阅读说明：本技术 一种大型燃煤电站液态排渣锅炉的新型防浮渣渣斗 (Novel anti-scum hopper of liquid-state slag discharging boiler of large coal-fired power plant ) 是由 周昊 孙叶柱 张海东 刘庆伏 李启明 刘涛 刘强 孙会亮 孟庆君 陈香保 张鹤 于 2020-06-10 设计创作，主要内容包括：本发明公开了一种大型燃煤电站液态排渣锅炉的新型防浮渣渣斗,包括渣斗本体,所述渣斗本体的内壁设置有普通浇注料保温层,且普通浇注料保温层的一侧外壁上着有刚玉保温层,所述渣斗本体的一侧外壁设置有废气管,所述渣斗本体的一侧外壁开设有倾斜的安装口,且安装口的内壁固定连接有渣池监视系统,所述渣斗本体的内壁开设有粒化水喷口,所述渣斗本体的一侧外壁开设有清渣入孔门,所述渣池监视系统包括移动导轨。本发明通过防止漏风、绝热保温来提升渣斗温度,强化了高温渣液的粒化效果,防止了渣室温度降低导致渣液凝固聚集浮渣甚至堵渣情况的发生。同时渣池监控系统以及清渣人孔门的增设增强了机组应对浮渣、堵渣情况的监控能力与处理能力。(The invention discloses a novel anti-scum slag hopper of a slag tapping boiler of a large coal-fired power plant, which comprises a slag hopper body, wherein the inner wall of the slag hopper body is provided with a common castable heat-insulating layer, a corundum heat-insulating layer is arranged on the outer wall of one side of the common castable heat-insulating layer, a waste gas pipe is arranged on the outer wall of one side of the slag hopper body, an inclined mounting opening is formed in the outer wall of one side of the slag hopper body, a slag pool monitoring system is fixedly connected to the inner wall of the mounting opening, a granulating water nozzle is formed in the inner wall of the slag hopper body, a slag-removing inlet door is formed in the outer wall of one side of the slag hopper body, and the. The invention improves the temperature of the slag hopper by preventing air leakage and heat insulation, strengthens the granulation effect of high-temperature slag liquid, and prevents the slag liquid from solidifying and gathering floating slag and even blocking slag caused by the temperature reduction of the slag chamber. Meanwhile, the slag pool monitoring system and the slag removal manhole door are additionally arranged, so that the monitoring capability and the processing capability of the unit for dealing with the conditions of scum and slag blockage are enhanced.)

1. A novel anti-scum slag hopper of a slag tapping boiler of a large coal-fired power plant comprises a slag hopper body (4) and is characterized in that a common castable heat-insulating layer (6) is arranged on the inner wall of the slag hopper body (4), a corundum heat-insulating layer (5) is arranged on the outer wall of one side of the common castable heat-insulating layer (6), a waste gas pipe (7) is arranged on the outer wall of one side of the slag hopper body (4), an inclined mounting port is arranged on the outer wall of one side of the slag hopper body (4), a slag pool monitoring system (12) is fixedly connected with the inner wall of the mounting port, a granulating water nozzle (11) is arranged on the inner wall of the slag hopper body (4), a scum clearing hole-entering door (13) is arranged on the outer wall of one side of the slag hopper body (4), the slag pool monitoring system (12) comprises a movable guide rail (14), a cold air sleeve is arranged on the inner wall of the, and one end of the installation pipe is fixedly connected with a monitoring lens (16), the other end of the installation pipe is fixedly connected with a signal collector (15), and the outer wall of one side of the movable guide rail (14) is fixedly connected with a connecting support (17).

2. The novel anti-floating slag bucket of the liquid slag discharging boiler of the large coal-fired power plant according to claim 1, characterized in that the slag bucket body (4) is connected with a slag bath (8), and the inner wall of the bottom of the slag bath (8) is fixedly connected with a slag dragging machine (9).

3. The novel anti-floating slag bucket of the slag tapping boiler of the large coal-fired power plant according to claim 1, characterized in that the slag bucket body (4) is connected with the slag tapping boiler (1) on the outer wall of the top part, burners (2) are arranged on both sides of the outer wall of the top part of the slag tapping boiler (1), and the slag tapping hole (3) is opened on the outer wall of the bottom part of the slag tapping boiler (1).

