Device for regenerating denitration catalyst

Abstract

The utility model discloses a device for regenerating a denitration catalyst, and relates to the technical field of catalysts. According to the technical scheme, the device comprises a cleaning tank and a wastewater treatment tank, a to-be-regenerated catalyst and a cleaning agent are placed in the cleaning tank, a bubbler, a first pH meter and a conductivity meter are arranged in the cleaning tank, the cleaning tank is connected with the wastewater treatment tank through a pipeline, and the wastewater treatment tank is connected with a blow-off pipeline and is connected with a flocculant storage tank through a pipeline; and the cleaning tank and the wastewater treatment tank are respectively connected with the acid storage tank and the alkali storage tank through pipelines. Harmful elements in the waste catalyst are removed in a physical cleaning and chemical cleaning combined mode, the cleaning degree of the catalyst is judged according to the conductivity and the pH value detected in real time, cleaning parameters are optimized accordingly, and therefore the cleaning efficiency and the cleaning effect are improved.

Description

Technical Field

[0001] This utility model relates to the field of catalyst technology, specifically to a device for regenerating denitrification catalysts. Background Technology

[0002] Denitrification catalysts gradually lose their catalytic activity during long-term use; this phenomenon is known as catalyst deactivation. The main reason for catalyst deactivation is the gradual accumulation of a series of harmful elements, such as arsenic (As), thallium (Tl), and phosphorus (P), on the catalyst surface and in its internal pores. The accumulation of these harmful elements not only hinders the effective contact between the catalyst and reactants but may also severely affect the catalyst's performance by poisoning the active sites.

[0003] To address this issue, catalyst regeneration is typically achieved through cleaning. Existing cleaning methods are mainly divided into two categories: physical cleaning and chemical cleaning. Physical cleaning methods can remove some harmful elements from the catalyst surface to a certain extent. However, for harmful elements that have penetrated deep into the catalyst pores or are tightly bound to the active components of the catalyst, physical cleaning methods are often ineffective.

[0004] Therefore, chemical cleaning methods have become key to removing these stubborn and harmful elements. Chemical cleaning typically involves using chemical reagents such as acids and alkalis to remove or transform harmful elements from the surface or internal pores of the catalyst into soluble substances through chemical reactions such as oxidation and reduction, thereby achieving the purpose of removal.

[0005] However, the current cleaning process for denitrification catalysts still has significant limitations. This process relies heavily on operator experience and lacks scientific and systematic data support. For example, key parameters such as the cleaning time, chemical dosage, and heating temperature during the cleaning process are often set based on experience. This empiricist operating mode leads to unstable cleaning results and may even cause secondary damage to the catalyst and shorten its service life due to improper control of cleaning conditions.

[0006] Therefore, in order to improve the cleaning efficiency and effectiveness of denitrification catalysts and extend their service life, it is urgent to develop a device that can accurately control cleaning parameters and optimize the cleaning process. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a device for regenerating denitrification catalysts. The device removes harmful elements from waste catalysts by combining physical and chemical cleaning, and judges the degree of catalyst cleaning based on the real-time detection of conductivity and pH value. Based on this, the cleaning parameters are optimized to improve cleaning efficiency and effect.

[0008] The technical solution of this utility model is as follows:

[0009] The apparatus for regenerating denitrification catalysts includes a cleaning tank and a wastewater treatment tank. The catalyst to be regenerated and the cleaning agent are placed in the cleaning tank, which is equipped with a bubbler, a pH meter, and a conductivity meter. The cleaning tank is connected to the wastewater treatment tank via a pipe, and the wastewater treatment tank is connected to a sewage pipe and a flocculant storage tank via a pipe. The cleaning tank and the wastewater treatment tank are respectively connected to an acid storage tank and an alkali storage tank via pipes.

[0010] Preferably, the cleaning tank is equipped with a heating mechanism and a temperature sensor.

[0011] Preferably, the heating mechanism uses an electric heating wire.

[0012] Preferably, an ultrasonic generator is provided in the cleaning tank.

[0013] Preferably, the ultrasonic generator is disposed at the bottom and on the inner wall of the cleaning tank.

[0014] Preferably, the cleaning tank is equipped with a level gauge.

[0015] Preferably, the wastewater treatment tank is equipped with a level gauge.

[0016] Preferably, the wastewater treatment tank is equipped with a stirring mechanism.

[0017] Preferably, a pH meter is installed in the wastewater treatment tank.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] The device for regenerating denitrification catalysts of this invention infers the cleaning effect and reaction process based on the changes in pH value and conductivity during catalyst regeneration with cleaning agents. It can more accurately control parameters such as cleaning time and chemical agent dosage, thereby improving the accuracy of catalyst regeneration, ensuring the cleaning effect, and protecting the catalyst from damage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the device for regenerating denitrification catalyst according to this utility model.

[0021] In the diagram, 1. Cleaning tank; 101. Bubble blower; 102. pH meter 1; 103. Conductivity meter; 104. Heating mechanism; 105. Temperature sensor; 106. Ultrasonic generator; 107. Level gauge 1; 2. Wastewater treatment tank; 201. Sewage pipe; 202. Level gauge 2; 203. Stirring mechanism; 204. pH meter 2; 3. Flocculant storage tank; 4. Acid storage tank; 5. Alkali storage tank. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model.

