;

An energy-saving boiler according to the present invention, wherein: the number of the make-up water pumps is two.

The energy-saving boiler of the present invention has the following advantages compared with the original boiler:

1. Add a tail bypass flue at the rear of the original boiler tail flue (or use another method to burn heat), run in parallel with the original boiler tail flue, and set up an economizer in the new flue. The three-stage evaporator, superheater and steam drum, the steam generated as the power source of the rotating equipment, the end of the new tail flue is equipped with a regulating baffle and the end of the original flue is equipped with an adjusting baffle to control the two flue The baffle opening degree is used to adjust the amount of splitter flue gas, control steam system load, steam temperature and steam pressure.

2. The newly added superheated steam circulation system is an independent system. The hydrating water is selected as softening water, and the supplementary water pump is used to replenish water into the hot well. The generated steam is collected into a sub-cylinder and sent to several steam turbines for work-driven rotating equipment. The remaining steam after completion of the work is collected into the condenser to cool the heat recovery and recover the waste heat to the boiler hot water system. The condensed water is recovered as superheated steam. The circulation system feeds water, and two feed water pumps are set to drive the condensed water in the hot well into the steam drum through the economizer for use in the boiler. The cooling water of the condenser is introduced into the heat network after being introduced into the water by the return water of the furnace heat network, and then heated by the header tank and the first-stage evaporator.

3. The invention adopts the DCS centralized control system to set the steam boiler load regulation, the drum water level adjustment, the water compensation adjustment and the modified steam motion control to automatic control, thereby reducing the manual adjustment amount.

4. The invention adopts the existing hot water boiler as a steam and water dual-purpose boiler, and uses the superheated steam generated by the boiler to push the auxiliary equipment of the boiler (send blower, feed water pump, heat network circulation pump, etc.), and recycle steam to promote The residual heat of the equipment.

DRAWINGS

Figure 1 is a schematic view of a boiler of the present invention.

In Fig. 1, reference numeral 1 is a water tank; numeral 2 is a furnace; numeral 3 is a first tail flue; numeral 4 is a first economizer; numeral 5 is a first regulating baffle; and numeral 6 is a second tail flue. Lane; reference numeral 7 is an evaporation heater; No. 8 is a second economizer; numeral 9 is a second regulating baffle; numeral 10 is a superheater; numeral 11 is an intake valve; numeral 12 is a steam drum; 13 is a small steam turbine; and 14 is a sub-cylinder; 15 is a regulating valve; numeral 16 is a condenser; numeral 17 is a hot well; numeral 18 is a water inlet valve; numeral 19 is a feed water pump; numeral 20 is a water supply valve; numeral 21 is a makeup water pump; and numeral 22 is a heat exchange tube.

detailed description

As shown in FIG. 1, the energy-saving boiler of the present invention comprises: a water tank 1, a furnace 2, a first tail flue 3, a plurality of first economizers 4, a second tail flue 6, a plurality of evaporative heaters 7, and a second province. Coaler 8, steam drum 12, sub-cylinder 14, condenser 16 and hot well 17.

The first tail flue 3 is located at the end of the furnace 2, the furnace 2 is connected to the water tank 1, and a plurality of first economizers 4 connected in series are installed in the first tail flue 3, and the upper end of the water tank 1 is connected in series A plurality of first economizers 4 are connected together at the water inlet end, and the outlet ends of the plurality of first economizers 4 connected in series are connected to the heat network. The second tail flue 6 is mounted at the end of the first tail flue 3, running in parallel with the first tail flue 3, and in the second tail flue 6 is mounted a plurality of evaporative heat sinks 7 in the plurality of evaporative heat sinks 7 The lower portion is equipped with a second economizer 8, and the water inlets of the plurality of evaporative heaters 7 are connected to the water outlets at the lower end of the steam drum 12, and the steam outlets of the plurality of evaporative heat receivers 7 are connected to the steam inlets at the upper end of the steam drum 12. The water inlet of the second economizer 8 is connected to the water outlet of the hot well 17 through the feed water pump 19 and the inlet valve 18, and the water outlet of the second economizer 8 is connected to the water inlet of the upper end of the steam drum 12, and the upper end of the steam drum 12 The steam port is connected to the steam inlet of the superheater 10; the superheater 10 is installed in the first tail flue 3 and/or the second tail flue 6, and the steam outlet of the superheater 10 passes through the intake valve 11 and one end of the sub-cylinder 14 Connected, a regulating valve 15 is also installed between the cylinder 14 and the condenser 16. The sub-cylinder 14 includes a plurality of small steam turbines 13 juxtaposed together, and the steam remaining in the small steam turbine 13 is connected to the inlet port of the condenser 16 through a pipe. The water outlet of the condenser 16 is connected to the hot well 17, and the condenser 16 is provided with a heat exchange tube 22, and the water inlet of the heat exchange tube 22 is connected to the return water of the furnace heat network, and the water outlet of the heat exchange tube 22 is connected to the water tank 1.

A regulating valve 15 is also installed between the cylinder 14 and the condenser 16. The first tail flute 3 is provided with a first regulating baffle 5; the second tail flue 6 is provided with a second regulating baffle 9 for adjusting the amount of smoke in the tail flue. There are two feed pumps 19 and make-up pumps for mutual backup.