4. The novel anti-scum method for the slagging tap boiler of the large-scale coal-fired power plant according to claim 1, which comprises the following steps:

s1: by utilizing the characteristics of liquid slag discharge of an in-service large-scale coal-fired power generation liquid slag discharge boiler, a corundum heat-insulating pouring material capable of resisting the temperature of more than 1500 ℃ and a common pouring material are used to form a composite heat-insulating layer on the inner side of a slag hopper, so that on one hand, the slag hopper is prevented from leaking air, a waste gas pipe can generate stable negative pressure on the slag hopper, smoke is prevented from leaking to pollute a production site, slag liquid is prevented from solidifying and gathering into a slag pool to form floating slag due to the reduction of the temperature of the slag hopper, on the other hand, the heat-insulating layer also improves the temperature of a slag chamber, the temperature change rate of the slag liquid is increased when the slag liquid falls, is cooled and is granulated, the internal stress of the slag;

s2: the adopted composite heat-insulating layer can resist the high temperature of more than 1500 ℃, the temperature of slag liquid is more than 1300 ℃ due to the characteristic of a slag tapping boiler, most of conventional boiler casting materials are difficult to bear the high temperature for long-term baking, and therefore corundum is adopted as the inner container of the slag hopper composite heat-insulating layer, and the high environmental temperature can be effectively resisted;

s3: along with the temperature rise of the slag hopper, the temperature of the slag liquid can be kept higher before contacting with the granulating water, and when the granulating water rapidly cools the slag liquid, the stress in the slag liquid is greatly changed, so that the slag liquid is broken to form vitreous slag particles;

s4: the waste gas in the slag hopper is extracted by using the waste gas pipe so as to maintain the negative pressure of the slag hopper and discharge the waste gas in the slag hopper in time, and the composite heat-insulating layer is used for ensuring the sealing in the slag hopper and preventing air leakage;

s5: the slag bucket middle part has set up slag bath monitoring system, the operating personnel of being convenient for carry out real time monitoring to the slag bath liquid level, granulate water and high temperature slag liquid granulation effect to the slag bath and observe, guarantee that the operating personnel can control the dross condition, slag bath monitoring system has contained signal collector, moving guide, monitoring lens, cooling air, connection support etc. and forms, and slag bath monitoring system adjusts the distance that the camera lens got into the observation hole through moving guide, and the cooling air cools off the protection camera lens through the sleeve pipe to the camera lens and normally works.

5. The novel anti-floating slag method for the slagging tap boiler of the large-scale coal-fired power plant according to claim 4, characterized in that a slag removal manhole door is arranged in the middle of the slag hopper, when the scum and slag blockage occurs, the manhole door can be opened temporarily to clean the scum and slag blockage of the slag hopper, the slag removal manhole door is made of 310S heat-resistant stainless steel, and two layers of refractory heat-preservation pouring materials, namely corundum pouring materials and common pouring materials, are coated on the inner side of the manhole door.

6. The novel anti-floating slag method for the slagging boiler of the large-scale coal-fired power plant as claimed in claim 4, wherein the novel anti-floating slag hopper combines the granulation water, the exhaust gas pipe and the composite heat insulation layer, the composite heat insulation layer assists the exhaust gas pipe to maintain the negative pressure and the temperature of the slag, and the composite heat insulation layer strengthens the granulation effect of the granulation water, so that the granulation effect of the slagging boiler is further enhanced, and the scum situation is prevented.

Technical Field

The invention relates to the technical field of liquid slag discharging boilers of coal-fired power stations, in particular to a novel anti-scum hopper of a liquid slag discharging boiler of a large-scale coal-fired power station.

