Automatic control system and control method for ascension pipe

Abstract

The invention discloses an ascending pipe automatic control system and a control method. The control system comprises an ascending pipe heat exchanger; the water inlet pipe is arranged on the riser heat exchanger; the water outlet pipe is arranged on the riser heat exchanger; the diffusing pipe is communicated with the water outlet pipe; the first temperature measuring device is arranged on the riser heat exchanger and is used for detecting the temperature of a raw gas outlet; the second temperature measuring device is arranged on the ascending pipe and is used for detecting the temperature of the wall surface of the ascending pipe; a water inlet electric regulating valve and a water inlet manual valve are arranged on the water inlet pipe; a water outlet electric regulating valve, a water outlet manual valve and a flow meter are arranged on the water outlet pipe; a bleeding electric regulating valve and a bleeding manual valve are arranged on the bleeding pipe; wherein the water inlet electric control valve is interlocked with the first temperature measuring device; the water inlet electric control valve, the water outlet electric control valve and the diffusion electric control valve are respectively interlocked with the second temperature measuring device; and the water inlet electric control valve, the water outlet electric control valve and the diffusion electric control valve are respectively interlocked with the flow meter.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery of coke oven riser pipes, and in particular to an automatic control system and a control method for riser pipes. Background Art

[0002] In recent years, the technology of waste heat recovery system of coke oven waste gas riser has gradually matured and gradually become the standard configuration for new coke ovens and renovated coke ovens in the coking industry.

[0003] However, the coke pushing sequence of the coke ovens is different, the coke formation cycle is long, and the state of the coke in each riser is different, resulting in a fluctuating raw gas outlet temperature. It is easy for the raw gas temperature to be low (about 400°C) at the end of coking. However, the amount of water (deoxygenated water) entering the riser remains unchanged, resulting in the raw gas outlet temperature after heat exchange being less than 450°C (tar condensation point temperature), causing tar and graphite to form in the riser and emitting black smoke, resulting in serious environmental problems.

[0004] In addition, the conditions of the coke oven are complicated. When there is a major power outage, water leakage in the riser, system instability, or operational errors that cause the riser to lack water and burn dry, manual inspections are required and cannot be handled in a timely manner. Long-term dry burning of the riser will damage and reduce the service life of the riser, affecting the safety of the system.

[0005] Therefore, based on the above problems, coking plants are gradually no longer satisfied with the manual operation of the furnace top riser, and tend to develop unmanned and automatic control of the riser. However, the existing coke oven riser waste heat recovery system is currently unable to achieve the single-pipe single-control function of automatic water volume adjustment, automatic leak detection, and automatic cutoff for a single riser, that is, it cannot achieve the function of unmanned and automatic control. Summary of the invention

[0006] The purpose of the present invention is to design an automatic control system for riser pipes and provide a control method to address the problem that the existing waste heat recovery system for coke oven riser pipes does not have unmanned and automatic control functions, thereby solving the problem that the existing waste heat recovery system for coke oven riser pipes cannot achieve the single-pipe single-control functions of automatic water volume adjustment, automatic leak detection, and automatic cut-off for a single riser pipe.

[0007] To achieve the above object, the present invention is implemented by the following technical solutions:

[0008] The present invention designs an automatic control system for a riser, which includes the following:

[0009] A riser heat exchanger having opposed raw gas inlet and raw gas outlet;

[0010] a water inlet pipe, which is arranged on the riser heat exchanger to pass deoxygenated water therein, so as to realize heat exchange between the deoxygenated water and the raw gas, thereby utilizing the waste heat of the raw gas;

[0011] a water outlet pipe, which is arranged on the riser heat exchanger;

[0012] A discharge pipe is connected to the water outlet pipe; the discharge pipe can be used to discharge water and steam when performing fault diagnosis;

[0013] a first temperature measuring device, which is arranged on the riser heat exchanger to detect the temperature at the raw gas outlet;

[0014] and a second temperature measuring device, which is arranged on the riser heat exchanger to detect the temperature of the wall surface of the riser heat exchanger;

[0015] The water inlet pipe is also provided with a water inlet electric regulating valve and a water inlet manual valve; the water outlet pipe is also provided with a water outlet electric regulating valve, a water outlet manual valve and a flow meter; the discharge pipe is also provided with a discharge electric regulating valve and a discharge manual valve;

[0016] Wherein, the water inlet electric regulating valve is interlocked with the first temperature measuring device;

[0017] The water inlet electric regulating valve, the water outlet electric regulating valve and the release electric regulating valve are respectively interlocked with the second temperature measuring device;

[0018] The water inlet electric regulating valve, the water outlet electric regulating valve and the release electric regulating valve are respectively interlocked with the flow meter.

