CN220083319U - Industrial hot water boiler heating system - Google Patents

Abstract

The utility model discloses an industrial hot water boiler heating system which comprises a hot water boiler, a drying component, a falling film absorber and a first heat exchanger, wherein the hot water boiler is provided with a hearth, a first feed port, a first smoke outlet, a first water outlet and a second water outlet, the first feed port, the first smoke outlet, the first water outlet and the second water outlet are all communicated with the hearth, the drying component is provided with a second feed port, a smoke inlet, a discharge port and a second smoke outlet, the second feed port is suitable for being filled with fuel, the smoke inlet is communicated with the hot water boiler, the discharge port is communicated with the hot water boiler, the falling film absorber comprises an air inlet, a water inlet and a water outlet, the air inlet is communicated with the second smoke outlet of the drying component, the water inlet is suitable for being filled with boiler water, and the water outlet is communicated with the hot water boiler. The industrial hot water boiler heating system has the advantages of simple structure, high heat energy utilization and the like.

Description

Industrial hot water boiler heating system

Technical Field

The utility model relates to the field of hot water boilers, in particular to an industrial hot water boiler heating system.

Background

The industrial hot water boiler is a heating equipment releasing heat, and is widely applied to the industries with disinfection effects such as food processing, medical industry, pharmaceutical industry, canning industry and the like.

In the related art, the energy loss of the industrial hot water boiler is large, and the heat efficiency of the hot water boiler is low.

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:

some 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 loss exists in the energy supply process of the fuels, so that the thermal efficiency of the hot water boiler 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 70% of the total loss, is direct exhaust smoke generated by the environment-friendly treatment of the hot water boiler, and contains water vapor; the heat loss of the blowdown is due to blowdown measures carried out when the hot water boiler frequently adjusts the load for adjusting the water quality balance or avoiding the 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. The heat loss can be recovered by the energy-saving environment-friendly device, water is recovered and stored, so that the purposes of energy saving, cost reduction, efficiency enhancement and integration of source network and charge storage are achieved.

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 industrial hot water boiler heating system with simple structure and high heat recovery efficiency.

An industrial hot water boiler heating system according to an embodiment of the present utility model includes: the hot water boiler is provided with a hearth, a first feeding port, a first smoke outlet, a first water outlet and a second water outlet, and the first feeding port, the first smoke outlet, the first water outlet and the second water outlet are all communicated with the hearth; one end of the thermal network pipe is communicated with the hot water boiler so that hot water generated by the hot water 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; the drying assembly is provided with a second feed inlet, a smoke inlet, a discharge outlet and a second smoke outlet, the second feed inlet is communicated with the fuel bin so that fuel flowing out of the fuel bin flows into the drying assembly, the smoke inlet is communicated with the first smoke outlet of the hot water boiler so that flue gas in the hot water boiler flows into the drying assembly to dry and heat the fuel, and the discharge outlet is communicated with the first feed inlet of the hot water boiler so that fuel dried by the drying assembly flows into the hot water boiler; a falling film absorber comprising an air inlet, a water inlet and a water outlet, wherein the air inlet is communicated with a second smoke outlet of the drying assembly so that the smoke flowing out of the drying assembly 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 hot water boiler so that the boiler feed water heated by the falling film absorber flows into the hot water boiler; the first heat exchanger comprises a first flow path and a second flow path which are independent and can perform heat exchange, the first flow path is communicated with the first water outlet so that waste water flowing out from the first water outlet of the hot water boiler flows into the first flow path, and the second flow path is suitable for being communicated with water so that the waste water in the first flow path heats water in the second flow path.

According to the industrial hot water boiler heating system provided by the embodiment of the utility model, the hot water boiler, the drying assembly, the falling film absorber and the first heat exchanger are arranged, and the heat of the flue gas is utilized to dry fuel and heat the water fed by the boiler, so that the heat energy of the flue gas in the hot water boiler is effectively recovered, and the heat efficiency of the hot water boiler is improved.

In some embodiments, the industrial hot water boiler heating system further comprises a generator, wherein the generator is communicated with the second water outlet of the hot water boiler, so that hot water flowing out of the second water outlet of the hot water boiler flows into the generator, the generator is communicated with one end of the falling film absorber, so that hot water 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 industrial hot water boiler heating system further comprises a second heat exchanger having a third flow path and a fourth flow path which are independent of each other and can perform heat exchange, wherein two ends of the third flow path are respectively communicated with the hot water boiler and the water outlet, so that water in the falling film absorber flows into the hot water boiler through the third flow path, and the fourth flow path is communicated with the generator, so that secondary steam flowing out through the generator heats water in the third flow path through the fourth flow path.

