Converter evaporative cooler outlet flue gas temperature control system and control method

Abstract

The invention discloses a converter evaporative cooler outlet flue gas temperature control system and method, and relates to the technical field of converter evaporative coolers. The converter evaporative cooler outlet flue gas temperature control system comprises an evaporative cooler, a spray gun, a cooling water header pipe, a cooling water branch pipe, an atomization steam header pipe, an atomization steam branch pipe and an evaporative cooling flue. A shell-connected thermocouple is arranged at the tail part of the evaporative cooling flue; and the outlet flue of the evaporative cooler is provided with a shell-connected thermocouple. According to the converter evaporative cooler outlet flue gas temperature control system and method, the flue gas temperature is rapidly measured through six shell type thermocouples connected to the tail of an evaporative cooling flue in a branched mode, the final temperature of inlet flue gas of the evaporative cooler is determined through data processing, and the outlet flue gas temperature is rapidly measured through two shell type thermocouples connected to an outlet flue of the evaporative cooler. And the final temperature of the outlet flue gas of the evaporative cooler is determined through data processing, so that the accurate control of the outlet flue gas temperature of the evaporative cooler is realized.

Description

Technical Field

[0001] The invention relates to the technical field of converter evaporative coolers, and in particular to a converter evaporative cooler outlet flue gas temperature control system and a control method. Background Art

[0002] Dry dust removal is an advanced, efficient and energy-saving converter flue gas purification and recovery process. The converter evaporative cooler is the key equipment for dry dust removal, and the precise control of its outlet flue gas temperature is the key to the reliable operation of the entire system. At present, many companies use insulated thermocouples to measure the inlet and outlet flue gas temperatures of the evaporative cooler, and directly control the opening of the cooling water main regulating valve according to the outlet flue gas temperature and its change rate, so as to achieve the control of the outlet flue gas temperature. This method has the disadvantages of flue gas temperature measurement lag, frequent control valve action, and large fluctuation range of outlet flue gas temperature, which has a certain adverse effect on the flue gas dust removal effect. Therefore, it is very necessary to design a control system that can accurately control the outlet flue gas temperature of the evaporative cooler. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a converter evaporative cooler outlet flue gas temperature control system and control method, which solve the problems existing in the prior art.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a converter evaporative cooler outlet flue gas temperature control system, including an evaporative cooler, a spray gun, a cooling water main pipe, a cooling water branch pipe, an atomizing steam main pipe, an atomizing steam branch pipe, and a vaporizing cooling flue;

[0007] A shell-connected thermocouple is arranged at the tail end of the vaporization cooling flue;

[0008] The evaporative cooler outlet flue is provided with a shell-connected thermocouple;

[0009] The cooling water main pipe is provided with a self-operated pressure regulating valve, a pressure transmitter and an electromagnetic flow meter in sequence;

[0010] The cooling water branch pipe is provided with a remote-controlled quick-cut valve, a rotor flow meter, and a manual valve in sequence;

[0011] The steam main pipe is provided with a self-operated pressure regulating valve, a pressure transmitter, a vortex flowmeter, and a remote-controlled quick-cut valve in sequence;

[0012] A rotor flow meter and a manual valve are arranged on the steam branch pipe in sequence.

[0013] Preferably, the model of the shell-connected thermocouple is: WRK-17A12-X.

[0014] Preferably, a remote-controlled quick-cut-off valve, a rotor flowmeter, and a manual valve are sequentially arranged on the cooling water branch pipe to achieve regulation of the water spray flow of the evaporative cooler and balance of the water spray flow of each branch.

[0015] Preferably, a rotor flowmeter and a manual valve are sequentially arranged on the steam branch pipe to achieve flow regulation of atomized steam in the evaporative cooler and balance of flow in each branch.

[0016] Preferably, the system further includes a PLC controller, and the thermocouple, pressure transmitter, electromagnetic flowmeter, vortex flowmeter, and remote-controlled quick-cut valve signal are all connected to the PLC controller.

[0017] Preferably, the model of the PLC controller is: S7-1516.

