Precious metal recovery roasting furnace system

Abstract

The utility model relates to a precious metal recovery roasting furnace system which comprises a first combustion furnace and a second combustion furnace, exhaust pipelines of the first combustion furnace and the second combustion furnace are respectively connected with a secondary combustion chamber, the top of the side wall of the secondary combustion chamber is connected with a main heat exchanger through an exhaust pipeline, and an exhaust pipeline of the main heat exchanger is connected with a quench tower. An exhaust pipeline at the bottom of the quench tower is connected with an acid collecting storage tank, an exhaust pipeline at the top of the acid collecting storage tank is connected with a spray tower, an exhaust pipeline at the top of the spray tower is connected with an alkaline washing tower, the first combustion furnace and the second combustion furnace are both provided with combustion furnace combustors, and the secondary combustion chamber is provided with a secondary combustor. The combustion furnace combustor and the secondary combustor are both connected with a natural gas pipeline, the natural gas pipeline is connected with an oxygen pipeline, and the roasting furnace system is provided with a roasting furnace air feeder and a secondary combustion air feeder. According to the utility model, the flue gas can be subjected to secondary roasting, harmful components in the flue gas can be reduced, and dioxin in the flue gas can be greatly reduced, so that green and environment-friendly effects are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a roasting furnace system, concretely relates to a precious metal recovery roasting furnace system. BACKGROUND

[0002] Part of the waste resin products contains precious metals, to recover the precious metals, the waste resin products need to be high-temperature roasted. The flue gas generated by high-temperature roasting of waste resin contains a large amount of harmful substances, which need to be treated before being discharged.

[0003] The initial roasting is often not sufficient, thereby producing harmful components. Furthermore, part of the gas components will form dioxins in the high-temperature conveying process. However, the prior art does not improve the above two harmful component sources, resulting in large pollution of the existing roasting furnace system. SUMMARY

[0004] The utility model aims at providing a precious metal recovery roasting furnace system, which can perform secondary roasting on the flue gas, reduce harmful components therein, and greatly reduce dioxins in the flue gas, thereby realizing green environmental protection.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A precious metal recovery roasting furnace system, comprising a first combustion furnace and a second combustion furnace, an exhaust pipe of each of the first combustion furnace and the second combustion furnace is connected with a secondary combustion chamber, a side wall top of the secondary combustion chamber is connected with a main heat exchanger through an exhaust pipe, an exhaust pipe of the main heat exchanger is connected with a quenching tower, a bottom exhaust pipe of the quenching tower is connected with an acid collecting tank, a top exhaust pipe of the acid collecting tank is connected with a spray tower, a top exhaust pipe of the spray tower is connected with an alkali washing tower, the first combustion furnace and the second combustion furnace are each provided with a combustion furnace burner, the secondary combustion chamber is provided with a secondary burner, the combustion furnace burner and the secondary burner are both connected with a natural gas pipe, the natural gas pipe is connected with an oxygen pipe, the roasting furnace system is provided with a roasting furnace air blower and a secondary combustion air blower, the roasting furnace air blower is connected with the first combustion furnace and the second combustion furnace through a roasting furnace air supply pipe, the secondary combustion air blower is connected with the secondary combustion chamber through a secondary combustion air supply pipe, the roasting furnace system is provided with a heat exchanger water tank, the heat exchanger water tank is connected with the main heat exchanger through a heat exchange inlet pipe, the roasting furnace system is provided with a graphite heat exchanger, a bottom liquid outlet of the acid collecting tank is connected with a bottom liquid inlet of the graphite heat exchanger through an acid liquid circulation pipe, the acid liquid circulation pipe is provided with a circulating pump, a top liquid outlet of the graphite heat exchanger is connected with a top liquid inlet of the quenching tower through a pipe, and the graphite heat exchanger is connected with a cooling circulation inlet pipe and a cooling circulation outlet pipe.

[0007] Specifically, the first combustion furnace and the second combustion furnace are each provided with three combustion furnace burners.

[0008] Specifically, the roaster air supply pipeline is provided with a roaster air supply regulating valve, and the secondary combustion air supply pipeline is provided with a secondary combustion air supply regulating valve.

[0009] Specifically, the main heat exchanger is connected with a steam discharge pipe, and the steam discharge pipe is provided with a steam discharge amount regulating valve.

[0010] Specifically, the bottom liquid outlet of the graphite heat exchanger is connected with an acid liquid discharge pipeline, and the bottom liquid outlet of the acid collecting tank is connected with an acid liquid discharge pipeline.