In some embodiments, the falling film absorber comprises: a housing, the air inlet being formed on the housing and being disposed adjacent to the bottom of the housing so that flue gas in the hot water boiler flows into the housing; the falling film pipe is arranged in the shell, the water inlet is formed at one end of the falling film pipe, and the water outlet is formed at the other end of the falling film pipe; the first spray pipe is arranged in the shell and is located above the falling film pipe, the first spray pipe extends along the length direction of the shell, the first spray pipe is provided with a plurality of first spray openings with downward openings, the first spray openings extend along the extending direction of the first spray pipe, reaction liquid is introduced into the first spray pipe, so that the reaction liquid is sprayed on the peripheral surface of the falling film pipe through the first spray openings, and the reaction liquid absorbs heat and moisture of flue gas in the shell to heat boiler water in the falling film 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 reaction cavity, the second shell is provided with a second reaction cavity, the first reaction cavity and the second reaction cavity are mutually independent along the up-down direction, the first reaction cavity comprises a first cavity and a second cavity which are sequentially communicated along the up-down direction, the first spray pipe and the falling film pipe are arranged in the first cavity, the second cavity is used for storing reaction liquid flowing out through the first spray pipe, the air inlet is arranged on the second shell and is communicated with the second reaction cavity, the air inlet is arranged adjacent to the bottom of the second reaction cavity, the falling film absorber further comprises a plurality of one-way valves and second spray pipes which are arranged in the second reaction cavity and are adjacent to the top of the second reaction cavity, a plurality of second spray openings are arranged on the second spray pipes, the second spray pipes are arranged in the second reaction cavity, the second spray pipes are communicated with the second spray valves through the first spray pipes and the second spray valves, the second spray pipes are arranged in the second reaction cavity, the second spray pipes are communicated with the water inlet and the second spray pipes through the first spray valves, and the second spray valves are communicated with the second spray valves, and the second spray pipes are arranged in the water-absorbing the flue gas.

In some embodiments, the housing further has an air outlet formed at the top of the housing and communicating with the first reaction chamber so that the flue gas is discharged through the air outlet, and a gas-liquid separator provided in the air outlet so as to separate liquid in the flue gas flowing out through the air outlet.

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

In some embodiments, the industrial hot water boiler heating system further comprises a transfer box, wherein the transfer box is provided with a fifth flow path and a sixth flow path which are independent and can perform heat exchange, two ends of the fifth flow path are respectively communicated with one end of the falling film absorber and the generator, so that the reaction liquid flowing out of the falling film absorber flows into the generator through the fifth flow path, the sixth flow path is communicated with the generator, so that the reaction liquid in the fifth flow path is heated through the sixth flow path by the reaction flowing out of the generator, and the sixth flow path is communicated with the other end of the falling film absorber, so that the reaction liquid flowing out of the sixth flow path flows into the falling film absorber.

In some embodiments, the industrial hot water boiler heating system further comprises a water treatment device in communication with the hot water boiler and the first flow path of the first heat exchanger, respectively, such that liquid exiting through the hot water boiler flows into the first flow path of the first heat exchanger through the water treatment device.

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 view of a heating system of an industrial hot water boiler according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of the falling film absorber of the heating system of the industrial hot water boiler according to the embodiment of the present utility model.

Reference numerals:

an industrial hot water boiler heating system 100;

a hot water boiler 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 cavity 2411; a second cavity 2412; a second housing 242; a falling film tube 25; a first shower pipe 26; a second shower pipe 27; an air outlet 28; a first liquid outlet 29; a second liquid outlet 20; a one-way valve 201;

a drying assembly 3;

a generator 4; a first heat exchanger 5; a second heat exchanger 6; a transfer box 7; a water treatment device 8; heating backwater 9; boiler feed water 10; a fuel silo 101.

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.

An industrial hot water boiler heating system according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1-2, an industrial hot water boiler heating system 100 according to an embodiment of the present utility model comprises a hot water boiler 1, a drying assembly 3, a falling film absorber 2, a first heat exchanger 5, a thermodynamic network pipe (not shown in the figures) and a fuel silo 101.

The hot water boiler 1 has a furnace, a first feed inlet, a first outlet flue, a first outlet port 23 and a second outlet port 23, the first feed inlet, the first outlet flue, the first outlet port 23 and the second outlet port 23 being all in communication with the furnace. Specifically, as shown in fig. 1, the first feed inlet and the first smoke outlet are arranged near the top of the hot water boiler 1, the first water outlet 23 and the second water outlet 23 are arranged near the bottom of the hearth, fuel can flow into the hearth through the first feed inlet to be burnt, smoke generated after the fuel is burnt can be discharged out of the hearth through the first smoke outlet, waste water generated by the hot water boiler 1 is discharged through the first water outlet 23, and high-temperature hot water generated by the hot water boiler 1 is discharged from the second water outlet 23.

