CN219976367U - Steam boiler heating device - Google Patents

Abstract

The utility model discloses a heating device of a steam boiler, which comprises the steam boiler, a dryer and a falling film absorber, wherein the dryer is provided with a cavity, a feed inlet, a smoke inlet, a discharge outlet and a smoke outlet, the feed inlet is suitable for introducing fuel so that the fuel flows into the cavity, the smoke inlet is communicated with the steam boiler, the discharge outlet is communicated with the steam boiler so that the fuel dried by the dryer flows into the steam boiler, the falling film absorber comprises an air inlet, a water inlet and a water outlet, the air inlet is communicated with the smoke outlet of the dryer so that the smoke flowing out of the dryer flows into the falling film absorber through the air inlet, the water inlet is suitable for introducing boiler water, and the water outlet is communicated with the steam boiler. The steam boiler heating device has the advantages of simple structure, low cost and the like.

Description

Steam boiler heating device

Technical Field

The utility model relates to the field of steam boilers, in particular to a heating device of a steam boiler.

Background

The industrial steam boiler is a heating device releasing heat, is absorbed by a water cooling wall through radiation heat transfer, and the water of the water cooling wall boils and vaporizes to generate a large amount of steam which enters a steam drum to be subjected to steam-water separation, and the separated saturated steam reaches the required working temperature and pressure, so that the industrial steam boiler is widely applied to the industries such as heat supply industry, chemical industry, food processing, medical industry, pharmaceutical industry, canning industry and the like.

In the related art, the industrial steam boiler has large heat loss and low heat recovery efficiency.

Disclosure of Invention

The present utility model has been made based on the findings and knowledge of the inventors regarding the following facts and problems:

in the related art, certain fuels have high water content, such as biomass, solid waste and the like, and are required to be dried before being combusted, and meanwhile, a great amount of energy is lost in the energy supply process of the fuels, so that the thermal efficiency of the boiler body is reduced. The energy loss comprises smoke discharging heat loss, pollution discharging heat loss, backwater heat loss and exhaust steam heat loss, wherein the smoke discharging heat loss accounts for about 90% of the total loss, is directly emptied smoke generated by the environmental protection treatment of the boiler body, and contains a large amount of water vapor after drying fuel such as biomass; the pollution discharge heat loss is due to pollution discharge measures carried out when the boiler body is used for adjusting water quality balance or frequently adjusting load to avoid load change of users, and the temperature of the discharged hot water is up to 100 ℃; the backwater heat loss is the heat loss generated when the backwater of the primary pipe network with higher temperature is not utilized. For recycling heat loss of the biomass boiler body and drying biomass materials, a corresponding energy-saving and environment-friendly device can be arranged, material drying equipment is added on the basis of the energy-saving and environment-friendly device of the industrial steam boiler body, high-temperature dry flue gas discharged by a flue of the boiler body is introduced into the material drying equipment, the flue gas exchanges heat with fuel, the flue gas is dried, and the dried fuel enters the boiler body again to burn to generate steam energy. The energy-saving and environment-friendly device can achieve the purposes of recovering waste heat and water in smoke exhaust, heating boiler water supply, drying fuel and energy storage.

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the utility model provides the steam boiler heating device which has the advantages of simple structure, low cost and high heat recovery efficiency.

According to an embodiment of the utility model, a steam boiler heating device comprises: a steam boiler; one end of the thermal network pipe is communicated with the steam boiler so that steam generated by the steam boiler flows into the thermal network pipe to enable the thermal network pipe to supply heat to a user; a fuel bin adapted to store fuel; a dryer having a chamber, a feed inlet, a smoke inlet, a discharge outlet and a smoke outlet, wherein the feed inlet, the smoke inlet, the discharge outlet and the smoke outlet are all communicated with the chamber, the feed inlet is communicated with the fuel bin so that fuel flowing out from the fuel bin flows into the chamber, the smoke inlet is communicated with the steam boiler so that flue gas in the steam boiler flows into the chamber to dry and heat the fuel, and the discharge outlet is communicated with the steam boiler so that the fuel dried by the dryer flows into the steam boiler; the falling film absorber comprises an air inlet, a water inlet and a water outlet, wherein the air inlet is communicated with a smoke outlet of the dryer so that smoke flowing out of the dryer flows into the falling film absorber through the air inlet, the water inlet is suitable for being filled with boiler feed water so that the boiler feed water and the smoke exchange heat in the falling film absorber to raise the temperature of the boiler feed water, and the water outlet is communicated with the steam boiler so that the boiler feed water heated by the falling film absorber flows into the steam boiler.

The steam boiler heating device provided by the embodiment of the utility model is provided with the steam boiler, the dryer and the falling film absorber, and utilizes the heat of the flue gas to dry the fuel and heat the water supply of the boiler, thereby effectively recovering the heat energy of the flue gas in the steam boiler and improving the heat efficiency of the boiler

In some embodiments, the falling film absorber comprises: a housing, the air inlet being formed on the housing and being disposed adjacent to a bottom of the housing so that flue gas in the steam boiler flows into the housing; the first pipe is arranged in the shell, the water inlet is formed at one end of the first pipe, and the water outlet is formed at the other end of the first pipe; the second pipe, the second pipe is established in the casing and be located the top of first pipe, the second pipe is followed the length direction of casing extends, the second pipe is equipped with a plurality of openings first spray mouths down, a plurality of first spray mouths are followed the extending direction of second pipe extends, be suitable for in the second pipe and let in the reaction liquid, so that the reaction liquid sprays through first spray mouths on the outer peripheral surface of first pipe, the reaction liquid absorbs the heat and the moisture of flue gas in the casing are in order to heat boiler feedwater in the first pipe.

