Garbage incinerator charging garbage heat value detection system

Abstract

The utility model discloses a heat value detection system for garbage entering a garbage incinerator. The heat value detection system comprises the incinerator, a laser moisture analyzer, a DCS (Distributed Control System) and a primary air inlet pipeline, the laser moisture analyzer is arranged at a furnace inlet of the incinerator, namely above a drying fire grate, moisture in primary air above garbage entering the incinerator is detected in real time through the laser moisture analyzer and sent to the DCS, and the DCS can rapidly detect the heat value change condition of the garbage entering the incinerator according to the moisture content change of the moisture in the primary air. The air temperature and the air volume of primary air entering the incinerator are controlled in advance, and the combustion stability in the garbage incinerator is kept. The real-time performance of detection data of the system is high, operation personnel or a sub-control system can be directly guided to adjust the working condition of the incinerator, the load stability is effectively improved, pollution emission is reduced, and the economic and environment-friendly benefits of garbage power generation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage incineration technical field, especially relate to a garbage incinerator furnace garbage calorific value detection system. BACKGROUND

[0002] At present, due to the complex composition of the garbage into the plant, the management level of the garbage warehouse is not the same, and other reasons, resulting in the calorific value of the garbage into the furnace changes greatly, if the operator of the incinerator does not timely find that the calorific value of the garbage into the furnace changes and operates in advance, the combustion stability of the incinerator will be destroyed. In order to meet the requirements of environmental protection index, the subsequent operator needs to operate more, even in order to invest auxiliary burner and other equipment for environmental protection parameters such as furnace temperature, which seriously affects the economic and environmental benefits of the power plant.

[0003] In the prior art, the garbage calorific value detection methods such as sampling detection and theoretical calculation are not the garbage currently entering the incinerator. Due to the timeliness and stability problems, the detection data cannot directly guide the real-time operation of production, resulting in that the production of the incinerator can only be operated passively and cannot be actively prevented in advance.

[0004] Chinese invention patent CN113327300B discloses a real-time calculation method of garbage calorific value of garbage incinerator based on thermal imaging map, which collects the thermal imaging map of the garbage into the furnace by thermal imaging camera and forms a data set by manual labeling, trains the model by U-Net full convolution neural network cycle, and combines the garbage segmentation volume output by the model with the unit volume garbage calorific value calculation to obtain the real-time calorific value of the garbage into the furnace. This method highly depends on the accuracy of the image, and can only identify the garbage put into the chute. The garbage enters the incinerator from the chute, which has a lag of more than 10 minutes.

[0005] Chinese invention patent CN108629495B discloses a garbage calorific value estimation method, which uses the furnace temperature of the incinerator, the primary air flow, the secondary air flow, the oxygen content of the boiler outlet and the chimney outlet, the system leakage coefficient, the total air volume and other parameters to comprehensively judge the calorific value of the garbage. But this method needs more data, and depends on the accuracy of the data. Moreover, it can only roughly judge the calorific value of the garbage, and the obtained calorific value data cannot be directly applied to the control system to guide production.

[0006] The calorific value of the waste into the furnace is closely related to the moisture content, the organic matter content and the composition, etc., generally, the higher the organic matter content, the higher the calorific value, and the higher the moisture content, the lower the calorific value. Generally speaking, the composition of the waste changes relatively little in a short time, but the moisture content of the waste changes greatly due to the limitation of the waste bin. Therefore, by detecting the moisture content of the waste into the furnace, the problem of sampling data lag can be overcome, the calorific value change of the waste into the furnace can be estimated, the operator is reminded to perform operations in advance, such as changing the temperature and the amount of the primary air, changing the amount of the waste into the furnace, etc., the influence of the calorific value change is minimized, the stability of the waste combustion of the incinerator can be maintained, and the economic and environmental protection benefits of the waste power generation are improved. Practical new type content

[0007] The problem to be solved by the present application is to provide a waste incinerator waste calorific value detection system, which is installed above the waste inlet of the incinerator, and detects the moisture in the primary air after penetrating through the waste into the furnace in real time.

[0008] The present application adopts the following technical scheme: a waste incinerator waste calorific value detection system, comprising: an incinerator, a laser moisture analyzer, a DCS control system, and a primary air inlet pipeline.

