Carbon black flue gas atomization cooling device

Abstract

A carbon black flue gas atomization cooling device relates to the technical field of carbon black flue gas cooling, and adopts the technical scheme that the carbon black flue gas atomization cooling device comprises a reaction furnace body, an outlet of the reaction furnace body is connected with a waste heat assembly, the waste heat assembly is connected with a jacket through a mounting pipe, and the jacket is arranged on the outer wall of the mounting pipe. The technical scheme has the beneficial effects that the heat-conducting oil jacket is adopted for heat exchange to heat and deoxygenate water supplied to the waste heat boiler, so that the carbon black flue gas waste heat is further recovered, the flue gas temperature at the downstream venturi is reduced, the use amount of quenching water can be reduced, water resources are saved, the water content in carbon black tail gas is reduced, the precipitation of condensed water is reduced, and the energy consumption is reduced. Further, the lower liquid water treatment cost is reduced, and corrosion to equipment is reduced. Meanwhile, recovered waste heat heats boiler feed water for deoxygenization, energy is saved, benefits are created, and the corrosion rate of the boiler is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of black smoke cooling, in particular to a carbon black smoke atomization cooling device. Background Art

[0002] Carbon black flue gas: Carbon black production generally involves mixing tar and other hydrocarbon substances in a certain proportion into raw oil in a reactor, which is generated through incomplete combustion and high-temperature cracking. During the reaction, a flue gas mixture containing carbon black dust, CO, H2, H2S, etc. may be produced, which is called carbon black flue gas. The carbon black flue gas is cooled by multi-stage quenching water and heat exchanged by step-by-step heat exchangers, and then enters the bag filter to be filtered and screened into carbon black dust and carbon black tail gas. The carbon black dust is collected, granulated, dried, and packaged to form a finished carbon black product. The carbon black tail gas is sent to the energy demand department as a by-product for combustion as fuel.

[0003] In the process of carbon black production, single-fluid atomizing spray guns and dual-fluid atomizing spray guns are mainly used. Since carbon black tail gas is flammable and explosive, dual-fluid atomizing spray guns must use inert gases such as nitrogen, which consumes a lot of energy and has poor economic benefits. Therefore, the cooling of carbon black tail gas after the reaction is mainly based on single-fluid atomizing technology.

[0004] The single-fluid spray gun relies only on the pressure of the quenching water itself for atomization. Since the single-fluid spray gun has only one central hole, the droplets are large and the atomization effect is poor. The flue gas temperature needs to be controlled within the process requirements. The amount of quenching water used is large, and the water quality requirements are high. Impurities in the water can easily clog the nozzle. The atomization effect is greatly affected by the size of the central aperture and the change in the quenching water pressure, and it is difficult to control. The spray gun jet direction is perpendicular to the carbon black flue gas flow direction. Some droplets are sprayed on the opposite pipe wall. At the same time, affected by the flue gas flow, some droplets fall on the lower pipe wall, resulting in a waste of quenching water and an increase in the water content of the carbon black flue gas. This results in a higher water content in the by-product carbon black tail gas after separation, which reduces the thermal enthalpy value of the carbon black tail gas during combustion and increases the difficulty of tail gas liquid treatment during transportation. Summary of the invention

[0005] The utility model aims to overcome the problem that the carbon black temperature is too high during the current carbon black production, resulting in a waste of water resources and a high water content in the by-product carbon black tail gas after separation, and proposes a carbon black smoke atomization cooling device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A carbon black smoke atomization cooling device comprises a mounting tube, the outer wall of the mounting tube is provided with a jacket, the inlet of the mounting tube is connected to a waste heat component, the inlet of the waste heat component can be connected to the outlet of a reaction furnace body, the outer wall of the mounting tube is provided with a jacket, a heat conduction component is provided in the jacket, the outlet of the mounting tube is connected to a venturi tube, and a spray gun is provided in the venturi tube.

[0008] A heat exchange jacket is added to the straight pipe section behind the waste heat boiler. The heat exchange medium in the jacket further recovers the waste heat of the carbon black flue gas, reduces the temperature of the flue gas flowing through the quenching water, thereby reducing the amount of quenching water used and reducing the water content in the carbon black tail gas.

[0009] Preferably, the heat transfer component includes a heat transfer oil tank, the outlet of the heat transfer oil tank is connected to the jacket, the outlet of the jacket is connected to a deaerator component, and the deaerator component is connected to the inlet of the heat transfer oil tank through a pipeline.