Background

The slag tapping boiler of the large coal-fired power plant melts the ash into a fluid state by utilizing higher hearth temperature, and catches the ash in the flue gas through the slag catching screen, so that most of the ash forms molten slag liquid and falls into a slag pool through a slag flowing port at the bottom of the furnace, thereby achieving the purpose of reducing the volume and the weight of the ash. However, due to the liquid slag discharging characteristic of the liquid slag discharging boiler, when high-temperature slag liquid enters the slag pool, scum is easily formed on the water surface of the slag pool along with the cooling of the slag liquid and the vaporization of cooling water of the slag pool, and when the scum is slowly accumulated, the slag liquid is prevented from smoothly falling into the slag pool, and finally a slag hopper is blocked, so that the safe operation of the boiler is seriously affected, and the problem which is urgently required to be solved by the liquid slag discharging boiler of the large-scale coal-fired power plant is solved. Therefore, the novel anti-scum hopper of the slag tapping boiler of the large coal-fired power plant is provided.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a novel anti-scum hopper of a slag tapping boiler of a large-scale coal-fired power plant.

The invention provides a novel anti-scum slag hopper of a slag tapping boiler of a large coal-fired power plant, which comprises a slag hopper body, wherein the inner wall of the slag hopper body is provided with a common castable heat preservation layer, a corundum heat preservation layer is arranged on the outer wall of one side of the common castable heat preservation layer, a waste gas pipe is arranged on the outer wall of one side of the slag hopper body, an inclined mounting opening is arranged on the outer wall of one side of the slag hopper body, the inner wall of the mounting opening is fixedly connected with a slag bath monitoring system, the inner wall of the slag hopper body is provided with a granulating water nozzle, the outer wall of one side of the slag hopper body is provided with a slag cleaning inlet door, the slag bath monitoring system comprises a movable guide rail, the inner wall of the movable guide rail is provided with a cold air sleeve, the inner wall of the cold air sleeve is connected with a mounting pipe in a sliding, and the outer wall of one side of the movable guide rail is fixedly connected with a connecting support.

Preferably, the slag hopper body is connected with a slag pool, and the inner wall of the bottom of the slag pool is fixedly connected with a slag dragging machine.

Preferably, the outer wall of the top of the slag bucket body is connected with a slag tapping boiler, burners are arranged on two sides of the outer wall of the top of the slag tapping boiler, and a slag flowing port is formed in the outer wall of the bottom of the slag tapping boiler.

A novel anti-scum method for a slag tapping boiler of a large coal-fired power plant comprises the following steps:

s1: by utilizing the characteristics of liquid slag discharge of an in-service large-scale coal-fired power generation liquid slag discharge boiler, a composite heat insulation layer is formed on the inner side of a slag hopper by using corundum heat insulation castable and common castable which can resist the temperature above the temperature, on one hand, the slag hopper is prevented from leaking air, so that a waste gas pipe can generate stable negative pressure on the slag hopper, smoke is prevented from leaking to pollute a production site, slag liquid is prevented from solidifying and gathering to fall into a slag pool to form floating slag due to the reduction of the temperature of the slag hopper, on the other hand, the heat insulation layer also improves the temperature change rate of the slag liquid when the slag liquid falls down, is cooled and granulated, correspondingly increases the internal stress of the slag liquid, improves the granulation efficiency of a granulating water nozzle on;

s2: the adopted composite heat-insulating layer can resist high temperature above the temperature, and due to the characteristics of the slag tapping boiler, the temperature of slag liquid is above about the temperature, most of conventional boiler casting materials are difficult to bear the high temperature for long-term baking, so corundum is adopted as the inner container of the slag hopper composite heat-insulating layer, and the high environmental temperature can be effectively resisted;

s3: along with the temperature rise of the slag hopper, the temperature of the slag liquid can be kept higher before contacting with the granulating water, and when the granulating water rapidly cools the slag liquid, the stress in the slag liquid is greatly changed, so that the slag liquid is broken to form vitreous slag particles;

s4: the waste gas in the slag hopper is extracted by using the waste gas pipe so as to maintain the negative pressure of the slag hopper and discharge the waste gas in the slag hopper in time, and the composite heat-insulating layer is used for ensuring the sealing in the slag hopper and preventing air leakage;

s5: the slag bucket middle part has set up slag bath monitoring system, the operating personnel of being convenient for carry out real time monitoring to the slag bath liquid level, granulate water and high temperature slag liquid granulation effect to the slag bath and observe, guarantee that the operating personnel can control the dross condition, slag bath monitoring system has contained signal collector, moving guide, monitoring lens, cooling air, connection support etc. and forms, and slag bath monitoring system adjusts the distance that the camera lens got into the observation hole through moving guide, and the cooling air cools off the protection camera lens through the sleeve pipe to the camera lens and normally works.

