Blockage monitoring system for slag pit of coal-fired chain boiler

Abstract

The utility model discloses a coal-fired chain boiler slag pit blockage monitoring system which comprises a temperature sensor arranged on the upper portion of a slag pit necking opening above a slag crusher, and a left slag falling channel and a right slag falling channel on the lower portion of the slag crusher are respectively provided with a temperature sensor. The output ends of the three temperature sensors are connected to the input ends of the three temperature transmitters through leads respectively, the three temperature transmitters output standard electric signals respectively and are connected to the input end of the PLC analog quantity channel module in the control room, the output end of the PLC analog quantity channel module is connected with the input end of the indoor industrial personal computer, and the output end of the indoor industrial personal computer is connected with the output end of the PLC analog quantity channel module. The output end of the industrial personal computer is connected with an indoor buzzer. The temperature of three different positions of the slag pit can be monitored in real time, sound-light alarm is carried out, meanwhile, the specific position where the slag pit is blocked can be rapidly locked through the indoor industrial personal computer according to temperature data, and blocking can be conveniently handled in time; and the system is used for confirming the blockage cleaning effect and analyzing the cause and rule of slag pit blockage according to the recorded temperature data.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the industrial automation control technical field, concretely relates to a kind of coal-fired chain boiler slag pit blockage monitoring system, BACKGROUND

[0002] When coal-fired chain boiler operates, the slag after combustion, through slag pit, after crushing by slag crusher, is dropped into slag pool by left and right slag drop channels, and is transported to slag bin by scraper and slag conveying belt.When slag is seriously coked, it can bridge at the slag pit shrinkage or block at the left and right slag drop channels below the slag crusher.If the blockage can be found in the first time, it can be handled in time, and the difficulty of manual cleaning is small, and it does not cause equipment damage and economic loss.If it is not found in time, the blocked slag will continue to accumulate upward, and the high-temperature slag may cause the slag drop opening of the steel ladle surrounding structure to be deformed or accumulate upward to the eagle iron, which hinders the normal operation of the grate and causes shutdown accidents, etc., resulting in a series of economic losses.The high-temperature slag accumulated in large quantities is difficult to handle, and the slag may violently splash during dredging, which may cause personal injury accidents. SUMMARY

[0003] The utility model solves the technical problem of providing a coal-fired chain boiler slag pit blockage monitoring system, which can monitor the temperature changes of the slag pit shrinkage and the left and right slag drop channels in real time, solve the problem of not being able to find the slag pit blockage in time, and quickly lock the blockage position and the data record can be used for cause analysis and rule finding.

[0004] The technical scheme of the utility model is as follows:

[0005] A coal-fired chain boiler slag pit blockage monitoring system, comprising a No. 1 temperature sensor arranged at the slag pit shrinkage above the slag crusher, the No. 1 temperature sensor being connected to the input end of a No. 1 temperature transmitter through a lead, and the output end of the No. 1 temperature transmitter being connected to the input end of a PLC analog channel; a No. 2 temperature sensor arranged at the left side slag drop channel below the slag crusher, the No. 2 temperature sensor being connected to the input end of a No. 2 temperature transmitter through a lead, and the output end of the No. 2 temperature transmitter being connected to the input end of the PLC analog channel; a No. 3 temperature sensor arranged at the right side slag drop channel below the slag crusher, the No. 3 temperature sensor being connected to the input end of a No. 3 temperature transmitter through a lead, and the output end of the No. 3 temperature transmitter being connected to the input end of the PLC analog channel; the output end of the PLC analog channel being connected to the input end of an indoor industrial computer, and the output end of the indoor industrial computer being connected to an indoor buzzer.

[0006] Further, the No. 1 temperature sensor is arranged at the center of the slag pit shrinkage, the No. 2 temperature sensor is arranged at the entrance of the left side slag drop channel, and the No. 3 temperature sensor is arranged at the exit of the right side slag drop channel.

[0007] Further, the first temperature sensor, the second temperature sensor and the third temperature sensor are all K-type thermocouples.

[0008] Further, the PLC communicates with the indoor industrial computer through Modbus RTU protocol.

[0009] The slag pit blocking monitoring system has the advantages that the slag pit three different positions temperature can be monitored in real time, once the slag pit is blocked, the temperature of the blocked position is increased, exceeds the alarm threshold, the buzzer sends an alarm (sound, light), and the indoor industrial computer can quickly lock the specific position of the slag pit blocking according to the temperature data, so that the blocking can be processed in time; the effect of cleaning the blocking can be confirmed, and the reason and law of the slag pit blocking can be analyzed according to the recorded temperature data. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is a structural block diagram of the slag pit blocking monitoring system of the coal-fired chain boiler.

