Energy-saving waste gas treatment heating device

Abstract

An energy-saving waste gas treatment heating device comprises an air duct, an air inlet is formed in the bottom of the air duct, an air outlet is formed in the top of the air duct, a heater used for heating waste gas is installed in the air duct, and the heater comprises at least two electric heating pipe sets sequentially arranged in the air duct from top to bottom. The electric heating pipes in each electric heating pipe set are vertically arranged, and the electric heating pipes in the same electric heating pipe set are evenly distributed in the transverse direction of the air flue. The distance between the electric heating pipes in the higher electric heating pipe set is smaller than the distance between the electric heating pipes in the lower electric heating pipe set, and the heating temperature of the electric heating pipes in the higher electric heating pipe set is larger than the heating temperature of the electric heating pipes in the lower electric heating pipe set. The tail gas treatment device has high-efficiency heating performance, and is beneficial to reducing the operation load and reducing the fault occurrence probability, so that the tail gas treatment efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to an energy-saving waste gas treatment heating device. Background Art

[0002] According to the "Petrochemical Industry Pollutant Emission Standards" and the Jiangsu Province Comprehensive Emission Standards for Air Pollutants, the requirements for exhaust emission indicators are becoming increasingly stringent. At present, the mainstream exhaust gas treatment solution in the industry adopts a process treatment route of condensation + adsorption + catalytic oxidation + denitrification. The principle of catalytic oxidation is: the exhaust gas leaving the refrigeration unit and the air are mixed in a mixing tank, and the mixed exhaust gas is preheated by the exhaust gas heat exchanger, and then enters the heater to be heated to 400°C after being premixed with the air, and then enters the catalytic oxidation reactor. A catalytic oxidation reaction is carried out in the C0 reactor. The reaction bed temperature is controlled at 400°C to convert volatile organic matter into carbon dioxide and nitrogen oxides. The exhaust gas after the CO reaction is about 430°C. After being cooled by the exhaust air-cooled cooler, it enters the denitrification unit; however, in order to ensure the exhaust gas treatment effect, the heating efficiency of the heater used is low and it needs to be in a high-load operation state for a long time, which can easily cause a high-temperature alarm of the heater, consume a lot of energy and affect the exhaust gas treatment efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an energy-saving exhaust gas treatment heating device with high heating efficiency, which helps to reduce the operating load, save energy and reduce consumption, and at the same time reduce the probability of failure, thereby ensuring the exhaust gas treatment efficiency.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions. The utility model is an energy-saving exhaust gas treatment heating device, including an air duct for exhaust gas circulation, the air duct is vertically arranged, an air inlet is arranged at the bottom of the air duct, and an air outlet is arranged at the top of the air duct. A heater for heating the exhaust gas is installed in the air duct, and the heater includes at least two electric heating tube groups arranged in the air duct from top to bottom, and the electric heating tubes in each electric heating tube group are vertically arranged, and the electric heating tubes in the same electric heating tube group are uniformly distributed along the horizontal direction of the air duct. In the two upper and lower adjacent electric heating tube groups, the distance between the electric heating tubes in the higher electric heating tube group is less than the distance between the electric heating tubes in the lower electric heating tube group, and the heating temperature of the electric heating tubes in the higher electric heating tube group is greater than the heating temperature of the electric heating tubes in the lower electric heating tube group.

[0005] The technical problem to be solved by the utility model can also be further achieved through the following technical solutions. For the energy-saving exhaust gas treatment and heating device described above, each electric heating tube group also includes an upper bracket and a lower bracket. The upper bracket and the lower bracket are installed in parallel in the air duct, and the two ends of the electric heating tube are respectively installed on the upper bracket and the lower bracket. Vents that cooperate with the exhaust gas are provided on the upper bracket and the lower bracket.

[0006] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the energy-saving exhaust gas treatment heating device described above, the heater includes 3-5 electric heating tube groups.

[0007] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the energy-saving exhaust gas treatment heating device described above, the heater includes 3 electric heating tube groups.

[0008] The technical problem to be solved by the present invention can also be further achieved through the following technical solutions. For the energy-saving exhaust gas treatment heating device described above, the electric heating tube is a stainless steel electric heating tube, a ceramic electric heating tube or a quartz tube electric heating tube.

