Sampling device for denitration reactor

Abstract

The utility model relates to a sampling device for denitration reactor, including bottom plate, the outside of bottom plate is provided with the impurity removal sampling device, the impurity removal sampling device includes buffer tank, atomizing nozzle and filter plate, the top of bottom plate is fixedly provided with buffer tank, the inner top wall of buffer tank is fixedly provided with atomizing nozzle, the filter plate is provided with the filter plate. And the interior of the buffer tank is movably connected with a filter plate. According to the sampling device for the denitration reactor, flue gas is input into the reactor body for denitration through the flue gas inlet pipe and is pumped out and discharged through the gas feeding pipe, a part of flue gas is intercepted and fed into the buffer tank through the intercepting pipe, then the water pump is started for cooling and primary impurity removal treatment, and secondary impurity removal is performed through an inorganic material plate and a precipitator in the impurity removal chamber; and then the flue gas is pumped into a sampling pump, and the flue gas subjected to impurity removal is conveyed into a gas sample analyzer for analysis, so that the aim of carrying out impurity removal treatment on the flue gas while sampling the flue gas is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration equipment, in particular to a sampling device for a denitration reactor. Background Art

[0002] Denitrification refers to the process of removing nitrogen oxides from flue gas produced by combustion. It is an important measure to reduce air pollution. Denitrification reactor is a device used to reduce or remove the emission of nitrogen oxides. It is mainly used in combustion boilers, power plants, metallurgical plants and other industrial facilities. The NOx emissions from these facilities will have an impact on the environment and human health. Therefore, it is necessary to control pollution by reducing or removing these emissions. Through the sampling device, the gas sample after denitrification can be obtained, and then the changes in composition can be analyzed through equipment such as gas sample analyzers to evaluate the denitrification effect.

[0003] However, in actual applications, since the flue gas has a high temperature and a large flow rate when passing through the exhaust duct, the sampling device is directly set at the center of the exhaust duct. After the sampling device has been used for a period of time, the sampling device will be impacted by the high-temperature and high-speed flue gas, causing equipment damage, increasing operation and maintenance costs. At the same time, the existing sampling device does not have the ability to remove impurities in the flue gas, resulting in inaccurate analysis results. Therefore, a sampling device for a denitrification reactor is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a sampling device for a denitration reactor, which has the advantages of sampling the flue gas and removing impurities from the flue gas at the same time, thus solving the problem that the impurity removal function of ordinary sampling devices needs to be improved.

[0005] To achieve the above object, the utility model provides the following technical solution: a sampling device for a denitration reactor, comprising a bottom plate, a reactor body is fixedly mounted on the top of the bottom plate, an exhaust fan is fixedly mounted on the top of the bottom plate, and an impurity removal sampling device is arranged outside the bottom plate;

[0006] The impurity removal sampling device includes a cache tank, an atomizing nozzle, a filter plate, a water tank, an inorganic material plate, a partition, a sampling pump, a gas sample analyzer and a water pump. The cache tank is fixedly installed on the top of the base plate, the atomizing nozzle is fixedly installed on the inner top wall of the cache tank, the filter plate is movably connected inside the cache tank, the water tank is fixedly installed on the top of the base plate, the inorganic material plate is fixedly installed inside the water tank, the partition is fixedly installed inside the water tank, the sampling pump is fixedly installed on the top of the water tank, the gas sample analyzer is fixedly installed on the top of the water tank, and the water pump is fixedly installed on the top of the water tank.

[0007] Furthermore, a smoke inlet pipe is fixedly installed on the left side of the reactor body, an air supply pipe is fixedly installed on the top of the reactor body, the right side of the air supply pipe is fixedly connected to the front of the exhaust fan, and a smoke exhaust pipe is fixedly installed on the right side of the exhaust fan.

[0008] Furthermore, a cut-off pipe is fixedly installed on the right side of the smoke exhaust pipe, and the right side of the cut-off pipe is fixedly connected to the left side of the cache tank. Four plug-in blocks are fixedly installed inside the cache tank, and the outer surfaces of the four plug-in blocks are movably connected to the outer surface of the filter plate.

[0009] Furthermore, the front side of the partition is a de-impurity chamber, the back side of the partition is a cooling chamber, a precipitant is provided inside the de-impurity chamber, clean water is provided inside the cooling chamber, and the number of the inorganic material plates is three, two of which have their tops fixedly connected to the inner top wall of the de-impurity chamber, and the bottom of the other inorganic material plate is fixedly connected to the inner bottom wall of the de-impurity chamber.

[0010] Furthermore, a first pipe is fixedly installed on the right side of the cache tank, the right side of the first pipe passes through the left side of the water tank and extends to the interior of the impurity removal chamber, and a second pipe is fixedly installed on the right side of the sampling pump, the right side of the second pipe passes through the right side of the water tank and extends to the interior of the impurity removal chamber.

[0011] Furthermore, the left side of the sampling pump is fixedly connected to the right side of the gas sample analyzer through a third pipe, the front of the water pump is fixedly connected to the top of the atomizing nozzle through a water supply pipe, and a water suction pipe is fixedly installed on the back of the water pump. The back of the water suction pipe passes through the top of the water tank and extends to the interior of the cooling chamber.