[0011] Fig. 2 is a structural diagram of the slag pit blocking monitoring system of the coal-fired chain boiler.

[0012] In the figure, 1 is the first temperature sensor, 2 is the second temperature sensor, 3 is the third temperature sensor, 4 is the third temperature transmitter, 5 is the second temperature transmitter, 6 is the first temperature transmitter, 7 is the slag pit necking position, 8 is the slag crusher, 9 is the left slag falling channel, and 10 is the right slag falling channel. DETAILED DESCRIPTION

[0013] As Figs. 1-2As shown, a coal-fired chain boiler slag pit blockage monitoring system comprises a No. 1 temperature sensor 1 arranged at a slag pit necking portion 7 above a slag crusher 8, for monitoring the temperature of the upper part of the slag crusher 8, the No. 1 temperature sensor 1 being connected to the input end of a No. 1 temperature transmitter 6 through a lead, the No. 1 temperature transmitter 6 converting the collected temperature data into a standard electrical signal and outputting to the input end of a PLC (programmable logic controller) analog channel module; a No. 2 temperature sensor 2 arranged at a left slag falling channel 9 below the slag crusher 8, for monitoring the temperature of the left slag falling channel 9, the No. 2 temperature sensor 2 being connected to the input end of a No. 2 temperature transmitter 5 through a lead, the No. 2 temperature transmitter 5 converting the collected temperature data into a standard electrical signal and outputting to the input end of the PLC analog channel module; a No. 3 temperature sensor 3 arranged at a right slag falling channel 10 below the slag crusher 8, for monitoring the temperature of the right slag falling channel 10, the No. 3 temperature sensor 3 being connected to the input end of a No. 3 temperature transmitter 4 through a lead, the No. 3 temperature transmitter 4 converting the collected temperature data into a standard electrical signal and outputting to the input end of the PLC analog channel module; the PLC programs the collected temperature data, sets a temperature alarm threshold, and is connected to the input end of an indoor industrial computer, the indoor industrial computer monitors the temperature change of the three positions of the slag pit, and the output end of the industrial computer is connected to an indoor buzzer, and when the monitored temperature exceeds the alarm threshold, an audible and visual alarm is given.

[0014] Preferably, the No. 1 temperature sensor 1 is arranged at the center of the slag pit necking portion 7, the No. 2 temperature sensor 2 is arranged at the entrance of the left slag falling channel 9, and the No. 3 temperature sensor 3 is arranged at the exit of the right slag falling channel 10.

[0015] Preferably, the No. 1 temperature sensor 1, the No. 2 temperature sensor 2 and the No. 3 temperature sensor 3 are all K-type thermocouples.

[0016] Preferably, the PLC and the indoor industrial computer communicate through a Modbus RTU protocol.

[0017] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and not to limit it, and although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to the form and details thereof without departing from the scope defined by the claims of the present application.

Claims

1. A coal-fired chain grate boiler slag pit bridging monitoring system, characterized by, The 1st temperature sensor (1) is arranged at the slag pit necking (7) above the slag crusher, the 1st temperature sensor (1) is connected with the input end of the 1st temperature transmitter (6) through a lead wire, the output end of the 1st temperature transmitter (6) is connected with the input end of the PLC analog channel, the left slag falling channel (9) below the slag crusher is provided with the 2nd temperature sensor (2), the 2nd temperature sensor (2) is connected with the input end of the 2nd temperature transmitter (5) through a lead wire, the output end of the 2nd temperature transmitter (5) is connected with the input end of the PLC analog channel, the right slag falling channel (10) below the slag crusher is provided with the 3rd temperature sensor (3), the 3rd temperature sensor (3) is connected with the input end of the 3rd temperature transmitter (4) through a lead wire, the output end of the 3rd temperature transmitter (4) is connected with the input end of the PLC analog channel, the output end of the PLC analog channel is connected with the input end of the indoor industrial computer, and the output end of the indoor industrial computer is connected with the indoor buzzer.

2. A system for monitoring the blockage of a coal-fired chain grate boiler slag pit according to claim 1, wherein The 1st temperature sensor (1) is arranged at the center of the slag pit necking (7), the 2nd temperature sensor (2) is arranged at the entrance of the left slag falling channel (9), and the 3rd temperature sensor (3) is arranged at the outlet of the right slag falling channel (10).

3. A system for monitoring the blockage of a coal-fired chain grate boiler slag pit according to claim 1, wherein The 1st temperature sensor (1), the 2nd temperature sensor (2) and the 3rd temperature sensor (3) are all K-type thermocouples.

4. A system for monitoring the blockage of a coal-fired chain grate boiler slag pit according to claim 1, wherein The PLC and the indoor industrial computer communicate through the Modbus RTU protocol.

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