Carbon dioxide recovery system

Abstract

The utility model discloses a carbon dioxide recovery system which comprises an absorption tower, a desorption tower, a decarburization liquid circulation assembly and a carbon dioxide separation assembly, the absorption tower is communicated with the desorption tower through a decarburization liquid connecting pipe, and the decarburization liquid circulation assembly is arranged between the absorption tower and the desorption tower and is respectively communicated with the absorption tower and the desorption tower. A carbon dioxide gas pipe communicated with the desorption tower is arranged on the desorption tower, and the carbon dioxide separation assembly is arranged on the carbon dioxide gas pipe. According to the utility model, the carbon dioxide in the biogas can be recovered.

Description

Technical Field

[0001] The utility model belongs to the field of carbon dioxide recovery and treatment, and specifically relates to a carbon dioxide recovery system. Background Art

[0002] The carbon dioxide in the current biogas is generally discharged directly into the atmosphere or discharged together with combustion or purified, which increases the carbon dioxide content in the air. Currently, there is no design that can realize the recovery of carbon dioxide in biogas to meet the existing demand. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a carbon dioxide recovery system to recover carbon dioxide from biogas in view of the above-mentioned deficiencies in the prior art.

[0004] The technical solution adopted by the utility model is: a carbon dioxide recovery system, comprising a carbon dioxide recovery system and a carbon dioxide reaction system which are interconnected;

[0005] The carbon dioxide recovery system comprises an absorption tower, an analysis tower, a decarbonization liquid circulation component and a carbon dioxide separation component. The absorption tower is provided with a biogas inlet pipe and a biogas outlet pipe connected thereto. The absorption tower and the analysis tower are connected via a decarbonization liquid connecting pipe. The decarbonization liquid circulation component is arranged between the absorption tower and the analysis tower and is connected to the absorption tower and the analysis tower respectively. The analysis tower is provided with a carbon dioxide gas pipe connected thereto. The carbon dioxide separation component is arranged on the carbon dioxide gas pipe.

[0006] The carbon dioxide reaction system includes a carbon dioxide reaction component, a backflush component and a carbon dioxide finished product component. The carbon dioxide reaction system is connected to a carbon dioxide recovery system via a carbon dioxide intake and diversion component, the backflush component is connected to a carbon dioxide intake and diversion component, and the carbon dioxide finished product component is connected to a carbon dioxide reaction component.

[0007] In one of the embodiments, a filter assembly is provided on the decarbonization liquid connecting pipe.

[0008] In one of the embodiments, a regulating component is provided between the absorption tower and the decarbonization liquid connecting pipe.

[0009] In one of the embodiments, the decarbonization liquid circulation component includes at least one circulation pump, and the circulation pump is connected to the analysis tower and the absorption tower through a decarbonization liquid circulation inlet pipe and a decarbonization liquid circulation outlet pipe respectively, and a decarbonization liquid circulation pressure gauge is provided on the decarbonization liquid circulation inlet pipe.

[0010] In one of the embodiments, when there are multiple circulation pumps, each circulation pump is respectively connected to the decarbonization liquid circulation inlet pipe and the decarbonization liquid circulation outlet pipe.

[0011] In one of the embodiments, a gas pipe temperature gauge and a gas pipe pressure gauge are respectively provided on the carbon dioxide gas pipe.

[0012] In one embodiment, the carbon dioxide separation component includes a water cooler and a separator, and the water cooler and the separator are both arranged on the carbon dioxide gas pipe. The separator is provided with a decarbonization liquid recovery pipe connected to the analysis tower, and the carbon dioxide gas pipe located between the water cooler and the separator is provided with a separation component temperature gauge.