Preferably, the slag removal manhole door is arranged in the middle of the slag hopper, when scum and slag blocking occur, the manhole door can be opened temporarily to clean the scum and slag blocking of the slag hopper, the slag removal manhole door is made of S heat-resistant stainless steel, and the inner side of the manhole door is coated with two layers of refractory heat-preservation castable materials, namely corundum castable material and common castable material.

Preferably, the novel anti-scum slag hopper combines the granulating water, the waste gas pipe and the composite heat-insulating layer, the waste gas pipe is assisted by the composite heat-insulating layer to maintain the negative pressure and the temperature of the scum, and the granulating effect of the granulating water is enhanced by the composite heat-insulating layer, so that the granulating effect of the slag tapping boiler is further enhanced, and the scum situation is prevented.

The beneficial effects of the invention are as follows:

1. by using the corundum heat-insulating castable and the common castable which can bear the temperature of more than 1500 ℃, a composite heat-insulating layer is formed on the inner side of the slag hopper, on one hand, the slag hopper is prevented from leaking air, so that a waste gas pipe can generate stable negative pressure in the slag hopper, smoke is prevented from leaking to pollute a production site, slag liquid caused by temperature reduction of the slag hopper is prevented from solidifying, gathering and falling into a slag pool to form floating slag, on the other hand, the heat-insulating layer also improves the temperature of a slag chamber, so that the temperature change rate of the slag liquid is increased when the slag liquid falls, is cooled and granulated, the internal stress of the slag liquid is correspondingly increased, the granulating efficiency of a granulating water nozzle on. The slag bath monitoring system is additionally arranged, so that operators can conveniently monitor the liquid level of the slag bath in real time, the granulation water and the high-temperature slag liquid granulation effect of the slag bath are observed, and the operators can control the scum condition. Meanwhile, the slag removal manhole door is additionally arranged, when scum and slag blockage conditions occur, the manhole door can be temporarily opened, and scum and slag blockage of the slag bucket are cleaned.

2. The method utilizes the principle that the internal stress of high-temperature molten slag liquid can be rapidly lifted to cause slag blocks to be broken to form vitreous slag particles when the high-temperature molten slag liquid is quenched to form a vitreous body, enhances the suction effect of the waste gas pipe on the slag hopper by enhancing the air leakage prevention and the heat insulation of the slag hopper, strengthens the granulation effect of the high-temperature slag liquid, and prevents the slag liquid from solidifying and gathering scum and even blocking slag caused by the temperature reduction of a slag chamber. Meanwhile, a slag pool monitoring system and a slag removal manhole door are additionally arranged, so that the monitoring and processing capacity of the condition of scum blockage is enhanced.

3. The method solves the scum problem of the slag tapping boiler of the large coal-fired power plant, which is possibly caused by incomplete combustion or slag liquid viscosity-temperature characteristic change and the like, prevents the slag hopper from being blocked due to the scum problem, ensures the safe and temperature operation of the unit, and simultaneously eliminates the safety risk in clearing the blocked slag. Meanwhile, the bulk density of the granulated vitreous slag particles is higher than that of common ash, and the aim of reducing the volume and the quantity of the solid waste in the power plant is fulfilled. The adopted composite heat-insulating layer can resist the high temperature of more than 1500 ℃, the temperature of slag liquid is more than 1300 ℃ due to the characteristic of a slag tapping boiler, most of conventional boiler casting materials are difficult to bear the high temperature for long-term baking, and therefore, corundum is adopted as the inner container of the slag hopper composite heat-insulating layer, and the high environmental temperature can be effectively resisted. Meanwhile, the slag pool monitoring system and the slag removal manhole door are additionally arranged, so that the monitoring capability and the processing capability of the unit for dealing with the conditions of scum and slag blockage are enhanced.