[0019] Furthermore, a riser automatic control system: the first temperature measuring device is arranged near the raw gas outlet.

[0020] Furthermore, a riser automatic control system is provided: the water inlet electric regulating valve is arranged downstream of the water inlet manual valve.

[0021] Furthermore, a riser automatic control system is provided: the water outlet electric regulating valve is arranged upstream of the water outlet manual valve.

[0022] Furthermore, a riser automatic control system is provided: the connection point between the vent pipe and the water outlet pipe is located upstream of the water outlet electric regulating valve.

[0023] The present invention also provides a method for automatically controlling a riser pipe, the method comprising the following steps:

[0024] S1. The water inlet electric regulating valve is interlocked with the first temperature measuring device and the following interlocking control settings are performed to ensure that the temperature of the raw gas outlet is ≥500°C:

[0025] (a) When the first temperature measuring device detects that the raw gas outlet temperature is lower than 550° C., the water inlet electric regulating valve is controlled to reduce its opening to reduce the water inlet amount of the single riser heat exchanger;

[0026] (b) when the first temperature measuring device detects that the raw gas outlet temperature is higher than 550° C., the opening of the water inlet electric regulating valve is controlled to be adjusted according to the temperature so as to increase the water inlet amount of the single riser heat exchanger;

[0027] (c) When the first temperature measuring device detects that the raw gas outlet temperature is lower than the limit value of 500°C, the water inlet electric regulating valve is controlled to maintain a minimum opening of 0.5t / h to avoid dry burning of the riser heat exchanger due to lack of water;

[0028] S2. The water inlet electric regulating valve, the water outlet electric regulating valve and the release electric regulating valve are respectively interlocked with the second temperature measuring device and the following interlocking control settings are performed:

[0029] (a) When the second temperature measuring device detects that the wall temperature of the riser heat exchanger reaches the "alarm temperature value", an "alarm signal" is sent to the integrated control room to remind the staff that the riser heat exchanger has a potential risk of "dry burning due to lack of water" and further observation is required;

[0030] (b) When the second temperature measuring device detects that the wall temperature of the riser heat exchanger reaches a "dangerous temperature value", it indicates that a "dry burning due to lack of water" problem occurs in the single riser heat exchanger, and a "danger signal" is sent to the integrated control room, requiring on-site staff to immediately perform fault diagnosis and processing, and at the same time, the venting electric regulating valve is controlled to automatically open after receiving the "danger signal", and the outlet electric regulating valve and the inlet electric regulating valve are controlled to automatically close;

[0031] S3, interlocking the water inlet electric regulating valve, the water outlet electric regulating valve and the release electric regulating valve with the flow meter respectively and performing the following interlocking control settings:

[0032] (a) When the flow meter detects that the deoxygenated water flow rate in the water inlet pipe is less than 0.5 t / h, an alarm signal is automatically sent to the control room for sound and light alarm. After receiving the alarm signal, the control room personnel remind the furnace top on-site operators to check the problem to ensure uniform water distribution, environmental protection and safety of the entire system; at the same time, the water inlet electric regulating valve is controlled to be closed and the discharge electric regulating valve is controlled to be opened, and the water outlet electric regulating valve is automatically cut off and closed 5 to 8 seconds after the discharge electric regulating valve is opened.

[0033] Specifically, the water inlet of a single riser heat exchanger is normally about 1.5 t / h.

[0034] Furthermore, a method for automatic control of a riser pipe is provided: the "alarm temperature value" in step S2 is set to 75-85°C; the "danger temperature value" is set to 95-105°C.

[0035] Furthermore, a method for automatic control of a riser pipe is provided: the "alarm temperature value" in step S2 is set to 80°C; the "danger temperature value" is set to 100°C.

[0036] Specifically, in step S2, after the "alarm signal" is issued, the on-site staff may not perform fault diagnosis and processing first, but at this time the staff should pay attention to the potential risk of "dry burning due to lack of water" in the riser heat exchanger and keep observing the real-time detection data of the second temperature measuring device; and when the "danger signal" is received, fault diagnosis and troubleshooting must be performed to avoid the riser heat exchanger from "dry burning due to lack of water" for a long time and affecting its service life. The present invention can achieve early warning of the "dry burning due to lack of water" problem in the riser heat exchanger through the secondary alarm signal reminder setting, and can perform fault diagnosis and processing in time after the "dry burning due to lack of water" problem occurs, thereby avoiding the riser heat exchanger from being dry burning due to lack of water for a long time and affecting its service life.