One end of the thermal network pipe is communicated with the hot water boiler 1, so that hot water generated by the hot water boiler 1 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 hot water boiler 1 so that the high-temperature hot water generated by the hot water boiler 1 flows into the thermal network pipe, and thus the high-temperature hot water supplies heat to a user through the thermal network pipe.

The fuel cartridge 101 is adapted to hold fuel. The drying assembly 3 has a second feed inlet, a smoke inlet, a discharge outlet and a second smoke outlet, the second feed inlet is communicated with the fuel bin 101 so that fuel flows into the drying assembly 3, the smoke inlet is communicated with the first smoke outlet of the hot water boiler 1 so that flue gas in the hot water boiler 1 flows into the drying assembly 3 to dry and heat the fuel, and the discharge outlet is communicated with the first feed inlet of the hot water boiler 1 so that the fuel dried by the drying assembly 3 flows into the hot water boiler 1. Specifically, as shown in fig. 1, the drying component 3 is a dryer, the second feeding port of the drying component 3 may be connected to the fuel bin 101, so that fuel in the fuel bin 101 may flow into the drying component 3 through the second feeding port, the smoke inlet communicates with the first smoke outlet of the hot water boiler 1, so that smoke generated after combustion in the hot water boiler 1 may flow into the drying component 3 through the first smoke outlet and the smoke inlet, so that the smoke heats the fuel in the drying component 3 to dry the fuel, and the discharge port of the drying component 3 communicates with the first feeding port of the hot water boiler 1, so that the dried fuel flows into the hot water boiler 1 to be incinerated.

The falling film absorber 2 comprises an air inlet 21, an air inlet 22 and an air outlet 23, wherein the air inlet 21 is communicated with the second smoke outlet of the drying assembly 3, so that smoke flowing out of the drying assembly 3 flows into the falling film absorber 2 through the air inlet 21, the air inlet 22 is suitable for being communicated with the boiler feed water 10, so that the boiler feed water 10 and the smoke 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 hot water boiler 1, so that the boiler feed water 10 heated by the falling film absorber 2 flows into the hot water boiler 1. Specifically, as shown in fig. 1, the smoke inlet of the drying component 3 is communicated with the air inlet 21 of the falling film absorber 2, the smoke in the drying component 3 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 hot water boiler 1 body, and the boiler feed water 10 heated by the falling film absorber 2 flows into the hot water boiler 1 body.

The first heat exchanger 5 comprises a first flow path and a second flow path which are mutually independent and can perform heat exchange, wherein the first flow path is communicated with the first water outlet 23, so that the waste water flowing out of the first water outlet 23 of the hot water boiler 1 flows into the first flow path, and the second flow path is suitable for introducing water, so that the waste water in the first flow path heats the water in the second flow path. Specifically, as shown in fig. 1, the inlet of the first flow path is communicated with the first water outlet 23 of the hot water boiler 1, so that the waste water generated in the hot water boiler 1 flows into the first flow path through the first flow path, and the inlet of the second flow path is suitable for introducing water (such as boiler feed water 10, tap water, domestic water and the like), so that the waste water flowing out of the hot water boiler 1 can heat the water in the second flow path through the first flow path, thereby efficiently utilizing the heat energy of the waste water flowing out of the hot water boiler 1 and reducing the pollution discharge heat loss of the hot water boiler 1.

According to the industrial hot water boiler heat supply system 100 provided by the embodiment of the utility model, the hot water boiler 1, the drying assembly 3, the falling film absorber 2 and the first heat exchanger 5 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 hot water boiler 1 is effectively recovered, and the heat efficiency of the hot water boiler 1 is improved.

In some embodiments, the industrial hot water boiler heating system 100 further comprises a generator 4, the generator 4 is communicated with the second water outlet 23 of the hot water boiler 1, so that hot water flowing out of the second water outlet of the hot water boiler flows into the generator 4, one end of the generator 4 is communicated with one end of the falling film absorber 2, so that hot water in the generator 4 heats the reaction liquid flowing out of the falling film absorber 2 to concentrate the reaction liquid, and the other end of the generator 4 is communicated with the other end of the falling film absorber 2, so that the reaction liquid concentrated by the generator 4 flows into the falling film absorber 2. Specifically, as shown in fig. 1, the inlet of the generator 4 is communicated with the second water outlet 23 of the hot water boiler 1, so that the hot water generated in the hot water boiler 1 flows into the generator 4, the liquid inlet of the generator 4 is communicated with the liquid outlet of the falling film absorber 2, the liquid outlet of the generator 4 is communicated with the liquid inlet of the falling film absorber 2, the dilute concentration reaction liquid in the falling film absorber 2 flows into the generator 4 and is heated by the hot water in the generator 4, so that the dilute concentration reaction liquid is concentrated into the concentrated reaction liquid and flows into the falling film reaction assembly again, the heat of the hot water flowing out of the hot water boiler 1 is reasonably utilized, the reaction liquid can be recycled, and the operation cost of the industrial hot water boiler heat supply system 100 is reduced.

