System for improving efficiency of waste liquid incinerator

Abstract

The utility model discloses a system for improving the efficiency of a waste liquid incinerator, which belongs to the technical field of waste liquid incinerators and is characterized in that an activated carbon adsorption mechanism a and a flowing activated carbon adsorption mechanism b are of the same structure, a boiler water supply pipe a is arranged on one side of a coal economizer, and a degassing film deoxidizing device is arranged on the other side of the coal economizer. The technical problem that a waste liquid incinerator is low in combustion efficiency is solved, and the device is mainly applied to waste liquid incinerators.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste liquid incinerators, and in particular is a system for improving the efficiency of waste liquid incinerators. Background Art

[0002] The working principle of thermal deoxygenation is to heat the boiler feed water to boiling point through steam, thereby reducing the solubility of oxygen and causing the oxygen in the water to continuously overflow. In this process, the generated oxygen will be discharged together with the water vapor. This deoxygenation process requires a certain amount of steam, and during the heating process, part of the water vapor will be discharged into the atmosphere together with the oxygen, resulting in a certain amount of energy loss. This means that while achieving deoxygenation, we are also facing the problem of steam consumption and energy loss. In order to improve the efficiency and energy saving of the process, we may need to further explore and optimize the deoxygenation technology to reduce energy waste and environmental impact. The main materials processed by our waste liquid incinerator are ethylene tar, styrene tar, and heavy alcohol waste liquid. The composite sodium salt produced after its incineration is extremely susceptible to moisture and hardening. In order to prevent the composite sodium salt from being stable, the existing industry waste liquid incinerator is designed to have an exhaust temperature of 200°C to ensure that the composite sodium salt does not harden in the dust collector silo. The thermal efficiency of the incinerator under this technology is generally 88%. Utility Model Content

[0003] The invention object of the utility model is to provide a system for improving the efficiency of a waste liquid incinerator, so as to solve the technical problem of low combustion efficiency of the waste liquid incinerator.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a system for improving the efficiency of a waste liquid incinerator, comprising an incineration flue gas inlet pipe, a flowing activated carbon adsorption mechanism a, a flowing activated carbon adsorption mechanism b, a bag dust collector, a ton bag, an SCR reactor, an economizer, a fan a and a chimney, the incineration flue gas inlet pipe is connected to the bag dust collector, and the flowing activated carbon adsorption mechanism a and the flowing activated carbon adsorption mechanism b are installed on the incineration flue gas inlet pipe, a ton bag is arranged under the bag dust collector, the bag dust collector is connected to the SCR reactor through a pipe a, the SCR reactor is connected to the chimney through a pipe b, and the economizer and the fan a are installed on the pipe b in sequence, characterized in that: the activated carbon adsorption mechanism a and the flowing activated carbon adsorption mechanism b have the same structure, one is on and the other is ready for operation, a boiler feed water pipe a is arranged on one side of the economizer, and a degassing membrane deoxygenation device is arranged on the other side of the economizer.

[0005] Furthermore, the activated carbon adsorption mechanism a includes a fan b, an air pipe and an activated carbon storage tank. The air pipe is installed at the air outlet of the fan b, and the air pipe is connected to the incineration flue gas inlet pipe. The activated carbon storage tank and the control valve are respectively installed on the air pipe.

[0006] Furthermore, the degassing membrane deoxygenation device includes a boiler feed water pipe b, and a membrane deaerator, a heat exchanger and an induced draft fan installed on the boiler feed water pipe b.

[0007] Furthermore, the degassing membrane of the membrane deaerator is designed to have a processing capacity of 0-45t / h, a water inlet pressure of 0.2-0.6MPa, a water inlet temperature of 5-45°C, a dissolved oxygen content of effluent from the degassing membrane of less than 35ppb, and the exhaust temperature of the chimney is reduced from 200°C to 105°C.

[0008] Technical effects and advantages of the utility model:

[0009] The deoxygenation method of the incinerator feed water has been changed from thermal deoxygenation to degassing membrane technology deoxygenation, which reduces the heating steam consumed by the original thermal deoxygenation (about 3t / h), thereby reducing the energy consumption of the device.

[0010] The application of degassing membrane technology lays the foundation for reducing the exhaust temperature of the chimney. The low-temperature deoxygenated water exchanges heat with the high-temperature flue gas, reducing the exhaust temperature from 200°C to 105°C, reducing the heat loss of the exhaust and improving the thermal efficiency of the incinerator. After the thermal calculation of the waste liquid incinerator, the thermal efficiency of the incinerator increased from 88% to 92.5%.

[0011] Compared with the traditional thermal deoxygenation process, it has the advantages of simple operation, low operating cost, no heating steam consumption, no chemical consumption, and low pressure drop (no need to set up a booster pump). BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a system diagram before the improvement of the utility model;

[0013] Figure 2 This is an improved system diagram of the utility model;

[0014] Figure 3 It is a system diagram of the activated carbon adsorption mechanism a and the flowing activated carbon adsorption mechanism b in the utility model. DETAILED DESCRIPTION

[0015] 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.