[0023] Example 1

[0024] like Figure 1 As shown, this embodiment provides an apparatus for regenerating a denitrification catalyst, including a cleaning tank 1 and a wastewater treatment tank 2. The catalyst to be regenerated and the cleaning agent are placed in the cleaning tank 1. The cleaning tank 1 is equipped with a bubbler 101, a pH meter 102, a conductivity meter 103, and a level gauge 107. The cleaning tank 1 is connected to the wastewater treatment tank 2 through a pipe. The wastewater treatment tank 2 is connected to a sewage pipe 201 and is also connected to a flocculant storage tank 3 through a pipe. The wastewater treatment tank 2 is equipped with a level gauge 202, a stirring mechanism 203, and a pH meter 204. The cleaning tank 1 and the wastewater treatment tank 2 are respectively connected to an acid storage tank 4 and an alkali storage tank 5 through pipes.

[0025] Working principle:

[0026] The cleaning tank 1 contains cleaning agents. The catalyst to be regenerated is placed in the cleaning tank 1, and some harmful elements continuously enter the cleaning agents, causing changes in the pH and conductivity of the cleaning agents. A pH meter 102 and a conductivity meter 103 monitor the pH and conductivity of the cleaning agents in real time and feed the signals back to the control system. A pH and conductivity change curve is generated on the computer. When the detected pH and conductivity remain essentially constant, the physical cleaning of the catalyst can be considered complete. Subsequently, acid or alkali is added to the cleaning tank 1 through acid storage tank 4 and alkali storage tank 5 to chemically clean the catalyst. For example, acid can dissolve certain metal oxides in the catalyst, while alkali can remove them by forming complexes with certain harmful elements. During the chemical cleaning process, the pH and conductivity of the cleaning agents are also monitored in real time using pH meter 102 and conductivity meter 103. When the detected pH and conductivity remain essentially constant, the chemical cleaning of the catalyst can be considered complete. The bubbler 101 in the cleaning tank 1 can introduce gas into the cleaning tank 1 to generate bubbles, clean harmful elements on the surface of the catalyst, and enhance the mixing and reaction effect of cleaning agents, acids and alkalis.

[0027] After cleaning, the cleaning agent in cleaning tank 1 is discharged into wastewater treatment tank 2 through a pipeline. Flocculant is added to wastewater treatment tank 2 through flocculant storage tank 3 to flocculate the wastewater and reduce heavy metal ions. During the treatment process, the wastewater is stirred by stirring mechanism 203 to accelerate the flocculation rate. After flocculation, acid and alkali are added to wastewater treatment tank 2 through acid storage tank 4 and alkali storage tank 5 to adjust the pH of the wastewater to neutral. Finally, the treated wastewater is discharged through sewage pipe 201. Throughout the catalyst regeneration process, the liquid levels in cleaning tank 1 and wastewater treatment tank 2 can be detected by level gauge 107 and level gauge 202 to determine the volume of cleaning agent and wastewater, thus aiding in the calculation of the dosage of each agent.

[0028] The device in this embodiment can infer the cleaning effect and reaction process based on the changes in pH value and conductivity during catalyst regeneration. It can more accurately control parameters such as cleaning time and chemical reagent dosage, improve the accuracy of catalyst regeneration, ensure the cleaning effect, and protect the catalyst from damage.

[0029] Example 2

[0030] Based on Example 1, such as Figure 1 As shown, the cleaning tank 1 is equipped with a heating mechanism 104 and a temperature sensor 105. The heating mechanism 104 uses an electric heating wire. The electric heating wire, together with the temperature sensor 105, can control the temperature of the cleaning agent in the cleaning tank 1 (e.g., 50-90℃) to optimize the chemical reaction rate during the regeneration process and improve the regeneration efficiency.

[0031] Example 3

[0032] Based on Example 1, such as Figure 1 As shown, an ultrasonic generator 106 is installed in the cleaning tank 1, and the ultrasonic generator 106 is installed at the bottom and on the inner wall of the cleaning tank 1. The ultrasonic generator 106 can generate ultrasonic waves, which remove harmful elements from the surface of the catalyst through cavitation effect, improve the catalyst regeneration efficiency, and ensure the regeneration effect.

Claims

1. An apparatus for regenerating a denitrification catalyst, characterized in that, The system includes a cleaning tank (1) and a wastewater treatment tank (2). The catalyst to be regenerated and the cleaning agent are placed in the cleaning tank (1). The cleaning tank (1) is equipped with a bubbler (101), a pH meter (102) and a conductivity meter (103). The cleaning tank (1) is connected to the wastewater treatment tank (2) through a pipe. The wastewater treatment tank (2) is connected to a sewage pipe (201) and is connected to a flocculant storage tank (3) through a pipe. The cleaning tank (1) and the wastewater treatment tank (2) are respectively connected to an acid storage tank (4) and an alkali storage tank (5) through pipes.

2. The apparatus for regenerating a denitrification catalyst as described in claim 1, characterized in that, The cleaning tank (1) is equipped with a heating mechanism (104) and a temperature sensor (105).

3. The apparatus for regenerating a denitrification catalyst as described in claim 2, characterized in that, The heating mechanism (104) uses an electric heating wire.

4. The apparatus for regenerating a denitrification catalyst as described in claim 1, characterized in that, An ultrasonic generator (106) is installed in the cleaning tank (1).

5. The apparatus for regenerating a denitrification catalyst as described in claim 4, characterized in that, The ultrasonic generator (106) is installed at the bottom and on the inner wall of the cleaning tank (1).

6. The apparatus for regenerating a denitrification catalyst as described in claim 1, characterized in that, The cleaning tank (1) is equipped with a level gauge (107).

7. The apparatus for regenerating a denitrification catalyst as described in claim 1, characterized in that, The wastewater treatment tank (2) is equipped with a level gauge (202).

8. The apparatus for regenerating a denitrification catalyst as described in claim 1, characterized in that, The wastewater treatment tank (2) is equipped with a stirring mechanism (203).

9. The apparatus for regenerating a denitrification catalyst as described in claim 1, characterized in that, The wastewater treatment tank (2) is equipped with a pH meter 204.

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