Roasting furnace for acid regeneration

Abstract

The utility model relates to a roasting furnace for acid regeneration, which comprises a furnace body and main burners arranged on the furnace body, the number N of the main burners is an even number greater than 4, the N main burners are annularly distributed relative to the axis of the furnace body and are uniformly arranged at intervals along the circumferential direction of the furnace body, and each main burner is tangentially communicated with the furnace body; and / or, an even number of gun inserting holes are formed in the top of the furnace body, are annularly distributed relative to the axis of the furnace body and are uniformly arranged at intervals in the circumferential direction of the furnace body. According to the utility model, the number of the main burners is an even number greater than 4, and the main burners are uniformly and annularly arranged at intervals along the circumferential direction of the furnace body and are tangentially communicated with the furnace body, so that the uniformity of a flow field and a temperature field in the furnace can be effectively improved, and the gas flow regulation of the main burners can be finer, thereby reducing the energy consumption level of the roasting furnace. The even number of gun inserting holes are uniformly and annularly formed in the circumferential direction of the furnace body at intervals, so that the acid guns can be uniformly and annularly arranged relative to the axis of the furnace body, and the uniformity of a flow field and a temperature field in the furnace can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of roasting furnace, specifically relates to a roasting furnace for acid regeneration. BACKGROUND

[0002] The spray roasting method waste acid regeneration technology can realize full resource recovery of pickling waste liquid, on the one hand, reduces the influence of waste acid treatment on the environment, on the other hand, the recovered regenerated acid and metal oxide can be further reused, creates value for enterprises, and has gradually become the mainstream technology in the field of pickling waste liquid treatment. The roasting furnace is the key core equipment of the acid regeneration system, the pickling waste liquid is sprayed into the roasting furnace, and chemical reaction occurs at high temperature to generate regenerated acid and metal oxide. At present, the uniformity and adjustability of the flow field and temperature field in the roasting furnace are insufficient, which leads to high energy consumption level of the roasting furnace, although there is the demand of energy saving and consumption reduction, but the energy saving and consumption reduction means is limited, and the energy saving effect needs to be improved. CONTENT OF THE UTILITY MODEL

[0003] The utility model relates to a kind of roasting furnaces for acid regeneration, at least can solve the partial defects of prior art.

[0004] The utility model relates to a kind of roasting furnaces for acid regeneration, including furnace body and the main burner of being set on the furnace body, the quantity N of the main burner is even number greater than 4, N The main burner is annularly distributed relative to furnace body axis and is uniformly spaced along the circumferential direction of the furnace body, each main burner is tangentially communicated with the furnace body;And / or, furnace body top is equipped with even number of gun insertion hole, even number of gun insertion hole is annularly distributed relative to furnace body axis and is uniformly spaced along the circumferential direction of the furnace body.

[0005] As one of the implementation manners, N The main burner is configured as N / 2 group burner pair, each burner pair includes two main burners symmetrically arranged relative to furnace body axis, each burner pair is configured with a medium gas pipeline, and the medium gas pipelines of each burner pair are independent of each other.

[0006] As one of the implementation manners, a plurality of temperature measuring units are arranged on the furnace body, and each temperature measuring unit is sequentially and spacedly arranged from bottom to top.

[0007] As one of the implementation manners, the furnace body includes furnace top conical section, furnace middle cylindrical section and furnace bottom reverse conical section, and each temperature measuring unit is arranged on the furnace middle cylindrical section.

[0008] As one of the implementation manners, the first and last two groups of temperature measuring units are arranged at the bottom and top of the furnace middle cylindrical section respectively.

[0009] As one of the implementation manners, the furnace body includes furnace top conical section, furnace middle cylindrical section and furnace bottom reverse conical section, and each main burner is arranged on the furnace middle cylindrical section.

[0010] As one of the embodiments, the furnace body further comprises a furnace bottom cylindrical section connected to the bottom of the furnace bottom inverted conical section, and a bottom burner is arranged on the furnace bottom cylindrical section.

[0011] As one of the embodiments, the bottom burners are multiple and uniformly and evenly arranged along the circumference of the furnace bottom cylindrical section.

[0012] As one of the embodiments, the bottom burners are tangentially communicated with the bottom cylindrical section.

[0013] The utility model has at least the following beneficial effects:

[0014] In the utility model, the number of main burners is set to an even number greater than 4, each main burner is uniformly and evenly arranged along the circumference of the furnace body and tangentially communicated with the furnace body, which can effectively improve the uniformity of the flow field and temperature field in the furnace, the gas flow of the main burner can be more finely adjusted, thereby reducing the energy consumption level of the roasting furnace. The even number of gun insertion holes are uniformly and evenly arranged along the circumference of the furnace body, which can uniformly arrange multiple acid guns relative to the axis of the furnace body, thereby improving the uniformity of the flow field and temperature field in the furnace. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0016] Figure 1 The structure diagram of the roasting furnace for acid regeneration provided by the embodiment of the utility model is shown in the figure.