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

The air inlet 21 is formed on the housing 24 and is arranged adjacent to the bottom of the housing 24 so that flue gas in the hot water boiler 1 flows into the housing 24. Specifically, as shown in fig. 1-2, the inner peripheral contour of the housing 24 is generally rectangular parallelepiped, and the air inlet 21 is disposed adjacent to the bottom of the housing 24, so that the flue gas in the hot water boiler 1 can flow into the housing 24 through the bottom of the housing 24.

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

The first spray pipe 26 is arranged in the shell 24 and is located above the falling film pipe 25, the first spray pipe 26 extends along the length direction of the shell 24, the first spray pipe 26 is provided with a plurality of first spray openings with downward openings, the plurality of first spray openings extend along the extending direction of the first spray pipe 26, reaction liquid is suitable to be introduced into the first spray pipe 26, so that the reaction liquid is sprayed on the peripheral surface of the falling film pipe 25 through the first spray openings, and the reaction liquid absorbs heat and moisture of flue gas in the shell 24 to heat the boiler feed water 10 in the falling film pipe 25. Specifically, as shown in fig. 1-2, the first spraying pipe 26 is a spraying pipe, the first spraying pipe 26 is arranged in the shell 24 and extends along the left-right direction, the first spraying pipe 26 is located above the falling film pipe 25 and is arranged at intervals along the up-down direction with the falling film pipe 25, a plurality of first spraying ports are arranged below the first spraying pipe 26 and are sequentially arranged at intervals along the left-right direction, the right end of the first spraying pipe 26 extends out of the shell 24, the liquid inlet is formed at the right end of the first spraying pipe 26, the reaction liquid flowing out of the generator 4 is sprayed on the falling film pipe 25 through the first spraying ports and forms a film on the falling film pipe 25 to absorb heat and moisture in smoke in the shell 24 and heat water in the falling film pipe 25 through the falling film pipe 25.

The housing 24 includes a first housing 241 and a second housing 242 sequentially disposed in an up-down direction, the first housing 241 has a first reaction chamber, the second housing 242 has a second reaction chamber, the first reaction chamber and the second reaction chamber are independent of each other in the up-down direction, the first reaction chamber includes a first chamber 2411 and a second chamber 2412 sequentially communicated in the up-down direction, a first shower pipe 26 and a falling film pipe 25 are provided in the first chamber 2411, the second chamber 2412 is for storing a reaction liquid flowing out through the first shower pipe 26, an air inlet 21 is provided on the second housing 242 and is communicated with the second reaction chamber, and the air inlet 21 is provided adjacent to a bottom of the second reaction chamber. Specifically, as shown in fig. 1-2, the first housing 241 is disposed above the second housing 242, and the first and second housings 241 and 242 are independent from each other such that the first and second reaction chambers are not in communication with each other, the first reaction chamber of the first housing 241 having first and second chambers 2411 and 2412 communicating in an up-down direction.

In some embodiments, the falling film absorber 2 further comprises a plurality of check valves 201 and a second spray pipe 27 extending along the width direction of the housing 24, the second spray pipe 27 being disposed within and adjacent to the top of the second reaction chamber, the second spray pipe 27 being provided with a plurality of second spray ports extending along the extending direction of the second spray pipe 27, the second spray pipe 27 being adapted to pass into the boiler feedwater 10 such that the boiler feedwater 10 is sprayed within the second reaction chamber through the second spray ports to cause the boiler feedwater 10 to absorb impurities in the flue gas. Specifically, as shown in fig. 1-2, the second spray pipe 27 is a spray pipe, the second spray pipe 27 is arranged in the second reaction cavity and extends along the left-right direction, the second spray pipe 27 is arranged adjacent to the top of the second reaction cavity, a plurality of second spray ports are arranged on the second spray pipe 27, the plurality of second spray ports are arranged at intervals along the left-right direction, the air inlet 21 is communicated with the second reaction cavity and is arranged adjacent to the bottom of the second reaction cavity, and therefore flue gas flowing out of the hot water boiler 1 flows into the second reaction cavity through the air inlet 21 to be sprayed through the second spray pipe 27.

