CN215061969U - System for cooling and utilizing waste heat of high-temperature pulverized coal burner - Google Patents

Abstract

The utility model discloses a system for cooling of high temperature pulverized coal burner and waste heat utilization, including combustor and boiler system, boiler system is connected respectively to the furnace of combustor and combustor rear end, boiler system, including two operation routes, wherein first operation route is connected with the combustor through the inlet line by softening the water tank, and the combustor is connected with the oxygen-eliminating device through going out steam conduit again, and second operation route is connected with the oxygen-eliminating device through going out steam conduit by the boiler section of thick bamboo on furnace top, first route and second route all are connected with the boiler through the oxygen-eliminating device, be equipped with the oxygen-eliminating pump on the inlet line that softening the water tank is connected with the oxygen-eliminating device, inside liquid level changer and the temperature transmitter of being equipped with of oxygen-eliminating device. The utility model discloses can carry out high-efficient cooling for the combustor to guarantee production safety, still can carry out recycle to the produced heat of combustor cooling vaporization simultaneously, thereby reach the purpose that improves the boiler productivity.

Description

System for cooling and utilizing waste heat of high-temperature pulverized coal burner

Technical Field

The utility model relates to a buggy industrial boiler technical field especially relates to a system of high temperature pulverized coal burner cooling and waste heat utilization.

Background

The high-efficiency low-NOx liquid slag-removing pulverized coal combustion technology is a combined technical route of sectional control, low excess air combustion, cyclone combustion, pulverized coal gasification combustion and the like in a high-heat load state in a pulverized coal burner, NOx generation is inhibited in the combustion process, the excellent characteristic of low NOx emission is finally achieved, and meanwhile liquid slag trapping is achieved in a combustion chamber of the pulverized coal burner. The coal powder burner is the key equipment of the technology, the working temperature of the combustion chamber is usually above 1500 ℃, the working environment of the furnace lining structure is abnormal and severe, the furnace lining structure is not only in the scouring environment of high temperature, strong reducing atmosphere and high-speed airflow for a long time, but also eroded by the slag directly contacted with the furnace lining, in order to realize the durable and stable work of the furnace lining, the effective method adopts the method of 'slag-resistant' to relieve the problem of the corrosion of the furnace lining, the core is to effectively cool the furnace lining of the burner, so that a layer of solid slag layer can be formed on the surface of the furnace lining, and the corrosion-resistant capability of the furnace lining is improved.

The deaerator of atmospheric thermal deaerator is widely used for water supply deaerating of industrial boiler, its working pressure is slightly higher than atmospheric pressure, generally controlled at 0.02MPa (gauge pressure), in order to guarantee the escaped gas to discharge the deaerator automatically. The heating steam required by the deaerator is directly supplied by a boiler drum, and the water in the deaerator is usually heated to 104 ℃ for thermal deaerating. The heating steam amount generally accounts for 10% -15% of the steam production amount of the boiler, and is an internal consumption process link of a boiler system, and high-grade steam is wasted.

When the liquid slag-removing pulverized coal industrial boiler operates, a furnace lining of a combustor needs to be effectively cooled, cooling water and the wall surface of a metal cylinder of the combustor continuously exchange heat to generate a large amount of normal-pressure saturated steam, the heat taken away by the normal-pressure saturated steam through vaporization cooling accounts for a large proportion of the total input heat of a boiler system, and the steam and the heat can greatly influence the stable operation condition of the combustor if reasonably utilized and directly concern the economic benefit of the operation of the boiler.

If the produced low-grade steam of combustor cooling process is used for the water heating heat energy in giving the oxygen-eliminating device, the required heating steam of oxygen-eliminating device not enough part just is provided by boiler drum high-grade steam, combine combustor cooling process and oxygen-eliminating device deoxidization process together ingeniously, realize that the energy keeps balance in the quantity, rationally match in the quality, just can solve boiler drum high-grade steam "big material is little" problem well, avoid the low-grade steam that combustor cooling vaporization produced to be difficult to utilize and the extravagant scheduling problem of heat. Meanwhile, the burner is vaporized and cooled under normal pressure, and the atmospheric thermal deaerator is directly connected with the burner through a water cooling jacket, so that the technical problem of poor pressurized safety performance of the jacket water cooling type burner is solved.