[0018] A control method for a converter evaporative cooler outlet flue gas temperature control system includes the converter evaporative cooler outlet flue gas temperature control system described above, and the specific operations are as follows:

[0019] S1: The flue gas temperature is quickly measured by 6 shell-connected thermocouples at the tail of the evaporative cooling flue. The final flue gas temperature at the inlet of the evaporative cooler is determined through data processing and displayed on the display.

[0020] S2: The outlet flue gas temperature is quickly measured through two shell-connected thermocouples at the outlet of the evaporative cooler. The final outlet flue gas temperature of the evaporative cooler is determined through data processing and displayed on the display.

[0021] S3: The 16 quick shut-off valves of the cooling water branch pipes of the spray gun are controlled by the inlet flue gas temperature and change rate of the evaporative cooler, the outlet flue gas temperature, and the outlet target flue gas temperature, so as to achieve precise control of the outlet flue gas temperature of the evaporative cooler.

[0022] Preferably, in step S3, "the 16 spray gun cooling water branch pipe quick shut-off valves are controlled by the evaporative cooler inlet flue gas temperature and change rate, the outlet flue gas temperature, and the outlet target flue gas temperature, so as to achieve precise control of the evaporative cooler outlet flue gas temperature", wherein the control range of the flue gas temperature is five degrees.

[0023] (III) Beneficial effects

[0024] The present invention provides a converter evaporative cooler outlet flue gas temperature control system and control method, which has the following beneficial effects:

[0025] The converter evaporative cooler outlet flue gas temperature control system and control method quickly measures the flue gas temperature through 6 shell-connected thermocouples at the tail end of the vaporization cooling flue, determines the final temperature of the evaporative cooler inlet flue gas through data processing, quickly measures the outlet flue gas temperature through 2 shell-connected thermocouples at the evaporative cooler outlet flue, determines the final temperature of the evaporative cooler outlet flue gas through data processing, and controls 16 spray gun cooling water branch pipe quick shut-off valves through the evaporative cooler inlet flue gas temperature and change rate, outlet flue gas temperature, and outlet target flue gas temperature, thereby achieving precise control of the evaporative cooler outlet flue gas temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a converter evaporative cooler outlet flue gas temperature control system and control method according to an embodiment of the present invention;

[0027] In the figure: 1. Self-operated pressure regulating valve for cooling water main; 2. Pressure transmitter for cooling water main; 3. Electromagnetic flowmeter for cooling water main; 4. Remote-controlled quick-cut-off valve for cooling water branch (1 for each branch, 16 in total); 5. Rotor flowmeter for cooling water branch (1 for each branch, 16 in total); 6. Manual valve for cooling water branch (1 for each branch, 16 in total); 7. Self-operated pressure regulating valve for steam main; 2. Pressure transmitter for steam main; 3. Vortex flowmeter for steam main; 4. Remote-controlled quick-cut-off valve for steam main; 5. Rotor flowmeter for steam branch (1 for each branch, 16 in total); 6. Manual valve for steam branch (1 for each branch, 16 in total); 13. Shell-connected thermocouple at the tail end of vaporization cooling flue; 14. Shell-connected thermocouple at the tail end of vaporization cooling flue; 15. Shell-connected thermocouple at the outlet flue of evaporative cooler. DETAILED DESCRIPTION

[0028] 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, not all of the embodiments. 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.

[0029] See also Figure 1 , the present invention provides a technical solution: a converter evaporative cooler outlet flue gas temperature control system, including an evaporative cooler, a spray gun, a cooling water main pipe, a cooling water branch pipe, an atomizing steam main pipe, an atomizing steam branch pipe, and a vaporizing cooling flue;

[0030] A shell-connected thermocouple is arranged at the tail end of the vaporization cooling flue;

[0031] The evaporative cooler outlet flue is provided with a shell-connected thermocouple;

[0032] The cooling water main pipe is provided with a self-operated pressure regulating valve, a pressure transmitter and an electromagnetic flow meter in sequence;

[0033] The cooling water branch pipe is provided with a remote-controlled quick-cut valve, a rotor flow meter, and a manual valve in sequence;

[0034] The steam main pipe is provided with a self-operated pressure regulating valve, a pressure transmitter, a vortex flowmeter, and a remote-controlled quick-cut valve in sequence;

[0035] A rotor flow meter and a manual valve are arranged on the steam branch pipe in sequence.