A plurality of check valves 201 are provided at the bottom of the first housing 241 and communicate with the second housing 242, or a plurality of check valves 201 are provided at the top of the second housing 242 and communicate with the first housing 241, so that the fumes in the second reaction chamber flow into the second chamber 2412 through the check valves 201. Specifically, as shown in fig. 1-2, the check valve 201 is a gas check valve 201, and the check valves 201 may be multiple, where multiple check valves 201 are disposed at the bottom of the first reaction chamber at intervals and are communicated with the second reaction chamber, or multiple check valves 201 are disposed at the top of the second reaction chamber and are communicated with the first reaction chamber, so that the internal flue gas in the second reaction chamber flows into the first reaction chamber through the gas check valve 201, and the reaction solution in the first reaction chamber cannot flow into the second reaction chamber.

The second housing 242 is provided with a first liquid outlet 29 and a second liquid outlet 20, and the second liquid outlet 20 is arranged adjacent to the bottom of the second housing 242 and is communicated with the second reaction chamber. Thus, the reaction liquid in the first case 241 is discharged out of the first case 241 through the first liquid outlet 29, and the water in the second case 242 is discharged out of the second case 242 through the second liquid outlet 20.

In some embodiments, the falling film pipes 25, the first spray pipes 26, the second spray pipes 27 and the check valves 201 are all multiple, the second spray pipes 27, the falling film pipes 25 and the first spray pipes 26 are all arranged at intervals along the front-back direction, the first spray pipes 26 and the falling film pipes 25 are arranged at intervals in the up-down direction in a one-to-one correspondence manner, the check valves 201 are arranged at intervals along the front-back direction to form multiple rows, and each row of check valves 201 comprises a plurality of check valves 201 arranged at intervals along the left-right direction. Thereby, the falling film absorber 2 is arranged more reasonably.

The operation of the falling film absorber 2 of the industrial hot water boiler heating system 100 according to the embodiment of the present utility model is described in detail as follows.

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 reaction cavity through the flue gas inlet, meanwhile, liquid is sprayed in the second reaction cavity in a mist or drop shape from the second spray 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, or alkali liquor, as the case may be.

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

Since the reaction liquid in the second chamber 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 chamber 2412 is weaker than that of the reaction liquid of a concentrated concentration on the falling film pipe 25, and thus, the secondary absorption is primary absorption of the flue gas. Finally, the dilute concentration of the reaction solution in the second chamber 2412 flows from the first liquid outlet 29 into the generator 4.

Third stage absorption: the reaction liquid flows into the first cavity 2411 from the first spraying opening of the first spraying pipe 26 and flows to the falling film pipe 25, the reaction liquid flows down in a film shape along the pipe circumference outside the falling film 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, the 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 falling film pipe 25 through the solution to heat the boiler feed water 10 flowing in the falling film pipe 25, so that the purpose of utilizing waste heat is achieved. Wherein boiler feed water 10 enters the drop membrane tubes 25 from the inlets of the drop membrane tubes 25 and is heated by the multiple rows of tube bundles of the drop membrane tubes 25.

In some embodiments, the housing 24 further has an air outlet 28, and an air-liquid separator (not shown) formed at the top of the housing 24 and in communication with the first reaction chamber for exhausting flue gas through the air outlet 28, the air-liquid separator 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 gas outlets 28 may be plural, or the number of the gas outlets 28 may be 1, and the gas-liquid separator is provided in the gas outlets 28. Therefore, the water in the flue gas flowing out of the falling film absorber 2 can be separated through the gas-liquid separator to ensure that the flue gas flowing out of the falling film absorber 2 is clean unsaturated flue gas, the risk of corrosion of a subsequent chimney is greatly reduced, and the service life of the chimney is prolonged.

In some embodiments, the industrial hot water boiler heating system 100 further comprises a second heat exchanger 6, wherein the second heat exchanger 6 has a third flow path (not shown in the figure) and a fourth flow path (not shown in the figure), which are independent of each other and can perform heat exchange, and both ends of the third flow path are respectively communicated with the hot water boiler 1 and the water outlet 23, so that water in the falling film absorber 2 flows into the hot water boiler 1 through the third flow path, and the fourth flow path is communicated with the generator 4, so that water flowing out through the generator 4 heats the water in the third flow path through the fourth flow path. Specifically, as shown in fig. 1, the inlet of the third flow path is communicated with the water outlet 23 of the falling film pipe 25, the outlet of the third flow path is communicated with the inlet of the hot water boiler 1, so that the water heated by the falling film pipe 25 flows into the hot water boiler 1 through the third flow path, the inlet of the fourth flow path is communicated with the outlet of the generator 4, the dilute concentration reaction liquid in the generator 4 is heated and concentrated due to heat exchange with the hot water flowing out of the hot water boiler 1 in the generator 4, and the secondary steam in the generator 4 flows into the fourth flow path due to the secondary steam generated after the concentration of the dilute concentration reaction liquid, so that the temperature of the secondary steam in the fourth flow path is reduced to generate condensed water, the water temperature in the third flow path is increased, and the condensed water flowing out of the fourth flow path can be directly discharged or used as the supplement of process water.