[0010] The heat transfer oil is pumped into the jacket through the oil circulation pump to exchange heat with the carbon black flue gas, and then flows into the water tank pipe of the deaerator device to heat the residual boiler water for deoxygenation. After the heat exchange, the hot oil returns to the heat transfer oil tank for reciprocating circulation.

[0011] Preferably, the lance is located on a constricted conduit on a venturi.

[0012] The negative pressure adsorption effect generated by the Venturi effect can further improve the atomization cooling effect.

[0013] Preferably, the waste heat component includes a preheater, the inlet of the preheater can be connected to the outlet of the reaction furnace body, the first outlet of the preheater is connected to a primary waste heat boiler, the second outlet of the preheater is connected to a hot air pipe, and the outlet of the hot air pipe can be connected to the reaction furnace body.

[0014] The preheater and hot air duct heat the air to be used in advance.

[0015] Preferably, the primary waste heat boiler is connected to the secondary waste heat boiler via a connecting pipe, a raw oil preheater is sleeved on the outer wall of the connecting pipe, and the mounting pipe is connected to the outlet of the secondary waste heat boiler.

[0016] Preferably, the outlet of the venturi tube is connected to a main bag filter.

[0017] Preferably, a second connection port is provided on the reaction furnace body, and the reaction furnace body is connected to the outlet of the raw oil preheater.

[0018] Compared with the prior art, the utility model has the following beneficial effects: after heat exchange with the heat-conducting oil jacket, the feed water of the waste heat boiler is heated and deoxygenated, which further recovers the waste heat of the carbon black flue gas, reduces the flue gas temperature at the downstream venturi, and thus reduces the use of quenching water, saves water resources, and at the same time reduces the water content in the carbon black tail gas, reduces the precipitation of condensed water, and thus reduces the cost of liquid water treatment and reduces corrosion to equipment. At the same time, the recovered waste heat is used to heat the boiler feed water for deoxygenation, saving energy, creating benefits, and reducing the corrosion rate of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0021] Figure 2 It is a schematic diagram of the structure of the venturi tube and the spray gun in a specific implementation manner of the utility model.

[0022] In the figure: 1 preheater, 2 hot air pipe, 3 reaction furnace body, 4 first connection port, 5 second connection port, 6 primary waste heat boiler, 7 raw oil preheater, 8 air inlet, 9 secondary waste heat boiler, 10 jacket, 11 thermal oil tank, 12 deaerator assembly, 13 venturi tube, 14 main bag filter, 15 installation pipe, 16 spray gun. DETAILED DESCRIPTION

[0023] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0024] Reference Figure 1-2A carbon black flue gas atomization and cooling device comprises a mounting pipe 15, the outer wall of the mounting pipe 15 is provided with a jacket 10, the inlet of the mounting pipe 15 is connected with a waste heat component, heat transfer oil is transported in the jacket 10, the heat transfer oil absorbs the heat of the flue gas passing through the waste heat component, and reduces the heat in the flue gas, a heat transfer component is arranged in the jacket 10, the heat transfer component comprises a heat transfer oil tank 11, the outlet of the heat transfer oil tank 11 is connected to the jacket 10, the heat transfer oil tank 11 transports heat transfer oil into the jacket 10, the outlet of the jacket 10 is connected with a deaerator component 12, the heat transfer oil flows into the water tank pipe of the deaerator component, after heat exchange, the hot oil returns to the heat transfer oil tank 11 for reciprocating circulation, and is deoxygenated through the deaerator component 12, so as to protect the boiler and reduce the corrosion rate, and at the same time realize Energy saving and consumption reduction are achieved. The deaerator assembly 12 is connected to the inlet of the heat transfer oil tank 11 through a pipeline. The outlet of the mounting pipe 15 is connected to the venturi tube 13. A spray gun 16 is arranged in the venturi tube 13. There are two spray guns 16, which are symmetrically distributed in the middle of the venturi neck section. One is used and one is reserved for easy adjustment. The spray gun 16 is located on the neck-type pipeline on the venturi tube 13. Due to the Venturi effect, a negative pressure adsorption effect is generated in the neck diffusion section, which can further improve the atomization effect of the quenching water. At the same time, the quenching water injection mode is changed. The nozzle jet and the carbon black flue gas flow direction angle are changed from vertical to coaxial, co-directional, and forward spraying, which reduces the smoke resistance, eliminates the waste of quenching water, and further improves the atomization cooling effect. The outlet of the venturi tube 13 is connected to the main bag filter 14.