In some embodiments, the shell comprises a first shell and a second shell which are sequentially arranged along the up-down direction, the first shell is provided with a first cavity, the second shell is provided with a second cavity, the first cavity and the second cavity are mutually independent along the up-down direction, the first cavity comprises a first section and a second section which are sequentially communicated along the up-down direction, the second pipe and the first pipe are arranged in the first section, the second section is used for storing reaction liquid flowing out through the second pipe, the air inlet is arranged on the second shell and is communicated with the second cavity, the air inlet is arranged adjacent to the bottom of the second cavity, the falling film absorber further comprises a plurality of one-way valves and third spray pipes which are arranged in the second cavity and are adjacent to the top of the second cavity, a plurality of second spray openings are arranged on the third pipe, the second openings are arranged along the extending direction of the third pipe, the boiler is arranged in the first section, the second pipe is communicated with the second spray pipes, the second spray openings are communicated with the second boiler through the second spray valves, and the second spray pipes are arranged in the first spray pipes, the second spray openings are communicated with the second spray pipes, and the water is conveniently supplied to the first spray pipes, the second spray openings are communicated with the flue gas through the second spray valves, and the second spray openings are communicated with the first spray openings, and the second spray openings are conveniently communicated with the water through the first spray openings.

In some embodiments, the housing further has an air outlet formed at the top of the housing and in communication with the first chamber such that the flue gas is exhausted through the air outlet, and a gas-liquid separation device disposed within the air outlet to separate liquid in the flue gas flowing out through the air outlet.

In some embodiments, the steam boiler heating apparatus further comprises: a flash vessel in communication with the steam boiler for flashing water exiting the steam boiler into steam; the heat accumulator is communicated with the steam boiler and the flash evaporator at one end of the heat accumulator respectively, so that steam flowing out of the flash evaporator and steam flowing out of the steam boiler flow into the heat accumulator to enable the steam flowing out of the steam boiler to heat the steam flowing out of the flash evaporator through the heat accumulator; the generator is communicated with the other end of the heat accumulator so that steam flowing out of the heat accumulator flows into the generator, the generator is communicated with one end of the falling film absorber so that steam in the generator heats the reaction liquid flowing out of the falling film absorber to concentrate the reaction liquid, and the generator is communicated with the other end of the falling film absorber so that the reaction liquid concentrated by the generator flows into the falling film absorber.

In some embodiments, the steam boiler heating apparatus further comprises a heat exchanger having a first passage and a second passage which are independent of each other and can perform heat exchange, both ends of the first passage are respectively communicated with the steam boiler and the water outlet so that water in the falling film absorber flows into the steam boiler through the first passage, and the second passage is communicated with the generator so that secondary steam flowing out through the generator heats water in the first passage through the second passage.

In some embodiments, the generator is in communication with the water inlet such that water flowing out through the generator flows into the falling film absorber.

In some embodiments, the steam boiler heat supply apparatus further includes a transfer box having a third passage and a fourth passage which are independent of each other and can perform heat exchange, both ends of the third passage are respectively communicated with one end of the falling film absorber and the generator, so that the reaction liquid flowing out through the falling film absorber flows into the generator through the third passage, the fourth passage is communicated with the generator, so that the reaction liquid in the third passage is heated through the fourth passage by the reaction flowing out through the generator, and the fourth passage is communicated with the other end of the falling film absorber, so that the reaction liquid flowing out through the fourth passage flows into the falling film absorber.

In some embodiments, the steam boiler heating apparatus further comprises a water treater in communication with the steam boiler and the flash vessel, respectively, such that liquid flowing out through the steam boiler flows into the flash vessel through the water treater.

In some embodiments, the other end of the thermal network management is in communication with the water treatment device such that water flowing out through the thermal network management flows into the water treatment device.

Drawings

Fig. 1 is a schematic structural view of a heating apparatus for a steam boiler according to an embodiment of the present utility model.

Fig. 2 is a schematic structural view of a falling film absorber of a heating apparatus of a steam boiler according to an embodiment of the present utility model.

Reference numerals:

a steam boiler heating device 100;

a dryer 1;

a falling film absorber 2; an air inlet 21; a water inlet 22; a water outlet 23; a housing 24; a first case 241; a first segment 2411; a second segment 2412; a second case 242; a first tube 25; a second tube 26; a third tube 27; an air outlet 28; a first liquid outlet 29; a second liquid outlet 20; a one-way valve 201;

a flash evaporator 3; a heat accumulator 4; a generator 5; a heat exchanger 6; a transfer box 7; a water treatment device 8; heating backwater 9; boiler feed water 10; a steam boiler 101; a fuel silo 102.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A steam boiler heating device according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

As shown in fig. 1-2, a steam boiler heating apparatus 100 according to an embodiment of the present utility model includes a steam boiler 101, a dryer 1, a falling film absorber 2, a thermodynamic network pipe (not shown in the drawings), and a fuel tank 102.

One end of the thermal network pipe is communicated with the steam boiler 101, so that steam generated by the steam boiler 101 flows into the thermal network pipe to enable the thermal network pipe to supply heat to a user. Specifically, the inlet of the thermal network pipe is communicated with the outlet of the steam boiler 101, so that high-temperature steam generated by the steam boiler 101 flows into the thermal network pipe, and thus the high-temperature steam supplies heat to a user through the thermal network pipe.