In the prior art, most pulverized coal burners are cooled by a water cooling method similar to that of a water cooling jacket directly connected with a deaerator, the outlet water temperature is controlled below 95 ℃, and the principle is as follows: the combustor outside is double-cylinder jacket cavity structure, leads to forced circulation's cooling water in double-cylinder jacket cavity structure, and the cooling water absorbs heat and takes away partly heat, and the continuous heat transfer of cooling water and metal cylinder wall produces a large amount of low-quality hot water, if the enterprise does not have the demand of rational utilization cooling water heat, these heats will scatter and disappear to the atmospheric space in, cause thermal pollution, reduced the thermal efficiency and also increased the cost of enterprise.

If the normal pressure water vaporization cooling mode is adopted for cooling the pulverized coal burner, the temperature of the outlet water is increased to the boiling point, the boiling water cannot influence the cooling function of the burner, and low-pressure steam cannot be generated. Because the specific heat of water and the numerical value of latent heat of vaporization of water are greatly different, the water quantity required by water cooling is far higher than that required by vaporization cooling when no phase change occurs, and for the same cooling system, the difference between the specific heat of water and the numerical value of latent heat of vaporization of water is 7-8 times. The steam generated by vaporization cooling can directly enter an atmospheric thermal deaerator, soft water and the steam in the deaerator are fully mixed to reach the saturation temperature of the deaerator under the rated pressure, and air separated from the water is discharged into the atmosphere from the top of the deaerator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a system of high temperature pulverized coal burner cooling and waste heat utilization, through utilizing the production safety of vaporization cooling mode in order to guarantee the combustor, still can carry out recycle to the produced heat of cooling vaporization simultaneously to improve the productivity problem of boiler.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a system for cooling a high-temperature pulverized coal burner and utilizing waste heat comprises the burner and a boiler system, wherein a hearth at the rear ends of the burner and the burner are respectively connected with the boiler system,

the boiler system comprises two operation routes, wherein the first operation route is connected with a burner through a water inlet pipeline by a softening water tank, the burner is connected with a deaerator through a steam outlet pipeline, the second operation route is connected with the deaerator through a steam outlet pipeline by a boiler barrel at the top end of a hearth, the first route and the second route are both connected with a boiler through the deaerator,

a water inlet pipeline connected with the softening water tank and the deaerator is provided with an oxygen removal pump, the softening water tank is connected with external softened water,

a liquid level transmitter and a temperature transmitter are arranged in the deaerator,

in the first operation route, a cooling water pump and a check valve are sequentially arranged on a water inlet pipeline between the softened water tank and the combustor, in the second operation route, a steam valve is arranged on a steam outlet pipeline between the boiler barrel and the deaerator, a safety valve is arranged on the top side of the deaerator, a water opening valve is arranged on the bottom side of the deaerator, and the water opening valve is connected with the boiler through a water feeding pump.

Further, the combustor includes combustion chamber and burner, the combustion chamber is connected in the burner, the combustion chamber includes outer cylinder, cooling module, furnace lining, terminal surface and combustion chamber rear end face before the combustion chamber, the burner is connected to the terminal surface before the combustion chamber, the one end that the burner was kept away from to the combustor is the combustion chamber rear end face, the outer wall of combustion chamber is equipped with the furnace lining, and the periphery of furnace lining still is equipped with the outer cylinder, be equipped with cooling module between outer cylinder and the furnace lining.

Furthermore, the cooling component comprises an inner wall surface, an outer wall surface and a jacket layer formed by the inner wall surface and the outer wall surface, an upper electrode point and a lower electrode point are arranged in the jacket layer, the cooling component is arranged in the outer cylinder and is coaxial with the outer cylinder, the jacket layer is respectively provided with a steam outlet and a cooling water inlet which penetrate out of the outer cylinder, the jacket layer is connected with a water inlet pipeline of a first operation route through the cooling water inlet and is connected with a steam outlet pipeline of the first operation route through the steam outlet, and a heat conduction filler is arranged between the inner wall surface of the cooling component and the furnace lining.