[0013] In one embodiment, the filter assembly includes a filter, and the filter is provided with a decarbonization liquid filter inlet pipe and a decarbonization liquid filter outlet pipe connected thereto, and the decarbonization liquid filter inlet pipe and the decarbonization liquid filter outlet pipe are respectively connected to a decarbonization liquid connecting pipe, and the decarbonization liquid filter inlet pipe, the decarbonization liquid filter outlet pipe and the decarbonization liquid connecting pipe located between the decarbonization liquid filter inlet pipe and the decarbonization liquid filter outlet pipe are all provided with a decarbonization liquid filter valve.

[0014] In one embodiment, the regulating assembly includes a liquid level meter, a controller and a regulating valve arranged on the decarbonization liquid connecting pipe close to one end of the absorption tower, and the liquid level meter, the controller and the regulating valve are electrically connected in sequence.

[0015] The beneficial effects of the utility model are as follows: through the coordinated use of the absorption tower and the analysis tower, the recovery of carbon dioxide in the biogas can be realized; the use of the decarbonization liquid circulation component and the carbon dioxide separation component can realize the circulation of the decarbonization liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the carbon dioxide recovery system of the utility model;

[0017] Figure 2 This is a schematic diagram of the components of the carbon dioxide recovery system of the present invention.

[0018] In the figure: 101, absorption tower; 102, analytical tower; 103, decarbonization liquid circulation assembly; 104, carbon dioxide separation assembly; 105, biogas inlet pipe; 106, biogas outlet pipe; 107, decarbonization liquid connecting pipe; 108, carbon dioxide gas pipe; 109, filtering assembly; 110, regulating assembly; 1031, circulation pump; 1032, decarbonization liquid circulation inlet pipe; 1033, decarbonization liquid circulation outlet pipe; 1034, decarbonization liquid circulation pressure gauge; 1041. Water cooler; 1042. Separator; 1043. Decarbonized liquid recovery pipe; 1044. Separation component temperature gauge; 1061. Biogas inlet valve; 1081. Gas pipe temperature gauge; 1082. Gas pipe pressure gauge; 1091. Filter; 1092. Decarbonized liquid filter inlet pipe; 1093. Decarbonized liquid filter outlet pipe; 1094. Decarbonized liquid filter valve; 1101. Liquid level meter; 1102. Controller; 1103. Control valve. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 and Figure 2 As shown, a carbon dioxide recovery system includes an absorption tower 101, a desorption tower 102, a decarbonization liquid circulation component 103 and a carbon dioxide separation component 104. The absorption tower 101 is provided with a biogas inlet pipe 105 and a biogas outlet pipe 106 connected thereto. The absorption tower 101 and the desorption tower 102 are connected via a decarbonization liquid connecting pipe 107. The decarbonization liquid circulation component 103 is arranged between the absorption tower 101 and the desorption tower 102 and is connected to the absorption tower 101 and the desorption tower 102 respectively. The desorption tower 102 is provided with a carbon dioxide gas pipe 108 connected thereto, and the carbon dioxide separation component 104 is arranged on the carbon dioxide gas pipe 108.

[0021] In this embodiment, a filter assembly 109 is provided on the decarbonization liquid connecting pipe 107 .

[0022] In this embodiment, a regulating component 110 is provided between the absorption tower 101 and the decarbonization liquid connecting pipe 107 .

[0023] In this embodiment, the decarbonization liquid circulation component 103 includes at least one circulation pump 1031, and the circulation pump 1031 is connected to the analysis tower 102 and the absorption tower 101 through the decarbonization liquid circulation inlet pipe 1032 and the decarbonization liquid circulation outlet pipe 1033 respectively. The decarbonization liquid circulation inlet pipe 1032 is provided with a decarbonization liquid circulation pressure gauge 1034.

[0024] In this embodiment, when there are multiple circulation pumps 1031, each circulation pump 1031 is connected to the decarbonization liquid circulation inlet pipe 1032 and the decarbonization liquid circulation outlet pipe 1033 respectively.

[0025] In this embodiment, a gas pipe temperature gauge 1081 and a gas pipe pressure gauge 1082 are respectively provided on the carbon dioxide gas pipe 108 .