[0037] Beneficial effects of the present invention:

[0038] (1) The riser automatic control system designed by the present invention improves and optimizes the existing coke oven riser waste heat recovery system, and realizes the single-tube single-control functions of automatic water volume adjustment, automatic leak detection, and automatic cut-off for a single riser heat exchanger. That is, the system of the present invention realizes the unattended and automatic control functions of the furnace top riser, thereby ensuring the safety of the waste heat recovery system. The present invention improves the structural design of the riser automatic control system and optimizes the automatic control method, thereby timely troubleshooting, avoiding excessive heat extraction that causes low-temperature condensation of raw coal gas, and avoiding the riser from being tar-coated and graphite-coated, emitting black smoke, and causing environmental problems, thereby ensuring uniform water distribution, environmental protection, and safety of the entire system.

[0039] (2) The automatic control system for the riser designed by the present invention can automatically cut off the water inlet and outlet of a single riser heat exchanger, reducing manual operations; the automatic control system for the riser designed by the present invention can control the heat exchange of the riser to ensure that the temperature of the raw gas at the outlet of the riser heat exchanger is ≥500°C, thereby avoiding environmental problems such as tar formation and black smoke caused by excessive heat extraction. The system of the present invention can ensure uniform water distribution and environmental protection of the entire system.

[0040] (3) The automatic control method for the riser provided by the present invention forms a "double alarm reminder" by detecting the wall temperature of the riser heat exchanger and the flow signal of the water inlet pipe, automatically detects whether a single riser is "dry-burning due to lack of water", and performs fault processing in time, thereby avoiding the riser heat exchanger from being dry-burned due to lack of water to the greatest extent and affecting its service life. That is, the present invention forms a "single alarm reminder" by interlocking the second temperature measuring device with the water inlet electric regulating valve, the water outlet electric regulating valve and the venting electric regulating valve. When it is detected that the wall temperature of the riser heat exchanger reaches the "dangerous temperature value", it is determined that the riser heat exchanger has a "dry-burning due to lack of water" problem, and fault diagnosis is performed in time to avoid dry-burning. At the same time, the present invention also interlocks the flow meter with the water inlet electric regulating valve, the water outlet electric regulating valve and the vent electric regulating valve, which forms a "double alarm reminder". When it is detected that the water inlet pipe flow is lower than 0.5t / h, it means that the amount of deoxygenated water flowing through the riser heat exchanger is small, and a small amount of heat exchange medium (deoxygenated water) is not enough to complete heat exchange with a large amount of raw coal gas to significantly reduce its temperature, thus causing dry burning of the riser. Through the flow signal alarm reminder, the flow can be adjusted in time to avoid dry burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 An automatic control system for a riser tube provided in Example 1 of the present invention is specifically a structural schematic diagram of a single riser tube heat exchanger.

[0043] Markings in the figure: 1-riser heat exchanger, 2-water inlet pipe, 3-water outlet pipe, 4-vent pipe, 5-first temperature measuring device, 6-second temperature measuring device, 11-raw gas inlet, 12-raw gas outlet, 21-water inlet electric regulating valve, 22-water inlet manual valve, 31-water outlet electric regulating valve, 32-water outlet manual valve, 33-flow meter, 41-vent electric regulating valve, 42-vent manual valve. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating the position or positional relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0046] Example 1

[0047] like Figure 1 As shown, this embodiment 1 designs an automatic control system for a riser, and the automatic control system for a riser includes the following:

[0048] A riser heat exchanger 1 having a raw gas inlet 11 and a raw gas outlet 12 opposite to each other;

[0049] The water inlet pipe 2 is arranged on the riser heat exchanger 1 and close to the raw gas inlet 11, so as to introduce deoxygenated water therein to realize heat exchange between the deoxygenated water and the high-temperature raw gas; the water inlet pipe 2 is also provided with a water inlet electric regulating valve 21 and a water inlet manual valve 22, and the water inlet electric regulating valve 21 is arranged downstream of the water inlet manual valve 22 (that is, the water inlet electric regulating valve 21 is arranged closer to the riser heat exchanger 1);