[0012] Beneficial Effects

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The sampling device for the denitrification reactor inputs the flue gas into the reactor body through the smoke inlet pipe for denitrification treatment, and then the denitrified flue gas will be sucked out of the reactor body by the exhaust fan through the air supply pipe and discharged through the smoke exhaust pipe. During the process, the interception pipe will intercept a part of the flue gas in the smoke exhaust pipe and send it to the buffer tank, turn on the water pump to pump out clean water, and spray it into the buffer tank after being atomized by the atomizing nozzle, and the high temperature in the flue gas is cooled by the atomized clean water, and the first step of impurity removal treatment is performed on the flue gas. The dust in the flue gas will be adsorbed and fall into the filter plate and filtered by the filter plate, and then the flue gas after cooling and preliminary impurity removal will enter the impurity removal chamber of the water tank, and the flue gas will be subjected to secondary impurity removal by the precipitant, and then the sampling pump is turned on to send the impurity-removed flue gas to the gas sample analyzer for analysis, thereby achieving the purpose of sampling the flue gas and removing impurities from the flue gas at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0016] Figure 2 This is a front sectional structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the right side of the water tank of the utility model.

[0018] In the figure: 1. bottom plate; 2. reactor body; 3. exhaust fan; 4. impurity removal sampling device; 401. buffer tank; 402. atomizing nozzle; 403. filter plate; 404. water tank; 405. inorganic material plate; 406. partition; 407. sampling pump; 408. gas sample analyzer; 409. water pump. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 , a sampling device for a denitration reactor, comprising a bottom plate 1, a reactor body 2 is fixedly mounted on the top of the bottom plate 1, an exhaust fan 3 is fixedly mounted on the top of the bottom plate 1, and an impurity removal sampling device 4 is arranged outside the bottom plate 1;

[0021] The impurity removal sampling device 4 includes a cache tank 401, an atomizing nozzle 402, a filter plate 403, a water tank 404, an inorganic material plate 405, a partition 406, a sampling pump 407, a gas sample analyzer 408 and a water pump 409. The cache tank 401 is fixedly installed on the top of the bottom plate 1, the atomizing nozzle 402 is fixedly installed on the inner top wall of the cache tank 401, the filter plate 403 is movably connected inside the cache tank 401, the water tank 404 is fixedly installed on the top of the bottom plate 1, the inorganic material plate 405 is fixedly installed inside the water tank 404, the partition 406 is fixedly installed inside the water tank 404, the sampling pump 407 is fixedly installed on the top of the water tank 404, the gas sample analyzer 408 is fixedly installed on the top of the water tank 404, and the water pump 409 is fixedly installed on the top of the water tank 404.

[0022] Specifically, Figure 2As shown, the purpose of setting the water pump 409 and the atomizing nozzle 402 is not only to cool down the flue gas and preliminarily remove impurities, but also to flush the inside of the buffer tank 401 to keep the inside of the buffer tank 401 clean. After use, the filter plate 403 can be pulled out to clean the filter plate 403 to avoid affecting the filtering effect.

[0023] Specifically, Figure 2 As shown, the principle of the reactor body 2 is based on a series of chemical and physical processes, and its core goal is to convert nitrogen oxides NOx in the flue gas into harmless nitrogen and water vapor. This process can be roughly divided into two stages: absorption and reduction. In the absorption stage, the denitrification reactor sprays ammonia or urea solution into the flue gas. When these reducing agents come into contact with NOx in the flue gas, they will undergo a chemical reaction to generate nitrogen and water. This process effectively reduces the concentration of NOx in the exhaust gas. In the reduction stage, after the absorption stage, part of the NOx in the flue gas has been converted into other compounds, which are then sent to the reduction catalyst layer of the denitrification reactor. Under the action of the catalyst, these compounds will further undergo chemical reactions and eventually be converted into harmless nitrogen and water vapor.

[0024] Specifically, Figure 2 As shown, the material of the inorganic material plate 405 is ceramic. By setting the inorganic material plate 405 of this material, the flue gas can be decontaminated in the precipitant for a sufficient time. At the same time, the inorganic material plate 405 will not chemically react with the precipitant or chemical elements in the flue gas, avoiding inaccurate data.

[0025] Specifically, Figure 2 As shown, the gas sample analyzer 408 sends the flue gas into the gas sample analyzer 408 through the sampling pump 407, and then detects the concentration of various components in the gas sample through the internal sensor, and converts the detected signal into an electrical signal output. Finally, data analysis is the process of processing and interpreting the signal detected by the sensor, which may include steps such as signal amplification, filtering, calibration and conversion, so as to obtain accurate gas composition and concentration information.

