Slag cooling system with heat recovery mechanism

Abstract

The utility model discloses a slag cooling system with a heat recovery mechanism, which comprises a dry type slag remover and a slag cooling hopper which is arranged on the dry type slag remover and is used for enabling ash to fall into the dry type slag remover to be conveyed, and a sealing mechanism which is used for sealing the interior of the dry type slag remover is arranged in the slag cooling hopper. A coke extruding mechanism used for crushing falling residual slag blocks is arranged in the slag cooling hopper, a monitoring mechanism used for monitoring ash in the dry type slag remover is arranged on the dry type slag remover, and the sealing mechanism comprises an execution assembly, a sealing assembly and a control assembly. A closing door used for opening and closing the dry type slag remover is installed at an outlet in the lower end of the interior of a slag cooling hopper, a first servo oil cylinder used for driving the closing door to be opened and closed is installed between the slag cooling hopper and the closing door, and the problems that the amount and the state of ash in the slag cooling hopper cannot be monitored, the coking and slag blocking phenomena are likely to be caused, and the slag cooling hopper is damaged are solved. And in the slag discharging process of the cold slag hopper, the phenomenon that the instant ash amount is too large and the dry type slag remover is blocked is easily caused.

Description

Technical Field

[0001] The utility model relates to the technical field of slag removers, in particular to a slag cooling system with a heat recovery mechanism. Background Art

[0002] The operation mode of the dry slag remover system is as follows: the hot ash falls into the dry slag remover through the cold slag bucket (empty) for transportation. During the transportation process, the ash exchanges heat with the air (furnace negative pressure suction air). After the ash is cooled, it enters the slag crusher for crushing, and then enters the slag storage bin for storage;

[0003] After checking the public (announcement) number: CN210165406U, a cooling device for a slag remover and a slag remover are disclosed. This technology discloses technical solutions such as "a sealed box provides a relatively closed space for the transportation part of the slag remover, uses air as a cooling medium, and drives the heat of the slag to be transferred to the outside of the sealed box through gas flow", which has technical effects such as "realizing rapid cooling of the slag, replacing wet cooling, reducing the moisture content of the slag, improving the storage capacity of the slag storage box, reducing landfill costs, and avoiding the safety hazard of slag explosion when it encounters water";

[0004] Under normal operation, the cold slag hopper is empty and the shutoff door is fully open. If the dry slag remover (or subsequent equipment) fails, the shutoff door is closed to repair the equipment, and the ash is temporarily stored in the cold slag hopper. Taking a 600MW boiler as an example, under normal operation, due to the negative pressure of the furnace of about -50Pa, the air leakage from the dry slag removal system into the furnace reaches about 30,000m3 / h, accounting for 2% of the boiler combustion air volume. This leakage temperature is low, which will increase the coal consumption of the boiler, and at the same time will cause the upward shift of the boiler flame center, causing the exhaust gas temperature to rise;

[0005] In addition, the shut-off door of the cold slag hopper on a conventional dry slag remover is usually operated manually, and the amount and status of ash in the cold slag hopper cannot be monitored, which can easily cause coking and slag blockage. During the slag discharge process of the cold slag hopper, it is easy to cause an instantaneous excessive amount of ash and slag, which can block and stop the dry slag remover. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a slag cooling system with a heat recovery mechanism, which has the characteristics of monitoring and analyzing the ash shape, form, slag temperature, heat release and thermal field of the slag hopper in the cold slag hopper, judging and analyzing the automatic opening of the shut-off door and slag discharge to reduce the boiler air leakage (reduce the boiler coal consumption).

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a slag cooling system with a heat recovery mechanism, including a dry slag remover and a cold slag bucket arranged on the dry slag remover for slag to fall into the dry slag remover for transportation, the cold slag bucket is provided with a sealing mechanism for sealing the inside of the dry slag remover, the cold slag bucket is provided with a coke squeezing mechanism for crushing the residual slag blocks that fall into the dry slag remover, the dry slag remover is provided with a monitoring mechanism for monitoring the slag inside the dry slag remover, and the sealing mechanism includes:

[0008] The actuator assembly includes a shutoff door installed at the lower end outlet of the cold slag bucket for opening and closing the dry slag remover, a first servo oil cylinder for driving the shutoff door to open and close is installed between the cold slag bucket and the shutoff door, and a sealing sleeve for improving sealing is installed between the cold slag bucket and the shutoff door;

[0009] The cooling air component comprises an air duct connected to the shut-off door for supplying air, and the other end of the air duct is connected to a fan for supplying air to the shut-off door, and a hood for promoting air circulation is installed on the shut-off door.