[0017] Figure 2 The top view of the roasting furnace for acid regeneration provided by the embodiment of the utility model is shown in the figure. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiment of the utility model will be clearly and completely described below, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0019] As Figure 1 and Figure 2The utility model embodiment provides a kind of calcination furnace for acid regeneration, including furnace body and the main burner 3 being set on the furnace body, the quantity N of the main burner 3 is even greater than 4, N the main burner 3 is relative to furnace body axis annular distribution and is arranged along the uniform interval of the circumference of the furnace body, each main burner 3 is tangentially communicated with the furnace body;And / or, furnace body top is equipped with even number of lance insertion hole 13, the even number of lance insertion hole 13 is relative to furnace body axis annular distribution and is arranged along the uniform interval of the circumference of the furnace body.

[0020] In one embodiment, as Figure 1 The furnace body includes furnace top conical section 1, furnace middle cylindrical section 2 and furnace bottom inverse conical section 4, each main burner 3 is arranged on the furnace middle cylindrical section 2;Further, each main burner 3 is arranged at the bottom of the furnace middle cylindrical section 2.

[0021] Further, as Figure 1 The furnace body further includes furnace bottom cylindrical section 7, which is connected to the bottom of the furnace bottom inverse conical section 4, wherein, preferably, the furnace bottom cylindrical section 7 and the furnace bottom inverse conical section 4 are connected by a furnace middle bottom 5, and the bottom of the furnace bottom cylindrical section 7 can be further provided with a furnace lower bottom 8.

[0022] Optionally, the furnace middle bottom 5 and the upper surface of the furnace bottom inverse conical section 4 are provided with an upper refractory layer 6, and the upper surface of the furnace lower bottom 8 is provided with a lower refractory layer 9.

[0023] The above-mentioned calcination furnace is also provided with a stirring rake 11, the rake body of the stirring rake 11 is preferably arranged in the furnace bottom inverse conical section 4, and the shaft body of the stirring rake 11 can penetrate the furnace bottom cylindrical section 7 from the lower part of the furnace body and extend into the furnace bottom inverse conical section 4. The shaft body of the stirring rake 11 is preferably coaxially arranged with the furnace body, that is, coaxially arranged with the furnace bottom cylindrical section 7 and the furnace bottom inverse conical section 4.

[0024] Further, as Figure 1 The bottom burner 10 is provided on the furnace bottom cylindrical section 7, and the cooperation of the main burner 3 and the bottom burner 10 can ensure the treatment effect of the acid pickling waste liquid.

[0025] Preferably, the bottom burner 10 is multiple and uniformly spaced along the circumference of the furnace bottom cylindrical section 7, which not only ensures the treatment effect in the furnace bottom cylindrical section 7, but also improves the uniformity of the flow field and temperature field in the furnace.

[0026] Optionally, the bottom burner 10 is tangentially communicated with the bottom cylindrical section, which can improve the combustion effect of the gas in the furnace bottom cylindrical section 7 and the treatment effect in the furnace bottom cylindrical section 7 to a certain extent.

[0027] The lance insertion hole 13 is used for inserting an acid lance, wherein the lance insertion hole 13 is preferably provided on the furnace top conical section 1, asFigure 2 The even number of lance holes 13 are evenly arranged around the axis of the furnace top conical section 1. Based on this structure, the plurality of acid lances can be evenly arranged around the axis of the furnace body, i.e. evenly spaced along the circumference of the furnace top conical section 1, which can improve the uniformity of the flow field and temperature field in the furnace.

[0028] Further, the number M of the lance holes 13 is an even number greater than 2; each lance hole 13 is configured as M / 2 groups of holes, each group of holes including two lance holes 13 symmetrically arranged relative to the axis of the furnace body, and the acid lances in each group of holes are in the same working state, i.e. both working or both standby, which can ensure the uniformity of the flow field and temperature field in the furnace. Taking the case of four lance holes 13, in this structure, two acid lances in one group of holes are working acid lances, and the other two acid lances in the other group of holes are standby acid lances. For the above structure, one waste acid pipeline can be designed for the two acid lances in each group of holes, and the waste acid pipelines corresponding to each group of holes are independent of each other.

[0029] Preferably, the distance between the lance hole 13 and the axis of the furnace body is controlled within the range of 1-4m, which can further ensure the uniformity of the flow field and temperature field in the furnace.

[0030] In this embodiment, the number of main burners 3 is set to an even number greater than 4, and each main burner 3 is evenly spaced around the circumference of the furnace body and communicates tangentially with the furnace body, which can effectively improve the uniformity of the flow field and temperature field in the furnace, and the gas flow of the main burner 3 can be adjusted more finely, thereby reducing the energy consumption level of the roasting furnace, and the effect is more obvious for large-scale roasting furnaces.

[0031] The axis of the main burner 3 can be parallel to the horizontal plane, or inclined upward by 0-15° relative to the horizontal plane, which makes the gas have greater upward potential energy.