[0016] In one embodiment, see Figure 2-3The utility model provides a technical solution: a system for improving the efficiency of a waste liquid incinerator, comprising an incineration flue gas intake pipe 1, a flowing activated carbon adsorption mechanism a2, a flowing activated carbon adsorption mechanism b3, a bag filter 4, a ton bag 5, an SCR reactor 6, an economizer 7, a fan a8 and a chimney 13, the incineration flue gas intake pipe 1 is connected to the bag filter 4, the flowing activated carbon adsorption mechanism a2 and the flowing activated carbon adsorption mechanism b3 are installed on the incineration flue gas intake pipe 1, and a ton bag filter 5 is arranged below the bag filter 4. Bag 5, an air supply pipe 41 is arranged on the bag-type dust collector 4, the bag-type dust collector 4 is connected with the SCR reactor 6 through the pipe a11, the SCR reactor 6 is connected with the chimney 13 through the pipe b12, and the economizer 7 and the fan a8 are installed on the pipe b12 in sequence, which is characterized in that: the activated carbon adsorption mechanism a2 and the flowing activated carbon adsorption mechanism b3 have the same structure, one is in operation and the other is in standby mode, a boiler feed water pipe a71 is arranged on one side of the economizer 7, and a degassing membrane deoxygenation device 9 is arranged on the other side of the economizer 7.

[0017] In one embodiment, see Figure 3 The activated carbon adsorption mechanism a2 includes a fan b21, an air pipe 22 and an activated carbon storage tank 23. The air pipe 22 is installed at the air outlet of the fan b21. The air pipe 22 is connected to the combustion flue gas inlet pipe 1. The activated carbon storage tank 23 and the control valve 24 are installed on the air pipe 22 respectively.

[0018] In one embodiment, see Figure 2 The degassing membrane deoxygenation device 9 includes a boiler feed water pipe b91, and a membrane deaerator 92, a heat exchanger 93 and an induced draft fan 94 installed on the boiler feed water pipe b91. The degassing membrane of the membrane deaerator 92 has a designed processing capacity of 0-45t / h, a designed water inlet pressure of 0.2-0.6MPa, a designed water inlet temperature of 5-45°C, a designed water dissolved oxygen content of less than 35ppb, and a flue gas temperature of 200°C to 105°C. The degassing membrane technology can separate the aqueous solution from the gas (oxygen) without dispersing it. Its working principle is: in a typical operation, the liquid flows outside the hollow fiber membrane, and at the same time, the hollow fiber is vacuumed or gas purge (nitrogen) is applied inside, or a combination of the two. There are many micropores on the surface of the hydrophobic hollow fiber membrane, which allow gas molecules to pass through but can block the penetration of water molecules. Under the negative pressure of vacuum or gas purge, the gas dissolved in the liquid outside the hollow fiber membrane continuously moves into the interior of the hollow fiber membrane through the micropores and is carried away by the vacuum or purge gas, thereby achieving the purpose of removing the dissolved gas in the liquid.

[0019] The feed water of the boiler feed water pipe b91 is changed to cold desalted water at 25°C, the membrane deaerator 92 uses degassing membrane technology to deoxygenate the feed water, and a heat exchanger 93 is set at the outlet of the induced draft fan 94, and the low-temperature deoxygenated water produced by the membrane deaerator 92 is used to exchange heat with the high-temperature flue gas, which reduces the boiler exhaust temperature, reduces the exhaust heat loss, and increases the temperature of the low-temperature deoxygenated water entering the economizer 7, thereby improving the thermal efficiency of the incinerator, while not affecting the internal temperature of the dust collector and the stability of the composite sodium salt discharge.

Claims

1. A system for improving the efficiency of a waste liquid incinerator, an activated carbon adsorption mechanism a and a mobile activated carbon adsorption mechanism b, a ton bag is arranged below the bag filter, the bag filter is connected to the SCR reactor through a pipeline a, the SCR reactor is connected to the chimney through a pipeline b, an economizer and a fan a are sequentially installed on the pipeline b, characterized in that: The activated carbon adsorption mechanism a and the flowing activated carbon adsorption mechanism b have the same structure. A boiler feed water pipe a is arranged on one side of the economizer, and a degassing membrane deoxygenation device is arranged on the other side of the economizer.

2. A system for improving the efficiency of a waste liquid incinerator according to claim 1, characterized in that: The activated carbon adsorption mechanism a comprises a fan b, an air pipe and an activated carbon storage tank. The air pipe is installed at the air outlet of the fan b, and the air pipe is connected with the incineration flue gas inlet pipe. The activated carbon storage tank and the control valve are respectively installed on the air pipe.

3. The system for improving the efficiency of a waste liquid incinerator according to claim 1, characterized in that: The gas film deoxidation device comprises a boiler feed water pipe b, and a membrane deaerator, a heat exchanger and an induced draft fan installed on the boiler feed water pipe b.

4. A system for improving the efficiency of a waste liquid incinerator according to claim 3, characterized in that: The degassing membrane of the membrane deaerator is designed to have a processing capacity of 0-45t / h, a water inlet pressure of 0.2-0.6MPa, a water inlet temperature of 5-45°C, and a dissolved oxygen content of effluent from the degassing membrane of less than 35ppb.

5. The system for improving the efficiency of a waste liquid incinerator according to claim 1, characterized in that: The exhaust temperature of the chimney dropped from 200℃ to 105℃.

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