In some embodiments, the generator 4 is in communication with the water inlet 22 of the falling film absorber 2 such that water flowing out through the generator 4 flows into the falling film absorber 2. Specifically, since the hot water generated by the hot water boiler 1 and the reaction liquid of the dilute concentration in the falling film absorber 2 exchange heat in the generator 4, the temperature of the hot water generated by the hot water boiler 1 is reduced, the temperature of the reaction liquid of the dilute concentration is increased and becomes the reaction liquid of the concentrated concentration, and thus, the outlet of the generator 4 is communicated with the water inlet 22 of the falling film pipe 25, and the water after heat exchange and temperature reduction in the generator 4 can flow into the falling film pipe 25 to provide water resources for the falling film pipe 25.

In some embodiments, the industrial hot water boiler heating system 100 further includes a transfer box 7, where the transfer box 7 has a fifth flow path (not shown in the figure) and a sixth flow path (not shown in the figure) that are independent of each other and can perform heat exchange, and two ends of the fifth flow path are respectively communicated with one end of the falling film absorber 2 and the generator 4, so that the reaction liquid flowing out through the falling film absorber 2 flows into the generator 4 through the fifth flow path, the sixth flow path is communicated with the generator 4 so that the reaction liquid in the fifth flow path is heated through the sixth flow path by the reaction flowing out through the generator 4, and the sixth flow path is communicated with the other end of the falling film absorber 2 so that the reaction liquid flowing out through the sixth flow path flows into the falling film absorber 2.

Specifically, as shown in fig. 1, the inlet of the fifth flow path is communicated with the first liquid outlet 29 of the falling film absorber 2, the outlet of the fifth flow path is communicated with the inlet of the generator 4, so that the dilute concentration reaction liquid in the falling film absorber 2 flows into the generator 4 through the fifth flow path, the inlet of the sixth flow path is communicated with the outlet of the generator 4, so that the reaction liquid heated and concentrated in the generator 4 flows into the sixth flow path, the reaction liquid in the fifth flow path and the reaction liquid in the sixth flow path exchange heat, so that the temperature of the reaction liquid in the fifth flow path is increased, the temperature in the sixth flow path is reduced, and the outlet of the sixth flow path is communicated with the liquid inlet of the first spray pipe 26 of the falling film absorber 2, so that the reaction liquid cooled by heat exchange flows into the first spray pipe 26 of the falling film absorber 2 through the sixth flow path. Thus, the reaction liquid flowing into the generator 4 can be primarily heated, so that the dilute solution in the fifth flow path is preheated before entering the generator 4 and enters the generator 4, 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.

In some embodiments, the industrial hot water boiler heating system 100 further comprises a water treatment device 8, the water treatment device 8 being in communication with the hot water boiler 1 and the first flow path of the first heat exchanger 5, respectively, such that liquid exiting through the hot water boiler 1 flows into the first flow path of the first heat exchanger 5 through the water treatment device 8. Specifically, as shown in fig. 1, the inlet of the water treatment device 8 is communicated with the first water outlet 23 of the hot water boiler 1, and the outlet of the water treatment device 8 is communicated with the inlet of the first flow path of the first heat exchanger 5, so that the waste water generated in the hot water boiler 1 can flow into the first flow path after impurities in the waste water are removed by the water treatment device, and the impurities in the waste water in the hot water boiler 1 are prevented from blocking subsequent pipelines.

In some embodiments, the other end of the thermal network management is in communication with the water treatment device 8 so that water flowing out through the thermal network management flows into the water treatment device. 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, so that the heating backwater 9 is used as a water source and the wastewater generated by the hot water boiler 1 flows into the first flow path of the first heat exchanger 5 through the water processor, the heat energy of the wastewater generated by the heating backwater 9 and the steam boiler is fully utilized, and the heat loss of the heating backwater 9 is reduced.