The fuel silo 102 is adapted to hold fuel. The dryer 1 has a chamber, a feed inlet, a smoke inlet, a discharge outlet and a smoke outlet, the feed inlet, the smoke inlet, the discharge outlet and the smoke outlet are all communicated with the chamber, the feed inlet is communicated with the fuel bin 102 so that fuel flows into the chamber, the smoke inlet is communicated with the steam boiler 101 so that flue gas in the steam boiler 101 flows into the chamber so that the flue gas dries and heats the fuel, and the discharge outlet is communicated with the steam boiler 101 so that the fuel dried by the dryer 1 flows into the steam boiler 101. Specifically, as shown in fig. 1, the feed inlet is communicated with the outlet of the fuel bin 102, so that the fuel in the fuel bin 102 flows into the dryer 1, the smoke inlet is communicated with the air outlet of the steam boiler 101, so that the smoke generated in the steam boiler 101 flows into the dryer 1, the smoke directly heats the fuel to dry the fuel to reduce the water content in the fuel, the discharge outlet is communicated with the inlet of the steam boiler 101, and the dried material flows into the steam boiler 101 to be fully combusted in the steam boiler 101.

The falling film absorber 2 comprises an air inlet 21, an air inlet 22 and an air outlet 23, wherein the air outlet of the dryer 1 is communicated with the air inlet 21 of the falling film absorber 2, so that the flue gas flowing out of the dryer 1 flows into the falling film absorber 2 through the air inlet 21, the air inlet 22 of the falling film absorber 2 is suitable for being filled with boiler feed water 10, so that the boiler feed water 10 and the flue gas exchange heat in the falling film absorber 2 to raise the temperature of the boiler feed water 10, and the air outlet 23 is communicated with the steam boiler 101, so that the boiler feed water 10 heated by the falling film absorber 2 flows into the steam boiler 101. Specifically, as shown in fig. 1, the smoke inlet of the dryer 1 is communicated with the air inlet 21 of the falling film absorber 2, the smoke in the dryer 1 flows into the falling film absorber 2, the boiler feed water 10 can flow into the falling film absorber 2 through the water inlet 22 of the falling film absorber 2, so that the boiler feed water 10 can be heated in the falling film absorber 2 through the smoke, the water outlet 23 of the falling film absorber 2 is communicated with the inlet of the steam boiler 101, and the boiler feed water 10 heated by the falling film absorber 2 flows into the steam boiler 101.

According to the steam boiler heat supply device 100 provided by the embodiment of the utility model, the steam boiler 101, the dryer 1 and the falling film absorber 2 are arranged, and the heat of the flue gas is utilized to dry fuel and heat the boiler water supply 10, so that the heat energy of the flue gas in the steam boiler 101 is effectively recovered, and the heat efficiency of the boiler is improved.

In some embodiments, falling film absorber 2 includes a housing 24, a first tube 25, and a second tube 26.

The air inlet 21 of the falling film absorber 2 is formed on the housing 24 and is arranged adjacent to the bottom of the housing 24 so that flue gas in the steam boiler 101 flows into the housing 24. Specifically, as shown in fig. 1, the inner peripheral contour of the housing 24 is substantially rectangular parallelepiped or cylindrical, and the air inlet 21 of the falling film absorber 2 is disposed adjacent to the bottom of the housing 24, so that the flue gas in the steam boiler 101 can flow into the housing 24 through the bottom of the housing 24.

The first pipe 25 is provided in the housing 24, the water inlet 22 is formed at one end of the first pipe 25, and the water outlet 23 is formed at the other end of the first pipe 25. Specifically, as shown in fig. 1, the first tube 25 is a falling film tube and is disposed in the housing 24 in an S-shape, two ends of the first tube 25 respectively extend out of the housing 24, a tube orifice at an upper end of the first tube 25 is a water inlet 22 of the falling film absorber 2, and a tube orifice at a lower end of the first tube 25 is a water outlet 23 of the falling film absorber 2.

The second pipe 26 is arranged in the shell 24 and is positioned above the first pipe 25, the second pipe 26 extends along the length direction (left-right direction shown in fig. 2) of the shell 24, the second pipe 26 is provided with a plurality of first spraying ports with downward openings, the plurality of first spraying ports extend along the extending direction of the second pipe 26, the second pipe 26 is internally provided with a reaction liquid, so that the reaction liquid is sprayed on the peripheral surface of the first pipe 25 through the first spraying ports, and the reaction liquid absorbs heat and moisture of flue gas in the shell 24 to heat the boiler feed water 10 in the first pipe 25. Specifically, as shown in fig. 1-2, the second pipe 26 is a spray pipe, the second pipe 26 is disposed in the housing 24 and extends in the left-right direction, the second pipe 26 is disposed above the first pipe 25 and is disposed at intervals along the up-down direction with the first pipe 25, a plurality of first spray openings are disposed below the second pipe 26, the first spray openings are sequentially disposed at intervals along the left-right direction, the right end of the second pipe 26 extends out of the housing 24, the liquid inlet is formed at the right end of the second pipe 26, the reaction liquid flowing out of the generator 5 is sprayed on the first pipe 25 through the first spray openings and forms a film on the first pipe 25 to adsorb heat and moisture in flue gas in the housing 24 and transfer the heat and moisture into the first pipe 25 to heat the water in the first pipe 25.