[0036] A control method for a converter evaporative cooler outlet flue gas temperature control system includes the above-mentioned converter evaporative cooler outlet flue gas temperature control system, and the specific operations are as follows:.

[0037] S1: The flue gas temperature is quickly measured by 6 shell-connected thermocouples at the tail of the evaporative cooling flue. The final flue gas temperature at the inlet of the evaporative cooler is determined through data processing and displayed on the display.

[0038] S2: The outlet flue gas temperature is quickly measured through two shell-connected thermocouples at the outlet of the evaporative cooler. The final outlet flue gas temperature of the evaporative cooler is determined through data processing and displayed on the display.

[0039] S3: The 16 quick shut-off valves of the cooling water branch pipes of the spray gun are controlled by the inlet flue gas temperature and change rate of the evaporative cooler, the outlet flue gas temperature, and the outlet target flue gas temperature, so as to achieve precise control of the outlet flue gas temperature of the evaporative cooler.

[0040] Example 1

[0041] A converter evaporative cooler outlet flue gas temperature control system and control method, the system includes an evaporative cooler, a spray gun, a cooling water main pipe, a cooling water branch pipe, an atomizing steam main pipe, an atomizing steam branch pipe, a vaporizing cooling flue, etc. Six shell-connected thermocouples are arranged at the tail of the vaporizing cooling flue, two shell-connected thermocouples 14 are used to realize the rapid measurement of the evaporative cooler inlet flue gas temperature, and four shell-connected thermocouples 13 are used to judge the distribution of the flue gas temperature of the evaporative cooler inlet pipe; two shell-connected thermocouples 15 are arranged at the evaporative cooler outlet flue to realize the rapid measurement of the evaporative cooler outlet flue gas temperature;

[0042] Example 2

[0043] On the basis of Example 1, the cooling water main pipe is provided with a self-operated pressure regulating valve, a pressure transmitter, and an electromagnetic flowmeter in sequence to realize pressure regulation, pressure display, and flow display of the cooling water main pipe; the cooling water branch pipe is provided with a remote-controlled quick-cut valve, a rotor flowmeter, and a manual valve in sequence to realize water spray flow regulation of the evaporative cooler and balance of water spray flow of each branch;

[0044] Example 3

[0045] On the basis of Example 2, the steam main pipe is provided with a self-operated pressure regulating valve, a pressure transmitter, a vortex flowmeter, and a remote-controlled quick-cut valve in sequence to realize the pressure regulation, pressure display, flow display and control of the atomized steam main pipe; the steam branch pipe is provided with a rotor flowmeter and a manual valve in sequence to realize the atomized steam flow regulation of the evaporative cooler and the balance of the flow of each branch.

[0046] Example 4

[0047] On the basis of Example 3, a PLC controller is also included, and the thermocouple, pressure transmitter, electromagnetic flowmeter, vortex flowmeter, and remote control quick shut-off valve signal are all connected to the PLC controller.

[0048] Example 5

[0049] On the basis of Example 4, a converter evaporative cooler outlet flue gas temperature control system and control method are provided, which rapidly measures the evaporative cooler inlet flue gas temperature by means of a shell-connected thermocouple at the tail end of a vaporization cooling flue, and determines the flue gas temperature distribution field in the pipeline; rapidly measures the evaporative cooler outlet flue gas temperature by means of a shell-connected thermocouple at the evaporative cooler outlet flue gas; calculates the number of cooling water branch pipe remote-controlled quick-cut valves that need to be opened according to the evaporative cooler inlet flue gas temperature, the evaporative cooler inlet flue gas temperature change rate, the evaporative cooler outlet flue gas temperature, and the evaporative cooler outlet flue gas target temperature; calculates which specific branches need to open the remote-controlled quick-cut valves according to the flue gas temperature distribution field in the pipeline; controls the remote-controlled quick-cut valves by means of a PLC, and realizes precise control of the evaporative cooler outlet temperature.