[0026] In this embodiment, the carbon dioxide separation component 104 includes a water cooler 1041 and a separator 1042, and the water cooler 1041 and the separator 1042 are both arranged on the carbon dioxide gas pipe 108. The separator 1042 is provided with a decarbonization liquid recovery pipe 1043 connected to the analysis tower 102, and the carbon dioxide gas pipe 108 located between the water cooler 1041 and the separator 1042 is provided with a separation component temperature gauge 1044.

[0027] In this embodiment, the filter assembly 109 includes a filter 1091, and the filter 1091 is provided with a decarbonization liquid filter inlet pipe 1092 and a decarbonization liquid filter outlet pipe 1093 connected thereto, and the decarbonization liquid filter inlet pipe 1092 and the decarbonization liquid filter outlet pipe 1093 are respectively connected to the decarbonization liquid connecting pipe 107, and the decarbonization liquid filter inlet pipe 1092, the decarbonization liquid filter outlet pipe 1093 and the decarbonization liquid connecting pipe 107 located between the decarbonization liquid filter inlet pipe 1092 and the decarbonization liquid filter outlet pipe 1093 are all provided with a decarbonization liquid filter valve 1094.

[0028] In this embodiment, the regulating component 110 includes a liquid level meter 1101, a controller 1102 and a regulating valve 1103 arranged on the decarbonization liquid connecting pipe 107 close to one end of the absorption tower 101, and the liquid level meter 1101, the controller 1102 and the regulating valve 1103 are electrically connected in sequence.

[0029] In this embodiment, a biogas inlet valve 1061 is provided on the biogas inlet pipe 105 .

[0030] A carbon dioxide recovery system relates to a carbon dioxide recovery method, which is implemented by comprising the following steps:

[0031] Step 10, injecting decarbonization liquid into the absorption tower 101, biogas enters the absorption tower 101 through the biogas inlet pipe 105, the decarbonization liquid absorbs carbon dioxide in the biogas, and the biogas after absorbing carbon dioxide is discharged through the biogas outlet pipe 106, and then proceeding to step 20;

[0032] Step 20, the decarbonized liquid after absorbing carbon dioxide enters the decarbonization tower 102 through the decarbonization liquid connecting pipe 107, and the decarbonization tower 102 separates the decarbonized liquid after absorbing carbon dioxide into carbon dioxide and decarbonized liquid, and then enters step 30;

[0033] Step 30, the separated decarbonized liquid returns to the absorption tower 101 through the decarbonized liquid circulation component 103, and the separated carbon dioxide enters the water cooler 1041 through the carbon dioxide gas pipe 108, and then enters step 40;

[0034] Step 40: The water cooler 1041 liquefies the separated carbon dioxide, and the liquefied carbon dioxide enters the separator 1042, and then proceeds to step 50;

[0035] Step 50, the liquefied carbon dioxide is separated into carbon dioxide and decarbonized liquid in the separator 1042, the separated carbon dioxide enters the carbon dioxide inlet and diversion component 204 through the carbon dioxide gas pipe 108, and the separated decarbonized liquid returns to the desorption tower 102 through the decarbonized liquid recovery pipe 1043, and then proceeds to step 60;

[0036] Step 60, carbon dioxide enters through the carbon dioxide intake and diversion component 204, the carbon dioxide diversion control valve 2043, the carbon dioxide finished product control valve 2034 and the carbon dioxide connection control valve 2036 are opened, and the backwash control valve 2024 is closed to control the flow direction of carbon dioxide from the carbon dioxide intake and diversion component 204 to the carbon dioxide reaction component 201 and the carbon dioxide finished product component 203 in sequence. If carbon dioxide finished product preparation is performed, step 70 is performed, and if carbon dioxide reaction component 201 is backwashed, step 80 is performed;

[0037] Step 70: Inject reactants into the carbon dioxide reaction assembly 201 according to the carbon dioxide product to be prepared, and the carbon dioxide enters the carbon dioxide reaction assembly 201, reacts in the carbon dioxide reaction assembly 201 to generate a carbon dioxide product, and the generated carbon dioxide product is discharged through the carbon dioxide product assembly 203;