[0011] Specifically, the top of the acid collecting tank is connected with a first industrial water inlet pipe, and the first industrial water inlet pipe is provided with an industrial water inlet regulating valve.

[0012] Specifically, the roaster system is provided with an emergency water tank, the top water inlet of the emergency water tank is connected with a second industrial water inlet pipe, and the bottom water outlet of the emergency water tank is connected with the top water inlet of the graphite heat exchanger through an emergency water pipe.

[0013] Specifically, the industrial water branch pipe outlet of the second industrial water inlet pipe is arranged at the side liquid inlet of the spray tower.

[0014] Specifically, the side of the alkali washing tower is provided with an alkali liquid injection pipe.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] The precious metal recovery roaster system of the present application first sends the flue gas generated by roasting to the secondary combustion chamber, thereby performing secondary roasting on the flue gas, so that part of the harmful substances are completely incinerated and decomposed. Then, the flue gas is introduced into the main heat exchanger, water is introduced into the main heat exchanger to obtain steam, thereby recovering the waste heat of the flue gas. The flue gas subsequently flows through the quenching tower, thereby rapidly cooling down to avoid the generation of dioxin substances. Then, the flue gas sequentially passes through the spray tower and the alkali washing tower, and is discharged after the harmful components are removed therefrom. The treatment process greatly reduces the harmful components of the flue gas, which is conducive to realizing green environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 is a schematic view of a precious metal recovery roaster system;

[0019] Figure 2 is a partial view of Figure 1

[0020] ​Figure 3 is a partial view of the first embodiment of the present application; Figure 1 is a partial view of the first embodiment of the present application;

[0021] Figure 4 is a screen operation interface diagram of a precious metal recovery roaster system.

[0022] in the figure:

[0023] 11, first combustion furnace; 12, second combustion furnace; 13, combustion furnace burner; 14, natural gas pipeline; 15, oxygen pipeline; 16, roaster air blower; 161, roaster air blower regulating valve; 17, secondary combustion air blower; 171, secondary combustion air blower regulating valve;

[0024] 2, secondary combustion chamber; 21, secondary combustion burner;

[0025] 3, main heat exchanger; 31, heat exchanger water storage tank; 311, heat exchanger water inlet pump; 312, heat exchanger water inlet regulating valve; 32, steam exhaust pipe; 321, steam exhaust regulating valve;

[0026] 4, quenching tower; 41, acid collection storage tank; 411, acid liquid discharge pipeline; 42, circulating pump; 43, first industrial water inlet pipe; 431, industrial water inlet regulating valve;

[0027] 5, spray tower;

[0028] 6, caustic washing tower; 61, caustic liquid injection pipe;

[0029] 7, graphite heat exchanger; 71, acid liquid discharge pipeline;

[0030] 8, emergency water tank; 81, second industrial water inlet pipe; 82, industrial water branch pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0032] seen Figures 1 to 3 A precious metal recovery roaster system, comprising a first combustion furnace 11 and a second combustion furnace 12, and a secondary combustion chamber 2 connected to the exhaust pipe of each of the first combustion furnace 11 and the second combustion furnace 12. The top of the side wall of the secondary combustion chamber 2 is connected to a main heat exchanger 3 through an exhaust pipe, and the exhaust pipe of the main heat exchanger 3 is connected to a quenching tower 4. The bottom exhaust pipe of the quenching tower 4 is connected to an acid collection storage tank 41, and the top exhaust pipe of the acid collection storage tank 41 is connected to a spray tower 5. The top exhaust pipe of the spray tower 5 is connected to a caustic washing tower 6.

[0033] The first combustion furnace 11 and the second combustion furnace 12 are each provided with a combustion furnace burner 13. The secondary combustion chamber 2 is provided with a secondary combustion burner 21, and the combustion furnace burner 13 and the secondary combustion burner 21 are connected with a natural gas pipeline 14, and the natural gas pipeline 14 is connected with an oxygen pipeline 15.

[0034] The calcination furnace system is provided with a calcination furnace air blower 16 and a secondary combustion air blower 17, and the calcination furnace air blower 16 is connected with the first combustion furnace 11 and the second combustion furnace 12 through a calcination furnace air supply pipeline. The secondary combustion air blower 17 is connected with the secondary combustion chamber 2 through a secondary combustion air supply pipeline.