[0009] The waste inlet of the incinerator is connected to a waste feeding port, and the bottom of the incinerator is sequentially provided with a drying section air chamber, a combustion section air chamber and a burnout section air chamber. A primary air fan is arranged between the bottom of each air chamber and the primary air inlet pipeline, and air is blown into each air chamber by the primary air fan to provide primary air for the incinerator. The laser moisture analyzer is installed above the waste inlet of the incinerator, and detects the moisture content in the primary air after penetrating through the waste into the furnace in real time, and transmits the data to the DCS control system. The DCS control system judges the calorific value of the waste into the furnace according to the moisture content, and controls the temperature and the amount of the primary air entering the incinerator.

[0010] Preferably, the inside of the incinerator is sequentially provided with a drying grate, a combustion grate and a burnout grate in a downward inclined direction, and is connected above the drying section air chamber, the combustion section air chamber and the burnout section air chamber, respectively.

[0011] Preferably, a flue is arranged at the top end of the incinerator, the laser moisture analyzer is installed between the waste inlet and the flue, and is located above the drying grate.

[0012] Preferably, the sending end and the receiving end of the laser moisture analyzer are installed on the left and right sides of the drying grate, respectively. Laser is emitted from the sending end, penetrates through the primary air above the drying grate, interacts with the molecules in the primary air, and is received by the receiving end on the other side. The moisture content of the primary air above the drying grate is detected according to the intensity or the degree of scattering of the received light.

[0013] Preferably, the laser moisture analyzer is connected to the DCS control system through a signal cable, and the laser moisture analyzer transmits the detected primary air moisture content to the DCS control system through a 4-20Ma signal.

[0014] Preferably, the primary air inlet pipe is further provided with a preheater connected to the DCS control system.

[0015] The DCS control system draws the change of the garbage heat value according to the received moisture content data, controls the frequency of the primary air fan, adjusts the air volume of the primary air entering the incinerator from the primary air inlet pipe, and controls the preheater to exchange heat, thereby adjusting the air temperature of the primary air, increasing the primary air temperature and air volume when the heat value is low, and reducing the primary air volume and air temperature when the heat value is high.

[0016] Preferably, a chute is arranged on the upper part of the feeding port.

[0017] Compared with the prior art, the garbage incinerator garbage heat value detection system has the following technical effects:

[0018] The garbage incinerator garbage heat value detection system of the utility model installs the laser moisture analyzer above the incinerator inlet, that is, above the drying grate, utilizes the laser moisture analyzer to detect the moisture in the primary air above the incinerator in real time, judges the moisture content of the incinerator garbage by detecting the moisture content in the primary air after penetrating through the incinerator garbage, and the control system can quickly detect the change of the incinerator garbage heat value according to the change of the moisture content, thereby guiding the operator to operate in advance, maintaining the combustion stability in the garbage incinerator, and improving the economic and environmental protection benefits of garbage power generation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The garbage incinerator garbage heat value detection system of the utility model is constituted by the figure;

[0020] The reference signs in the figure are as follows: 1-incinerator; 2-laser moisture analyzer; 3-DCS control system; 4-primary air inlet pipe; 11-drying grate; 12-burning grate; 13-burning-out grate; 41-primary air fan; 42-preheater; 51-drying section air chamber, 52-burning section air chamber; 53-burning-out section air chamber; 6-feeding port; 7-flue, 8-chute. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] In an embodiment of the present application, a waste incinerator waste heat value detection system, as shown in the figure, comprises: an incinerator 1, a laser moisture analyzer 2, a DCS control system 3, and a primary air inlet pipeline 4. Figure 1

[0023] The incinerator inlet is connected to a feeding port 6, and a chute 8 is further arranged on the upper part of the feeding port 6. A drying grate 11, a combustion grate 12, and a burnout grate 13 are sequentially arranged in the incinerator 1 in a downward inclined direction. A flue 7 is connected to the top of the incinerator 1.

[0024] In use, the waste to be incinerated is fed from the feeding port 6, enters the incinerator through the chute 8, and then sequentially passes through the drying grate 11, the combustion grate 12, and the burnout grate 13 before entering the slag outlet.

[0025] Further, a drying section air chamber 51, a combustion section air chamber 52, and a burnout section air chamber 53 are sequentially arranged at the bottom of the incinerator 1 and are located below the drying grate 11, the combustion grate 12, and the burnout grate 13, respectively. The bottom of each air chamber is connected to the primary air inlet pipeline 4. A primary air fan 41 is arranged between the drying section air chamber 51, the combustion section air chamber 52, the burnout section air chamber 53, and the primary air inlet pipeline 4. The primary air fan 41 blows the air in the primary air inlet pipeline 4 into each air chamber to provide primary air to the incinerator.