The working process of the industrial hot water boiler heating system 100 according to the embodiment of the utility model is as follows:

the hot water generated by the sewage disposal of the hot water boiler 1 flows out from the second water outlet 23 of the hot water boiler 1, then enters the water treatment device 8, in addition, the high-temperature backwater enters the water treatment device 8, is treated in the water treatment device and then is discharged into the first flow path of the first heat exchanger 5, exchanges heat with the boiler feed water 10 entering the second flow path of the first heat exchanger 5, and flows out from the first flow path of the first heat exchanger 5 after the high-temperature backwater drops in the first flow path, and the boiler feed water 10 flows out from the second flow path of the first heat exchanger 5 after being heated. In addition, part of the hot water extracted from the hot water boiler 1 enters the generator 4 from the first water outlet 23.

The high-temperature dry flue gas generated after the combustion of the hot water boiler 1 enters the drying assembly 3 from the second feed inlet of the drying assembly 3 after being discharged from the outlet of the hot water boiler 1, and the fuel enters the flue gas drying assembly 3 from the flue gas inlet of the drying assembly 3 and is in direct contact with the flue gas for heat exchange.

In the falling film absorber 2, the reaction liquid enters the liquid distributor from the falling film absorber 2, three-stage absorption exists in the falling film absorber 2, so that the falling film absorber is more efficient and compact, the phenomena of corrosion and abrasion of the horizontal falling film pipe 25 caused by acid gas and particulate matters contained in the flue gas are greatly relieved, and the treated flue gas is low-temperature, clean and dry unsaturated flue gas which flows out from the air outlet 28 of the falling film absorber 2 and is exhausted, so that the corrosion of a rear-end chimney is avoided.

In order to recycle the working medium, the dilute solution flowing out of the two-stage liquid outlet 68 needs to be heated and regenerated at the generator 4, and the dosage of high-temperature hot water in the generator 4 can be effectively reduced by preheating the dilute solution before entering the generator 4, so that a transfer box 77 is arranged, the low-temperature dilute solution enters the transfer box 7 through a reaction liquid inlet 71, the high-temperature concentrated solution regenerated by the generator 4 enters the transfer box 7 through a regeneration liquid inlet 74, heat transfer occurs between the two, the dilute solution is preheated before entering the generator 4 and enters the generator 4 from a reaction liquid outlet 73, and meanwhile, the concentrated solution is precooled and enters an absorption reactor from the regeneration liquid outlet 72, 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 4, the dilute concentration reaction liquid exchanges heat with high-temperature steam in the generator 4, 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 4 and then enters the falling film absorber 2 again through the transfer box 7 for circulation. The high-temperature steam is reduced in temperature after heat exchange, becomes condensed water and flows out of the generator 4, can enter a heat supply pipeline for heat supply and can be used as a recovered water resource, and can also flow into the second spray pipe 27 of the falling film absorber 2. The secondary steam generated by heating the dilute concentration reaction liquid is discharged from the generator 4 and enters the heat exchanger to exchange heat with the boiler feed water 10 which is subjected to primary heating in the falling film 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, and the secondary steam flows out of the heat exchanger after being cooled as recovered water resources.

After the flue gas of the hot water boiler 1 is subjected to first-stage 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 4, so that the water supply 10 of the boiler or other process water is heated, and meanwhile, the recycled water resource is distilled water quality, so that the effect of drying the fuel is achieved, energy conservation and emission reduction can be realized, and the aim of energy cascade utilization is fulfilled.

In the technical scheme, the flue gas of the hot water boiler 1, fixed and continuous exhaust and the waste heat in the backwater of the heat supply network are recycled through various energy-saving devices to dry fuel, heat the boiler feed water 10 and the like, and meanwhile, the recycled water resource is distilled water quality and can be used for the boiler feed water 10, the water of the desulfurization device, the process liquid in the falling film absorption reactor 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 falling film pipe 25 can be effectively alleviated, the absorption of the multistage different functions is more efficient, 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 generating hot water or the like by the hot water boiler 1. The waste heat can be used for heating boiler feed water 10 or other process water and the like, and the process water is heated by two stages, namely, the primary heating of the falling film pipe 25 in the absorption reactor and the deep heating of the secondary steam generated by the generator 4, 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 hot water boiler 1.