[0035] The calcination furnace system is provided with a heat exchanger water storage tank 31, and the heat exchanger water storage tank 31 is connected with the main heat exchanger 3 through a heat exchange water inlet pipe, and the heat exchange water inlet pipe is provided with a heat exchange water inlet pump 311 and a heat exchange water inlet regulating valve 312. The calcination furnace system is provided with a graphite heat exchanger 7, and the bottom liquid outlet of the acid storage tank 41 is connected with the bottom liquid inlet of the graphite heat exchanger 7 through an acid liquid circulation pipeline, and the acid liquid circulation pipeline is provided with a circulation pump 42. The top liquid outlet of the graphite heat exchanger 7 is connected with the top liquid inlet of the quenching tower 4 through a pipeline. The side wall of the graphite heat exchanger 7 is connected with a cooling circulation water inlet pipe and a cooling circulation water outlet pipe.

[0036] Specifically, the first combustion furnace 11 and the second combustion furnace 12 are each provided with three combustion furnace burners 13.

[0037] Specifically, the calcination furnace air supply pipeline connected with the calcination furnace air blower 16 is provided with a calcination furnace air supply regulating valve 161. The secondary combustion air supply pipeline is provided with a secondary combustion air supply regulating valve 171.

[0038] Specifically, the main heat exchanger 3 is connected with a steam discharge pipe 32, and the steam discharge pipe 32 is provided with a steam discharge amount regulating valve 321.

[0039] Specifically, the bottom liquid outlet of the graphite heat exchanger 7 is connected with an acid liquid discharge pipeline 71, and the bottom liquid outlet of the acid storage tank 41 is connected with an acid liquid discharge pipeline 411.

[0040] Specifically, the top of the acid storage tank 41 is connected with a first industrial water inlet pipe 43, and the first industrial water inlet pipe 43 is provided with an industrial water inlet regulating valve 431.

[0041] Specifically, the calcination furnace system is provided with an emergency water tank 8, the top water inlet of the emergency water tank 8 is connected with a second industrial water inlet pipe 81, and the bottom water outlet of the emergency water tank 8 is connected with the top water inlet of the graphite heat exchanger 7 through an emergency water pipe.

[0042] Specifically, the industrial water branch pipe 82 outlet of the second industrial water inlet pipe 81 is arranged at the side liquid inlet of the spray tower 5.

[0043] Specifically, the side of the alkali washing tower 6 is connected with an alkali liquid injection pipe 61.

[0044] The working principle of the utility model is as follows:

[0045] In order to recycle precious metals in waste resin, the waste resin is put into the first combustion furnace 11 and the second combustion furnace 12 for roasting. The first combustion furnace 11 and the second combustion furnace 12 are each provided with a combustion furnace burner 13, and the two combustion chambers 2 are provided with secondary burners 21. The combustion furnace burners 13 and the secondary burners 21 are connected with a natural gas pipeline 14 (mixed with oxygen).

[0046] In order to treat the flue gas generated by the first combustion furnace 11 and the second combustion furnace 12, the flue gas is introduced into the two combustion chambers 2 for secondary roasting, so that part of the harmful substances are completely incinerated and decomposed. The flue gas after the secondary roasting of the two combustion chambers 2 is introduced into the main heat exchanger 3, and then introduced into the top gas inlet of the quench tower 4. The solution is sprayed into the side liquid inlet of the quench tower 4, and the solution forms a water mist at the top of the inner cavity of the quench tower 4. The high-temperature flue gas contacts the water mist, instantaneously gasifies, rapidly cools down, and avoids the generation of dioxin substances. The flue gas and the water mist are discharged through the bottom gas outlet of the quench tower 4, and the liquid is stored in the acid collection tank 41. The flue gas flows through the inner cavity of the acid collection tank 41 and enters the bottom gas inlet of the spray tower 5.

[0047] The outlet of the industrial water branch pipe 82 of the second industrial water inlet pipe 81 is arranged at the side liquid inlet of the spray tower 5. The industrial water is sprayed at the top of the inner cavity of the spray tower 5, so that the flue gas is further cooled.

[0048] The emergency water tank 8 stores sufficient industrial water. When the amount of water mist in the quench tower 4 is relatively insufficient, the industrial water stored in the emergency water tank 8 can be used to spray water mist in the quench tower 4 in an emergency.

[0049] The lye is injected into the alkali washing tower 6 through the lye injection pipe 61. After the flue gas flows out from the top gas outlet of the spray tower 5, it enters the inside of the alkali washing tower 6 through the bottom of the alkali washing tower 6, so as to react with the lye and remove part of the harmful gas, and finally is discharged through the top gas outlet of the alkali washing tower 6.

[0050] The roasting furnace system is provided with a heat exchanger water storage tank 31. The heat exchanger water storage tank 31 is connected with the main heat exchanger 3 through a heat exchange water inlet pipe, and the main heat exchanger 3 is connected with a steam discharge pipe 32. The water in the heat exchanger water storage tank 31 flows through the main heat exchanger 3, exchanges heat with the flue gas, and becomes steam, which is introduced to the place where steam is needed in the factory by the steam discharge pipe 32.