[0009] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the energy-saving exhaust gas treatment and heating device described above, a temperature meter is also installed on the air duct on one side of the air outlet.

[0010] The technical problem to be solved by the present invention can be further achieved through the following technical solution. For the energy-saving exhaust gas treatment and heating device described above, 3-4 temperature instruments are provided, and the 3-4 temperature instruments are evenly distributed along the circumference of the air duct.

[0011] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the energy-saving exhaust gas treatment and heating device described above, an insulation layer, a protective plate and a supporting steel frame are also installed on the outside of the air duct.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. Improve heating efficiency: The electric heating tube of the utility model is installed vertically. When the exhaust gas passes through the air duct, it can fully contact with the electric heating tube, so that the exhaust gas is quickly heated, which helps to improve the heating efficiency, help reduce the operating load, and save energy and reduce consumption;

[0014] 2. Reduce the failure rate: The electric heating tube of the utility model has high heating efficiency and does not need to be operated at high load for a long time. In addition, since the heat distribution is more uniform, the risk of failure caused by local overheating can also be reduced, thereby reducing the probability of failure;

[0015] 3. Ensure the efficiency of exhaust gas treatment: The utility model significantly improves the heating efficiency of exhaust gas, enabling it to quickly reach the required temperature, providing favorable conditions for subsequent catalytic oxidation treatment, thereby ensuring the high efficiency of exhaust gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of an installation structure of the electric heating tube of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0019] Reference Figure 1-2 An energy-saving exhaust gas treatment and heating device comprises an air duct 1 for exhaust gas circulation, the air duct 1 is vertically arranged, an air inlet 2 is arranged at the bottom of the air duct 1, and an air outlet 3 is arranged at the top of the air duct 1, so that the exhaust gas enters the air duct 1 from the bottom of the air duct 1 and is output from the top of the air duct 1, so that the exhaust gas can automatically enter and exit the air duct 1, no additional power is required, or the use of external power can be minimized;

[0020] In order to achieve the addition of exhaust gas, a heater for heating the exhaust gas is installed in the air duct 1, and the heater includes at least two electric heating tube groups arranged in the air duct 1 from top to bottom, and the electric heating tubes 4 in each electric heating tube group are arranged vertically, and the electric heating tubes 4 in the same electric heating tube group are evenly distributed along the horizontal direction of the air duct 1. A heating gap is left between the electric heating tubes 4 to match the exhaust gas circulation, so as to facilitate comprehensive, rapid and uniform heating of the exhaust gas entering the air duct 1;

[0021] Preferably, the heater includes 3-5 electric heating tube groups, and further preferably, the heater includes 3 electric heating tube groups.

[0022] In order to further improve the heating efficiency, in the two adjacent electric heating tube groups, the distance between the electric heating tubes 4 in the higher electric heating tube group is smaller than the distance between the electric heating tubes 4 in the lower electric heating tube group, and the heating temperature of the electric heating tubes 4 in the higher electric heating tube group is greater than the heating temperature of the electric heating tubes 4 in the lower electric heating tube group, so that the spacing between the higher electric heating tubes 4 is smaller, and the heating temperature of the higher electric heating tubes 4 is also higher (the power of the higher electric heating tubes 4 may be greater), so that after the exhaust gas enters the air duct 1 through the bottom of the air duct 1, the more heat it can receive as it moves upward, and the faster the temperature rises, so that the exhaust gas can fully contact with the electric heating tubes 4 for heating and quickly reach the expected temperature;

[0023] Specifically, each electric heating tube group also includes an upper bracket 5 and a lower bracket 6, which are installed in parallel in the air duct 1, and the two ends of the electric heating tube 4 are respectively installed on the upper bracket 5 and the lower bracket 6, and the upper bracket 5 and the lower bracket 6 are provided with air vents 8 that cooperate with the exhaust gas.

[0024] Preferably, the electric heating tube 4 is a stainless steel electric heating tube 4, a ceramic electric heating tube 4 or a quartz tube electric heating tube 4, all of which have good thermal conductivity, can efficiently convert electrical energy into thermal energy, quickly heat the exhaust gas to the required temperature, and are stable and suitable for high temperature, corrosion-resistant working environments.