Drawings

FIG. 1 is a schematic structural view of a novel anti-scum hopper of a slag tapping boiler of a large-scale coal-fired power plant according to the present invention;

fig. 2 is a schematic structural view of a slag bath monitoring system of a novel anti-scum hopper of a slag tapping boiler of a large-scale coal-fired power plant according to the present invention.

In the figure: the slag removal system comprises a slag tapping boiler 1, a combustor 2, a slag tapping port 3, a slag hopper body, a corundum heat insulation layer 5, a common castable heat insulation layer 6, a temperature measuring point 7, a slag pool 8, a slag salvaging machine 9, an exhaust pipe 10, a granulating water nozzle 11, a slag pool monitoring system 12, a slag removal manhole door 13, a moving guide rail 14, a signal collector 15, a monitoring lens 16 and a monitoring lens 17 which are connected and supported.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-2, a novel anti-scum slag hopper of a slag tapping boiler of a large-scale coal-fired power plant comprises a slag hopper body 4, wherein the inner wall of the slag hopper body 4 is provided with a common castable insulation layer 6, a corundum insulation layer 5 is arranged on the outer wall of one side of the common castable insulation layer 6, a waste gas pipe 7 is arranged on the outer wall of one side of the slag hopper body 4, an inclined mounting opening is arranged on the outer wall of one side of the slag hopper body 4, the inner wall of the mounting opening is fixedly connected with a slag bath monitoring system 12, the inner wall of the slag hopper body 4 is provided with a granulating water nozzle 11, a slag-cleaning hole door 13 is arranged on the outer wall of one side of the slag hopper body 4, the slag bath monitoring system 12 comprises a movable guide rail 14, the inner wall of the movable guide rail 14 is provided with a cold air sleeve, the inner wall of the cold air sleeve is, the outer wall of one side of the movable guide rail 14 is fixedly connected with a connecting support 17, a corundum heat-insulating layer is laid on the innermost side of the slag hopper and can resist high temperature of more than 1500 ℃, a temperature measuring point is used for monitoring the temperature of the slag hopper and preventing slag liquid from solidifying and blocking due to too low temperature of the slag hopper, the slag pool monitoring system adjusts the distance of a lens entering an observation hole through the movable guide rail, cooling air cools the lens through a sleeve to protect the lens to normally work, pulverized coal airflow enters the liquid boiler 1 through a combustor 2, and the pulverized coal airflow is vigorously combusted to form high-temperature slag liquid which is gathered near a slag discharge port 3 at the bottom of the furnace and flows out of the slag. Because the slag hopper is in a negative pressure state under the action of the waste gas pipe 10, the high-temperature flue gas and the slag liquid enter the slag hopper at the same time, namely, the slag liquid is sucked by the high-temperature flue gas to enter the slag hopper, so that the environment of the slag hopper is also improved, the improvement of the fluidity of the slag liquid is facilitated, and the slag liquid is ensured to smoothly enter the slag hopper. The slag liquid falls down after entering the slag hopper and is impacted by the granulating water flow, and is rapidly cooled to form a vitreous body, and simultaneously, the internal stress of the slag liquid is also rapidly increased due to rapid temperature change, so that the slag block is rapidly broken to form vitreous body slag particles, and the vitreous body slag particles fall into a slag pool 8 and are finally conveyed to a transfer station by a slag dragging machine 9. A large amount of water vapor can be generated in the secondary process, and the water vapor can be sucked to the front of the dust remover due to the action of the waste gas pipe 10, so that the scum blockage caused by the sudden temperature drop of the scum hopper can be prevented. The corundum heat-insulating pouring material and the common pouring material form a composite heat-insulating layer on the inner side of the slag hopper, so that on one hand, the slag hopper is prevented from leaking air to enable the waste gas pipe to generate stable negative pressure on the slag hopper, smoke is prevented from leaking to pollute a production site, and on the other hand, slag liquid is prevented from solidifying, gathering and falling into a slag pool to form floating slag due to temperature reduction of the slag hopper, on the other hand, the heat-insulating layer also improves the temperature of the slag hopper, so that the temperature change rate of the slag liquid is increased when the slag liquid falls, is cooled and granulated, the internal stress of the slag liquid is correspondingly increased, the granulating efficiency of the granulating water nozzle. The slag bath monitoring system 12 is additionally arranged, so that operators can conveniently monitor the liquid level of the slag bath 8 in real time, observe the granulating nozzles 11 of the slag bath and the granulating effect of high-temperature slag liquid, and ensure that the operators can control the scum condition. Meanwhile, a slag removal manhole door 13 is additionally arranged.