[0032] Further preferably, the N main burners 3 are configured as N / 2 pairs of burners, each pair of burners including two main burners 3 symmetrically arranged relative to the axis of the furnace body, each pair of burners is configured with one medium gas pipeline, and the medium gas pipelines of each pair of burners are independent of each other. In this structure, each pair of burners is independently controlled, which can control the number of main burners 3 in use, thereby flexibly adjusting the flow field and temperature field in the furnace, improving the uniformity of the flow field and temperature field in the furnace and the roasting effect; since the two main burners 3 in each pair of burners are symmetrically arranged relative to the axis of the furnace body, the asymmetric distribution of the working main burners 3 can be avoided, which affects the uniformity of the flow field and temperature field in the furnace.

[0033] In one embodiment, as shown in Figure 1The furnace body is provided with a plurality of groups of temperature measuring units 12, and each temperature measuring unit 12 is spaced and distributed in sequence from bottom to top. The temperature measuring unit 12 can monitor the temperature in the furnace in real time. The temperature measuring unit 12 can be a temperature measuring hole structure provided on the furnace body.

[0034] By monitoring the temperature in the furnace in real time, on the one hand, the service life of the roasting furnace is affected by the high temperature in the furnace, and on the other hand, the gas flow of the burner can be optimized in real time, and the energy medium consumption is reduced. Each temperature measuring unit 12 is electrically connected with the unit control console, and is used for feeding back temperature measuring data to the unit control console; the unit control console is used for controlling the work of each main burner 3 according to the obtained temperature measuring data, including but not limited to adjusting the gas flow of each main burner 3.

[0035] For the structure of the furnace body including the furnace top conical section 1, the furnace middle cylindrical section 2 and the furnace bottom inverted conical section 4, preferably, each temperature measuring unit 12 is arranged on the furnace middle cylindrical section 2.

[0036] The distance between adjacent temperature measuring units 12 can be the same or different. The plurality of groups of temperature measuring units 12 are preferably distributed along the entire height of the furnace middle cylindrical section 2, and the first and last groups of temperature measuring units 12 are arranged at the bottom and top of the furnace middle cylindrical section 2, respectively, and are also arranged in the middle of the furnace middle cylindrical section 2. The distribution density of the temperature measuring units 12 in the lower section of the furnace middle cylindrical section 2 is greater than that in the upper section of the furnace middle cylindrical section 2, so that there are enough temperature measuring units 12 in the main reaction zone for temperature measurement.

[0037] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A calcining furnace for acid regeneration comprising a furnace body and a main burner provided on the furnace body, characterized by: The number N of the main burners is an even number greater than 4, the N main burners are annularly distributed relative to the furnace body axis and uniformly spaced along the circumference of the furnace body, and each main burner is tangentially communicated with the furnace body; and / or, the furnace body top is provided with an even number of lance insertion holes, the even number of lance insertion holes are annularly distributed relative to the furnace body axis and uniformly spaced along the circumference of the furnace body.

2. The calcining furnace for acid regeneration according to claim 1, characterized by: The N main burners are configured as N / 2 groups of burner pairs, each group of burner pairs includes two main burners symmetrically arranged relative to the furnace body axis, each group of burner pairs is configured with a medium gas pipe, and the medium gas pipes of each group of burner pairs are independent of each other.

3. The calcining furnace for acid regeneration according to claim 1, characterized by: The furnace body is provided with a plurality of groups of temperature measurement units, and each temperature measurement unit is sequentially and spacedly distributed from bottom to top.

4. The calcining furnace for acid regeneration according to claim 3, characterized by: The furnace body includes a furnace top conical section, a furnace middle cylindrical section and a furnace bottom inverted conical section, and each temperature measurement unit is arranged on the furnace middle cylindrical section.

5. The calcining furnace for acid regeneration according to claim 4, characterized in that: The first and last groups of temperature measurement units are arranged at the bottom and top of the furnace middle cylindrical section, respectively.

6. The calcining furnace for acid regeneration according to claim 1, characterized by: The number M of the lance insertion holes is greater than 2; each lance insertion hole is configured as M / 2 groups of hole groups, each group of hole groups includes two lance insertion holes symmetrically arranged relative to the furnace body axis, and the working states of the two acid lances in each group of hole groups are the same.

7. The calcining furnace for acid regeneration according to claim 1, characterized by: The furnace body includes a furnace top conical section, a furnace middle cylindrical section and a furnace bottom inverted conical section, and each main burner is arranged on the furnace middle cylindrical section.

8. The calcining furnace for acid regeneration according to claim 7, characterized by: The furnace body further includes a furnace bottom cylindrical section connected to the bottom of the furnace bottom inverted conical section, and a bottom burner is arranged on the furnace bottom cylindrical section.

9. The calcining furnace for acid regeneration according to claim 8, characterized by: The bottom burner has a plurality of and is uniformly spaced along the circumference of the furnace bottom cylindrical section.

10. The calcining furnace for acid regeneration according to claim 7, characterized by: The bottom burner is tangentially communicated with the bottom cylindrical section.

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