[0025] Reference Figure 1-2 The waste heat component includes a preheater 1, the inlet of the preheater 1 can be connected to the outlet of the reaction furnace body 3, the reaction furnace body 3 passes the processed gas through the preheater 1, and the preheater 1 heats the gas supplemented with oxygen and first absorbs the heat in the flue gas. The first outlet of the preheater is connected to a first-level waste heat boiler 6, and the second outlet of the preheater 1 is connected to a hot air pipe 2. After passing through the preheater 1, the hot gas is transported to the hot air pipe 2 and then transported to the reaction furnace body 3. The outlet of the hot air pipe 2 is connected to the reaction furnace body 3. The first-level waste heat boiler 6 is connected to the second-level waste heat boiler 9 through a connecting pipe. The flue gas passes through the first-level waste heat boiler 6 and the second-level waste heat boiler 9 to reduce the heat in the flue gas. The outer wall of the connecting pipe is provided with a raw oil preheater 7, and the installation pipe 15 is connected to the outlet of the second-level waste heat boiler 9. The reaction furnace body 3 is provided with a second connecting port 5, and the reaction furnace body 3 is connected to the outlet of the raw oil preheater 7, and the carbon black raw oil to be used is heated through the raw oil preheater 7.

[0026] During production, the combustion air is heated by the preheater 1 and then enters the reaction furnace body 3 through the hot air pipe 2, the carbon black oil enters the reaction furnace body 3 through the raw oil preheater 7, and the carbon black flue gas after the reaction is cooled step by step through the preheater 1, the first-level waste heat boiler 6, the raw oil preheater 7 and the second-level waste heat boiler 9, and then is transported to the installation pipe 15. Since the outer wall of the installation pipe 15 is provided with a jacket 10, the heat transfer oil in the jacket 10 absorbs the heat of the flue gas in the installation pipe 15, further recovers the waste heat of the flue gas, reduces the temperature of the downstream carbon black flue gas, and then is transported to the Venturi tube 13. The negative pressure adsorption effect generated by the Venturi effect is used to further refine the droplets and reduce the water content of the carbon black flue gas. Since the angle between the jet of the spray gun 16 and the carbon black flue gas is coaxial and co-directional, the atomization cooling effect is further improved.

[0027] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon black smoke atomization and cooling device, comprising a mounting pipe (15), characterized in that: The outer wall of the installation pipe (15) is provided with a jacket (10), the inlet of the installation pipe (15) is connected to a waste heat component, the inlet of the waste heat component can be connected to the outlet of the reaction furnace body (3), the outer wall of the installation pipe (15) is provided with a jacket (10), a heat conduction component is arranged in the jacket (10), the outlet of the installation pipe (15) is connected to a venturi tube (13), and a spray gun (16) is arranged in the venturi tube (13).

2. The carbon black smoke atomization and cooling device according to claim 1, characterized in that: The heat conduction component comprises a heat conduction oil tank (11), the outlet of the heat conduction oil tank (11) is connected to the jacket (10), the outlet of the jacket (10) is connected to a deaerator component (12), and the deaerator component (12) is connected to the inlet of the heat conduction oil tank (11) through a pipeline.

3. The carbon black smoke atomization and cooling device according to claim 2, characterized in that: The spray gun (16) is located on a constricted pipe on the venturi tube (13).

4. The carbon black smoke atomization and cooling device according to claim 1, characterized in that: The waste heat component comprises a preheater (1), the inlet of the preheater (1) can be connected to the outlet of the reaction furnace body (3), the first outlet of the preheater (1) is connected to a primary waste heat boiler (6), the second outlet of the preheater (1) is connected to a hot air pipe (2), and the outlet of the hot air pipe (2) can be connected to the reaction furnace body (3).

5. The carbon black smoke atomization and cooling device according to claim 4, characterized in that: The primary waste heat boiler (6) is connected to the secondary waste heat boiler (9) via a connecting pipe, a raw oil preheater (7) is sleeved on the outer wall of the connecting pipe, and a mounting pipe (15) is connected to the outlet of the secondary waste heat boiler (9).

6. The carbon black smoke atomization and cooling device according to claim 1, characterized in that: The outlet of the venturi tube (13) is connected to a main bag filter (14).

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