It should be noted that, the industrial hot water boiler heating system 100 according to the embodiment of the present utility model is related to the flow and control of 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 pipelines in the industrial hot water boiler heating system 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. An industrial hot water boiler heating system, comprising: the hot water boiler is provided with a hearth, a first feeding port, a first smoke outlet, a first water outlet and a second water outlet, and the first feeding port, the first smoke outlet, the first water outlet and the second water outlet are all communicated with the hearth; one end of the thermal network pipe is communicated with the hot water boiler so that hot water generated by the hot water 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; the drying assembly is provided with a second feed inlet, a smoke inlet, a discharge outlet and a second smoke outlet, the second feed inlet is communicated with the fuel bin so that fuel flowing out of the fuel bin flows into the drying assembly, the smoke inlet is communicated with the first smoke outlet of the hot water boiler so that flue gas in the hot water boiler flows into the drying assembly to dry and heat the fuel, and the discharge outlet is communicated with the first feed inlet of the hot water boiler so that fuel dried by the drying assembly flows into the hot water boiler; a falling film absorber comprising an air inlet, a water inlet and a water outlet, wherein the air inlet is communicated with a second smoke outlet of the drying assembly so that the smoke flowing out of the drying assembly 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 hot water boiler so that the boiler feed water heated by the falling film absorber flows into the hot water boiler; the first heat exchanger comprises a first flow path and a second flow path which are independent and can perform heat exchange, the first flow path is communicated with the first water outlet so that waste water flowing out from the first water outlet of the hot water boiler flows into the first flow path, and the second flow path is suitable for being communicated with water so that the waste water in the first flow path heats water in the second flow path.

2. The industrial hot water boiler heating system of claim 1, further comprising a generator in communication with the second water outlet of the hot water boiler such that hot water exiting the second water outlet of the hot water boiler flows into the generator, the generator in communication with one end of the falling film absorber such that hot water within the generator heats the reaction liquid exiting the falling film absorber to concentrate the reaction liquid, the generator in communication with the other end of the falling film absorber such that the reaction liquid concentrated by the generator flows into the falling film absorber.

3. An industrial hot water boiler heating system according to claim 2, further comprising a second heat exchanger having a third flow path and a fourth flow path which are independent of each other and heat-exchangeable, both ends of the third flow path being respectively communicated with the hot water boiler and the water outlet so that water in the falling film absorber flows into the hot water boiler through the third flow path, and the fourth flow path being communicated with the generator so that secondary steam flowing out through the generator heats water in the third flow path through the fourth flow path.

4. An industrial hot water boiler heating system according to claim 2, wherein the falling film absorber comprises:

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

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

the first spray pipe is arranged in the shell and is located above the falling film pipe, the first spray pipe extends along the length direction of the shell, the first spray pipe is provided with a plurality of first spray openings with downward openings, the first spray openings extend along the extending direction of the first spray pipe, reaction liquid is introduced into the first spray pipe, so that the reaction liquid is sprayed on the peripheral surface of the falling film pipe through the first spray openings, and the reaction liquid absorbs heat and moisture of flue gas in the shell to heat boiler water in the falling film pipe.

5. The heating system of industrial hot water boiler according to claim 4, wherein the housing comprises a first housing and a second housing which are sequentially disposed in an up-down direction, the first housing has a first reaction chamber, the second housing has a second reaction chamber, the first reaction chamber and the second reaction chamber are independent of each other in the up-down direction, the first reaction chamber comprises a first chamber and a second chamber which are sequentially communicated in the up-down direction, the first shower pipe and the falling film pipe are disposed in the first chamber, the second chamber is for storing a reaction liquid flowing out through the first shower pipe, the air inlet is disposed on the second housing and is communicated with the second reaction chamber, the air inlet is disposed adjacent to a bottom of the second reaction chamber,

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

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

6. The heating system of an industrial hot water boiler according to claim 5, wherein the housing further has an air outlet formed at the top of the housing and communicating with the first reaction chamber so that the flue gas is discharged through the air outlet, and a gas-liquid separator provided in the air outlet so as to separate liquid in the flue gas flowing out through the air outlet.

7. An industrial hot water boiler heating system according to claim 5, wherein the generator is in communication with the water inlet of the falling film absorber such that water flowing out through the generator flows into the falling film absorber.

8. The industrial water heater heating system according to claim 5, further comprising a transfer box having a fifth flow path and a sixth flow path which are independent of each other and heat-exchangeable, both ends of the fifth flow path 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 fifth flow path, the sixth flow path being communicated with the generator so that the reaction liquid in the fifth flow path is heated through the sixth flow path by the reaction flowing out through the generator, the sixth flow path being communicated with the other end of the falling film absorber so that the reaction liquid flowing out through the sixth flow path flows into the falling film absorber.

9. An industrial hot water boiler heating system according to claim 5, further comprising a water treatment device in communication with the hot water boiler and the first flow path of the first heat exchanger, respectively, such that liquid exiting through the hot water boiler flows into the first flow path of the first heat exchanger through the water treatment device.

10. An industrial hot water boiler heating system according to claim 9, wherein the other end of the thermal network tube is in communication with the water treatment device so that water flowing out through the thermal network tube flows into the water treatment device.