Further, the burner comprises a fire observation pipeline, a secondary air inlet, a horn body, a primary air/pulverized coal pipe, a blunt body, an igniter, a shell and a secondary air pipeline, wherein the burner is respectively connected with the secondary air pipeline of the burner and the inlet end face of a combustion chamber through the shell, the blunt body, the igniter and the horn body are arranged in the shell, the small round end of the horn body is connected with the primary air/pulverized coal pipe penetrating through the shell, the large round end of the horn body is connected with the inlet end face of the combustion chamber, the primary air/pulverized coal pipe is communicated with the combustion chamber through the horn body, the blunt body is arranged at the outlet of the primary air/pulverized coal pipe, the horn body is provided with the secondary air inlet, the horn body is connected with the igniter penetrating through the shell, and the horn body is connected with the fire observation pipeline penetrating through the shell.

Furthermore, a slag falling pipe is arranged in the hearth, and a slag discharging machine is arranged below the slag falling pipe.

The utility model has the advantages that: the boiler system can carry out high-efficient cooling for the combustor to guarantee production safety, still can carry out recycle to the produced heat of combustor cooling vaporization simultaneously, thereby reach the purpose that improves boiler productivity.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the burner of the present invention;

FIG. 3 is a flow chart of the automatic control of the liquid level of the burner according to the present invention;

FIG. 4 is a flow chart of the automatic control of the deaerator temperature of the present invention;

fig. 5 is the flow chart of the automatic control of the liquid level of the deaerator of the utility model.

In the figure: a burner 10, a deaerator 11, a boiler barrel 12, a softening water tank 13, a cooling water pump 14, a check valve 15, a deaerating pump 16, a 17-way water valve, a water outlet 18, a safety valve 19, a liquid level transmitter 20, a temperature transmitter 21, a slag falling pipe 22, a slag discharging machine 23, a hearth 24, a steam valve 25 and a water feeding pump 26,

a combustion chamber 100, an outer cylinder 101, an outer wall surface 102, an inner wall surface 103, a jacket layer 104, a furnace lining 105, a combustion chamber rear end surface 106, a combustion chamber front end surface 107, a steam outlet 108, a cooling water inlet 109, an upper electrode point 110 and a lower electrode point 111,

the device comprises a burner 200, a secondary air inlet 201, a fire observation pipeline 202, a horn body 203, a primary air/pulverized coal pipe 204, a blunt body 205, an igniter 206, a shell 207 and a burner secondary air pipeline 208.

Detailed Description

The present invention will be described in detail and with particular reference to the accompanying drawings, which are provided for a better understanding of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 5, a system for cooling and utilizing waste heat of a high-temperature pulverized coal burner comprises a burner 10 and a boiler system, wherein a furnace 24 at the rear end of the burner 10 and a furnace 24 at the rear end of the burner 10 are respectively connected with the boiler system, and the boiler system can efficiently cool the burner 10 to ensure production safety, and simultaneously can recycle heat generated by cooling and vaporizing the burner 10, thereby achieving the purpose of improving the capacity of the boiler.

Boiler system, including two operation routes, wherein first operation route is connected with combustor 10 through the pipeline of intaking by softening water tank 13, and combustor 10 is connected with oxygen-eliminating device 11 through a steam outlet pipe again, and second operation route is connected with oxygen-eliminating device 11 through a steam outlet pipe by boiler barrel 12 at 24 tops of furnace, first route and second route all are connected with the boiler through oxygen-eliminating device 11, and the steam of inputing in the oxygen-eliminating device 11 supplies the boiler operation after oxygen-eliminating device 11 deoxidization in follow first operation route and the second operation route, boiler barrel 12 loads and carries cold water.