[0050] The water outlet pipe 3 is arranged on the riser heat exchanger 1 and is close to the raw gas outlet 12; the water outlet pipe 3 is also provided with a water outlet electric regulating valve 31, a water outlet manual valve 32 and a flow meter 33, and the water outlet electric regulating valve 31 is arranged upstream of the water outlet manual valve 32 (that is, the water outlet electric regulating valve 31 is arranged closer to the riser heat exchanger 1);

[0051] A vent pipe 4 is connected to the water outlet pipe 3, and the connection between the vent pipe 4 and the water outlet pipe 3 is located upstream of the water outlet electric regulating valve 31; the vent pipe 4 is also provided with a vent electric regulating valve 41 and a vent manual valve 42, and the vent electric regulating valve 41 is arranged away from the riser heat exchanger 1;

[0052] A first temperature measuring device 5, which is arranged on the riser heat exchanger 1 and close to the raw gas outlet 12, for detecting the temperature at the raw gas outlet 12 (i.e. detecting the temperature of the raw gas at the outlet);

[0053] and a second temperature measuring device 6, which is arranged on the riser heat exchanger 1 and is used to detect the temperature of the wall surface of the riser heat exchanger 1;

[0054] Wherein, the water inlet electric regulating valve 21 is interlocked with the first temperature measuring device 5;

[0055] The water inlet electric regulating valve 21, the water outlet electric regulating valve 31 and the release electric regulating valve 41 are respectively interlocked with the second temperature measuring device 6;

[0056] The water inlet electric regulating valve 21 , the water outlet electric regulating valve 31 and the release electric regulating valve 41 are respectively interlocked with the flow meter 33 .

[0057] Example 2

[0058] This embodiment 2 proposes an automatic control method for a riser pipe in view of the "automatic control system for a riser pipe" designed in the above embodiment 1. The method comprises the following steps:

[0059] S1. The water inlet electric regulating valve 21 is interlocked with the first temperature measuring device 5, and the following interlocking control settings are performed to ensure that the temperature of the raw gas outlet is ≥500°C:

[0060] (a) When the first temperature measuring device 5 detects that the raw gas outlet temperature is lower than 550° C., the water inlet electric regulating valve 21 is controlled to reduce its opening to reduce the water inlet amount of the single riser heat exchanger 1;

[0061] (b) When the first temperature measuring device 5 detects that the raw gas outlet temperature is higher than 550° C., the opening of the water inlet electric regulating valve 21 is controlled to be adjusted according to the temperature so as to increase the water inlet amount of the single riser heat exchanger 1;

[0062] (c) When the first temperature measuring device 5 detects that the raw gas outlet temperature is lower than the limit value of 500° C., the water inlet electric regulating valve 21 is controlled to maintain a minimum opening of 0.5 t / h to avoid "dry burning" of the riser heat exchanger 1 due to lack of water;

[0063] S2, interlocking the water inlet electric regulating valve 21, the water outlet electric regulating valve 31 and the release electric regulating valve 41 with the second temperature measuring device 6 respectively, and performing the following interlocking control settings:

[0064] (a) When the second temperature measuring device 6 detects that the wall temperature of the riser heat exchanger 1 reaches the "alarm temperature value" (i.e., when it reaches 80°C), it sends an "alarm signal" to the integrated control room to remind the staff that the riser heat exchanger 1 has a potential risk of "dry boiling due to lack of water" and needs further observation;

[0065] (b) When the second temperature measuring device 6 detects that the wall temperature of the riser heat exchanger 1 reaches a "dangerous temperature value" (i.e., when it reaches 100°C), it indicates that the single riser heat exchanger 1 has a "water shortage and dry burning" problem, and a "danger signal" is sent to the integrated control room, requiring the on-site staff to immediately perform fault diagnosis and processing, and at the same time, the venting electric regulating valve 41 is controlled to automatically open after receiving the "danger signal" (to discharge water vapor for troubleshooting and diagnosis), and the water outlet electric regulating valve 31 and the water inlet electric regulating valve 21 are controlled to automatically close (fault diagnosis is performed after the water outlet electric regulating valve 31 and the water inlet electric regulating valve 21 are closed, and short-term dry burning during the troubleshooting period is allowed by the riser design);

[0066] S3, the water inlet electric regulating valve 21, the water outlet electric regulating valve 31 and the release electric regulating valve 41 are interlocked with the flow meter 33 respectively, and the following interlocking control settings are performed:

[0067] (a) When the flow meter 33 detects that the deoxygenated water flow in the water inlet pipe 2 is less than 0.5 t / h, an alarm signal is automatically sent to the control room for sound and light alarm. After receiving the alarm signal, the control room personnel remind the furnace top on-site operators to check the problem to ensure uniform water distribution, environmental protection and safety of the entire system; at the same time, the water inlet electric regulating valve 21 is controlled to be closed and the discharge electric regulating valve 41 is controlled to be opened, and the water outlet electric regulating valve 31 is automatically cut off and closed 5 to 8 seconds after the discharge electric regulating valve 41 is opened.