[0051] The noble metal recovery roasting furnace system sends the flue gas generated by roasting to the second combustion chamber 2 first, thereby performing secondary roasting on the flue gas, and makes part of harmful substances completely burnt and decomposed. Then, the flue gas is introduced into the main heat exchanger 3, and water is passed into the main heat exchanger 3 to obtain steam, thereby recovering the waste heat of the flue gas. The flue gas subsequently flows through the quench tower 4, thereby rapidly cooling, and avoiding the generation of dioxin substances. Then, the flue gas sequentially passes through the spray tower 5 and the alkali washing tower 6, and is discharged after the harmful components are removed. The treatment process greatly reduces the harmful components of the flue gas, and is beneficial to realizing green environmental protection.

[0052] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above with a preferred embodiment, it is not intended to limit the utility model. Any person skilled in the art can make slight changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes without departing from the technical solution of the utility model. Any modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belongs to the scope of the technical solution of the utility model.

Claims

1. A precious metal recovery roaster system, characterized by: The system comprises a first combustion furnace and a second combustion furnace, each of which is connected with a secondary combustion chamber, the top of the side wall of the secondary combustion chamber is connected with a main heat exchanger through an exhaust pipe, the main heat exchanger is connected with a quench tower through an exhaust pipe, the bottom of the quench tower is connected with an acid collecting tank through an exhaust pipe, the top of the acid collecting tank is connected with a spray tower through an exhaust pipe, the top of the spray tower is connected with a caustic washing tower through an exhaust pipe, the first combustion furnace and the second combustion furnace are each provided with a combustion furnace burner, the secondary combustion chamber is provided with a secondary burner, the combustion furnace burner and the secondary burner are connected with a natural gas pipe, the natural gas pipe is connected with an oxygen pipe, the roasting furnace system is provided with a roasting furnace blower and a secondary combustion blower, the roasting furnace blower is connected with the first combustion furnace and the second combustion furnace through a roasting furnace air supply pipe, the secondary combustion blower is connected with the secondary combustion chamber through a secondary combustion air supply pipe, the roasting furnace system is provided with a heat exchanger water tank, the heat exchanger water tank is connected with the main heat exchanger through a heat exchange inlet pipe, the roasting furnace system is provided with a graphite heat exchanger, the bottom liquid outlet of the acid collecting tank is connected with the bottom liquid inlet of the graphite heat exchanger through an acid liquid circulation pipe, the acid liquid circulation pipe is provided with a circulating pump, the top liquid outlet of the graphite heat exchanger is connected with the top liquid inlet of the quench tower through a pipe, and the graphite heat exchanger is connected with a cooling circulation inlet pipe and a cooling circulation outlet pipe.

2. The precious metal recovery furnace system of claim 1, wherein: The first combustion furnace and the second combustion furnace are each provided with three combustion furnace burners.

3. The precious metal recovery furnace system of claim 1, wherein: The roasting furnace air supply pipe is provided with a roasting furnace air supply adjusting valve, and the secondary combustion air supply pipe is provided with a secondary combustion air supply adjusting valve.

4. The precious metal recovery furnace system of claim 1, wherein: The main heat exchanger is connected with a steam exhaust pipe, and the steam exhaust pipe is provided with a steam exhaust adjusting valve.

5. The precious metal recovery furnace system of claim 1, wherein: The bottom liquid outlet of the graphite heat exchanger is connected with an acid liquid discharge pipe, and the bottom liquid outlet of the acid collecting tank is connected with an acid liquid discharge pipe.

6. The precious metal recovery furnace system of claim 1, wherein: The top of the acid collecting tank is connected with a first industrial water inlet pipe, and the first industrial water inlet pipe is provided with an industrial water inlet adjusting valve.

7. The precious metal recovery furnace system of claim 1, wherein: The roasting furnace system is provided with an emergency water tank, the top water inlet of the emergency water tank is connected with a second industrial water inlet pipe, and the bottom water outlet of the emergency water tank is connected with the top water inlet of the graphite heat exchanger through an emergency water pipe.

8. The precious metal recovery furnace system of claim 7, wherein: The industrial water branch pipe outlet of the second industrial water inlet pipe is arranged at the side liquid inlet of the spray tower.

9. The precious metal recovery furnace system of claim 1, wherein: The side of the caustic washing tower is provided with an alkali liquid injection pipe.

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