And the other water inlet pipeline of the softened water tank 13 connected with the deaerator 11 is provided with a deaerating pump 16, and the softened water tank 13 is connected with external softened water.

In the first operation route, a cooling water pump 14 and a check valve 15 are sequentially arranged on a water inlet pipeline between the softening water tank 13 and the combustor 10, and in the second operation route, a steam outlet pipeline between the boiler barrel 12 and the deaerator 11 is provided with a steam valve 25.

The top side of the deaerator 11 is provided with a safety valve 19, the bottom side is provided with a water opening valve 17, and the water opening valve 17 is connected with the boiler through a feed pump 26.

And a liquid level transmitter 20 and a temperature transmitter 21 are arranged inside the deaerator 11.

Combustor 10, including combustion chamber 100 and burner 200, combustion chamber 100 is connected in burner 200, combustion chamber 100, including outer cylinder 101, cooling assembly, furnace lining 105, the preceding terminal surface 107 of combustion chamber and combustion chamber rear end face 106, end surface 107 connects burner 200 before the combustion chamber, combustor 10 keeps away from the one end of burner 200 and is combustion chamber rear end face 106, the outer wall of combustion chamber 100 is equipped with furnace lining 105, and the periphery of furnace lining 105 still is equipped with outer cylinder 101, be equipped with cooling assembly between outer cylinder 101 and the furnace lining 105.

The cooling assembly comprises an inner wall surface 103, an outer wall surface 102 and a jacket layer 104 formed by the inner wall surface 103 and the outer wall surface 102, an upper electrode point 110 and a lower electrode point 111 are arranged in the jacket layer 104, the cooling assembly is arranged in the outer cylinder 101 and is coaxial with the outer cylinder, and the jacket layer 104 is respectively provided with a steam outlet 108 and a cooling water inlet 109 which penetrate out of the outer cylinder 101.

And a heat conduction filler is arranged between the inner wall surface 103 of the cooling assembly and the furnace lining 105.

The jacket layer 104 is connected to the water inlet line of the first operating path via a cooling water inlet 109 and to the steam outlet line of the first operating path via a steam outlet 108.

The oxygen-eliminating device 11 is an atmospheric thermal oxygen-eliminating device 11, can use steam to supply water heating, improve the temperature of water, make the partial pressure of steam on the surface of water increase gradually, and the partial pressure of dissolved gas then reduces gradually, and the gas of dissolving in the aquatic just constantly escapes, when the boiling temperature of water under being heated to corresponding pressure, all be water vapor on the surface of water, and the partial pressure of dissolved gas is zero, and water no longer has the ability of dissolved gas, and aquatic oxygen just constantly escapes, reaches the effect of deoxidization.

The water from which oxygen is removed, also called deoxygenated water, is used for boiler feed water in order to prevent oxygen corrosion of the boiler.

The burner 200 comprises a fire observation pipeline 202, a secondary air inlet 201, a horn body 203, a primary air/pulverized coal pipe 204, a bluff body 205, an igniter 206, a shell 207 and a secondary air pipeline 208, the burner 200 is connected with the burner secondary air channel 208 and the combustion chamber inlet end face 107 through the casing 207 respectively, a blunt body 205, an igniter 206 and a horn 203 are arranged in the shell 207, a primary air/pulverized coal pipe 204 penetrating through the shell is connected with the small round end of the horn 203, the big round end of the horn body 203 is connected with the inlet end face 107 of the combustion chamber, the primary air/pulverized coal pipe 204 is communicated with the combustion chamber 100 through the horn body 203, a blunt body 205 is arranged at the outlet of the primary air/pulverized coal pipe 204, a secondary air inlet 201 is arranged on the horn body 203, an igniter 206 is connected to the horn 203 and penetrates through the housing 207, and a fire observation pipeline 202 penetrates through the housing 207 and is connected to the horn 203.

A slag falling pipe 22 is arranged in the hearth 24, and a slag discharging machine 23 is arranged below the slag falling pipe 22.