In some embodiments, the housing 24 includes a first housing 241 and a second housing 242 disposed sequentially in an up-down direction, the first housing 241 having a first cavity, the second housing 242 having a second cavity, the first cavity and the second cavity being independent of each other in the up-down direction, the first cavity including a first segment 2411 and a second segment 2412 in sequential communication in the up-down direction, the second tube 26 and the first tube 25 being disposed within the first segment 2411, the second segment 2412 for storing the reaction liquid flowing out through the second tube 26, the air inlet 21 being disposed on the second housing 242 and in communication with the second cavity, the air inlet 21 being disposed adjacent to a bottom of the second cavity, specifically, as shown in fig. 1-2, the first housing 241 being disposed above the second housing 242, and the first housing 241 and the second housing 242 being independent of each other such that the first cavity and the second cavity are not in communication with each other, the first cavity 241 and the second segment 2412 being in communication in the up-down direction, the first segment 2411 and the second segment 2412 being disposed in the mounting segment 2411 and the second tube 24126 being disposed in the second segment 2412 for storing the liquid flowing out through the first tube 25.

In some embodiments, the falling film absorber 2 further comprises a plurality of one-way valves 201 and a third tube 27 extending along the width direction of the housing 24, the third tube 27 being disposed within and adjacent to the top of the second chamber, the third tube 27 being provided with a plurality of second spray ports extending along the extending direction of the third tube 27, the third tube 27 being adapted to pass into the boiler feed water 10 such that the boiler feed water 10 is sprayed within the second chamber through the second spray ports to cause the boiler feed water 10 to absorb impurities in the flue gas. As shown in fig. 1-2, the third pipe 27 is a spray pipe, the third pipe 27 is disposed in the second cavity and extends along the left-right direction, the third pipe 27 is disposed adjacent to the top of the second cavity, the third pipe 27 is provided with a plurality of second spray openings, the plurality of second spray openings are disposed at intervals along the left-right direction, the air inlet 21 is communicated with the second cavity and is disposed adjacent to the bottom of the second cavity, so that flue gas flowing out of the steam boiler 101 flows into the second cavity through the air inlet 21 to be sprayed through the third pipe 27.

In some embodiments, a plurality of one-way valves 201 are provided at the bottom of the first shell 241 and in communication with the second shell 242, or a plurality of one-way valves 201 are provided at the top of the second shell 242 and in communication with the first shell 241, such that flue gas in the second chamber flows into the second segment 2412 through the one-way valves 201. As shown in fig. 1-2, the check valve 201 is a gas check valve 201, and the check valves 201 may be multiple, and the check valves 201 are arranged at the bottom of the first cavity at intervals and are communicated with the second cavity, or the check valves 201 are arranged at the top of the second cavity and are communicated with the first cavity, so that the internal flue gas in the second cavity flows into the first cavity through the gas check valve 201, and the reaction solution in the first cavity cannot flow into the second cavity.

In some embodiments, second housing 242 is provided with second outlet 20 and first outlet 29, first outlet 29 being disposed adjacent the bottom of first housing 241 and in communication with second section 2412, and second outlet 20 being disposed adjacent the bottom of second housing 242 and in communication with the second chamber. Thus, the reaction liquid in the first shell 241 can flow out of the first shell 241 through the first liquid outlet 29, and the water in the second shell 242 can flow out of the second shell 242 from the second liquid outlet 20.

In some embodiments, the first tube 25, the second tube 26, the third tube 27 and the check valve 201 are all plural, the plural first tubes 25, the plural second tubes 26 and the plural third tubes 27 are all disposed at intervals in the front-rear direction, and the plural second tubes 26 are disposed at intervals in the up-down direction in one-to-one correspondence, the plural check valves 201 are disposed at intervals in the front-rear direction in plural rows, and each row of check valves 201 includes a plurality of check valves 201 disposed at intervals in the left-right direction. Thereby making the falling film absorbent assembly 2 more rational.

The operation of the falling film absorber 2 for the steam boiler heating apparatus 100 according to the embodiment of the present utility model will be described in detail.

First-stage absorption: because the flue gas generated after the fuel is combusted contains vapor, sulfur dioxide, particulate matters and the like, the flue gas enters the second cavity through the air inlet 21, meanwhile, liquid is sprayed in the second cavity in a mist or drop shape from the third pipe 27, the liquid is sprayed from top to bottom, and the flue gas flows from bottom to top, so that the flue gas and the liquid are in direct reverse contact, and the first-stage absorption is completed. The process mainly comprises the steps of absorbing sulfur dioxide, particulate matters and part of sensible heat in the flue gas by liquid, wherein the flue gas almost has no sulfur dioxide and particulate matters, mainly contains a large amount of water vapor, and enters a second stage for absorption. Note that the liquid may be elemental water as boiler feed water 10, process water or domestic water, or alkali liquor, as the case may be.

Second stage absorption: the flue gas enters the second section 2412 through the one-way valve 201 to start the second stage absorption, the process mainly comprises primary absorption of water vapor in the flue gas, and the liquid in the second section 2412 is redundant reaction liquid sprayed on the first pipe 25 through the second pipe 26, and the reaction liquid is a dilute solution formed after deep absorption of the water vapor in the flue gas. The second segment 2412 can also provide buffer space for circulation of liquid within the falling film absorber 2.

Since the reaction liquid in the second stage 2412 becomes low concentration by absorbing the water vapor in the flue gas, the absorption effect of the reaction liquid of a dilute concentration in the second stage 2412 is weaker than that of the reaction liquid of a concentrated concentration on the first pipe 25, and thus the secondary absorption is primary absorption of the flue gas. Finally, the reaction liquid of a dilute concentration in the second stage 2412 flows into the generator 5 from the first liquid outlet 29.