[0010] Preferably, the coke squeezing mechanism includes coke squeezing doors installed on both sides of the lower end of the dry slag remover and used to crush the residual slag blocks that fall into the machine, and a second servo cylinder for driving the coke squeezing door to move is installed between the cold slag bucket and the coke squeezing door.

[0011] Preferably, the monitoring mechanism includes a thermal imager installed above the cold slag hopper and used to monitor the ash inside the dry slag remover, a mounting bracket for installing the thermal imager, a fixing seat welded and fixed to the mounting bracket, an adjustment seat rotatably mounted with the fixing seat and used for angle adjustment, and a mounting seat welded and fixed to the adjustment seat for fixed installation on the cold slag hopper.

[0012] Preferably, the monitoring mechanism also includes a connecting frame arranged inside the adjusting seat to avoid interference with the connecting shaft of the adjusting seat and the fixed seat, a guide rod slidably installed at the lower end of the adjusting seat and fixed to the connecting frame and used for guiding, a tooth head fixed on the connecting frame for fixing the angle of the adjusting seat and the fixed seat, and a spring sleeved on the guide rod.

[0013] Preferably, the monitoring mechanism further comprises a button head which is slidably mounted on the upper end of the adjusting seat and fixed to the connecting frame and used for adjustment.

[0014] Preferably, the monitoring mechanism further comprises a plurality of tooth grooves which are arranged on the circumference of the inner wall of the fixing seat and are used for adjusting different angles.

[0015] Beneficial Effects

[0016] The utility model provides a slag cooling system with a heat recovery mechanism. Compared with the prior art, it has the following beneficial effects:

[0017] (1) The monitoring mechanism monitors the ash removal in the cold slag hopper and issues instructions to the first servo cylinder through the DCS system. The first servo cylinder can achieve high-precision control according to the instructions of the DCS system, and accurately control the opening of the shut-off door and the amount of slag discharge. Since the shut-off door is a closed wind chamber and is equipped with a hood, the fan supplies air to the shut-off door through the air duct. The air source can come from the furnace above the shut-off door, or from the slag bin and the natural atmosphere. Under the action of the cooling air, the surface of the ash in the cold slag hopper is quickly cooled to prevent the high-temperature ash from sticking together and causing slag blockage.

[0018] (2) Through the thermal imaging analysis software, the height, shape and temperature of the ash in the cold slag hopper can be intuitively observed to avoid the temperature process in a certain concentrated area and the phenomenon of large coke formation; and through the thermal imaging analysis software, the slag discharge of the cold slag hopper can be automatically controlled to avoid the dry slag removal machine being blocked due to the failure of human control of the slag discharge in time and the excessive amount of slag in an instant; the thermal imager is used to make an algorithm to judge the situation of the slag falling and the slag falling on the shut-off door, the temperature drop, the heat dissipation, whether it has formed coke, etc., so as to decide the situation of opening and closing the door, and avoid the falling slag from forming coke on the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the monitoring mechanism in the utility model;

[0020] Figure 2 It is a schematic diagram of the planar structure of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the adjustment seat in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the fixing seat in the utility model;

[0023] In the figure: 1. dry slag remover; 2. cold slag bucket; 3. sealing mechanism; 31. actuator; 311. shut-off door; 312. first servo cylinder; 313. sealing sleeve; 32. cooling air assembly; 321. air duct; 322. fan; 323. wind hood; 5. coke squeezing mechanism; 51. coke squeezing door; 52. second servo cylinder; 6. monitoring mechanism; 61. thermal imager; 62. mounting bracket; 63. fixing seat; 64. adjusting seat; 65. mounting seat; 641. connecting bracket; 642. guide rod; 643. button head; 644. tooth head; 645. spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution of a slag cooling system with a heat recovery mechanism: a slag cooling system with a heat recovery mechanism, comprising a dry slag remover 1 and a cold slag bucket 2 arranged on the dry slag remover 1 for slag to fall into the dry slag remover 1 for transportation, a sealing mechanism 3 for sealing the inside of the dry slag remover 1 is arranged in the cold slag bucket 2, a coke squeezing mechanism 5 for crushing the residual slag blocks that fall into the cold slag bucket 2 is arranged, a monitoring mechanism 6 for monitoring the slag inside the dry slag remover 1 is arranged on the dry slag remover 1, and the sealing mechanism 3 includes:

[0026] The actuator assembly 31 includes a shutoff door 311 installed at the lower end outlet of the cold slag bucket 2 for opening and closing the dry slag remover 1, a first servo oil cylinder 312 installed between the cold slag bucket 2 and the shutoff door 311 for driving the shutoff door 311 to open and close, and a sealing sleeve 313 installed between the cold slag bucket 2 and the shutoff door 311 for improving sealing performance;

[0027] The cooling air assembly 32 includes an air duct 321 connected to the shutoff door 311 for supplying air, and the other end of the air duct 321 is connected to a fan 322 for supplying air to the shutoff door 311, and a hood 323 for promoting air circulation is installed on the shutoff door 311.