[0026] When implementing, follow these steps:

[0027] 1) First, the flue gas is sent into the reactor body 2 through the smoke inlet pipe for degassing, and then it is drawn out of the reactor body 2 through the exhaust fan 3 and discharged through the smoke exhaust pipe;

[0028] 2) Then, a portion of the flue gas is intercepted through the interception pipe and enters the buffer tank 401, and the water pump 409 is turned on to pump clean water from the water tank 404, and the atomizing nozzle 402 is used to cool the flue gas and preliminarily remove impurities;

[0029] 3) The impurities in the flue gas will be absorbed by the atomized clean water, and then sent to the impurity removal chamber for secondary impurity removal;

[0030] 4) Finally, the smoke after impurity removal is sent to the gas sample analyzer 408 for analysis through the sampling pump 407.

[0031] In summary, the sampling device for the denitrification reactor inputs the flue gas into the reactor body 2 through the smoke inlet pipe for denitrification treatment, and then the denitrified flue gas is sucked out of the reactor body 2 through the air supply pipe by the exhaust fan 3 and discharged through the smoke exhaust pipe. During the process, the interception pipe will intercept a part of the flue gas in the smoke exhaust pipe and send it to the buffer tank 401. The water pump 409 is turned on to pump out clean water, and it is sprayed into the buffer tank 401 after being atomized by the atomizing nozzle 402. The high The temperature is lowered and the flue gas is subjected to the first step of impurity removal treatment. The dust in the flue gas will be adsorbed and fall into the filter plate 403 and filtered by the filter plate 403. The flue gas after cooling and preliminary impurity removal will enter the impurity removal chamber of the water tank 404. The flue gas will be subjected to secondary impurity removal by the precipitant. Then the sampling pump 407 is called to send the impurity-removed flue gas to the gas sample analyzer 408 for analysis, thereby achieving the purpose of removing impurities from the flue gas while sampling the flue gas.

[0032] 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] 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 sampling device for a denitration reactor, comprising a bottom plate (1), characterized in that: A reactor body (2) is fixedly mounted on the top of the bottom plate (1), an exhaust fan (3) is fixedly mounted on the top of the bottom plate (1), and an impurity removal sampling device (4) is arranged outside the bottom plate (1); The impurity removal sampling device (4) comprises a buffer tank (401), an atomizing nozzle (402), a filter plate (403), a water tank (404), an inorganic material plate (405), a partition (406), a sampling pump (407), a gas sample analyzer (408) and a water pump (409). The buffer tank (401) is fixedly mounted on the top of the bottom plate (1), the atomizing nozzle (402) is fixedly mounted on the inner top wall of the buffer tank (401), and the internal movable connection of the buffer tank (401) A filter plate (403) is connected, a water tank (404) is fixedly installed on the top of the bottom plate (1), an inorganic material plate (405) is fixedly installed inside the water tank (404), a partition (406) is fixedly installed inside the water tank (404), a sampling pump (407) is fixedly installed on the top of the water tank (404), a gas sample analyzer (408) is fixedly installed on the top of the water tank (404), and a water pump (409) is fixedly installed on the top of the water tank (404).

2. A sampling device for a denitration reactor according to claim 1, characterized in that: A smoke inlet pipe is fixedly installed on the left side of the reactor body (2), an air supply pipe is fixedly installed on the top of the reactor body (2), the right side of the air supply pipe is fixedly connected to the front side of the exhaust fan (3), and a smoke exhaust pipe is fixedly installed on the right side of the exhaust fan (3).

3. A sampling device for a denitration reactor according to claim 2, characterized in that: A cut-off pipe is fixedly installed on the right side of the smoke exhaust pipe, and the right side of the cut-off pipe is fixedly connected to the left side of the buffer tank (401). Four plug-in blocks are fixedly installed inside the buffer tank (401), and the outer surfaces of the four plug-in blocks are movably connected to the outer surface of the filter plate (403).

4. A sampling device for a denitration reactor according to claim 1, characterized in that: The front of the partition (406) is a de-impurity chamber, and the back of the partition (406) is a cooling chamber. A precipitant is arranged inside the de-impurity chamber, and clean water is arranged inside the cooling chamber. The number of the inorganic material plates (405) is three, wherein the tops of two of the inorganic material plates (405) are fixedly connected to the inner top wall of the de-impurity chamber, and the bottom of the other inorganic material plate (405) is fixedly connected to the inner bottom wall of the de-impurity chamber.

5. A sampling device for a denitration reactor according to claim 4, characterized in that: A first pipe is fixedly installed on the right side of the cache tank (401), and the right side of the first pipe passes through the left side of the water tank (404) and extends to the interior of the impurity removal chamber. A second pipe is fixedly installed on the right side of the sampling pump (407), and the right side of the second pipe passes through the right side of the water tank (404) and extends to the interior of the impurity removal chamber.

6. A sampling device for a denitration reactor according to claim 4, characterized in that: The left side of the sampling pump (407) is fixedly connected to the right side of the gas sample analyzer (408) via a third pipe, the front of the water pump (409) is fixedly connected to the top of the atomizing nozzle (402) via a water supply pipe, and a water suction pipe is fixedly installed on the back of the water pump (409), and the back of the water suction pipe passes through the top of the water tank (404) and extends to the interior of the cooling chamber.

Images