The utility model discloses a use method, including following step:

s1: when the boiler operates, the cooling water pump 14 is started, water in the softened water tank 13 is driven by the cooling water pump 14 and the oxygen removal pump 16, one path of water flows into a cooling assembly of the combustor 10 through the cooling water pump 14 to cool the combustor 10, and the other path of water flows into the oxygen removal device 11 through the oxygen removal pump 16;

s2: under the regulation and control of the cooling water pump 14, cooling water flows into a jacket layer of the cooling assembly, high-temperature heat generated by the combustor 10 is transmitted into the jacket layer through a furnace lining, a heat-conducting filler and an inner wall surface to heat the cooling water, the cooling water flows in the jacket layer and exchanges heat with the jacket layer to form high-temperature water, the high-temperature water gradually reaches a saturated state, then sufficient heat is absorbed in the jacket layer to form steam, and the steam is sent into the deaerator 11;

s3, the deaerator 11 performs a deaerating action by using the steam, and finally obtained boiler feed water is sent to a boiler steam-water system through a deaerating water outlet for use.

In the step S2, the amount of cooling water in the combustor 10 is realized by controlling the cooling water pump 14, and in order to ensure the safe operation of the combustor, an electrode point is provided in the jacket layer of the cooling assembly, and the electrode point is divided into an upper electrode point 110 and a lower electrode point 111, and when the upper electrode point 110 contacts the cooling water, a water reducing signal is sent out, and when the lower electrode point 111 receives a steam signal, a water replenishing signal is sent out, so as to ensure that the liquid level in the combustor is always within a set interval.

In step S3, be equipped with liquid level transmitter 20 in the oxygen-eliminating device 11, it sets for that the liquid level interval is that oxygen-eliminating device 11 work required liquid level interval, and can guarantee that oxygen-eliminating device 11 liquid level keeps in oxygen-eliminating device 11 work required liquid level interval, be equipped with liquid level transmitter 20 in the oxygen-eliminating device 11, when the liquid level exceedes the highest value of setting for, liquid level transmitter 20 can give delivery port 18 and remove oxygen pump 16 signal of reducing water, when the liquid level is less than the lowest value of setting for, liquid level transmitter 20 can give except that oxygen pump 16 moisturizing signal, guarantee with this that the interior liquid level of oxygen-eliminating device 11 is setting for the interval all the time.

In step S3, a temperature transmitter 21 is disposed in the deaerator 11, and the set temperature range is a temperature range required by the deaerator 11 to work, and it can be ensured that the temperature of the deaerator 11 is kept within the temperature range required by the deaerator 11 to work. Be equipped with temperature transmitter 21 in the oxygen-eliminating device 11, when the temperature exceeded the maximum value of settlement, temperature transmitter 21 can give steam valve 25 temperature reduction signal, and when the liquid level was less than the minimum value of settlement, temperature transmitter 21 can give steam valve 25 intensification signal to this temperature is guaranteeing that the temperature is in setting for the interval all the time in the oxygen-eliminating device 11.

In the step S3, the deaerator 11 is provided with the safety valve 19, the set pressure in the deaerator 11 is 0.02MPa (gauge pressure), and when the pressure in the deaerator 11 is higher than the set pressure, the safety valve 19 is opened, so as to ensure that the internal pressure of the deaerator 11 is always kept at 0.02MPa (gauge pressure).

The working principle is as follows: the utility model discloses realize the cooling heat dissipation of combustor 10 and to its high quality utilization of energy production: the combustor 10 is cooled by an evaporative cooling method, cooling water flows in a high-temperature jacket layer and exchanges heat with the high-temperature jacket layer to form high-temperature cooling water, the high-temperature cooling water gradually reaches a saturated state, and then sufficient heat is absorbed in the jacket layer to become steam which is then sent to a deaerator 11.