[0068] Specifically, in step S1 of the above-mentioned embodiment 2, when the water inlet electric regulating valve 21 maintains a minimum opening of 0.5 t / h (the normal water inlet volume of a single riser heat exchanger is about 1.5 t / h), the amount of deoxygenated water flowing through the riser heat exchanger 1 is small, thereby preventing the riser heat exchanger 1 outlet raw gas temperature from being less than 500°C (condensation will occur when the raw gas temperature is low) due to excessive heat extraction when the deoxygenated water is exchanged with the raw gas. Therefore, when the first temperature measuring device 5 detects that the raw gas outlet temperature is lower than the limit value of 500°C, the water inlet electric regulating valve 21 is adjusted to maintain a minimum opening through an interlocking setting, thereby reducing the flow rate of deoxygenated water and the heat exchange with the raw gas. In theory, the raw gas temperature at the outlet of the riser heat exchanger 1 can be increased accordingly to prevent it from being lower than 500°C, thereby preventing tar condensation due to the low temperature of the raw gas, and preventing the riser heat exchanger 1 from producing tar, graphite and black smoke, thereby avoiding serious environmental problems.

[0069] Step S2 of the above-mentioned embodiment 2: after the "alarm signal" is issued, the on-site staff may not perform fault diagnosis and processing first, but at this time the staff should pay attention to the potential risk of "dry burning due to lack of water" in the riser heat exchanger 1 and keep observing the real-time detection data of the second temperature measuring device 6; and when the "danger signal" is received, fault diagnosis and troubleshooting must be carried out and timely processing must be carried out to avoid the riser heat exchanger 1 from "dry burning due to lack of water" for a long time and affect its service life. The present invention can achieve early warning of the "dry burning due to lack of water" problem in the riser heat exchanger 1 through the secondary alarm signal reminder setting of "alarm signal" and "danger signal", and can perform fault diagnosis and processing in time after the "dry burning due to lack of water" problem occurs, thereby avoiding the riser heat exchanger 1 from "dry burning due to lack of water" for a long time and affecting its service life.

[0070] The riser automatic control system designed in Example 1 of the present invention improves and optimizes the existing coke oven riser waste heat recovery system, and realizes the single-tube single-control functions of automatic water volume adjustment, automatic leak detection, and automatic cut-off for a single riser heat exchanger. That is, the system of the present invention can realize the unattended and automatic control functions of the riser heat exchanger on the top of the coke oven, and can timely troubleshoot faults to ensure the safety of the waste heat recovery system. The present invention improves the structural design of the riser automatic control system and optimizes the automatic control method of the riser, so as to timely troubleshoot faults and avoid excessive heat extraction that causes low-temperature condensation of raw coal gas, thereby avoiding tar, graphite, and black smoke on the riser, causing environmental problems, thereby ensuring uniform water distribution, environmental protection and safety of the entire system.

[0071] The above are preferred embodiments of the present invention and are only used to explain the present invention, not to limit the present invention. Any obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. An automatic control system for a riser, characterized in that: The automatic control system of the riser includes the following: A riser heat exchanger (1) having a raw gas inlet (11) and a raw gas outlet (12) opposite to each other; A water inlet pipe (2) is arranged on the riser heat exchanger (1) and is used to introduce deoxygenated water into the riser heat exchanger to achieve heat exchange between the deoxygenated water and the raw coal gas; A water outlet pipe (3) arranged on the riser heat exchanger (1); A discharge pipe (4) which is connected to the water outlet pipe (3); a first temperature measuring device (5), which is arranged on the riser heat exchanger (1) and is used to detect the temperature at the raw gas outlet (12); and a second temperature measuring device (6), which is arranged on the riser heat exchanger (1) and is used to detect the temperature of the wall surface of the riser heat exchanger (1); The water inlet pipe (2) is also provided with a water inlet electric regulating valve (21) and a water inlet manual valve (22); the water outlet pipe (3) is also provided with a water outlet electric regulating valve (31), a water outlet manual valve (32) and a flow meter (33); the discharge pipe (4) is also provided with a discharge electric regulating valve (41) and a discharge manual valve (42); in, The water inlet electric regulating valve (21) is interlocked with the first temperature measuring device (5); The water inlet electric regulating valve (21), the water outlet electric regulating valve (31) and the discharge electric regulating valve (41) are respectively interlocked with the second temperature measuring device (6); The water inlet electric regulating valve (21), the water outlet electric regulating valve (31) and the release electric regulating valve (41) are respectively interlocked with the flow meter (33).