[0028] In this implementation scheme, the monitoring mechanism 6 monitors the implementation of the ash slag in the cold slag hopper 2, and sends instructions to the first servo cylinder 32 through the DCS system. The first servo cylinder 32 can achieve high-precision control according to the instructions of the DCS system, and accurately control the opening of the shut-off door 31 and the slag discharge amount; because the shut-off door 31 is a closed wind chamber and is equipped with a wind hood 43, the fan 42 supplies air to the shut-off door 31 through the air duct 41, and the wind source can come from the furnace above the shut-off door 31, or from the slag bin and the natural atmosphere. Under the action of the cooling wind, the surface of the ash slag in the cold slag hopper 2 is quickly cooled to prevent the high-temperature ash slag from sticking together and causing slag blockage.

[0029] Specifically, the coke squeezing mechanism 5 includes coke squeezing doors 51 installed on both sides of the lower end of the dry slag remover 1 and used to crush the residual slag blocks that fall into the coke squeezer, and a second servo cylinder 52 for driving the coke squeezing door 51 to move is installed between the cold slag bucket 2 and the coke squeezing door 51.

[0030] In this embodiment, when some relatively large slag blocks fall into the slag discharge port, the second servo cylinder 52 can be driven by the coke squeezing door 51 to crush them.

[0031] Specifically, the monitoring mechanism 6 includes a thermal imager 61 installed above the cold slag bucket 2 and used to monitor the ash inside the dry slag remover 1, a mounting bracket 62 for installing the thermal imager 61, a fixing seat 63 welded and fixed to the mounting bracket 62, an adjustment seat 64 rotatably mounted on the fixing seat 63 and used for angle adjustment, and a mounting seat 65 welded and fixed on the adjustment seat 64 for fixed installation on the cold slag bucket 2.

[0032] In this embodiment, the state of the ash in the cold slag hopper 2 can be monitored in real time by the thermal imager 61, and the shape, height and temperature of the ash in the cold slag hopper 2 can be displayed in real time in the centralized control room through image analysis software, and the signal can be sent to the existing DCS system at the same time.

[0033] Specifically, the monitoring mechanism 6 also includes a connecting frame 641 which is arranged inside the adjusting seat 64 and avoids interference with the connecting axis of the adjusting seat 64 and the fixed seat 63, a guide rod 642 which is slidably installed at the lower end of the adjusting seat 64 and fixed to the connecting frame 641 and used for guiding, a tooth head 644 fixed on the connecting frame 641 and used for angle fixing of the adjusting seat 64 and the fixed seat 63, and a spring 645 mounted on the guide rod 642, a button head 643 which is slidably installed at the upper end of the adjusting seat 64 and fixed to the connecting frame 641 and used for adjustment, and a plurality of tooth grooves which are distributed circumferentially on the inner wall of the fixed seat 63 and are used for adjusting different angles.

[0034] In this embodiment, by pressing the button head 643, the tooth head 644 can be driven to disengage from the tooth groove on the fixed seat 63, so that the adjustment seat 64 and the fixed seat 63 can be rotated, so that the thermal imager 61 installed on the mounting frame 62 of the fixed seat 63 can be adjusted in angle with the mounting seat 65 on the adjustment seat 64, so that the angle of the thermal imager 61 can be adjusted after it is installed on the cold slag bucket 2, so that it is convenient to adjust to a suitable monitoring angle for the inside of the cold slag bucket 2.

[0035] The working principle and use process of the utility model are as follows: first, by pressing the button head 643, the tooth head 644 can be driven to disengage from the tooth groove on the fixed seat 63, so that the adjustment seat 64 and the fixed seat 63 can rotate, so that the thermal imager 61 installed on the mounting frame 62 of the fixed seat 63 can be adjusted in angle with the mounting seat 65 on the adjustment seat 64, so that the thermal imager 61 can also be adjusted in angle after being installed on the cold slag bucket 2, so as to be conveniently adjusted to a suitable monitoring angle for the inside of the cold slag bucket 2;