The liquid level of the combustor 10 is realized by controlling a cooling water pump 14 for supplying water to the combustor 10, the liquid level and steam are set according to the comparison of signals obtained by electrode points in a jacket layer 104 of the combustor 10, when a lower electrode point 111 receives a steam signal, the water supply amount of the cooling water pump 14 is increased, and when the storage amount is the lowest, the minimum liquid level required by the combustor 10 is reached; when the upper pole 110 receives the cooling water signal, the water supply amount of the cooling water pump 14 is reduced, and the maximum liquid level in the jacket layer 104 of the combustor 10 reaches the minimum space required by the combustor jacket layer 104 to generate steam.

The liquid level on the jacket layer of the combustor 10 is controlled to be about 50% of the actual liquid level which can be contained in the jacket layer of the combustor, so that the problems that the water level is too low and the water supplement is not timely, the steam generation amount can be rapidly accelerated, the cooling effect is poor, even an explosion accident occurs, or the water level is too high, the space required by steam is generated by compression, the generation of the steam can be influenced, the saturated water amount of the generated steam is large, and the steam quality is influenced.

The deaerator 11 is provided with a liquid level transmitter 20, the maximum value of which is the maximum value of the liquid which can be contained in the deaerator 11, and the value of which is ensured not to exceed the maximum containing value of the drum 12.

The liquid level of the deaerator 11 is realized by controlling a deaerating pump 16 for supplying water to the deaerator 11, the set liquid level is compared according to the liquid level measured by the liquid level transmitter 20, the water supply quantity of the deaerating pump 16 is increased when the set liquid level is lower than the set liquid level, and the minimum liquid level required by the deaerator 11 is reached when the storage quantity is the lowest; above the set level, the amount of water supplied by the oxygen pump 16 is reduced and excess water is drained from the water outlet 18.

The deaerator 11 is provided with a temperature transmitter 21, and the temperature setting interval of the temperature transmitter is an optimal temperature interval required by the deaerator 11 and ensures that the value of the temperature transmitter is kept in the optimal temperature interval required by the deaerator 11.

The temperature of the deaerator 11 is realized by controlling a steam valve 25 for introducing steam into the deaerator 11 to the drum 12, a set temperature interval is compared according to the measured temperature, and when the temperature is lower than the set temperature interval, the amount of the steam introduced into the drum 12 is increased; when the temperature is higher than the set temperature interval, the steam amount introduced into the drum 12 is reduced.

Be equipped with relief valve 19 in the oxygen-eliminating device 11, set pressure is 0.02MPa (gauge pressure) in the oxygen-eliminating device 11, and when 11 internal pressure in the oxygen-eliminating device was higher than the set value, relief valve 19 will open and carry out the pressure release to this guarantees that 11 internal pressure in the oxygen-eliminating device remain at 0.02MPa (gauge pressure) all the time.

The utility model discloses can absorb the characteristics of a large amount of heat energies when looking at water vaporization to and the inside characteristic that can keep the ordinary pressure of atmosphere formula heating power oxygen-eliminating device 11, required refrigerated water yield when reducing the cooling guarantees combustor 10's work safety, provides the required steam of 11 deoxidations of oxygen-eliminating device, reaches the effect of the high-efficient utilization of heat energy.

The utility model discloses produced saturated water produces the steam that is used for the deoxidization when utilizing combustor 10 to cool off, equipment simple process, make full use of the radiating energy of combustor 10, effectively improved energy utilization, the energy of cooling combustor 10 directly is arranged in producing, has improved the energy utilization and has worth. The combustor 10 adopts high-temperature low-oxygen cyclone combustion and air classification air distribution, can effectively reduce pollution emission, and has significant significance for energy conservation and emission reduction of boilers.