Third stage absorption: the reaction liquid flows into the first segment 2411 from the first spraying port of the second pipe 26 and flows into the first pipe 25, the reaction liquid flows down in a film shape along the pipe circumferential direction outside the first pipe 25, and then falls down again after being collected at the bottom of the horizontal pipe to strike the next row of pipe bundles. During the process, the reaction liquid is reversely and directly contacted with the flue gas to absorb the water vapor in the flue gas, a third-stage deep absorption process is performed, the absorption process releases heat, and the generated heat is transferred to the horizontal pipe wall of the first pipe 25 through the solution to heat the boiler feed water 10 flowing in the first pipe 25, so that the purpose of utilizing waste heat is achieved, and meanwhile, the solution is cooled more conveniently in the absorption process. Wherein boiler feed water 10 enters first tubes 25 from the inlet of first tubes 25 and is heated through the multiple rows of tube bundles of first tubes 25.

In some embodiments, the housing 24 further has an air outlet 28 and a gas-liquid separation device (not shown) formed at the top of the housing 24 and in communication with the first chamber for exhausting flue gas through the air outlet 28, the gas-liquid separation device being disposed within the air outlet 28 for separating liquid from the flue gas flowing out through the air outlet 28. Specifically, as shown in fig. 1-2, the number of air outlets 28 may be set according to actual conditions, for example: the number of the air outlets 28 may be plural, or the number of the air outlets 28 may be 1, and the gas-liquid separation device is provided in the air outlets 28. Therefore, the water in the flue gas flowing out of the falling film absorber 2 can be separated by the gas-liquid separation device to ensure that the flue gas flowing out of the falling film absorber 2 is clean unsaturated flue gas, thereby greatly reducing the risk of corrosion of a subsequent chimney and prolonging the service life of the chimney

In some embodiments, the steam boiler heating apparatus 100 further comprises a flash evaporator 3, a heat accumulator 4, and a generator 5.

The flash evaporator 3 communicates with the steam boiler 101 so that water flowing out through the steam boiler 101 is flashed into steam. Specifically, as shown in fig. 1, the flash evaporator 3 is the flash evaporator 3, a drain port of the steam boiler 101 is communicated with an inlet of the flash evaporator 3, and sewage generated in the steam boiler 101 may be discharged into the flash evaporator 3, thereby flashing the sewage into low pressure steam through the flash evaporator 3.

One end of the heat accumulator 4 is respectively communicated with the steam boiler 101 and the flash evaporator 3, so that the steam flowing out of the flash evaporator 3 and the steam flowing out of the steam boiler 101 flow into the heat accumulator 4 to cause the steam flowing out of the steam boiler 101 to heat the steam flowing out of the flash evaporator 3 through the heat accumulator 4. Specifically, as shown in fig. 1, the heat accumulator 4 is a steam heat accumulator 4, and an inlet of the heat accumulator 4 is respectively communicated with an outlet of the steam boiler 101 and an inlet of the flash evaporator 3, so that additional high-temperature steam generated by adjusting a load of the steam boiler 101 and low-pressure steam generated by the flash evaporator 3 flow into the heat accumulator 4 together, so that the steam is mixed and exchanges heat in the heat accumulator 4 to form a high-quality heat source, and condensed water in the flash evaporator 3 is directly discharged out of the flash evaporator 3 or directly processed to be used as a supplement of process water.

The generator 5 is communicated with the other end of the heat accumulator 4, so that the steam flowing out of the heat accumulator 4 flows into the generator 5, the generator 5 is communicated with one end of the falling film absorber 2, so that the steam in the generator 5 heats the reaction liquid flowing out of the falling film absorber 2 to concentrate the reaction liquid, and the generator 5 is communicated with the other end of the falling film absorber 2, so that the reaction liquid concentrated by the generator 5 flows into the falling film absorber 2. Specifically, as shown in fig. 1, the inlet of the generator 5 is communicated with the outlet of the heat accumulator 4, so that the steam in the heat accumulator 4 flows into the generator 5, the inlet of the generator 5 is communicated with the first liquid outlet 29 of the thermal falling film absorber 2, so that the dilute concentration reactant liquid flowing out of the thermal falling film absorber 2 flows into the generator 5, and the reactant liquid can be heated by the heat of the steam, so that the concentration of the reactant liquid is increased to concentrate the reactant liquid.

In some embodiments, the steam boiler heat supply apparatus 100 further includes a heat exchanger 6, where the heat exchanger 6 has a first passage (not shown in the drawing) and a second passage (not shown in the drawing) that are independent of each other and can exchange heat, and both ends of the first passage are respectively communicated with the steam boiler 101 and the water outlet 23, so that water in the falling film absorber 2 flows into the steam boiler 101 through the first passage, and the second passage is communicated with the generator 5, so that secondary steam flowing out through the generator 5 heats water in the first passage through the second passage. Specifically, as shown in fig. 1, the heat exchanger 6 is the heat exchanger 6, the inlet of the first passage is communicated with the water outlet 23 of the first pipe 25, the outlet of the first passage is communicated with the inlet of the steam boiler 101, so that water heated by the first pipe 25 flows into the steam boiler 101 through the first passage, the inlet of the second passage is communicated with the outlet of the generator 5, as the dilute concentration reaction liquid in the generator 2 exchanges heat with hot water flowing out of the steam boiler 101 in the generator 2, the dilute concentration reaction liquid is heated and concentrated, secondary steam is generated after the dilute concentration reaction liquid is concentrated, so that steam in the generator 2 flows into the second passage, the steam in the second passage exchanges heat with water in the first passage, the temperature of the secondary steam in the second passage is reduced to form condensed water, the water temperature in the first passage is increased, and the condensed water flowing out of the second passage can be directly discharged or used as a supplement of process water.