[0026] Preferably, the primary air inlet pipeline 4 is further provided with a preheater 42 connected to the DCS control system 3. The DCS control system 3 controls the preheater 42 to adjust the temperature of the primary air.

[0027] As a preferred scheme of the present embodiment, the laser moisture analyzer 2 is installed between the incinerator inlet and the flue 7 and above the drying grate 11. The laser moisture analyzer 2 detects the water content in the primary air after penetrating the waste in the incinerator in real time and transmits the data to the DCS control system 3. The DCS control system 3 determines the heat value of the waste in the incinerator according to the water content.

[0028] Further, the transmitting end and the receiving end of the laser moisture analyzer 2 are installed on the left and right sides of the drying grate 11, respectively.

[0029] In use, the primary air fan 41 at the bottom of the drying section air chamber 51 blows the air in the primary air inlet pipeline 4 into the drying section air chamber 51. The primary air blows over the waste in the drying section of the incinerator 1 through the drying grate 11, taking out the moisture in the waste. The laser moisture analyzer 2 installed above the drying grate 11 detects the water content of the primary air in real time.

[0030] ​The laser emitted from the emission end of the laser moisture analyzer 2 passes through the primary air above the drying grate 11, interacts with the molecules in the primary air, is received by the receiving end on the other side, and the moisture content of the primary air above the drying grate 11 is detected according to the intensity or divergence of the received light.

[0031] After the laser moisture analyzer 2 detects the moisture content of the primary air above the drying grate 11, it transmits a 4-20Ma signal to the DCS control system 3.

[0032] Specifically, in this embodiment, after the DCS control system 3 obtains the moisture content, the following moisture content comparison and judgment are performed:

[0033] ① According to the average value of the measurement value of the laser moisture analyzer 2 for a period of time, determine the calorific value judgment threshold point: W_avg (this value is corrected regularly);

[0034] ② Obtain the current moisture content of the primary air above the drying grate: W_now;

[0035] ③ Calculate the deviation comparison value of the current moisture content of the primary air above the drying grate: W_dev = W_now-W_avg;

[0036] ④ Get the change trend W_de of the current moisture content of the primary air above the drying grate:

[0037] W_de = current calculation period W_now value - last calculation period W_now value

[0038] Further, the DCS control system 3 obtains the change of the calorific value of the garbage according to the data of the moisture content, and specifically judges as follows:

[0039] When W_dev>0 and W_de>0, it means that the current output calorific value is low and is continuously decreasing.

[0040] When W_dev>0 and W_de<0, it means that the current output calorific value is low, but is increasing.

[0041] When W_dev<0 and W_de>0, it means that the current output calorific value is high, but is decreasing.

[0042] When W_dev<0 and W_de<0, it means that the current output calorific value is high, but is increasing.

[0043] Further, the DCS control system 3 obtains the change of the calorific value of the garbage according to the data of the moisture content, controls the temperature and flow of the primary air entering the incinerator from the primary air inlet pipe 4, increases the primary air temperature and flow when the calorific value is low, and decreases the primary air flow and temperature when the calorific value is high, thereby guiding the operator to operate in advance, maintaining the stability of the combustion in the garbage incinerator, and improving the economic and environmental benefits of garbage power generation.

[0044] The above merely describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.

Claims

1. A waste incinerator waste heat value detection system characterized by, The application relates to a waste incinerator. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively.

2. The refuse incinerator refuse heat value detection system according to claim 1, characterized by, The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively.

3. The refuse incinerator refuse heat value detection system according to claim 2, characterized by, The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively.

4. The refuse incinerator refuse heat value detection system according to claim 2, characterized by, The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively.

5. The refuse incinerator refuse calorific value detection system according to claim 1, characterized by, The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively.

6. The refuse incinerator refuse calorific value detection system according to claim 5, characterized by, The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively.

7. The refuse incinerator refuse heat value detection system according to claim 6, characterized by, The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively.

8. The refuse incinerator refuse calorific value detection system according to claim 1, characterized by, The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate (11), a combustion grate (12) and a burnout grate (13) arranged in a downwardly inclined direction, and is connected to the drying section air chamber (51), the combustion section air chamber (52) and the burnout section air chamber (53) above the drying grate (11), the combustion grate (12) and the burnout grate (13) respectively. The incinerator (1) is internally provided with a drying grate

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