The above description is only for the detailed description of the embodiments of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (5)

1. The utility model provides a system for cooling of high temperature pulverized coal combustor and waste heat utilization, includes combustor (10) and boiler system, boiler system is connected respectively in furnace (24) of combustor (10) and combustor (10) rear end, its characterized in that:

the boiler system comprises two operation routes, wherein the first operation route is connected with a burner (10) through a water inlet pipeline by a softening water tank (13), the burner (10) is connected with a deaerator (11) through a steam outlet pipeline, the second operation route is connected with the deaerator (11) through a steam outlet pipeline by a boiler barrel (12) at the top end of a hearth (24), the first route and the second route are both connected with a boiler through the deaerator (11),

a water inlet pipeline connected with the water softening tank (13) and the deaerator (11) is provided with a deaerating pump (16), the water softening tank (13) is connected with external softened water,

a liquid level transmitter (20) and a temperature transmitter (21) are arranged in the deaerator (11),

in the first operation route, a cooling water pump (14) and a check valve (15) are sequentially arranged on a water inlet pipeline between a softening water tank (13) and a combustor (10), in the second operation route, a steam valve (25) is arranged on a steam outlet pipeline between a boiler barrel (12) and a deaerator (11), a safety valve (19) is arranged on the top side of the deaerator (11), a water opening valve (17) is arranged on the bottom side of the deaerator (11), and the water opening valve (17) is connected with a boiler through a water feeding pump (26).

2. The system for cooling and utilizing the waste heat of the high-temperature pulverized coal burner as claimed in claim 1, wherein: combustor (10), including combustion chamber (100) and burner (200), combustion chamber (100) are connected in burner (200), combustion chamber (100) are including outer cylinder (101), cooling assembly, furnace lining (105), terminal surface (107) and combustion chamber rear end face (106) before the combustion chamber, burner (200) are connected to terminal surface (107) before the combustion chamber, the one end that burner (200) were kept away from in combustor (10) is combustion chamber rear end face (106), the outer wall of combustion chamber (100) is equipped with furnace lining (105), and the periphery of furnace lining (105) still is equipped with outer cylinder (101), be equipped with cooling assembly between outer cylinder (101) and furnace lining (105).

3. The system for cooling and utilizing the waste heat of the high-temperature pulverized coal burner as claimed in claim 2, wherein: the cooling assembly comprises an inner wall surface (103), an outer wall surface (102) and a jacket layer (104) formed by the inner wall surface (103) and the outer wall surface (102), wherein an upper electrode point (110) and a lower electrode point (111) are arranged in the jacket layer (104), the cooling assembly is arranged in an outer cylinder (101) and is coaxially arranged with the outer cylinder, the jacket layer (104) is respectively provided with a steam outlet (108) and a cooling water inlet (109) which penetrate out of the outer cylinder (101), the jacket layer (104) is connected with a water inlet pipeline of a first operation route through the cooling water inlet (109) and is connected with a steam outlet pipeline of the first operation route through the steam outlet (108), and a heat conduction filler is arranged between the inner wall surface (103) of the cooling assembly and a furnace lining (105).

4. The system for cooling and utilizing the waste heat of the high-temperature pulverized coal burner as claimed in claim 2, wherein: the burner (200) comprises a fire observation pipeline (202), a secondary air inlet (201), a horn body (203), a primary air/pulverized coal pipe (204), a bluff body (205), an igniter (206), a shell (207) and a secondary air pipeline (208), the burner (200) is respectively connected with the secondary air pipeline (208) of the burner and an inlet end face (107) of a combustion chamber through the shell (207), the shell (207) is internally provided with the bluff body (205), the igniter (206) and the horn body (203), the small round end of the horn body (203) is connected with the primary air/pulverized coal pipe (204) penetrating through the shell, the large round end of the horn body (203) is connected with the inlet end face (107) of the combustion chamber, the primary air/pulverized coal pipe (204) is communicated with the combustion chamber (100) through the horn body (203), the outlet of the primary air/pulverized coal pipe (204) is provided with the bluff body (205), the horn body (203) is provided with a secondary air inlet (201), the horn body (203) is connected with an igniter (206) penetrating through the shell (207), and the horn body (203) is connected with a fire observation pipeline (202) penetrating through the shell (207).

5. The system for cooling and utilizing the waste heat of the high-temperature pulverized coal burner as claimed in claim 1, wherein: a slag falling pipe (22) is arranged in the hearth (24), and a slag discharging machine (23) is arranged below the slag falling pipe (22).

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