In some embodiments, the generator 5 is in communication with the water inlet 22 such that water flowing out through the generator 5 flows into the falling film absorber 2. Specifically, as shown in fig. 1, since the steam generated in the heat accumulator 4 and the reaction liquid of a dilute concentration in the falling film absorber 2 exchange heat in the generator 5, so that the steam temperature in the generator 5 is lowered and condensed water is simultaneously generated, the reaction liquid of a dilute concentration is raised in temperature and becomes a reaction liquid of a concentrated concentration, whereby the outlet of the generator 5 communicates with the water inlet 22 of the first pipe 25, the condensed water in the generator 5 can be flowed into the first pipe 25 to provide water resources to the first pipe 25.

In some embodiments, the steam boiler heating apparatus 100 further includes a transfer box 7, where the transfer box 7 has a third passage (not shown in the drawing) and a fourth passage (not shown in the drawing) that are independent of each other and can perform heat exchange, and both ends of the third passage are respectively communicated with one end of the falling film absorber 2 and the generator 5, so that the reaction liquid flowing out through the falling film absorber 2 flows into the generator 5 through the third passage, the fourth passage is communicated with the generator 5 so that the reaction liquid in the third passage is heated through the fourth passage by the reaction flowing out through the generator 5, and the fourth passage is communicated with the other end of the falling film absorber 2 so that the reaction liquid flowing out through the fourth passage flows into the falling film absorber 2. Specifically, as shown in fig. 1, the inlet of the third passage is communicated with the first liquid outlet 29, the outlet of the third passage is communicated with the inlet of the generator 5, so that the dilute concentration reaction liquid in the falling film absorber 2 flows into the generator 5 through the third passage, the inlet of the fourth passage is communicated with the outlet of the generator 5, so that the reaction liquid after heating and concentrating in the generator 5 flows into the fourth passage, the reaction liquid in the third passage and the reaction liquid in the fourth passage exchange heat, so that the temperature of the reaction liquid in the third passage rises, the temperature in the fourth passage drops, and the outlet of the fourth passage is communicated with the first spray pipe of the falling film absorber 2, so that the reaction liquid after heat exchange and temperature drop flows into the first spray pipe of the falling film absorber 2 through the fourth passage. Therefore, the reaction liquid flowing into the generator 5 can be initially heated, so that the dilute solution in the third passage is preheated before entering the generator 5 and enters the generator 5, and meanwhile, the concentrated solution is precooled and enters the falling film absorber 2, and the low-temperature concentrated solution is beneficial to increasing the absorption rate, so that the heat absorption efficiency of the falling film absorber 2 is improved.

In some embodiments, the steam boiler heating apparatus 100 further comprises a water processor 8, the water processor 8 being in communication with the steam boiler 101 and the flash vessel 3, respectively, such that liquid exiting through the steam boiler 101 flows into the flash vessel 3 through the water processor 8. Specifically, as shown in fig. 1, the water processor 8 is the water processor 8, the inlet of the water processor 8 is communicated with the outlet of the steam boiler 101, and the outlet of the water processor 8 is communicated with the inlet of the flash evaporator 3, so that the waste water generated in the steam boiler 101 can flow into the flash evaporator 3 after impurities in the waste water are removed by the water processor 8, and the impurities in the waste water in the steam boiler 101 are prevented from blocking subsequent pipelines.

In some embodiments, the other end of the thermal network management communicates with the water treatment device 8 so that water flowing out through the thermal network management flows into the water treatment device 8. Specifically, the steam becomes the heating backwater 9 after heating the user through the heating power network management, and the outlet of the heating power network management is communicated with the inlet of the water processor 8, so that the heating backwater 9 is used as a water source and the wastewater generated by the steam boiler 101 flows into the flash evaporation assembly through the water processor 8 at the same time, the heat energy of the heating backwater 9 and the wastewater generated by the steam boiler 101 is fully utilized, and the heat loss of the heating backwater 9 is reduced.

The operation of the steam boiler heating device 100 according to the embodiment of the present utility model will be described in detail.

The high-temperature hot water generated by the steam boiler 101 after fixed and continuous drainage flows out of the boiler and enters the water processor 8, and in addition, the high-temperature backwater enters the water processor 8, and after the high-temperature hot water and the high-temperature backwater flow out of the water processor 8, the high-temperature hot water and the high-temperature backwater are discharged into the flash evaporator 3, wherein part of the high-temperature hot water become steam in the flash evaporator 3 and flow out of the flash evaporator 3 and then flow into the heat accumulator 4, and the other part of the high-temperature hot water becomes condensed water in the flash evaporator 3 and then flows out of the flash evaporator 3. In addition, part of the high-temperature steam is extracted from the boiler drum and enters the steam accumulator 4. The steam flowing from the steam boiler 101 and the steam flowing from the heat accumulator 4 fill the steam heat accumulator 4, and then flow from the steam heat accumulator 4 into the generator 5.