According to the slag removing device, a slag bucket body 4 is connected with a slag pool 8, the inner wall of the bottom of the slag pool 8 is fixedly connected with a slag salvaging machine 9, glass slag particles falling into the slag pool are accumulated at the bottom of the slag pool, are taken out of the slag pool through a scraper of the slag salvaging machine and are conveyed to a transfer station, the glass slag particles are processed by the transfer station, the outer wall of the top of the slag bucket body 4 is connected with a liquid slag removing boiler 1, burners 2 are arranged on two sides of the outer wall of the top of the liquid slag removing boiler 1, and a slag flowing port.

A novel anti-scum method for a slag tapping boiler of a large coal-fired power plant comprises the following steps:

s1: by utilizing the characteristics of liquid slag discharge of an in-service large-scale coal-fired power generation liquid slag discharge boiler, a corundum heat-insulating pouring material capable of resisting the temperature of more than 1500 ℃ and a common pouring material are used to form a composite heat-insulating layer on the inner side of a slag hopper, so that on one hand, the slag hopper is prevented from leaking air, a waste gas pipe can generate stable negative pressure on the slag hopper, smoke is prevented from leaking to pollute a production site, slag liquid is prevented from solidifying and gathering into a slag pool to form floating slag due to the reduction of the temperature of the slag hopper, on the other hand, the heat-insulating layer also improves the temperature of a slag chamber, the temperature change rate of the slag liquid is increased when the slag liquid falls, is cooled and is granulated, the internal stress of the slag;

s2: the adopted composite heat-insulating layer can resist the high temperature of more than 1500 ℃, the temperature of slag liquid is more than 1300 ℃ due to the characteristic of a slag tapping boiler, most of conventional boiler casting materials are difficult to bear the high temperature for long-term baking, and therefore corundum is adopted as the inner container of the slag hopper composite heat-insulating layer, and the high environmental temperature can be effectively resisted;

s3: along with the temperature rise of the slag hopper, the temperature of the slag liquid can be kept higher before contacting with the granulating water, and when the granulating water rapidly cools the slag liquid, the stress in the slag liquid is greatly changed, so that the slag liquid is broken to form vitreous slag particles;

s4: the waste gas in the slag hopper is extracted by using the waste gas pipe so as to maintain the negative pressure of the slag hopper and discharge the waste gas in the slag hopper in time, and the composite heat-insulating layer is used for ensuring the sealing in the slag hopper and preventing air leakage;

s5: the slag bucket middle part is provided with a slag pool monitoring system which is convenient for operators to monitor the liquid level of the slag pool in real time and observe the granulating effect of slag pool granulating water and high-temperature slag liquid and ensures that the operators can control the scum situation, the slag pool monitoring system comprises a signal collector, a movable guide rail, a monitoring lens, cooling air, a connecting support and the like, the slag pool monitoring system adjusts the distance of the lens entering an observation hole through the movable guide rail, the cooling air cools the lens through a sleeve to protect the lens to normally work, the slag removal manhole door is arranged in the middle of the slag bucket, when the scum and slag blocking situation occurs, the manhole door can be temporarily opened to clean the scum and slag blocking of the slag bucket, the slag removal manhole door is made of 310S heat-resistant stainless steel, the inner side of the manhole door is coated with corundum castable and common castable two-layer refractory heat-insulation castable, and the novel slag-proof bucket is used for monitoring the granulating water and the scum and high-temperature slag, The waste gas pipe and the composite heat-insulating layer are combined, the composite heat-insulating layer assists the waste gas pipe to maintain negative pressure and temperature of slag, and the granulation effect of granulating water is enhanced through the composite heat-insulating layer, so that the granulation effect of the slag tapping boiler is further enhanced, and the scum situation is prevented.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.