[0038] Step 80, setting the backflush pressure value of the carbon dioxide reaction component 201. When the carbon dioxide diversion pressure gauge 2044 detects that the pressure inside the carbon dioxide reaction component 201 exceeds the backflush pressure value of the carbon dioxide reaction component 201, close the carbon dioxide diversion control valve 2043, open the backflush control valve 2024, the carbon dioxide finished product control valve 2034 and the carbon dioxide connection control valve 2036, and control the flow direction of carbon dioxide from the carbon dioxide finished product component 203 to the carbon dioxide reaction component 201 and the backflush component 202 in sequence. The carbon dioxide gas is backflushed to blow the dust inside the carbon dioxide reaction component 201 into the backflush component 202 and discharged from the backflush component 202.

[0039] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A carbon dioxide recovery system, characterized in that: It includes an absorption tower, a desorption tower, a decarbonization liquid circulation component and a carbon dioxide separation component. The absorption tower is provided with a biogas inlet pipe and a biogas outlet pipe connected thereto. The absorption tower and the desorption tower are connected via a decarbonization liquid connecting pipe. The decarbonization liquid circulation component is arranged between the absorption tower and the desorption tower and is connected to the absorption tower and the desorption tower respectively. The desorption tower is provided with a carbon dioxide gas pipe connected thereto, and the carbon dioxide separation component is arranged on the carbon dioxide gas pipe.

2. A carbon dioxide recovery system according to claim 1, characterized in that: The decarbonization liquid connecting pipe is provided with a filtering component.

3. A carbon dioxide recovery system according to claim 1 or 2, characterized in that: A regulating component is provided between the absorption tower and the decarbonization liquid connecting pipe.

4. A carbon dioxide recovery system according to claim 3, characterized in that: The decarbonization liquid circulation component comprises at least one circulation pump, which is connected to the analysis tower and the absorption tower through a decarbonization liquid circulation inlet pipe and a decarbonization liquid circulation outlet pipe respectively, and a decarbonization liquid circulation pressure gauge is arranged on the decarbonization liquid circulation inlet pipe.

5. A carbon dioxide recovery system according to claim 4, characterized in that: When there are multiple circulating pumps, each circulating pump is respectively connected to the decarbonization liquid circulating inlet pipe and the decarbonization liquid circulating outlet pipe.

6. A carbon dioxide recovery system according to claim 5, characterized in that: The carbon dioxide gas pipe is respectively provided with a gas pipe temperature gauge and a gas pipe pressure gauge.

7. A carbon dioxide recovery system according to claim 6, characterized in that: The carbon dioxide separation component includes a water cooler and a separator, both of which are arranged on the carbon dioxide gas pipe. The separator is provided with a decarbonization liquid recovery pipe connected to the analysis tower, and a separation component temperature gauge is provided on the carbon dioxide gas pipe between the water cooler and the separator.

8. A carbon dioxide recovery system according to claim 2, characterized in that: The filter assembly includes a filter, and the filter is provided with a decarbonization liquid filter inlet pipe and a decarbonization liquid filter outlet pipe connected thereto, and the decarbonization liquid filter inlet pipe and the decarbonization liquid filter outlet pipe are respectively connected to the decarbonization liquid connecting pipe, and the decarbonization liquid filter inlet pipe, the decarbonization liquid filter outlet pipe and the decarbonization liquid connecting pipe located between the decarbonization liquid filter inlet pipe and the decarbonization liquid filter outlet pipe are all provided with a decarbonization liquid filter valve.

9. A carbon dioxide recovery system according to claim 3, characterized in that: The regulating assembly comprises a liquid level meter, a controller and a regulating valve arranged on the decarbonization liquid connecting pipe close to one end of the absorption tower, and the liquid level meter, the controller and the regulating valve are electrically connected in sequence.

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