The high-temperature dry flue gas generated after the steam boiler 101 is combusted is discharged from the steam boiler 101 and enters the dryer 1 to be in direct contact with the raw fuel entering from the feed inlet of the dryer 1 for heat exchange, the heat transfer efficiency is high in the mode, the fuel cannot be ignited due to low oxygen content in the flue gas, water in the fuel is changed into water vapor to enter the flue gas, wet flue gas flows out from the flue outlet and enters the reactor, the raw fuel is dried to become fuel with proper humidity, and the fuel flows out from the discharge outlet and enters the feeder of the steam boiler 101 for combustion.

In the falling film absorber 2, the reaction liquid enters the liquid distributor from the inlet of the reactor, three-stage absorption exists in the reactor, so that the reactor is more efficient and compact, the phenomena of corrosion and abrasion of the horizontal first pipe 25 caused by acid gas and particulate matters contained in the flue gas are greatly relieved, the treated flue gas is low-temperature, clean and dry unsaturated flue gas which flows out from the flue outlet of the falling film absorber 2 and is exhausted, and corrosion of a back-end chimney is avoided.

In order to recycle working medium, the dilute concentration reaction liquid flowing out of the first liquid outlet 29 of the falling film absorber 2 needs to be heated and regenerated in the generator 5, the use level of high-temperature steam in the generator 5 can be effectively reduced by preheating the dilute solution before entering the generator 5, so that the transfer box 7 is arranged, the low-temperature dilute solution enters the transfer box 7 through the first liquid outlet 29 of the falling film absorber 2, the high-temperature concentrated reaction liquid regenerated by the generator 5 enters the transfer box 7, heat transfer occurs between the high-temperature concentrated reaction liquid and the transfer box 7, the dilute concentration reaction liquid is preheated before entering the generator 5 and enters the generator 5, and meanwhile, the concentrated solution is precooled and enters the absorption reactor from the transfer box 7, and the low-temperature concentrated solution is beneficial to increasing the absorption rate. Meanwhile, the transfer box 7 can be used as a buffer space for flowing solution.

In the generator 5, the dilute concentration reaction liquid exchanges heat with high-temperature steam in the generator 5, moisture is evaporated after the dilute reaction liquid absorbs heat to become concentrated reaction liquid, and the concentrated reaction liquid flows out of the generator 5 and enters the falling film absorber 2 again for circulation through the transfer box 7. The high-temperature steam is reduced in temperature after heat exchange, becomes condensed water and flows out of the generator 5, can enter a heat supply pipeline for heat supply, serves as a recovered water resource and can also flow into the third pipe 27 of the falling film absorber 2. The secondary steam generated by heating the dilute concentration reaction liquid is discharged from the generator 5 and enters the heat exchanger 6 to exchange heat with the boiler feed water 10 which is subjected to primary heating in the first pipe 25 of the falling film absorber 2, the boiler feed water 10 is subjected to secondary heating by the secondary steam and flows out of the heat exchanger 6, and the secondary steam flows out of the heat exchanger 6 after being cooled as recovered water resources.

After the flue gas of the steam boiler 101 is subjected to primary heating of wet fuel, water and waste heat in the flue gas are absorbed and recycled by three stages in the falling film absorption generator 5, so as to heat the boiler feed water 10 or other process water, and meanwhile, the recycled water resource is distilled water quality, thereby not only achieving the effect of drying the fuel, but also saving energy and reducing emission, and achieving the aim of energy cascade utilization.

In the technical scheme, the waste heat in boiler flue gas, fixed discharge and continuous discharge and heat supply network backwater is recycled through various energy-saving devices and used for drying boiler fuel, heating boiler feed water 10 and the like, and meanwhile, the recycled water resource is distilled water quality and can be used for boiler feed water 10, water for a desulfurization device, process liquid in a falling film absorber 2 and the like. The core component, namely the falling film absorber 2, adopts three-stage absorption, so that the corrosion problem of acid gas, particulate matters and the like in the flue gas to the horizontal first pipe 25 can be effectively alleviated, the absorption is more efficient due to the absorption of multiple stages of different functions, the arrangement is compact, the treated flue gas is clean and dry unsaturated flue gas, and the corrosion problem of a rear-end chimney is avoided. The absorption solution is regenerated and recycled by recovered steam or the like. The waste heat can be used for heating boiler feed water 10 or other process water, and the process water is heated by two stages, namely primary heating of a first pipe 25 in the absorption reactor and deep heating of secondary steam generated by the generator 5, so that the process water can be heated to the designated temperature and quality. The energy-saving device is efficient and compact, and can fully recycle waste heat resources with various qualities of the industrial steam boiler 101.

It should be noted that, the steam boiler heat supply apparatus 100 of the industrial hot water boiler according to the embodiment of the present utility model is related to the flow and control of the flue gas, steam and water, and the present utility model is not limited thereto, for example: the pump can be used for providing power for flue gas, steam and water, and the electromagnetic valve is used for controlling the on-off of the pipeline in the steam boiler heating device 100.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A steam boiler heating apparatus, comprising: a steam boiler; one end of the thermal network pipe is communicated with the steam boiler so that steam generated by the steam boiler flows into the thermal network pipe to enable the thermal network pipe to supply heat to a user; a fuel bin adapted to store fuel; a dryer having a chamber, a feed inlet, a smoke inlet, a discharge outlet and a smoke outlet, wherein the feed inlet, the smoke inlet, the discharge outlet and the smoke outlet are all communicated with the chamber, the feed inlet is communicated with the fuel bin so that fuel flowing out from the fuel bin flows into the chamber, the smoke inlet is communicated with the steam boiler so that flue gas in the steam boiler flows into the chamber to dry and heat the fuel, and the discharge outlet is communicated with the steam boiler so that the fuel dried by the dryer flows into the steam boiler; the falling film absorber comprises an air inlet, a water inlet and a water outlet, wherein the air inlet is communicated with a smoke outlet of the dryer so that smoke flowing out of the dryer flows into the falling film absorber through the air inlet, the water inlet is suitable for being filled with boiler feed water so that the boiler feed water and the smoke exchange heat in the falling film absorber to raise the temperature of the boiler feed water, and the water outlet is communicated with the steam boiler so that the boiler feed water heated by the falling film absorber flows into the steam boiler.