[0025] In order to control the heating temperature of the exhaust gas, a temperature meter 7 is also installed on the air duct 1 on one side of the air outlet 3, which is used to detect the temperature of the exhaust gas output from the air duct 1, so as to check whether the exhaust gas temperature reaches the expected value, so as to adjust the heating temperature of the electric heating tube 4 according to the actual situation and ensure the heating effect of the exhaust gas. Preferably, 3-4 temperature meters 7 are provided, and the 3-4 temperature meters 7 are evenly distributed along the circumference of the air duct 1.

[0026] In actual use, an insulation layer, a protective plate and a supporting steel frame are installed on the outside of the air duct 1 to minimize the heat loss inside the air duct 1, while facilitating the installation and fixation of the air duct 1 and cooperating with external exhaust gas treatment equipment to achieve exhaust gas treatment.

[0027] The energy-saving exhaust gas treatment and heating device provided by the utility model has been put into practical use. The transformation plan is to replace the original air duct, specifically:

[0028] 1. Remove equipment pipes and heaters;

[0029] 2. Remove the outer protective plate on the side of the equipment, remove the insulation, and cut off part of the steel frame cross brace;

[0030] 3. Cut off the original heater air duct and lift it out;

[0031] 4. Remake the air duct and match the heater;

[0032] 5. Install the heater;

[0033] 6. Restore the equipment air inlet pipes, steel frames, insulation and outer panels;

[0034] 7. Purge the entire machine.

[0035] By means of the energy-saving exhaust gas treatment and heating device provided by the utility model, the exhaust gas can fully contact with the electric heating tube when passing through the air duct, and quickly reach the expected heating temperature, thereby facilitating improving the heating efficiency of the heater, reducing the operating load of the heater, and contributing to energy conservation and consumption reduction.

Claims

1. An energy-saving exhaust gas treatment and heating device, characterized in that: The invention comprises an air duct for exhaust gas circulation, which is vertically arranged, an air inlet is arranged at the bottom of the air duct, an air outlet is arranged at the top of the air duct, a heater for heating the exhaust gas is installed in the air duct, the heater comprises at least two electric heating tube groups which are arranged in the air duct from top to bottom, the electric heating tubes in each electric heating tube group are vertically arranged, the electric heating tubes in the same electric heating tube group are uniformly distributed along the transverse direction of the air duct, and in two upper and lower adjacent electric heating tube groups, the distance between the electric heating tubes in the higher electric heating tube group is smaller than the distance between the electric heating tubes in the lower electric heating tube group, and the heating temperature of the electric heating tubes in the higher electric heating tube group is greater than the heating temperature of the electric heating tubes in the lower electric heating tube group.

2. The energy-saving exhaust gas treatment and heating device according to claim 1 is characterized in that: Each electric heating tube group also includes an upper bracket and a lower bracket, which are installed in parallel in the air duct. The two ends of the electric heating tube are respectively installed on the upper bracket and the lower bracket. Vents that cooperate with exhaust gas are provided on the upper bracket and the lower bracket.

3. The energy-saving exhaust gas treatment and heating device according to claim 1 is characterized in that: The heater comprises 3-5 electric heating tube groups.

4. The energy-saving exhaust gas treatment and heating device according to claim 3 is characterized in that: The heater comprises three electric heating tube groups.

5. The energy-saving exhaust gas treatment and heating device according to claim 1 or 3, characterized in that: The electric heating tube is a stainless steel electric heating tube, a ceramic electric heating tube or a quartz tube electric heating tube.

6. The energy-saving exhaust gas treatment and heating device according to claim 1 is characterized in that: A temperature meter is also installed on the air duct on the air outlet side.

7. The energy-saving exhaust gas treatment and heating device according to claim 6 is characterized in that: There are 3-4 temperature instruments, which are evenly distributed along the circumference of the air duct.

8. The energy-saving exhaust gas treatment and heating device according to claim 1 is characterized in that: An insulation layer, a protective plate and a supporting steel frame are also installed on the outside of the air duct.

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