[0050] In summary, the converter evaporative cooler outlet flue gas temperature control system and control method quickly measures the flue gas temperature through 6 shell-connected thermocouples at the tail end of the vaporization cooling flue, determines the final temperature of the evaporative cooler inlet flue gas through data processing, quickly measures the outlet flue gas temperature through 2 shell-connected thermocouples at the evaporative cooler outlet flue, determines the final temperature of the evaporative cooler outlet flue gas through data processing, and controls 16 spray gun cooling water branch pipe quick shut-off valves through the evaporative cooler inlet flue gas temperature and change rate, outlet flue gas temperature, and outlet target flue gas temperature, thereby achieving precise control of the evaporative cooler outlet flue gas temperature.

[0051] 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", "comprise" or any other variants 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.

[0052] 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 converter evaporative cooler outlet flue gas temperature control system, characterized in that: It includes evaporative cooler, spray gun, cooling water main pipe, cooling water branch pipe, atomizing steam main pipe, atomizing steam branch pipe, vaporizing cooling flue; A shell-connected thermocouple is arranged at the tail end of the vaporization cooling flue; The evaporative cooler outlet flue is provided with a shell-connected thermocouple; The cooling water main pipe is provided with a self-operated pressure regulating valve, a pressure transmitter and an electromagnetic flow meter in sequence; The cooling water branch pipe is provided with a remote-controlled quick-cut valve, a rotor flow meter, and a manual valve in sequence; The steam main pipe is provided with a self-operated pressure regulating valve, a pressure transmitter, a vortex flowmeter, and a remote-controlled quick-cut valve in sequence; A rotor flow meter and a manual valve are arranged on the steam branch pipe in sequence.

2. A converter evaporative cooler outlet flue gas temperature control system according to claim 1, characterized in that: The model of the shell-connected thermocouple is: WRK-17A12-X.

3. A converter evaporative cooler outlet flue gas temperature control system according to claim 1, characterized in that: The cooling water branch pipe is provided with a remote-controlled quick-cut valve, a rotor flowmeter, and a manual valve in sequence, so as to adjust the water spray flow of the evaporative cooler and balance the water spray flow of each branch.

4. A converter evaporative cooler outlet flue gas temperature control system according to claim 1, characterized in that: The steam branch pipe is provided with a rotor flow meter and a manual valve in sequence, so as to realize the regulation of the atomized steam flow of the evaporative cooler and the balance of the flow of each branch.

5. The converter evaporative cooler outlet flue gas temperature control system according to claim 1, characterized in that: The control system also includes a PLC controller, and the thermocouple, pressure transmitter, electromagnetic flowmeter, vortex flowmeter, and remote control quick cut-off valve signal are all connected to the PLC controller.

6. A converter evaporative cooler outlet flue gas temperature control system according to claim 5, characterized in that: The model of the PLC controller is: S7-1516.

7. A control method for a flue gas temperature control system at a converter evaporative cooler outlet, characterized in that: The converter evaporative cooler outlet flue gas temperature control system according to claim 1 is specifically operated as follows: S1: The flue gas temperature is quickly measured by 6 shell-connected thermocouples at the tail of the evaporative cooling flue. The final flue gas temperature at the inlet of the evaporative cooler is determined through data processing and displayed on the display. S2: The outlet flue gas temperature is quickly measured through two shell-connected thermocouples at the outlet of the evaporative cooler. The final outlet flue gas temperature of the evaporative cooler is determined through data processing and displayed on the display. S3: The 16 quick shut-off valves of the cooling water branch pipes of the spray gun are controlled by the inlet flue gas temperature and change rate of the evaporative cooler, the outlet flue gas temperature, and the outlet target flue gas temperature, so as to achieve precise control of the outlet flue gas temperature of the evaporative cooler.

8. The control method of the converter evaporative cooler outlet flue gas temperature control system according to claim 7, characterized in that: In step S3, "the 16 spray gun cooling water branch pipe quick shut-off valves are controlled by the evaporative cooler inlet flue gas temperature and change rate, outlet flue gas temperature, and outlet target flue gas temperature, so as to achieve precise control of the evaporative cooler outlet flue gas temperature", where the control range of the flue gas temperature is five degrees.

Images