2. The automatic control system for a riser according to claim 1, characterized in that: The first temperature measuring device (5) is arranged near the raw gas outlet (12).

3. The automatic control system for a riser according to claim 1, characterized in that: The water inlet electric regulating valve (21) is arranged downstream of the water inlet manual valve (22).

4. The automatic control system for a riser pipe according to claim 1, characterized in that: The water outlet electric regulating valve (31) is arranged upstream of the water outlet manual valve (32).

5. The automatic control system for a riser pipe according to claim 1, characterized in that: The connection point between the vent pipe (4) and the water outlet pipe (3) is located upstream of the water outlet electric regulating valve (31).

6. A method for automatically controlling a rising pipe according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: S1. The water inlet electric regulating valve (21) is interlocked with the first temperature measuring device (5) and the following interlocking control settings are performed to ensure that the temperature of the raw gas outlet is ≥500°C: (a) when the first temperature measuring device (5) detects that the raw gas outlet temperature is lower than 550° C., the water inlet electric regulating valve (21) is controlled to reduce its opening, so as to reduce the water inlet amount of the single riser heat exchanger (1); (b) when the first temperature measuring device (5) detects that the raw gas outlet temperature is higher than 550° C., the opening of the water inlet electric regulating valve (21) is controlled to be adjusted according to the temperature so as to increase the water inlet amount of the single riser heat exchanger (1); (c) when the first temperature measuring device (5) detects that the raw gas outlet temperature is lower than the limit value of 500° C., the water inlet electric regulating valve (21) is controlled to maintain a minimum opening of 0.5 t / h, so as to avoid "dry burning" of the riser heat exchanger (1) due to lack of water; S2. The water inlet electric regulating valve (21), the water outlet electric regulating valve (31) and the discharge electric regulating valve (41) are respectively interlocked with the second temperature measuring device (6) and the following interlocking control settings are performed: (a) When the second temperature measuring device (6) detects that the wall temperature of the riser heat exchanger (1) reaches an "alarm temperature value", an "alarm signal" is sent to the integrated control room to remind the staff that the riser heat exchanger (1) has a potential risk of "dry boiling due to lack of water" and further observation is required; (b) When the second temperature measuring device (6) detects that the wall temperature of the riser heat exchanger (1) reaches a "dangerous temperature value", it is assumed that the single riser heat exchanger (1) has a "water shortage and dry burning" problem, and a "danger signal" is sent to the integrated control room, requiring on-site staff to immediately perform fault diagnosis and processing, and at the same time controlling the discharge electric regulating valve (41) to automatically open after receiving the "danger signal", and controlling the water outlet electric regulating valve (31) and the water inlet electric regulating valve (21) to automatically close; S3, the water inlet electric regulating valve (21), the water outlet electric regulating valve (31) and the release electric regulating valve (41) are respectively interlocked with the flow meter (33) and the following interlocking control settings are performed: (a) When the flow meter (33) detects that the flow rate of deoxygenated water in the water inlet pipe (2) is less than 0.5 t / h, an alarm signal is automatically sent to the control room for sound and light alarm. After receiving the alarm signal, the control room personnel remind the furnace top on-site operator to check the problem, and at the same time control the water inlet electric regulating valve (21) to close and the discharge electric regulating valve (41) to open, and control the water outlet electric regulating valve (31) to be automatically cut off and closed 5 to 8 seconds after the discharge electric regulating valve (41) is opened.

7. The method for automatically controlling a rising pipe according to claim 6, characterized in that: The "alarm temperature value" in step S2 is set to 75-85°C; the "danger temperature value" is set to 95-105°C.

8. The method for automatically controlling a rising pipe according to claim 7, characterized in that: The "alarm temperature value" in step S2 is set to 80°C; the "danger temperature value" is set to 100°C.

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