2. A steam boiler heating arrangement according to claim 1, wherein the falling film absorber comprises:

a housing, the air inlet being formed on the housing and being disposed adjacent to a bottom of the housing so that flue gas in the steam boiler flows into the housing;

the first pipe is arranged in the shell, the water inlet is formed at one end of the first pipe, and the water outlet is formed at the other end of the first pipe;

the second pipe, the second pipe is established in the casing and be located the top of first pipe, the second pipe is followed the length direction of casing extends, the second pipe is equipped with a plurality of openings first spray mouths down, a plurality of first spray mouths are followed the extending direction of second pipe extends, be suitable for in the second pipe and let in the reaction liquid, so that the reaction liquid sprays through first spray mouths on the outer peripheral surface of first pipe, the reaction liquid absorbs the heat and the moisture of flue gas in the casing are in order to heat boiler feedwater in the first pipe.

3. The steam boiler heat supply apparatus according to claim 2, wherein the housing includes a first housing and a second housing which are disposed in order in a vertical direction, the first housing has a first chamber, the second housing has a second chamber, the first chamber and the second chamber are independent of each other in the vertical direction, the first chamber includes a first section and a second section which are communicated in order in the vertical direction, the second pipe and the first pipe are disposed in the first section, the second section is for storing a reaction liquid flowing out through the second pipe, the air inlet is disposed on the second housing and is communicated with the second chamber, the air inlet is disposed adjacent to a bottom of the second chamber,

The falling film absorber also comprises a plurality of one-way valves and a third pipe extending along the width direction of the shell, the third pipe is arranged in the second cavity and is adjacent to the top of the second cavity, a plurality of second spray openings are arranged on the third pipe, the second spray openings extend along the extending direction of the third pipe, the third pipe is suitable for being introduced with boiler feed water, so that the boiler feed water is sprayed in the second cavity through the second spray openings to enable the boiler feed water to absorb impurities in the flue gas,

the check valves are arranged at the bottom of the first shell and are communicated with the second shell, or the check valves are arranged at the top of the second shell and are communicated with the first shell, so that flue gas in the second cavity flows into the second section through the check valves.

4. A steam boiler heat supply apparatus according to claim 3, wherein the housing further has an air outlet formed at the top of the housing and communicating with the first chamber so that the flue gas is discharged through the air outlet, and a gas-liquid separation device provided in the air outlet so as to separate liquid in the flue gas flowing out through the air outlet.

5. A steam boiler heating apparatus according to claim 1, further comprising:

a flash vessel in communication with the steam boiler for flashing water exiting the steam boiler into steam;

the heat accumulator is communicated with the steam boiler and the flash evaporator at one end of the heat accumulator respectively, so that steam flowing out of the flash evaporator and steam flowing out of the steam boiler flow into the heat accumulator to enable the steam flowing out of the steam boiler to heat the steam flowing out of the flash evaporator through the heat accumulator;

the generator is communicated with the other end of the heat accumulator so that steam flowing out of the heat accumulator flows into the generator, the generator is communicated with one end of the falling film absorber so that steam in the generator heats the reaction liquid flowing out of the falling film absorber to concentrate the reaction liquid, and the generator is communicated with the other end of the falling film absorber so that the reaction liquid concentrated by the generator flows into the falling film absorber.

6. The steam boiler heating apparatus according to claim 5, further comprising a heat exchanger having a first passage and a second passage which are independent of each other and heat-exchange-enabled, both ends of the first passage being respectively communicated with the steam boiler and the water outlet so that water in the falling film absorber flows into the steam boiler through the first passage, the second passage being communicated with the generator so that secondary steam flowing out through the generator heats water in the first passage through the second passage.

7. A steam boiler heating apparatus as claimed in claim 5, wherein the generator is in communication with the water inlet so that water flowing out through the generator flows into the falling film absorber.

8. The steam boiler heating apparatus according to claim 5, further comprising a transfer box having a third passage and a fourth passage which are independent of each other and can perform heat exchange, both ends of the third passage being respectively communicated with one end of the falling film absorber and the generator so that the reaction liquid flowing out through the falling film absorber flows into the generator through the third passage, the fourth passage being communicated with the generator so that the reaction liquid in the third passage is heated through the fourth passage, the fourth passage being communicated with the other end of the falling film absorber so that the reaction liquid flowing out through the fourth passage flows into the falling film absorber.

9. The steam boiler heating apparatus of claim 5, further comprising a water treater in communication with the steam boiler and the flash vessel, respectively, such that liquid flowing out through the steam boiler flows into the flash vessel through the water treater.

10. The steam boiler heating apparatus according to claim 9, wherein the other end of the thermal network pipe is communicated with the water treatment device so that water flowing out through the thermal network pipe flows into the water treatment device.