The invention provides a purpose of supplying steam to the outside by installing parallel tail passages on the flue of the boiler tail, and arranging the evaporating heat receiver 7 and the second economizer 8 therein; the generated steam is supplied to the sub-cylinders 14, The small steam turbine 13 is promoted to work as a steam source for other users; the small steam turbine 13 can also drive the small asynchronous generator to generate electricity for use in the factory; the remaining steam after the small steam turbine 13 works is passed through the condenser 16 and the furnace. After the heat network returns to the water for heat exchange, the furnace heat network returns to the water tank 1, and the condensed water enters the second economizer 8 through the hot well 17, and the second economizer 8 placed in the second tail flue 6 After reheating, enter the steam drum 12, the water in the drum 12 After being heated again by a plurality of evaporative heaters 7, the steam which is heated from the evaporative heat receiver 7 is sent to the small steam turbine 13 via the steam drum 12 and the superheater 10 for external work.

At the beginning of the operation of the boiler, the hot well 17 has no water. At this time, the soft water can be added from the outside to the hot well 17 through the water supply valve 20 and the make-up water pump 21. Of course, in the case where the amount of water in the hot well 17 is insufficient, The water replenishing valve 20 and the makeup water pump 21 can be opened to add demineralized water from the outside to the hot well 17.

There are drain valves at the bottom of the first economizer 4 and the second economizer 8, and there are drain valves at the bottom of the evaporative heat sink 7, the hot well 17, the superheater 10, and the condenser 16. For the sake of simplicity, the drawings are not drawn. Out.

Industrial applicability

The energy-saving boiler of the invention adopts the existing hot water boiler into a boiler for steam and water, and uses the superheated steam generated by the boiler to push the auxiliary equipment of the boiler (sending fan, feed water pump, heat circulation pump, etc.) and recovering steam. Pushing equipment with industrial applicability.

The above description is illustrative of the invention and is not to be construed as limiting the scope of the invention, and the scope of the invention is defined by the scope of the invention, and the invention may be modified in any form without departing from the spirit of the invention.

Claims

An energy-saving boiler comprising: a water tank (1), a furnace (2), a first tail flue (3) and a plurality of first economizers (4), the first tail flue (3) being located in the furnace (2) At the end of the furnace, the furnace (2) is connected to the header tank (1), and a plurality of first economizers (4) connected in series are installed in the first tail flue (3) at the upper end of the header tank (1) A plurality of first economizers (4) connected in series are connected to the water inlet end, and the water outlets of the plurality of first economizers (4) connected in series are connected to the heat network, wherein the energy-saving boiler further comprises: a second tail flue (6), a plurality of evaporative heat receivers (7), a second economizer (8), a steam drum (12), a sub-cylinder (14), a condenser (16), and a hot well (17), The second tail flue (6) is mounted at the end of the first tail flue (3), running in parallel with the first tail flue (3), and a plurality of evaporative heat sinks are installed in the second tail flue (6) ( 7), a second economizer (8) is installed in a lower portion of the plurality of evaporative heat receivers (7), and the water inlets of the plurality of evaporative heat receivers (7) are connected to the water outlets at the lower end of the steam drum (12), and a plurality of evaporative heat receivers The outlet of (7) is connected to the inlet of the upper end of the steam drum (12); the second economizer ( 8) The water inlet is connected to the hot water outlet of the hot well (17) through the feed water pump (19), and the water outlet of the second economizer (8) is connected to the water inlet of the upper end of the steam drum (12), and the upper end of the steam drum (12) The steam port is connected to the inlet of the superheater (10); the superheater (10) is installed in the first tail flue (3) and/or the second tail flue (6), and the superheater (10) outlet Connected to one end of the sub-cylinder (14), the remaining steam at the other end of the sub-cylinder (14) is connected to the inlet of the condenser (16) through a pipe, and the outlet of the condenser (16) is connected to the hot well (17). The condenser (16) is provided with a heat exchange tube (22), and the water inlet of the heat exchange tube (22) is connected with the return water of the furnace heat network, and the water outlet of the heat exchange tube (22) is connected with the water tank (1).
An energy-saving boiler according to claim 1, wherein said sub-cylinder (14) comprises: a plurality of small steam turbines (13) juxtaposed together, and the remaining steam of the small steam turbine (13) passes through the pipeline and condenses The inlet of the device (16) is connected.
An energy-saving boiler according to claim 2, characterized in that the lower end of the hot well (17) is further provided with a makeup valve (20) and a make-up water pump (21).
An energy-saving boiler according to claim 3, characterized in that a regulating valve (15) is further arranged between the partial cylinder (14) and the condenser (16), in the superheater (10) and the sub-cylinder ( 14) An intake valve (11) is installed between them.
An energy-saving boiler according to claim 4, characterized in that a water inlet valve (18) is further arranged between the second economizer (8) and the hot well (17).
An energy-saving boiler according to claim 5, wherein said first tail flue (3) is provided with a first regulating baffle (5); and the second tail flue (6) is provided with a second adjusting Baffle (9).
An energy-saving boiler according to claim 6, wherein said feed water pump (19) is two.
An energy-saving boiler according to claim 6, characterized in that the number of the make-up water pumps (21) is two.