High-temperature flue gas cooling incinerator for waste liquid containing low-melting-point salt

Abstract

The high-temperature flue gas cooling incinerator comprises a vertical incinerator body and a combustor, an inner cavity of the incinerator body is divided into a combustion chamber located on the upper portion and a cooling chamber located on the lower portion, the combustor is installed on the top of the inner cavity of the incinerator body, and a nozzle of the combustor vertically extends downwards to the combustion chamber. A water cooling wall is arranged between the portion, at the combustion chamber, of the boiler body and the heat insulation layer, a cooling chamber outlet communicated with the outside is formed in the side wall of the cooling chamber, a circulating smoke distribution box is arranged in the middle of the boiler body, and the circulating smoke distribution box is communicated with the boiler body through a plurality of smoke spraying pipes. The combustion chamber adopts a water-cooled wall structure, so that the surface temperature of a refractory material is reduced, the erosion of ash is reduced, and the service life of the refractory material is prolonged; the low-temperature flue gas at the outlet of the dust remover is mixed with the high-temperature flue gas at the outlet of the combustion chamber, so that the temperature of the flue gas is effectively reduced, the low-melting-point salt is fully condensed, the formed loose ash is not easy to adhere to a heated surface, and ash discharge is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid incineration treatment technology, specifically a high-temperature flue gas cooling incinerator for waste liquid containing low-melting-point salts. Background Technology

[0002] Liquid jet incinerators are used to treat liquid waste that can be pumped. They have a simple structure, equipped with one or more burners. Waste liquid is atomized into fine droplets through nozzles and burned in suspension within the high-temperature flame zone. The high-temperature chemical reaction process destroys the molecular structure of various harmful substances, oxidizing the waste liquid into carbon dioxide and water, thus achieving environmentally compliant emissions. For the combustion of waste liquid containing low-melting-point salts, the high-temperature flue gas produced after incineration contains a large amount of molten ash. If cooling is insufficient, this ash easily adheres to the furnace wall, forming large clumps, or adheres to the heated surfaces, affecting heat transfer efficiency and even clogging the flue. Furthermore, it easily condenses at the ash discharge port, causing poor ash removal. Under high-temperature conditions, the refractory material in the furnace is also corroded by the ash, and is prone to loosening and falling off after a short period of operation. Utility Model Content

[0003] The purpose of this invention is to provide a high-temperature flue gas cooling incinerator for waste liquid containing low-melting-point salts, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature flue gas cooling incinerator containing low-melting-point salt waste liquid, comprising a vertical furnace body and a burner. The inner wall of the furnace body is covered with a heat insulation layer. The inner cavity of the furnace body is divided into an upper combustion chamber and a lower cooling chamber. The burner is installed at the top of the inner cavity of the furnace body, and the burner nozzle extends vertically downward into the combustion chamber. A water-cooled wall is provided between the furnace body and the heat insulation layer at the combustion chamber. The side wall of the cooling chamber is provided with a cooling chamber outlet connected to the outside. A circulating flue gas distribution box is provided in the middle of the furnace body. The circulating flue gas distribution box is connected to the furnace body through several flue gas nozzles. The outer side of the circulating flue gas distribution box is provided with a smoke box inlet connected to the inside.

[0005] Preferably, the bottom of the furnace body has a conical bucket structure and an ash discharge port that runs vertically through the bottom of the furnace body.

[0006] Preferably, the circulating flue gas distribution box is located at the top of the cooling chamber.

[0007] Compared with the prior art, the beneficial effects of this utility model are: the combustion chamber adopts a water-cooled wall structure, which reduces the temperature of the refractory material surface during use, reduces the erosion of ash and slag, and extends the service life of the refractory material; by using the low-temperature flue gas at the dust collector outlet to mix with the high-temperature flue gas at the combustion chamber outlet, the temperature of the flue gas is effectively reduced, so that the low-melting-point salts can fully condense to form loose ash and slag that is not easy to stick to the heated surface and is conducive to ash removal. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model.

[0009] In the diagram: 1. Furnace body; 2. Burner; 3. Combustion chamber; 4. Cooling chamber; 5. Water-cooled wall; 6. Cooling chamber outlet; 7. Insulation layer; 8. Circulating flue gas distribution box; 9. Flue gas nozzle; 10. Smoke box inlet. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0011] Please see Figure 1 This utility model provides a technical solution: a high-temperature flue gas cooling incinerator containing low-melting-point salt waste liquid, including a vertical furnace body 1 and a burner 2. The inner wall of the furnace body 1 is covered with a heat insulation layer 7. The inner cavity of the furnace body 1 is divided into a combustion chamber 3 located in the upper part and a cooling chamber 4 located in the lower part. The bottom of the furnace body 1 is a cone structure and an ash discharge port that runs through the furnace from top to bottom is provided at the bottom of the furnace body 1. The ash discharge port is used to discharge ash from inside the furnace to the outside.

[0012] Burner 2 is installed at the top of the inner cavity of furnace body 1, with its nozzle extending vertically downwards into combustion chamber 3 (the nozzle for spraying waste liquid is also located on burner 2). A water-cooled wall 5 is installed between furnace body 1 and insulation layer 7 in combustion chamber 3. When burning waste liquid, the water-cooled wall 5 is connected to cooling water to reduce the temperature of insulation layer 7 in combustion chamber 3 and extend the service life of refractory material. The side wall of cooling chamber 4 is provided with cooling chamber outlet 6 connected to the outside. A circulating flue gas distribution box 8 is provided in the middle of furnace body 1. The circulating flue gas distribution box 8 is located at the top of cooling chamber 4 and is connected to furnace body 1 through several flue gas nozzles 9. The outer side of the circulating flue gas distribution box 8 is provided with a smoke box inlet 10 connected to the inside. The discharged low-temperature flue gas is circulated to smoke box inlet 10 through a pipe and enters the interior of furnace body 1 through flue gas nozzles 9 to mix with high-temperature gas, effectively reducing the temperature of flue gas and allowing low-melting-point salts to fully condense.

[0013] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature flue gas cooling incinerator for low-melting salt waste liquid, comprising a vertical furnace body (1) and a burner (2), the inner wall of the furnace body (1) is covered with a heat insulation layer (7), characterized in that: The inner cavity of the furnace body (1) is divided into a combustion chamber (3) at the upper part and a cooling chamber (4) at the lower part, the burner (2) is installed at the top of the inner cavity of the furnace body (1) and the nozzle of the burner (2) vertically extends downward to the combustion chamber (3), a water cooling wall (5) is arranged between the furnace body (1) and the heat insulation layer (7) at the combustion chamber (3), the side wall of the cooling chamber (4) is provided with a cooling chamber outlet (6) connected to the outside, a circulating flue gas distribution box (8) is arranged at the middle part of the furnace body (1), the circulating flue gas distribution box (8) is communicated with the furnace body (1) through a plurality of flue gas nozzles (9), and the outer side of the circulating flue gas distribution box (8) is provided with a flue gas box inlet (10) communicated with the inside.

2. The low melting salt containing liquid waste high temperature flue gas cooling incinerator according to claim 1, characterized in that: The bottom of the furnace body (1) is in a conical hopper structure and is provided with a dust falling port penetrating from top to bottom.

3. The low melting salt containing liquid waste high temperature flue gas cooling incinerator according to claim 1, characterized in that: The circulating flue gas distribution box (8) is located at the top of the cooling chamber (4).

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