[0036] The state of the ash in the cold slag bucket 2 is monitored in real time by the thermal imager 61. The shape, height and temperature of the ash in the cold slag bucket 2 are displayed in real time in the centralized control room by the image analysis software. At the same time, the signal is sent to the existing DCS system. The monitoring mechanism 6 monitors the implementation of the ash in the cold slag bucket 2. The DCS system issues instructions to the first servo cylinder 32. The first servo cylinder 32 can achieve high-precision control according to the instructions of the DCS system, and accurately control the opening of the shut-off door 31 and the amount of slag discharge. Since the shut-off door 31 is a closed wind chamber and is equipped with a wind cap 43, the fan 42 supplies air to the shut-off door 31 through the air duct 41. The wind source can come from the furnace above the shut-off door 31, or from the slag bin and the natural atmosphere. Under the action of the cooling wind, the ash in the cold slag bucket 2 is rapidly cooled on the surface to avoid the high-temperature ash from sticking together and causing slag blocking. Moreover, when individual larger slag blocks fall into the slag discharge port, the second servo cylinder 52 can be driven by the coke squeezing door 51 to crush them.

[0037] The model of the servo cylinder is: ZXSCFDG, the model of the thermal imager is: RX-500, and the model of the fan is: RX-24. All of them are products using existing mature technologies and will not be elaborated on in detail here. All the electrical components appearing in this article are connected to the external main controller and 220V AC power.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slag cooling system with a heat recovery mechanism, comprising a dry slag remover (1) and a cold slag bucket (2) arranged on the dry slag remover (1) for slag to fall into the dry slag remover (1) for transportation, the cold slag bucket (2) being provided with a sealing mechanism (3) for sealing the inside of the dry slag remover (1), the cold slag bucket (2) being provided with a coke squeezing mechanism (5) for crushing the remaining slag blocks that fall into the dry slag remover, the dry slag remover (1) being provided with a monitoring mechanism (6) for monitoring the slag inside the dry slag remover (1), characterized in that: The sealing mechanism (3) comprises: An actuator assembly (31) comprises a shutoff door (311) installed at the inner lower end outlet of the cold slag bucket (2) for opening and closing the dry slag remover (1), a first servo oil cylinder (312) installed between the cold slag bucket (2) and the shutoff door (311) for driving the shutoff door (311) to open and close, and a sealing sleeve (313) installed between the cold slag bucket (2) and the shutoff door (311) for improving sealing performance; The cooling air assembly (32) comprises an air duct (321) connected to the shutoff door (311) for supplying air, and the other end of the air duct (321) is connected to a fan (322) for supplying air to the shutoff door (311), and a hood (323) for promoting air circulation is installed on the shutoff door (311).

2. A slag cooling system with a heat recovery mechanism according to claim 1, characterized in that: The coke squeezing mechanism (5) comprises coke squeezing doors (51) installed on both sides of the lower end of the dry slag remover (1) and used to crush the residual slag blocks that fall into the coke squeezer, and a second servo oil cylinder (52) is installed between the cold slag bucket (2) and the coke squeezing door (51) for driving the coke squeezing door (51) to move.

3. The slag cooling system with a heat recovery mechanism according to claim 1, characterized in that: The monitoring mechanism (6) comprises a thermal imager (61) installed above the cold slag bucket (2) and used to monitor the ash inside the dry slag remover (1), a mounting frame (62) for mounting the thermal imager (61), a fixing seat (63) welded and fixed to the mounting frame (62), an adjustment seat (64) rotatably mounted with the fixing seat (63) and used for angle adjustment, and a mounting seat (65) welded and fixed to the adjustment seat (64) and used for fixed installation on the cold slag bucket (2).

4. The slag cooling system with a heat recovery mechanism according to claim 3, characterized in that: The monitoring mechanism (6) also includes a connecting frame (641) arranged inside the adjusting seat (64) and avoiding interference with the connecting shaft of the adjusting seat (64) and the fixing seat (63), a guide rod (642) slidably mounted on the lower end of the adjusting seat (64) and fixed to the connecting frame (641) and used for guiding, a tooth head (644) fixed on the connecting frame (641) and used for fixing the angle of the adjusting seat (64) and the fixing seat (63), and a spring (645) sleeved on the guide rod (642).

5. The slag cooling system with a heat recovery mechanism according to claim 3, characterized in that: The monitoring mechanism (6) also includes a button head (643) which is slidably mounted on the upper end of the adjustment seat (64) and fixed to the connecting frame (641) and used for adjustment.

6. The slag cooling system with a heat recovery mechanism according to claim 3, characterized in that: The monitoring mechanism (6) also includes a plurality of tooth grooves which are arranged on the inner wall of the fixing seat (63) and are distributed circumferentially and are used for adjusting different angles.

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